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wireprotov2: implement commands as a generator of objects...
wireprotov2: implement commands as a generator of objects Previously, wire protocol version 2 inherited version 1's model of having separate types to represent the results of different wire protocol commands. As I implemented more powerful commands in future commits, I found I was using a common pattern of returning a special type to hold a generator. This meant the command function required a closure to do most of the work. That made logic flow more difficult to follow. I also noticed that many commands were effectively a sequence of objects to be CBOR encoded. I think it makes sense to define version 2 commands as generators. This way, commands can simply emit the data structures they wish to send to the client. This eliminates the need for a closure in command functions and removes encoding from the bodies of commands. As part of this commit, the handling of response objects has been moved into the serverreactor class. This puts the reactor in the driver's seat with regards to CBOR encoding and error handling. Having error handling in the function that emits frames is particularly important because exceptions in that function can lead to things getting in a bad state: I'm fairly certain that uncaught exceptions in the frame generator were causing deadlocks. I also introduced a dedicated error type for explicit error reporting in command handlers. This will be used in subsequent commits. There's still a bit of work to be done here, especially around formalizing the error handling "protocol." I've added yet another TODO to track this so we don't forget. Test output changed because we're using generators and no longer know we are at the end of the data until we hit the end of the generator. This means we can't emit the end-of-stream flag until we've exhausted the generator. Hence the introduction of 0-sized end-of-stream frames. Differential Revision: https://phab.mercurial-scm.org/D4472

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test-mq-symlinks.t
112 lines | 1.8 KiB | text/troff | Tads3Lexer
/ tests / test-mq-symlinks.t
Matt Mackall
tests: replace exit 80 with #require
r22046 #require symlink
Nicolas Dumazet
tests: unify test-mq-symlinks
r11908
$ echo "[extensions]" >> $HGRCPATH
$ echo "mq=" >> $HGRCPATH
$ hg init
$ hg qinit
$ hg qnew base.patch
$ echo aaa > a
$ echo bbb > b
$ echo ccc > c
$ hg add a b c
$ hg qrefresh
Matt Mackall
tests: drop explicit $TESTDIR from executables...
r25472 $ readlink.py a
Nicolas Dumazet
tests: unify test-mq-symlinks
r11908 a -> a not a symlink
test replacing a file with a symlink
$ hg qnew symlink.patch
$ rm a
$ ln -s b a
$ hg qrefresh --git
Matt Mackall
tests: drop explicit $TESTDIR from executables...
r25472 $ readlink.py a
Nicolas Dumazet
tests: unify test-mq-symlinks
r11908 a -> b
$ hg qpop
popping symlink.patch
now at: base.patch
$ hg qpush
applying symlink.patch
now at: symlink.patch
Matt Mackall
tests: drop explicit $TESTDIR from executables...
r25472 $ readlink.py a
Nicolas Dumazet
tests: unify test-mq-symlinks
r11908 a -> b
test updating a symlink
$ rm a
$ ln -s c a
$ hg qnew --git -f updatelink
Matt Mackall
tests: drop explicit $TESTDIR from executables...
r25472 $ readlink.py a
Nicolas Dumazet
tests: unify test-mq-symlinks
r11908 a -> c
$ hg qpop
popping updatelink
now at: symlink.patch
$ hg qpush --debug
applying updatelink
patching file a
Mads Kiilerich
localrepo: show headline notes in commitctx before showing filenames...
r23749 committing files:
Nicolas Dumazet
tests: unify test-mq-symlinks
r11908 a
Mads Kiilerich
localrepo: show headline notes in commitctx before showing filenames...
r23749 committing manifest
committing changelog
Pierre-Yves David
caches: move the 'updating the branch cache' message in 'updatecaches'...
r32267 updating the branch cache
Nicolas Dumazet
tests: unify test-mq-symlinks
r11908 now at: updatelink
Matt Mackall
tests: drop explicit $TESTDIR from executables...
r25472 $ readlink.py a
Nicolas Dumazet
tests: unify test-mq-symlinks
r11908 a -> c
$ hg st
test replacing a symlink with a file
$ ln -s c s
$ hg add s
$ hg qnew --git -f addlink
$ rm s
$ echo sss > s
$ hg qnew --git -f replacelinkwithfile
$ hg qpop
popping replacelinkwithfile
now at: addlink
$ hg qpush
applying replacelinkwithfile
now at: replacelinkwithfile
$ cat s
sss
$ hg st
test symlink removal
$ hg qnew removesl.patch
$ hg rm a
$ hg qrefresh --git
$ hg qpop
popping removesl.patch
now at: replacelinkwithfile
$ hg qpush
applying removesl.patch
now at: removesl.patch
$ hg st -c
C b
C c
C s
Patrick Mezard
Merge with stable
r12345
replace broken symlink with another broken symlink
$ ln -s linka linka
$ hg add linka
$ hg qnew link
$ hg mv linka linkb
Mads Kiilerich
merge with stable
r12398 $ rm linkb
$ ln -s linkb linkb
Patrick Mezard
Merge with stable
r12345 $ hg qnew movelink
$ hg qpop
popping movelink
now at: link
$ hg qpush
applying movelink
now at: movelink
Matt Mackall
tests: drop explicit $TESTDIR from executables...
r25472 $ readlink.py linkb
Patrick Mezard
Merge with stable
r12345 linkb -> linkb