exchangev2: fetch and apply phases data
Now that the server supports emitting phases data, we can request it
and apply it on the client.
Because we may receive phases-only updates from the server, we no
longer conditionally perform the "changesetdata" command depending
on whether there are revisions to fetch. In the previous wire
protocol, this case would result in us falling back to performing
"listkeys" commands to look up phases, bookmarks, etc data. But
since "changesetdata" is smart enough to handle metadata only
fetches, we can keep things consistent.
It's worth noting that because of the unified approach to changeset
data retrieval, phase handling code in wire proto v2 exchange is
drastically simpler. Contrast with all the code in exchange.py
dealing with all the variations for obtaining phases data.
Differential Revision: https://phab.mercurial-scm.org/D4484
$ cat >> $HGRCPATH <<EOF
> [alias]
> tlog = log --template "{rev}:{node|short}: '{desc}' {branches}\n"
> tglog = tlog -G
> tout = out --template "{rev}:{node|short}: '{desc}' {branches}\n"
> EOF
$ hg init a
$ cd a
$ echo a > a
$ hg ci -Aqm0
$ echo foo >> a
$ hg ci -Aqm1
$ hg up -q 0
$ hg branch stable
marked working directory as branch stable
(branches are permanent and global, did you want a bookmark?)
$ echo bar >> a
$ hg ci -qm2
$ hg tglog
@ 2:7bee6c3bea3a: '2' stable
|
| o 1:3560197d8331: '1'
|/
o 0:f7b1eb17ad24: '0'
$ cd ..
$ hg clone -q a#stable b
$ cd b
$ cat .hg/hgrc
# example repository config (see 'hg help config' for more info)
[paths]
default = $TESTTMP/a#stable
# path aliases to other clones of this repo in URLs or filesystem paths
# (see 'hg help config.paths' for more info)
#
# default:pushurl = ssh://jdoe@example.net/hg/jdoes-fork
# my-fork = ssh://jdoe@example.net/hg/jdoes-fork
# my-clone = /home/jdoe/jdoes-clone
[ui]
# name and email (local to this repository, optional), e.g.
# username = Jane Doe <jdoe@example.com>
$ echo red >> a
$ hg ci -qm3
$ hg up -q default
$ echo blue >> a
$ hg ci -qm4
$ hg tglog
@ 3:f0461977a3db: '4'
|
| o 2:1d4099801a4e: '3' stable
| |
| o 1:7bee6c3bea3a: '2' stable
|/
o 0:f7b1eb17ad24: '0'
$ hg tout
comparing with $TESTTMP/a
searching for changes
2:1d4099801a4e: '3' stable
$ hg tlog -r 'outgoing()'
2:1d4099801a4e: '3' stable
$ hg tout ../a#default
comparing with ../a
searching for changes
3:f0461977a3db: '4'
$ hg tlog -r 'outgoing("../a#default")'
3:f0461977a3db: '4'
$ echo "green = ../a#default" >> .hg/hgrc
$ cat .hg/hgrc
# example repository config (see 'hg help config' for more info)
[paths]
default = $TESTTMP/a#stable
# path aliases to other clones of this repo in URLs or filesystem paths
# (see 'hg help config.paths' for more info)
#
# default:pushurl = ssh://jdoe@example.net/hg/jdoes-fork
# my-fork = ssh://jdoe@example.net/hg/jdoes-fork
# my-clone = /home/jdoe/jdoes-clone
[ui]
# name and email (local to this repository, optional), e.g.
# username = Jane Doe <jdoe@example.com>
green = ../a#default
$ hg tout green
abort: repository green does not exist!
[255]
$ hg tlog -r 'outgoing("green")'
abort: repository green does not exist!
[255]
$ cd ..