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httppeer: implement command executor for version 2 peer...

httppeer: implement command executor for version 2 peer Now that we have a new API for issuing commands which is compatible with wire protocol version 2, we can start using it with wire protocol version 2. This commit replaces our hacky implementation of _call() with something a bit more robust based on the new command executor interface. We now have proper support for issuing multiple commands per HTTP request. Each HTTP request maintains its own client reactor. The implementation is similar to the one in the legacy wire protocol. We use a ThreadPoolExecutor for spinning up a thread to read the HTTP response in the background. This allows responses to resolve in any order. While not implemented on the server yet, a client could use concurrent.futures.as_completed() with a collection of futures and handle responses as they arrive from the server. The return value from issued commands is still a simple list of raw or decoded CBOR data. This is still super hacky. We will want a rich data type for representing command responses. But at least this commit gets us one step closer to a proper peer implementation. Differential Revision: https://phab.mercurial-scm.org/D3297

Johan Bjork - - Load All Authors

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        Adrian Buehlmann
    
tests: unify test-journal-exists

              r12205
            
        $ hg init

        $ echo a > a

        $ hg ci -Am0

        adding a

        $ hg -q clone . foo

        $ touch .hg/store/journal

        $ echo foo > a

        $ hg ci -Am0

        Johan Bjork
    
journal: set Abort hint when failing due to an abandoned transaction

              r21274
            
        abort: abandoned transaction found!

        (run 'hg recover' to clean up transaction)

        Matt Mackall
    
tests: add exit codes to unified tests

              r12316
            
        [255]

        Adrian Buehlmann
    
tests: unify test-journal-exists

              r12205
            
        $ hg recover

        rolling back interrupted transaction

        checking changesets

        checking manifests

        crosschecking files in changesets and manifests

        checking files

        1 files, 1 changesets, 1 total revisions

      Check that zero-size journals are correctly aborted:

        Matt Mackall
    
tests: skip tests that require not having root (issue4089)...

              r20008
            
      #if unix-permissions no-root

        Adrian Buehlmann
    
tests: unify test-journal-exists

              r12205
            
        $ hg bundle -qa repo.hg

        $ chmod -w foo/.hg/store/00changelog.i

        $ hg -R foo unbundle repo.hg

        adding changesets

        Mads Kiilerich
    
tests: remove redundant globs...

              r12640
            
        abort: Permission denied: $TESTTMP/foo/.hg/store/.00changelog.i-* (glob)

        Matt Mackall
    
tests: add exit codes to unified tests

              r12316
            
        [255]

        Adrian Buehlmann
    
tests: unify test-journal-exists

              r12205
            
        $ if test -f foo/.hg/store/journal; then echo 'journal exists :-('; fi

        Adrian Buehlmann
    
test-journal-exists: use #if

              r16959
            
      #endif

        Adrian Buehlmann
    
tests: unify test-journal-exists

              r12205

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Adrian Buehlmann tests: unify test-journal-exists	r12205	$ hg init
		$ echo a > a
		$ hg ci -Am0
		adding a

		$ hg -q clone . foo

		$ touch .hg/store/journal

		$ echo foo > a
		$ hg ci -Am0
Johan Bjork journal: set Abort hint when failing due to an abandoned transaction	r21274	abort: abandoned transaction found!
		(run 'hg recover' to clean up transaction)
Matt Mackall tests: add exit codes to unified tests	r12316	[255]
Adrian Buehlmann tests: unify test-journal-exists	r12205
		$ hg recover
		rolling back interrupted transaction
		checking changesets
		checking manifests
		crosschecking files in changesets and manifests
		checking files
		1 files, 1 changesets, 1 total revisions

		Check that zero-size journals are correctly aborted:

Matt Mackall tests: skip tests that require not having root (issue4089)...	r20008	#if unix-permissions no-root
Adrian Buehlmann tests: unify test-journal-exists	r12205	$ hg bundle -qa repo.hg
		$ chmod -w foo/.hg/store/00changelog.i

		$ hg -R foo unbundle repo.hg
		adding changesets
Mads Kiilerich tests: remove redundant globs...	r12640	abort: Permission denied: $TESTTMP/foo/.hg/store/.00changelog.i-* (glob)
Matt Mackall tests: add exit codes to unified tests	r12316	[255]
Adrian Buehlmann tests: unify test-journal-exists	r12205
		$ if test -f foo/.hg/store/journal; then echo 'journal exists :-('; fi
Adrian Buehlmann test-journal-exists: use #if	r16959	#endif
Adrian Buehlmann tests: unify test-journal-exists	r12205