repository: define new interface for running commands
Today, the peer interface exposes methods for each command that can
be executed. In addition, there is an iterbatch() API that allows
commands to be issued in batches and provides an iterator over the
results. This is a glorified wrapper around the "batch" wire command.
Wire protocol version 2 supports nicer things (such as batching
any command and out-of-order replies). It will require a more
flexible API for executing commands.
This commit introduces a new peer interface for making command
requests. In the new world, you can't simply call a method on the
peer to execute a command: you need to obtain an object to be used
for executing commands. That object can be used to issue a single
command or it can batch multiple requests. In the case of full duplex
peers, the command may even be sent out over the wire immediately.
There are no per-command methods. Instead, there is a generic
method to call a command. The implementation can then perform domain
specific processing for specific commands. This includes passing
data via a specially named argument.
Arguments are also passed as a dictionary instead of using **kwargs.
While **kwargs is nicer to use, we've historically gotten into
trouble using it because there will inevitably be a conflict between
the name of an argument to a wire protocol command and an argument
we want to pass into a function.
Instead of a command returning a value, it returns a future which
will resolve to a value. This opens the door for out-of-order
response handling and concurrent response handling in the version
2 protocol.
Differential Revision: https://phab.mercurial-scm.org/D3267
test merging things outside of the sparse checkout
$ hg init myrepo
$ cd myrepo
$ cat > .hg/hgrc <<EOF
> [extensions]
> sparse=
> EOF
$ echo foo > foo
$ echo bar > bar
$ hg add foo bar
$ hg commit -m initial
$ hg branch feature
marked working directory as branch feature
(branches are permanent and global, did you want a bookmark?)
$ echo bar2 >> bar
$ hg commit -m 'feature - bar2'
$ hg update -q default
$ hg debugsparse --exclude 'bar**'
$ hg merge feature
temporarily included 1 file(s) in the sparse checkout for merging
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
Verify bar was merged temporarily
$ ls
bar
foo
$ hg status
M bar
Verify bar disappears automatically when the working copy becomes clean
$ hg commit -m "merged"
cleaned up 1 temporarily added file(s) from the sparse checkout
$ hg status
$ ls
foo
$ hg cat -r . bar
bar
bar2
Test merging things outside of the sparse checkout that are not in the working
copy
$ hg strip -q -r . --config extensions.strip=
$ hg up -q feature
$ touch branchonly
$ hg ci -Aqm 'add branchonly'
$ hg up -q default
$ hg debugsparse -X branchonly
$ hg merge feature
temporarily included 2 file(s) in the sparse checkout for merging
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)