merge with stable
authorAugie Fackler <augie@google.com>
Fri, 24 Apr 2020 15:06:42 -0400
changeset 44757 f365dfede78f
parent 44756 27fe8cc1338f (diff)
parent 44748 a467416c493c (current diff)
child 44758 45f3f35cefe7
merge with stable
--- a/mercurial/localrepo.py	Thu Apr 23 09:59:38 2020 +0200
+++ b/mercurial/localrepo.py	Fri Apr 24 15:06:42 2020 -0400
@@ -3016,6 +3016,12 @@
                     self.ui.write(
                         _(b'note: commit message saved in %s\n') % msgfn
                     )
+                    self.ui.write(
+                        _(
+                            b"note: use 'hg commit --logfile "
+                            b".hg/last-message.txt --edit' to reuse it\n"
+                        )
+                    )
                 raise
 
         def commithook(unused_success):
--- a/rust/chg/Cargo.lock	Thu Apr 23 09:59:38 2020 +0200
+++ b/rust/chg/Cargo.lock	Fri Apr 24 15:06:42 2020 -0400
@@ -6,9 +6,14 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "autocfg"
-version = "1.0.0"
+name = "async-trait"
+version = "0.1.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "bitflags"
@@ -16,20 +21,11 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "byteorder"
-version = "1.3.4"
+name = "bytes"
+version = "0.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "bytes"
-version = "0.4.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "iovec 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
 name = "cc"
 version = "1.0.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -43,91 +39,17 @@
 name = "chg"
 version = "0.1.0"
 dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "async-trait 0.1.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bytes 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.69 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio 0.1.22 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-hglib 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-process 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-timer 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "cloudabi"
-version = "0.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "crossbeam-deque"
-version = "0.7.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "crossbeam-epoch 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "maybe-uninit 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "crossbeam-epoch"
-version = "0.8.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "maybe-uninit 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "memoffset 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "scopeguard 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-hglib 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "crossbeam-queue"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "crossbeam-queue"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "crossbeam-utils"
-version = "0.6.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "crossbeam-utils"
-version = "0.7.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "fnv"
-version = "1.0.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
 name = "fuchsia-zircon"
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -143,15 +65,84 @@
 
 [[package]]
 name = "futures"
-version = "0.1.29"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "futures-channel 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-executor 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-io 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-sink 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-task 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-util 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "futures-channel"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-sink 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "futures-core"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "hermit-abi"
-version = "0.1.10"
+name = "futures-executor"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-task 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-util 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "futures-io"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "futures-macro"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-hack 0.5.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "futures-sink"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "futures-task"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "futures-util"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "futures-channel 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-io 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-macro 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-sink 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-task 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pin-utils 0.1.0-alpha.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-hack 0.5.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-nested 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -159,7 +150,7 @@
 version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.69 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -178,18 +169,10 @@
 
 [[package]]
 name = "libc"
-version = "0.2.68"
+version = "0.2.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "lock_api"
-version = "0.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "scopeguard 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
 name = "log"
 version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -198,19 +181,11 @@
 ]
 
 [[package]]
-name = "maybe-uninit"
-version = "2.0.0"
+name = "memchr"
+version = "2.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "memoffset"
-version = "0.5.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
 name = "mio"
 version = "0.6.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -220,7 +195,7 @@
  "fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "iovec 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.69 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "miow 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "net2 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -245,7 +220,7 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "iovec 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.69 (registry+https://github.com/rust-lang/crates.io-index)",
  "mio 0.6.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -265,7 +240,7 @@
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "socket2 0.3.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "socket2 0.3.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -275,41 +250,44 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.69 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "num_cpus"
-version = "1.12.0"
+name = "pin-project-lite"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "pin-utils"
+version = "0.1.0-alpha.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "proc-macro-hack"
+version = "0.5.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "proc-macro-nested"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "hermit-abi 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "parking_lot"
-version = "0.9.0"
+name = "quote"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lock_api 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot_core 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "parking_lot_core"
-version = "0.6.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.10 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -318,38 +296,12 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "rustc_version"
-version = "0.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "scopeguard"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "semver"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "semver-parser"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
 name = "signal-hook-registry"
 version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "arc-swap 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.69 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -358,240 +310,85 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "smallvec"
-version = "0.6.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "maybe-uninit 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
 name = "socket2"
-version = "0.3.11"
+version = "0.3.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.69 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "tokio"
-version = "0.1.22"
+name = "syn"
+version = "1.0.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
- "mio 0.6.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 1.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-codec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-current-thread 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-executor 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-fs 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-reactor 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-sync 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-tcp 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-threadpool 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-timer 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-udp 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-uds 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-codec"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-current-thread"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-executor 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "tokio-executor"
-version = "0.1.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-fs"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-threadpool 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-hglib"
-version = "0.2.0"
+name = "tokio"
+version = "0.2.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio 0.1.22 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-codec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-process 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-uds 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-io"
-version = "0.1.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-process"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "crossbeam-queue 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bytes 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.69 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "mio 0.6.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "mio-named-pipes 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-reactor 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-signal 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "mio-uds 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pin-project-lite 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "signal-hook-registry 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-macros 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "tokio-reactor"
-version = "0.1.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "mio 0.6.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 1.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-executor 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-sync 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-signal"
-version = "0.2.9"
+name = "tokio-hglib"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
- "mio 0.6.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "mio-uds 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "signal-hook-registry 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-executor 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-reactor 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-sync"
-version = "0.1.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-tcp"
-version = "0.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
- "iovec 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "mio 0.6.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-reactor 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "async-trait 0.1.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bytes 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-util 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "tokio-threadpool"
-version = "0.1.18"
+name = "tokio-macros"
+version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "crossbeam-deque 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam-queue 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 1.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-executor 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-timer"
-version = "0.2.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
- "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-executor 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "tokio-udp"
-version = "0.1.6"
+name = "tokio-util"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bytes 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-sink 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "mio 0.6.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-codec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-reactor 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pin-project-lite 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "tokio-uds"
-version = "0.2.6"
+name = "unicode-xid"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
- "iovec 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "mio 0.6.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "mio-uds 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-codec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-reactor 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
-]
 
 [[package]]
 name = "winapi"
@@ -633,66 +430,50 @@
 
 [metadata]
 "checksum arc-swap 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)" = "d663a8e9a99154b5fb793032533f6328da35e23aac63d5c152279aa8ba356825"
-"checksum autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f8aac770f1885fd7e387acedd76065302551364496e46b3dd00860b2f8359b9d"
+"checksum async-trait 0.1.30 (registry+https://github.com/rust-lang/crates.io-index)" = "da71fef07bc806586090247e971229289f64c210a278ee5ae419314eb386b31d"
 "checksum bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
-"checksum byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
-"checksum bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)" = "206fdffcfa2df7cbe15601ef46c813fce0965eb3286db6b56c583b814b51c81c"
+"checksum bytes 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)" = "130aac562c0dd69c56b3b1cc8ffd2e17be31d0b6c25b61c96b76231aa23e39e1"
 "checksum cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)" = "95e28fa049fda1c330bcf9d723be7663a899c4679724b34c81e9f5a326aab8cd"
 "checksum cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
-"checksum cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
-"checksum crossbeam-deque 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)" = "9f02af974daeee82218205558e51ec8768b48cf524bd01d550abe5573a608285"
-"checksum crossbeam-epoch 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)" = "058ed274caafc1f60c4997b5fc07bf7dc7cca454af7c6e81edffe5f33f70dace"
-"checksum crossbeam-queue 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7c979cd6cfe72335896575c6b5688da489e420d36a27a0b9eb0c73db574b4a4b"
-"checksum crossbeam-queue 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c695eeca1e7173472a32221542ae469b3e9aac3a4fc81f7696bcad82029493db"
-"checksum crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)" = "04973fa96e96579258a5091af6003abde64af786b860f18622b82e026cca60e6"
-"checksum crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c3c7c73a2d1e9fc0886a08b93e98eb643461230d5f1925e4036204d5f2e261a8"
-"checksum fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "2fad85553e09a6f881f739c29f0b00b0f01357c743266d478b68951ce23285f3"
 "checksum fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
 "checksum fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
-"checksum futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)" = "1b980f2816d6ee8673b6517b52cb0e808a180efc92e5c19d02cdda79066703ef"
-"checksum hermit-abi 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "725cf19794cf90aa94e65050cb4191ff5d8fa87a498383774c47b332e3af952e"
+"checksum futures 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "5c329ae8753502fb44ae4fc2b622fa2a94652c41e795143765ba0927f92ab780"
+"checksum futures-channel 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "f0c77d04ce8edd9cb903932b608268b3fffec4163dc053b3b402bf47eac1f1a8"
+"checksum futures-core 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "f25592f769825e89b92358db00d26f965761e094951ac44d3663ef25b7ac464a"
+"checksum futures-executor 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "f674f3e1bcb15b37284a90cedf55afdba482ab061c407a9c0ebbd0f3109741ba"
+"checksum futures-io 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "a638959aa96152c7a4cddf50fcb1e3fede0583b27157c26e67d6f99904090dc6"
+"checksum futures-macro 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "9a5081aa3de1f7542a794a397cde100ed903b0630152d0973479018fd85423a7"
+"checksum futures-sink 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "3466821b4bc114d95b087b850a724c6f83115e929bc88f1fa98a3304a944c8a6"
+"checksum futures-task 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "7b0a34e53cf6cdcd0178aa573aed466b646eb3db769570841fda0c7ede375a27"
+"checksum futures-util 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "22766cf25d64306bedf0384da004d05c9974ab104fcc4528f1236181c18004c5"
 "checksum iovec 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b2b3ea6ff95e175473f8ffe6a7eb7c00d054240321b84c57051175fe3c1e075e"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
 "checksum lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
-"checksum libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)" = "dea0c0405123bba743ee3f91f49b1c7cfb684eef0da0a50110f758ccf24cdff0"
-"checksum lock_api 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "79b2de95ecb4691949fea4716ca53cdbcfccb2c612e19644a8bad05edcf9f47b"
+"checksum libc 0.2.69 (registry+https://github.com/rust-lang/crates.io-index)" = "99e85c08494b21a9054e7fe1374a732aeadaff3980b6990b94bfd3a70f690005"
 "checksum log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)" = "14b6052be84e6b71ab17edffc2eeabf5c2c3ae1fdb464aae35ac50c67a44e1f7"
-"checksum maybe-uninit 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "60302e4db3a61da70c0cb7991976248362f30319e88850c487b9b95bbf059e00"
-"checksum memoffset 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b4fc2c02a7e374099d4ee95a193111f72d2110197fe200272371758f6c3643d8"
+"checksum memchr 2.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3728d817d99e5ac407411fa471ff9800a778d88a24685968b36824eaf4bee400"
 "checksum mio 0.6.21 (registry+https://github.com/rust-lang/crates.io-index)" = "302dec22bcf6bae6dfb69c647187f4b4d0fb6f535521f7bc022430ce8e12008f"
 "checksum mio-named-pipes 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "f5e374eff525ce1c5b7687c4cef63943e7686524a387933ad27ca7ec43779cb3"
 "checksum mio-uds 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)" = "966257a94e196b11bb43aca423754d87429960a768de9414f3691d6957abf125"
 "checksum miow 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8c1f2f3b1cf331de6896aabf6e9d55dca90356cc9960cca7eaaf408a355ae919"
 "checksum miow 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "396aa0f2003d7df8395cb93e09871561ccc3e785f0acb369170e8cc74ddf9226"
 "checksum net2 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)" = "42550d9fb7b6684a6d404d9fa7250c2eb2646df731d1c06afc06dcee9e1bcf88"
-"checksum num_cpus 1.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "46203554f085ff89c235cd12f7075f3233af9b11ed7c9e16dfe2560d03313ce6"
-"checksum parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f842b1982eb6c2fe34036a4fbfb06dd185a3f5c8edfaacdf7d1ea10b07de6252"
-"checksum parking_lot_core 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "b876b1b9e7ac6e1a74a6da34d25c42e17e8862aa409cbbbdcfc8d86c6f3bc62b"
+"checksum pin-project-lite 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "237844750cfbb86f67afe27eee600dfbbcb6188d734139b534cbfbf4f96792ae"
+"checksum pin-utils 0.1.0-alpha.4 (registry+https://github.com/rust-lang/crates.io-index)" = "5894c618ce612a3fa23881b152b608bafb8c56cfc22f434a3ba3120b40f7b587"
+"checksum proc-macro-hack 0.5.15 (registry+https://github.com/rust-lang/crates.io-index)" = "0d659fe7c6d27f25e9d80a1a094c223f5246f6a6596453e09d7229bf42750b63"
+"checksum proc-macro-nested 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8e946095f9d3ed29ec38de908c22f95d9ac008e424c7bcae54c75a79c527c694"
+"checksum proc-macro2 1.0.10 (registry+https://github.com/rust-lang/crates.io-index)" = "df246d292ff63439fea9bc8c0a270bed0e390d5ebd4db4ba15aba81111b5abe3"
+"checksum quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2bdc6c187c65bca4260c9011c9e3132efe4909da44726bad24cf7572ae338d7f"
 "checksum redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)" = "2439c63f3f6139d1b57529d16bc3b8bb855230c8efcc5d3a896c8bea7c3b1e84"
-"checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
-"checksum scopeguard 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
-"checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
-"checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 "checksum signal-hook-registry 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "94f478ede9f64724c5d173d7bb56099ec3e2d9fc2774aac65d34b8b890405f41"
 "checksum slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
-"checksum smallvec 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)" = "f7b0758c52e15a8b5e3691eae6cc559f08eee9406e548a4477ba4e67770a82b6"
-"checksum socket2 0.3.11 (registry+https://github.com/rust-lang/crates.io-index)" = "e8b74de517221a2cb01a53349cf54182acdc31a074727d3079068448c0676d85"
-"checksum tokio 0.1.22 (registry+https://github.com/rust-lang/crates.io-index)" = "5a09c0b5bb588872ab2f09afa13ee6e9dac11e10a0ec9e8e3ba39a5a5d530af6"
-"checksum tokio-codec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "25b2998660ba0e70d18684de5d06b70b70a3a747469af9dea7618cc59e75976b"
-"checksum tokio-current-thread 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "b1de0e32a83f131e002238d7ccde18211c0a5397f60cbfffcb112868c2e0e20e"
-"checksum tokio-executor 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "fb2d1b8f4548dbf5e1f7818512e9c406860678f29c300cdf0ebac72d1a3a1671"
-"checksum tokio-fs 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "297a1206e0ca6302a0eed35b700d292b275256f596e2f3fea7729d5e629b6ff4"
-"checksum tokio-hglib 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8a138c3cb866c8a95ceddae44634bb159eefeebcdba45aec2158f8ad6c201e6d"
-"checksum tokio-io 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)" = "57fc868aae093479e3131e3d165c93b1c7474109d13c90ec0dda2a1bbfff0674"
-"checksum tokio-process 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "382d90f43fa31caebe5d3bc6cfd854963394fff3b8cb59d5146607aaae7e7e43"
-"checksum tokio-reactor 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)" = "09bc590ec4ba8ba87652da2068d150dcada2cfa2e07faae270a5e0409aa51351"
-"checksum tokio-signal 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)" = "d0c34c6e548f101053321cba3da7cbb87a610b85555884c41b07da2eb91aff12"
-"checksum tokio-sync 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "edfe50152bc8164fcc456dab7891fa9bf8beaf01c5ee7e1dd43a397c3cf87dee"
-"checksum tokio-tcp 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "98df18ed66e3b72e742f185882a9e201892407957e45fbff8da17ae7a7c51f72"
-"checksum tokio-threadpool 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)" = "df720b6581784c118f0eb4310796b12b1d242a7eb95f716a8367855325c25f89"
-"checksum tokio-timer 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)" = "93044f2d313c95ff1cb7809ce9a7a05735b012288a888b62d4434fd58c94f296"
-"checksum tokio-udp 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "e2a0b10e610b39c38b031a2fcab08e4b82f16ece36504988dcbd81dbba650d82"
-"checksum tokio-uds 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "5076db410d6fdc6523df7595447629099a1fdc47b3d9f896220780fa48faf798"
+"checksum socket2 0.3.12 (registry+https://github.com/rust-lang/crates.io-index)" = "03088793f677dce356f3ccc2edb1b314ad191ab702a5de3faf49304f7e104918"
+"checksum syn 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)" = "0df0eb663f387145cab623dea85b09c2c5b4b0aef44e945d928e682fce71bb03"
+"checksum tokio 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)" = "34ef16d072d2b6dc8b4a56c70f5c5ced1a37752116f8e7c1e80c659aa7cb6713"
+"checksum tokio-hglib 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8d7e2b5d44911ebf67a1044423604f5f69206c5cbbd7e911b4966e6831514bca"
+"checksum tokio-macros 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "f0c3acc6aa564495a0f2e1d59fab677cd7f81a19994cfc7f3ad0e64301560389"
+"checksum tokio-util 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "be8242891f2b6cbef26a2d7e8605133c2c554cd35b3e4948ea892d6d68436499"
+"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
 "checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
 "checksum winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
 "checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
--- a/rust/chg/Cargo.toml	Thu Apr 23 09:59:38 2020 +0200
+++ b/rust/chg/Cargo.toml	Fri Apr 24 15:06:42 2020 -0400
@@ -7,14 +7,16 @@
 edition = "2018"
 
 [dependencies]
-bytes = "0.4"
-futures = "0.1"
+async-trait = "0.1"
+bytes = "0.5"
+futures = "0.3"
 libc = "0.2"
 log = { version = "0.4", features = ["std"] }
-tokio = "0.1"
-tokio-hglib = "0.2"
-tokio-process = "0.2.3"
-tokio-timer = "0.2"
+tokio-hglib = "0.3"
+
+[dependencies.tokio]
+version = "0.2"
+features = ["rt-core", "io-util", "time", "process", "macros"]
 
 [build-dependencies]
 cc = "1.0"
--- a/rust/chg/src/attachio.rs	Thu Apr 23 09:59:38 2020 +0200
+++ b/rust/chg/src/attachio.rs	Fri Apr 24 15:06:42 2020 -0400
@@ -5,17 +5,15 @@
 
 //! Functions to send client-side fds over the command server channel.
 
-use futures::{try_ready, Async, Future, Poll};
 use std::io;
 use std::os::unix::io::AsRawFd;
 use tokio_hglib::codec::ChannelMessage;
-use tokio_hglib::protocol::MessageLoop;
-use tokio_hglib::{Client, Connection};
+use tokio_hglib::{Connection, Protocol};
 
 use crate::message;
 use crate::procutil;
 
-/// Future to send client-side fds over the command server channel.
+/// Sends client-side fds over the command server channel.
 ///
 /// This works as follows:
 /// 1. Client sends "attachio" request.
@@ -23,92 +21,48 @@
 /// 3. Client sends fds with 1-byte dummy payload in response.
 /// 4. Server returns the number of the fds received.
 ///
-/// If the stderr is omitted, it will be redirected to the stdout. This
-/// allows us to attach the pager stdin to both stdout and stderr, and
-/// dispose of the client-side handle once attached.
-#[must_use = "futures do nothing unless polled"]
-pub struct AttachIo<C, I, O, E>
-where
-    C: Connection,
-{
-    msg_loop: MessageLoop<C>,
-    stdin: I,
-    stdout: O,
-    stderr: Option<E>,
-}
-
-impl<C, I, O, E> AttachIo<C, I, O, E>
-where
-    C: Connection + AsRawFd,
-    I: AsRawFd,
-    O: AsRawFd,
-    E: AsRawFd,
-{
-    pub fn with_client(
-        client: Client<C>,
-        stdin: I,
-        stdout: O,
-        stderr: Option<E>,
-    ) -> AttachIo<C, I, O, E> {
-        let msg_loop = MessageLoop::start(client, b"attachio");
-        AttachIo {
-            msg_loop,
-            stdin,
-            stdout,
-            stderr,
-        }
-    }
-}
-
-impl<C, I, O, E> Future for AttachIo<C, I, O, E>
-where
-    C: Connection + AsRawFd,
-    I: AsRawFd,
-    O: AsRawFd,
-    E: AsRawFd,
-{
-    type Item = Client<C>;
-    type Error = io::Error;
-
-    fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
-        loop {
-            let (client, msg) = try_ready!(self.msg_loop.poll());
-            match msg {
-                ChannelMessage::Data(b'r', data) => {
-                    let fd_cnt = message::parse_result_code(data)?;
-                    if fd_cnt == 3 {
-                        return Ok(Async::Ready(client));
-                    } else {
-                        return Err(io::Error::new(
-                            io::ErrorKind::InvalidData,
-                            "unexpected attachio result",
-                        ));
-                    }
-                }
-                ChannelMessage::Data(..) => {
-                    // just ignore data sent to uninteresting (optional) channel
-                    self.msg_loop = MessageLoop::resume(client);
-                }
-                ChannelMessage::InputRequest(1) => {
-                    // this may fail with EWOULDBLOCK in theory, but the
-                    // payload is quite small, and the send buffer should
-                    // be empty so the operation will complete immediately
-                    let sock_fd = client.as_raw_fd();
-                    let ifd = self.stdin.as_raw_fd();
-                    let ofd = self.stdout.as_raw_fd();
-                    let efd = self.stderr.as_ref().map_or(ofd, |f| f.as_raw_fd());
-                    procutil::send_raw_fds(sock_fd, &[ifd, ofd, efd])?;
-                    self.msg_loop = MessageLoop::resume(client);
-                }
-                ChannelMessage::InputRequest(..)
-                | ChannelMessage::LineRequest(..)
-                | ChannelMessage::SystemRequest(..) => {
+/// The client-side fds may be dropped once duplicated to the server.
+pub async fn attach_io(
+    proto: &mut Protocol<impl Connection + AsRawFd>,
+    stdin: &impl AsRawFd,
+    stdout: &impl AsRawFd,
+    stderr: &impl AsRawFd,
+) -> io::Result<()> {
+    proto.send_command("attachio").await?;
+    loop {
+        match proto.fetch_response().await? {
+            ChannelMessage::Data(b'r', data) => {
+                let fd_cnt = message::parse_result_code(data)?;
+                if fd_cnt == 3 {
+                    return Ok(());
+                } else {
                     return Err(io::Error::new(
                         io::ErrorKind::InvalidData,
-                        "unsupported request while attaching io",
+                        "unexpected attachio result",
                     ));
                 }
             }
+            ChannelMessage::Data(..) => {
+                // just ignore data sent to uninteresting (optional) channel
+            }
+            ChannelMessage::InputRequest(1) => {
+                // this may fail with EWOULDBLOCK in theory, but the
+                // payload is quite small, and the send buffer should
+                // be empty so the operation will complete immediately
+                let sock_fd = proto.as_raw_fd();
+                let ifd = stdin.as_raw_fd();
+                let ofd = stdout.as_raw_fd();
+                let efd = stderr.as_raw_fd();
+                procutil::send_raw_fds(sock_fd, &[ifd, ofd, efd])?;
+            }
+            ChannelMessage::InputRequest(..)
+            | ChannelMessage::LineRequest(..)
+            | ChannelMessage::SystemRequest(..) => {
+                return Err(io::Error::new(
+                    io::ErrorKind::InvalidData,
+                    "unsupported request while attaching io",
+                ));
+            }
         }
     }
 }
--- a/rust/chg/src/clientext.rs	Thu Apr 23 09:59:38 2020 +0200
+++ b/rust/chg/src/clientext.rs	Fri Apr 24 15:06:42 2020 -0400
@@ -5,55 +5,99 @@
 
 //! cHg extensions to command server client.
 
-use bytes::{BufMut, Bytes, BytesMut};
+use bytes::{BufMut, BytesMut};
 use std::ffi::OsStr;
 use std::io;
 use std::mem;
 use std::os::unix::ffi::OsStrExt;
 use std::os::unix::io::AsRawFd;
 use std::path::Path;
-use tokio_hglib::protocol::{OneShotQuery, OneShotRequest};
-use tokio_hglib::{Client, Connection};
+use tokio_hglib::UnixClient;
 
-use crate::attachio::AttachIo;
-use crate::message::{self, Instruction};
-use crate::runcommand::ChgRunCommand;
+use crate::attachio;
+use crate::message::{self, Instruction, ServerSpec};
+use crate::runcommand;
 use crate::uihandler::SystemHandler;
 
-pub trait ChgClientExt<C>
-where
-    C: Connection + AsRawFd,
-{
+/// Command-server client that also supports cHg extensions.
+pub struct ChgClient {
+    client: UnixClient,
+}
+
+impl ChgClient {
+    /// Connects to a command server listening at the specified socket path.
+    pub async fn connect(path: impl AsRef<Path>) -> io::Result<Self> {
+        let client = UnixClient::connect(path).await?;
+        Ok(ChgClient { client })
+    }
+
+    /// Server capabilities, encoding, etc.
+    pub fn server_spec(&self) -> &ServerSpec {
+        self.client.server_spec()
+    }
+
     /// Attaches the client file descriptors to the server.
-    fn attach_io<I, O, E>(self, stdin: I, stdout: O, stderr: E) -> AttachIo<C, I, O, E>
-    where
-        I: AsRawFd,
-        O: AsRawFd,
-        E: AsRawFd;
+    pub async fn attach_io(
+        &mut self,
+        stdin: &impl AsRawFd,
+        stdout: &impl AsRawFd,
+        stderr: &impl AsRawFd,
+    ) -> io::Result<()> {
+        attachio::attach_io(self.client.borrow_protocol_mut(), stdin, stdout, stderr).await
+    }
 
     /// Changes the working directory of the server.
-    fn set_current_dir(self, dir: impl AsRef<Path>) -> OneShotRequest<C>;
+    pub async fn set_current_dir(&mut self, dir: impl AsRef<Path>) -> io::Result<()> {
+        let dir_bytes = dir.as_ref().as_os_str().as_bytes().to_owned();
+        self.client
+            .borrow_protocol_mut()
+            .send_command_with_args("chdir", dir_bytes)
+            .await
+    }
 
     /// Updates the environment variables of the server.
-    fn set_env_vars_os(
-        self,
+    pub async fn set_env_vars_os(
+        &mut self,
         vars: impl IntoIterator<Item = (impl AsRef<OsStr>, impl AsRef<OsStr>)>,
-    ) -> OneShotRequest<C>;
+    ) -> io::Result<()> {
+        self.client
+            .borrow_protocol_mut()
+            .send_command_with_args("setenv", message::pack_env_vars_os(vars))
+            .await
+    }
 
     /// Changes the process title of the server.
-    fn set_process_name(self, name: impl AsRef<OsStr>) -> OneShotRequest<C>;
+    pub async fn set_process_name(&mut self, name: impl AsRef<OsStr>) -> io::Result<()> {
+        let name_bytes = name.as_ref().as_bytes().to_owned();
+        self.client
+            .borrow_protocol_mut()
+            .send_command_with_args("setprocname", name_bytes)
+            .await
+    }
 
     /// Changes the umask of the server process.
-    fn set_umask(self, mask: u32) -> OneShotRequest<C>;
+    pub async fn set_umask(&mut self, mask: u32) -> io::Result<()> {
+        let mut mask_bytes = BytesMut::with_capacity(mem::size_of_val(&mask));
+        mask_bytes.put_u32(mask);
+        self.client
+            .borrow_protocol_mut()
+            .send_command_with_args("setumask2", mask_bytes)
+            .await
+    }
 
     /// Runs the specified Mercurial command with cHg extension.
-    fn run_command_chg<H>(
-        self,
-        handler: H,
+    pub async fn run_command_chg(
+        &mut self,
+        handler: &mut impl SystemHandler,
         args: impl IntoIterator<Item = impl AsRef<OsStr>>,
-    ) -> ChgRunCommand<C, H>
-    where
-        H: SystemHandler;
+    ) -> io::Result<i32> {
+        runcommand::run_command(
+            self.client.borrow_protocol_mut(),
+            handler,
+            message::pack_args_os(args),
+        )
+        .await
+    }
 
     /// Validates if the server can run Mercurial commands with the expected
     /// configuration.
@@ -63,66 +107,15 @@
     ///
     /// Client-side environment must be sent prior to this request, by
     /// `set_current_dir()` and `set_env_vars_os()`.
-    fn validate(
-        self,
+    pub async fn validate(
+        &mut self,
         args: impl IntoIterator<Item = impl AsRef<OsStr>>,
-    ) -> OneShotQuery<C, fn(Bytes) -> io::Result<Vec<Instruction>>>;
-}
-
-impl<C> ChgClientExt<C> for Client<C>
-where
-    C: Connection + AsRawFd,
-{
-    fn attach_io<I, O, E>(self, stdin: I, stdout: O, stderr: E) -> AttachIo<C, I, O, E>
-    where
-        I: AsRawFd,
-        O: AsRawFd,
-        E: AsRawFd,
-    {
-        AttachIo::with_client(self, stdin, stdout, Some(stderr))
-    }
-
-    fn set_current_dir(self, dir: impl AsRef<Path>) -> OneShotRequest<C> {
-        OneShotRequest::start_with_args(self, b"chdir", dir.as_ref().as_os_str().as_bytes())
-    }
-
-    fn set_env_vars_os(
-        self,
-        vars: impl IntoIterator<Item = (impl AsRef<OsStr>, impl AsRef<OsStr>)>,
-    ) -> OneShotRequest<C> {
-        OneShotRequest::start_with_args(self, b"setenv", message::pack_env_vars_os(vars))
-    }
-
-    fn set_process_name(self, name: impl AsRef<OsStr>) -> OneShotRequest<C> {
-        OneShotRequest::start_with_args(self, b"setprocname", name.as_ref().as_bytes())
-    }
-
-    fn set_umask(self, mask: u32) -> OneShotRequest<C> {
-        let mut args = BytesMut::with_capacity(mem::size_of_val(&mask));
-        args.put_u32_be(mask);
-        OneShotRequest::start_with_args(self, b"setumask2", args)
-    }
-
-    fn run_command_chg<H>(
-        self,
-        handler: H,
-        args: impl IntoIterator<Item = impl AsRef<OsStr>>,
-    ) -> ChgRunCommand<C, H>
-    where
-        H: SystemHandler,
-    {
-        ChgRunCommand::with_client(self, handler, message::pack_args_os(args))
-    }
-
-    fn validate(
-        self,
-        args: impl IntoIterator<Item = impl AsRef<OsStr>>,
-    ) -> OneShotQuery<C, fn(Bytes) -> io::Result<Vec<Instruction>>> {
-        OneShotQuery::start_with_args(
-            self,
-            b"validate",
-            message::pack_args_os(args),
-            message::parse_instructions,
-        )
+    ) -> io::Result<Vec<Instruction>> {
+        let data = self
+            .client
+            .borrow_protocol_mut()
+            .query_with_args("validate", message::pack_args_os(args))
+            .await?;
+        message::parse_instructions(data)
     }
 }
--- a/rust/chg/src/lib.rs	Thu Apr 23 09:59:38 2020 +0200
+++ b/rust/chg/src/lib.rs	Fri Apr 24 15:06:42 2020 -0400
@@ -11,5 +11,5 @@
 mod runcommand;
 mod uihandler;
 
-pub use clientext::ChgClientExt;
+pub use clientext::ChgClient;
 pub use uihandler::{ChgUiHandler, SystemHandler};
--- a/rust/chg/src/locator.rs	Thu Apr 23 09:59:38 2020 +0200
+++ b/rust/chg/src/locator.rs	Fri Apr 24 15:06:42 2020 -0400
@@ -5,7 +5,6 @@
 
 //! Utility for locating command-server process.
 
-use futures::future::{self, Either, Loop};
 use log::debug;
 use std::env;
 use std::ffi::{OsStr, OsString};
@@ -14,14 +13,11 @@
 use std::os::unix::ffi::{OsStrExt, OsStringExt};
 use std::os::unix::fs::{DirBuilderExt, MetadataExt};
 use std::path::{Path, PathBuf};
-use std::process::{self, Command};
-use std::time::Duration;
-use tokio::prelude::*;
-use tokio_hglib::UnixClient;
-use tokio_process::{Child, CommandExt};
-use tokio_timer;
+use std::process::{self, Child, Command};
+use std::time::{Duration, Instant};
+use tokio::time;
 
-use crate::clientext::ChgClientExt;
+use crate::clientext::ChgClient;
 use crate::message::{Instruction, ServerSpec};
 use crate::procutil;
 
@@ -82,43 +78,33 @@
     /// Connects to the server.
     ///
     /// The server process will be spawned if not running.
-    pub fn connect(self) -> impl Future<Item = (Self, UnixClient), Error = io::Error> {
-        future::loop_fn((self, 0), |(loc, cnt)| {
-            if cnt < 10 {
-                let fut = loc
-                    .try_connect()
-                    .and_then(|(loc, client)| {
-                        client
-                            .validate(&loc.hg_early_args)
-                            .map(|(client, instructions)| (loc, client, instructions))
-                    })
-                    .and_then(move |(loc, client, instructions)| {
-                        loc.run_instructions(client, instructions, cnt)
-                    });
-                Either::A(fut)
-            } else {
-                let msg = format!(
-                    concat!(
-                        "too many redirections.\n",
-                        "Please make sure {:?} is not a wrapper which ",
-                        "changes sensitive environment variables ",
-                        "before executing hg. If you have to use a ",
-                        "wrapper, wrap chg instead of hg.",
-                    ),
-                    loc.hg_command
-                );
-                Either::B(future::err(io::Error::new(io::ErrorKind::Other, msg)))
+    pub async fn connect(&mut self) -> io::Result<ChgClient> {
+        for _cnt in 0..10 {
+            let mut client = self.try_connect().await?;
+            let instructions = client.validate(&self.hg_early_args).await?;
+            let reconnect = self.run_instructions(&instructions)?;
+            if !reconnect {
+                return Ok(client);
             }
-        })
+        }
+
+        let msg = format!(
+            concat!(
+                "too many redirections.\n",
+                "Please make sure {:?} is not a wrapper which ",
+                "changes sensitive environment variables ",
+                "before executing hg. If you have to use a ",
+                "wrapper, wrap chg instead of hg.",
+            ),
+            self.hg_command
+        );
+        Err(io::Error::new(io::ErrorKind::Other, msg))
     }
 
     /// Runs instructions received from the server.
-    fn run_instructions(
-        mut self,
-        client: UnixClient,
-        instructions: Vec<Instruction>,
-        cnt: usize,
-    ) -> io::Result<Loop<(Self, UnixClient), (Self, usize)>> {
+    ///
+    /// Returns true if the client should try connecting to the other server.
+    fn run_instructions(&mut self, instructions: &[Instruction]) -> io::Result<bool> {
         let mut reconnect = false;
         for inst in instructions {
             debug!("instruction: {:?}", inst);
@@ -126,7 +112,7 @@
                 Instruction::Exit(_) => {
                     // Just returns the current connection to run the
                     // unparsable command and report the error
-                    return Ok(Loop::Break((self, client)));
+                    return Ok(false);
                 }
                 Instruction::Reconnect => {
                     reconnect = true;
@@ -139,7 +125,7 @@
                         );
                         return Err(io::Error::new(io::ErrorKind::InvalidData, msg));
                     }
-                    self.redirect_sock_path = Some(path);
+                    self.redirect_sock_path = Some(path.to_owned());
                     reconnect = true;
                 }
                 Instruction::Unlink(path) => {
@@ -155,64 +141,44 @@
             }
         }
 
-        if reconnect {
-            Ok(Loop::Continue((self, cnt + 1)))
-        } else {
-            Ok(Loop::Break((self, client)))
-        }
+        Ok(reconnect)
     }
 
     /// Tries to connect to the existing server, or spawns new if not running.
-    fn try_connect(self) -> impl Future<Item = (Self, UnixClient), Error = io::Error> {
+    async fn try_connect(&mut self) -> io::Result<ChgClient> {
         let sock_path = self
             .redirect_sock_path
             .as_ref()
             .unwrap_or(&self.base_sock_path)
             .clone();
         debug!("try connect to {}", sock_path.display());
-        UnixClient::connect(sock_path)
-            .then(|res| {
-                match res {
-                    Ok(client) => Either::A(future::ok((self, client))),
-                    Err(_) => {
-                        // Prevent us from being re-connected to the outdated
-                        // master server: We were told by the server to redirect
-                        // to redirect_sock_path, which didn't work. We do not
-                        // want to connect to the same master server again
-                        // because it would probably tell us the same thing.
-                        if self.redirect_sock_path.is_some() {
-                            fs::remove_file(&self.base_sock_path).unwrap_or(());
-                            // may race
-                        }
-                        Either::B(self.spawn_connect())
-                    }
+        let mut client = match ChgClient::connect(sock_path).await {
+            Ok(client) => client,
+            Err(_) => {
+                // Prevent us from being re-connected to the outdated
+                // master server: We were told by the server to redirect
+                // to redirect_sock_path, which didn't work. We do not
+                // want to connect to the same master server again
+                // because it would probably tell us the same thing.
+                if self.redirect_sock_path.is_some() {
+                    fs::remove_file(&self.base_sock_path).unwrap_or(());
+                    // may race
                 }
-            })
-            .and_then(|(loc, client)| {
-                check_server_capabilities(client.server_spec())?;
-                Ok((loc, client))
-            })
-            .and_then(|(loc, client)| {
-                // It's purely optional, and the server might not support this command.
-                if client.server_spec().capabilities.contains("setprocname") {
-                    let fut = client
-                        .set_process_name(format!("chg[worker/{}]", loc.process_id))
-                        .map(|client| (loc, client));
-                    Either::A(fut)
-                } else {
-                    Either::B(future::ok((loc, client)))
-                }
-            })
-            .and_then(|(loc, client)| {
-                client
-                    .set_current_dir(&loc.current_dir)
-                    .map(|client| (loc, client))
-            })
-            .and_then(|(loc, client)| {
-                client
-                    .set_env_vars_os(loc.env_vars.iter().cloned())
-                    .map(|client| (loc, client))
-            })
+                self.spawn_connect().await?
+            }
+        };
+        check_server_capabilities(client.server_spec())?;
+        // It's purely optional, and the server might not support this command.
+        if client.server_spec().capabilities.contains("setprocname") {
+            client
+                .set_process_name(format!("chg[worker/{}]", self.process_id))
+                .await?;
+        }
+        client.set_current_dir(&self.current_dir).await?;
+        client
+            .set_env_vars_os(self.env_vars.iter().cloned())
+            .await?;
+        Ok(client)
     }
 
     /// Spawns new server process and connects to it.
@@ -220,10 +186,10 @@
     /// The server will be spawned at the current working directory, then
     /// chdir to "/", so that the server will load configs from the target
     /// repository.
-    fn spawn_connect(self) -> impl Future<Item = (Self, UnixClient), Error = io::Error> {
+    async fn spawn_connect(&mut self) -> io::Result<ChgClient> {
         let sock_path = self.temp_sock_path();
         debug!("start cmdserver at {}", sock_path.display());
-        Command::new(&self.hg_command)
+        let server = Command::new(&self.hg_command)
             .arg("serve")
             .arg("--cmdserver")
             .arg("chgunix")
@@ -236,68 +202,49 @@
             .env_clear()
             .envs(self.env_vars.iter().cloned())
             .env("CHGINTERNALMARK", "")
-            .spawn_async()
-            .into_future()
-            .and_then(|server| self.connect_spawned(server, sock_path))
-            .and_then(|(loc, client, sock_path)| {
-                debug!(
-                    "rename {} to {}",
-                    sock_path.display(),
-                    loc.base_sock_path.display()
-                );
-                fs::rename(&sock_path, &loc.base_sock_path)?;
-                Ok((loc, client))
-            })
+            .spawn()?;
+        let client = self.connect_spawned(server, &sock_path).await?;
+        debug!(
+            "rename {} to {}",
+            sock_path.display(),
+            self.base_sock_path.display()
+        );
+        fs::rename(&sock_path, &self.base_sock_path)?;
+        Ok(client)
     }
 
     /// Tries to connect to the just spawned server repeatedly until timeout
     /// exceeded.
-    fn connect_spawned(
-        self,
-        server: Child,
-        sock_path: PathBuf,
-    ) -> impl Future<Item = (Self, UnixClient, PathBuf), Error = io::Error> {
+    async fn connect_spawned(
+        &mut self,
+        mut server: Child,
+        sock_path: &Path,
+    ) -> io::Result<ChgClient> {
         debug!("try connect to {} repeatedly", sock_path.display());
-        let connect = future::loop_fn(sock_path, |sock_path| {
-            UnixClient::connect(sock_path.clone()).then(|res| {
-                match res {
-                    Ok(client) => Either::A(future::ok(Loop::Break((client, sock_path)))),
-                    Err(_) => {
-                        // try again with slight delay
-                        let fut = tokio_timer::sleep(Duration::from_millis(10))
-                            .map(|()| Loop::Continue(sock_path))
-                            .map_err(|err| io::Error::new(io::ErrorKind::Other, err));
-                        Either::B(fut)
-                    }
-                }
-            })
-        });
-
         // waits for either connection established or server failed to start
-        connect
-            .select2(server)
-            .map_err(|res| res.split().0)
-            .timeout(self.timeout)
-            .map_err(|err| {
-                err.into_inner().unwrap_or_else(|| {
-                    io::Error::new(
-                        io::ErrorKind::TimedOut,
-                        "timed out while connecting to server",
-                    )
-                })
-            })
-            .and_then(|res| {
-                match res {
-                    Either::A(((client, sock_path), server)) => {
-                        server.forget(); // continue to run in background
-                        Ok((self, client, sock_path))
-                    }
-                    Either::B((st, _)) => Err(io::Error::new(
-                        io::ErrorKind::Other,
-                        format!("server exited too early: {}", st),
-                    )),
-                }
-            })
+        let start_time = Instant::now();
+        while start_time.elapsed() < self.timeout {
+            if let Ok(client) = ChgClient::connect(&sock_path).await {
+                // server handle is dropped here, but the detached process
+                // will continue running in background
+                return Ok(client);
+            }
+
+            if let Some(st) = server.try_wait()? {
+                return Err(io::Error::new(
+                    io::ErrorKind::Other,
+                    format!("server exited too early: {}", st),
+                ));
+            }
+
+            // try again with slight delay
+            time::delay_for(Duration::from_millis(10)).await;
+        }
+
+        Err(io::Error::new(
+            io::ErrorKind::TimedOut,
+            "timed out while connecting to server",
+        ))
     }
 }
 
--- a/rust/chg/src/main.rs	Thu Apr 23 09:59:38 2020 +0200
+++ b/rust/chg/src/main.rs	Fri Apr 24 15:06:42 2020 -0400
@@ -5,13 +5,12 @@
 
 use chg::locator::{self, Locator};
 use chg::procutil;
-use chg::{ChgClientExt, ChgUiHandler};
-use futures::sync::oneshot;
+use chg::ChgUiHandler;
 use std::env;
 use std::io;
+use std::io::Write;
 use std::process;
 use std::time::Instant;
-use tokio::prelude::*;
 
 struct DebugLogger {
     start: Instant,
@@ -67,31 +66,23 @@
     process::exit(code);
 }
 
-fn run(umask: u32) -> io::Result<i32> {
+#[tokio::main]
+async fn run(umask: u32) -> io::Result<i32> {
     let mut loc = Locator::prepare_from_env()?;
     loc.set_early_args(locator::collect_early_args(env::args_os().skip(1)));
-    let handler = ChgUiHandler::new();
-    let (result_tx, result_rx) = oneshot::channel();
-    let fut = loc
-        .connect()
-        .and_then(|(_, client)| client.attach_io(io::stdin(), io::stdout(), io::stderr()))
-        .and_then(move |client| client.set_umask(umask))
-        .and_then(|client| {
-            let pid = client.server_spec().process_id.unwrap();
-            let pgid = client.server_spec().process_group_id;
-            procutil::setup_signal_handler_once(pid, pgid)?;
-            Ok(client)
-        })
-        .and_then(|client| client.run_command_chg(handler, env::args_os().skip(1)))
-        .map(|(_client, _handler, code)| {
-            procutil::restore_signal_handler_once()?;
-            Ok(code)
-        })
-        .or_else(|err| Ok(Err(err))) // pass back error to caller
-        .map(|res| result_tx.send(res).unwrap());
-    tokio::run(fut);
-    result_rx.wait().unwrap_or(Err(io::Error::new(
-        io::ErrorKind::Other,
-        "no exit code set",
-    )))
+    let mut handler = ChgUiHandler::new();
+    let mut client = loc.connect().await?;
+    client
+        .attach_io(&io::stdin(), &io::stdout(), &io::stderr())
+        .await?;
+    client.set_umask(umask).await?;
+    let pid = client.server_spec().process_id.unwrap();
+    let pgid = client.server_spec().process_group_id;
+    procutil::setup_signal_handler_once(pid, pgid)?;
+    let code = client
+        .run_command_chg(&mut handler, env::args_os().skip(1))
+        .await?;
+    procutil::restore_signal_handler_once()?;
+    handler.wait_pager().await?;
+    Ok(code)
 }
--- a/rust/chg/src/runcommand.rs	Thu Apr 23 09:59:38 2020 +0200
+++ b/rust/chg/src/runcommand.rs	Fri Apr 24 15:06:42 2020 -0400
@@ -6,164 +6,56 @@
 //! Functions to run Mercurial command in cHg-aware command server.
 
 use bytes::Bytes;
-use futures::future::IntoFuture;
-use futures::{Async, Future, Poll};
 use std::io;
-use std::mem;
 use std::os::unix::io::AsRawFd;
 use tokio_hglib::codec::ChannelMessage;
-use tokio_hglib::protocol::MessageLoop;
-use tokio_hglib::{Client, Connection};
+use tokio_hglib::{Connection, Protocol};
 
-use crate::attachio::AttachIo;
+use crate::attachio;
 use crate::message::{self, CommandType};
 use crate::uihandler::SystemHandler;
 
-enum AsyncS<R, S> {
-    Ready(R),
-    NotReady(S),
-    PollAgain(S),
-}
-
-enum CommandState<C, H>
-where
-    C: Connection,
-    H: SystemHandler,
-{
-    Running(MessageLoop<C>, H),
-    SpawningPager(Client<C>, <H::SpawnPagerResult as IntoFuture>::Future),
-    AttachingPager(AttachIo<C, io::Stdin, H::PagerStdin, H::PagerStdin>, H),
-    WaitingSystem(Client<C>, <H::RunSystemResult as IntoFuture>::Future),
-    Finished,
-}
-
-type CommandPoll<C, H> = io::Result<AsyncS<(Client<C>, H, i32), CommandState<C, H>>>;
-
-/// Future resolves to `(exit_code, client)`.
-#[must_use = "futures do nothing unless polled"]
-pub struct ChgRunCommand<C, H>
-where
-    C: Connection,
-    H: SystemHandler,
-{
-    state: CommandState<C, H>,
-}
-
-impl<C, H> ChgRunCommand<C, H>
-where
-    C: Connection + AsRawFd,
-    H: SystemHandler,
-{
-    pub fn with_client(client: Client<C>, handler: H, packed_args: Bytes) -> ChgRunCommand<C, H> {
-        let msg_loop = MessageLoop::start_with_args(client, b"runcommand", packed_args);
-        ChgRunCommand {
-            state: CommandState::Running(msg_loop, handler),
-        }
-    }
-}
-
-impl<C, H> Future for ChgRunCommand<C, H>
-where
-    C: Connection + AsRawFd,
-    H: SystemHandler,
-{
-    type Item = (Client<C>, H, i32);
-    type Error = io::Error;
-
-    fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
-        loop {
-            let state = mem::replace(&mut self.state, CommandState::Finished);
-            match state.poll()? {
-                AsyncS::Ready((client, handler, code)) => {
-                    return Ok(Async::Ready((client, handler, code)));
-                }
-                AsyncS::NotReady(newstate) => {
-                    self.state = newstate;
-                    return Ok(Async::NotReady);
-                }
-                AsyncS::PollAgain(newstate) => {
-                    self.state = newstate;
-                }
-            }
-        }
-    }
-}
-
-impl<C, H> CommandState<C, H>
-where
-    C: Connection + AsRawFd,
-    H: SystemHandler,
-{
-    fn poll(self) -> CommandPoll<C, H> {
-        match self {
-            CommandState::Running(mut msg_loop, handler) => {
-                if let Async::Ready((client, msg)) = msg_loop.poll()? {
-                    process_message(client, handler, msg)
-                } else {
-                    Ok(AsyncS::NotReady(CommandState::Running(msg_loop, handler)))
-                }
-            }
-            CommandState::SpawningPager(client, mut fut) => {
-                if let Async::Ready((handler, pin)) = fut.poll()? {
-                    let fut = AttachIo::with_client(client, io::stdin(), pin, None);
-                    Ok(AsyncS::PollAgain(CommandState::AttachingPager(
-                        fut, handler,
-                    )))
-                } else {
-                    Ok(AsyncS::NotReady(CommandState::SpawningPager(client, fut)))
-                }
-            }
-            CommandState::AttachingPager(mut fut, handler) => {
-                if let Async::Ready(client) = fut.poll()? {
-                    let msg_loop = MessageLoop::start(client, b""); // terminator
-                    Ok(AsyncS::PollAgain(CommandState::Running(msg_loop, handler)))
-                } else {
-                    Ok(AsyncS::NotReady(CommandState::AttachingPager(fut, handler)))
-                }
-            }
-            CommandState::WaitingSystem(client, mut fut) => {
-                if let Async::Ready((handler, code)) = fut.poll()? {
-                    let data = message::pack_result_code(code);
-                    let msg_loop = MessageLoop::resume_with_data(client, data);
-                    Ok(AsyncS::PollAgain(CommandState::Running(msg_loop, handler)))
-                } else {
-                    Ok(AsyncS::NotReady(CommandState::WaitingSystem(client, fut)))
-                }
-            }
-            CommandState::Finished => panic!("poll ChgRunCommand after it's done"),
-        }
-    }
-}
-
-fn process_message<C, H>(client: Client<C>, handler: H, msg: ChannelMessage) -> CommandPoll<C, H>
-where
-    C: Connection,
-    H: SystemHandler,
-{
-    {
-        match msg {
+/// Runs the given Mercurial command in cHg-aware command server, and
+/// fetches the result code.
+///
+/// This is a subset of tokio-hglib's `run_command()` with the additional
+/// SystemRequest support.
+pub async fn run_command(
+    proto: &mut Protocol<impl Connection + AsRawFd>,
+    handler: &mut impl SystemHandler,
+    packed_args: impl Into<Bytes>,
+) -> io::Result<i32> {
+    proto
+        .send_command_with_args("runcommand", packed_args)
+        .await?;
+    loop {
+        match proto.fetch_response().await? {
             ChannelMessage::Data(b'r', data) => {
-                let code = message::parse_result_code(data)?;
-                Ok(AsyncS::Ready((client, handler, code)))
+                return message::parse_result_code(data);
             }
             ChannelMessage::Data(..) => {
                 // just ignores data sent to optional channel
-                let msg_loop = MessageLoop::resume(client);
-                Ok(AsyncS::PollAgain(CommandState::Running(msg_loop, handler)))
             }
-            ChannelMessage::InputRequest(..) | ChannelMessage::LineRequest(..) => Err(
-                io::Error::new(io::ErrorKind::InvalidData, "unsupported request"),
-            ),
+            ChannelMessage::InputRequest(..) | ChannelMessage::LineRequest(..) => {
+                return Err(io::Error::new(
+                    io::ErrorKind::InvalidData,
+                    "unsupported request",
+                ));
+            }
             ChannelMessage::SystemRequest(data) => {
                 let (cmd_type, cmd_spec) = message::parse_command_spec(data)?;
                 match cmd_type {
                     CommandType::Pager => {
-                        let fut = handler.spawn_pager(cmd_spec).into_future();
-                        Ok(AsyncS::PollAgain(CommandState::SpawningPager(client, fut)))
+                        // server spins new command loop while pager request is
+                        // in progress, which can be terminated by "" command.
+                        let pin = handler.spawn_pager(&cmd_spec).await?;
+                        attachio::attach_io(proto, &io::stdin(), &pin, &pin).await?;
+                        proto.send_command("").await?; // terminator
                     }
                     CommandType::System => {
-                        let fut = handler.run_system(cmd_spec).into_future();
-                        Ok(AsyncS::PollAgain(CommandState::WaitingSystem(client, fut)))
+                        let code = handler.run_system(&cmd_spec).await?;
+                        let data = message::pack_result_code(code);
+                        proto.send_data(data).await?;
                     }
                 }
             }
--- a/rust/chg/src/uihandler.rs	Thu Apr 23 09:59:38 2020 +0200
+++ b/rust/chg/src/uihandler.rs	Fri Apr 24 15:06:42 2020 -0400
@@ -3,76 +3,75 @@
 // This software may be used and distributed according to the terms of the
 // GNU General Public License version 2 or any later version.
 
-use futures::future::IntoFuture;
-use futures::Future;
+use async_trait::async_trait;
 use std::io;
 use std::os::unix::io::AsRawFd;
 use std::os::unix::process::ExitStatusExt;
-use std::process::{Command, Stdio};
+use std::process::Stdio;
 use tokio;
-use tokio_process::{ChildStdin, CommandExt};
+use tokio::process::{Child, ChildStdin, Command};
 
 use crate::message::CommandSpec;
 use crate::procutil;
 
 /// Callback to process shell command requests received from server.
-pub trait SystemHandler: Sized {
+#[async_trait]
+pub trait SystemHandler {
     type PagerStdin: AsRawFd;
-    type SpawnPagerResult: IntoFuture<Item = (Self, Self::PagerStdin), Error = io::Error>;
-    type RunSystemResult: IntoFuture<Item = (Self, i32), Error = io::Error>;
 
     /// Handles pager command request.
     ///
     /// Returns the pipe to be attached to the server if the pager is spawned.
-    fn spawn_pager(self, spec: CommandSpec) -> Self::SpawnPagerResult;
+    async fn spawn_pager(&mut self, spec: &CommandSpec) -> io::Result<Self::PagerStdin>;
 
     /// Handles system command request.
     ///
     /// Returns command exit code (positive) or signal number (negative).
-    fn run_system(self, spec: CommandSpec) -> Self::RunSystemResult;
+    async fn run_system(&mut self, spec: &CommandSpec) -> io::Result<i32>;
 }
 
 /// Default cHg implementation to process requests received from server.
-pub struct ChgUiHandler {}
+pub struct ChgUiHandler {
+    pager: Option<Child>,
+}
 
 impl ChgUiHandler {
     pub fn new() -> ChgUiHandler {
-        ChgUiHandler {}
+        ChgUiHandler { pager: None }
+    }
+
+    /// Waits until the pager process exits.
+    pub async fn wait_pager(&mut self) -> io::Result<()> {
+        if let Some(p) = self.pager.take() {
+            p.await?;
+        }
+        Ok(())
     }
 }
 
+#[async_trait]
 impl SystemHandler for ChgUiHandler {
     type PagerStdin = ChildStdin;
-    type SpawnPagerResult = io::Result<(Self, Self::PagerStdin)>;
-    type RunSystemResult = Box<dyn Future<Item = (Self, i32), Error = io::Error> + Send>;
 
-    fn spawn_pager(self, spec: CommandSpec) -> Self::SpawnPagerResult {
-        let mut pager = new_shell_command(&spec)
-            .stdin(Stdio::piped())
-            .spawn_async()?;
-        let pin = pager.stdin().take().unwrap();
+    async fn spawn_pager(&mut self, spec: &CommandSpec) -> io::Result<Self::PagerStdin> {
+        let mut pager = new_shell_command(&spec).stdin(Stdio::piped()).spawn()?;
+        let pin = pager.stdin.take().unwrap();
         procutil::set_blocking_fd(pin.as_raw_fd())?;
         // TODO: if pager exits, notify the server with SIGPIPE immediately.
         // otherwise the server won't get SIGPIPE if it does not write
         // anything. (issue5278)
         // kill(peerpid, SIGPIPE);
-        tokio::spawn(pager.map(|_| ()).map_err(|_| ())); // just ignore errors
-        Ok((self, pin))
+        self.pager = Some(pager);
+        Ok(pin)
     }
 
-    fn run_system(self, spec: CommandSpec) -> Self::RunSystemResult {
-        let fut = new_shell_command(&spec)
-            .spawn_async()
-            .into_future()
-            .flatten()
-            .map(|status| {
-                let code = status
-                    .code()
-                    .or_else(|| status.signal().map(|n| -n))
-                    .expect("either exit code or signal should be set");
-                (self, code)
-            });
-        Box::new(fut)
+    async fn run_system(&mut self, spec: &CommandSpec) -> io::Result<i32> {
+        let status = new_shell_command(&spec).spawn()?.await?;
+        let code = status
+            .code()
+            .or_else(|| status.signal().map(|n| -n))
+            .expect("either exit code or signal should be set");
+        Ok(code)
     }
 }
 
--- a/tests/test-check-rust-format.t	Thu Apr 23 09:59:38 2020 +0200
+++ b/tests/test-check-rust-format.t	Fri Apr 24 15:06:42 2020 -0400
@@ -5,5 +5,5 @@
   $ cd "$TESTDIR"/..
   $ RUSTFMT=$(rustup which --toolchain nightly rustfmt)
   $ for f in `testrepohg files 'glob:**/*.rs'` ; do
-  >   $RUSTFMT --check --unstable-features --color=never $f
+  >   $RUSTFMT --check --edition=2018 --unstable-features --color=never $f
   > done
--- a/tests/test-histedit-edit.t	Thu Apr 23 09:59:38 2020 +0200
+++ b/tests/test-histedit-edit.t	Fri Apr 24 15:06:42 2020 -0400
@@ -373,6 +373,7 @@
   transaction abort!
   rollback completed
   note: commit message saved in .hg/last-message.txt
+  note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it
   abort: pretxncommit.unexpectedabort hook exited with status 1
   [255]
   $ cat .hg/last-message.txt
@@ -397,6 +398,7 @@
   transaction abort!
   rollback completed
   note: commit message saved in .hg/last-message.txt
+  note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it
   abort: pretxncommit.unexpectedabort hook exited with status 1
   [255]
 
--- a/tests/test-mq-qfold.t	Thu Apr 23 09:59:38 2020 +0200
+++ b/tests/test-mq-qfold.t	Fri Apr 24 15:06:42 2020 -0400
@@ -230,6 +230,7 @@
   HG: changed a
   ====
   note: commit message saved in .hg/last-message.txt
+  note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it
   transaction abort!
   rollback completed
   qrefresh interrupted while patch was popped! (revert --all, qpush to recover)
--- a/tests/test-mq-qnew.t	Thu Apr 23 09:59:38 2020 +0200
+++ b/tests/test-mq-qnew.t	Fri Apr 24 15:06:42 2020 -0400
@@ -308,6 +308,7 @@
   transaction abort!
   rollback completed
   note: commit message saved in .hg/last-message.txt
+  note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it
   abort: pretxncommit.unexpectedabort hook exited with status 1
   [255]
   $ cat .hg/last-message.txt
--- a/tests/test-mq-qrefresh-replace-log-message.t	Thu Apr 23 09:59:38 2020 +0200
+++ b/tests/test-mq-qrefresh-replace-log-message.t	Fri Apr 24 15:06:42 2020 -0400
@@ -186,6 +186,7 @@
   HG: added file2
   ====
   note: commit message saved in .hg/last-message.txt
+  note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it
   transaction abort!
   rollback completed
   qrefresh interrupted while patch was popped! (revert --all, qpush to recover)
@@ -229,6 +230,7 @@
   A file2
   ====
   note: commit message saved in .hg/last-message.txt
+  note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it
   transaction abort!
   rollback completed
   qrefresh interrupted while patch was popped! (revert --all, qpush to recover)
--- a/tests/test-rollback.t	Thu Apr 23 09:59:38 2020 +0200
+++ b/tests/test-rollback.t	Fri Apr 24 15:06:42 2020 -0400
@@ -116,6 +116,7 @@
   transaction abort!
   rollback completed
   note: commit message saved in .hg/last-message.txt
+  note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it
   abort: pretxncommit hook exited with status * (glob)
   [255]
   $ cat .hg/last-message.txt
--- a/tests/test-tag.t	Thu Apr 23 09:59:38 2020 +0200
+++ b/tests/test-tag.t	Fri Apr 24 15:06:42 2020 -0400
@@ -323,6 +323,7 @@
   transaction abort!
   rollback completed
   note: commit message saved in .hg/last-message.txt
+  note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it
   abort: pretxncommit.unexpectedabort hook exited with status 1
   [255]
   $ cat .hg/last-message.txt