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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
Martin von Zweigbergk - - Load All Authors

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test-update-branches.t
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/ tests / test-update-branches.t
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# Construct the following history tree:
#
# @ 5:e1bb631146ca b1
# |
# o 4:a4fdb3b883c4 0:b608b9236435 b1
# |
# | o 3:4b57d2520816 1:44592833ba9f
# | |
# | | o 2:063f31070f65
# | |/
# | o 1:44592833ba9f
# |/
# o 0:b608b9236435
$ mkdir b1
$ cd b1
$ hg init
$ echo foo > foo
$ echo zero > a
$ hg init sub
$ echo suba > sub/suba
$ hg --cwd sub ci -Am addsuba
adding suba
$ echo 'sub = sub' > .hgsub
$ hg ci -qAm0
$ echo one > a ; hg ci -m1
$ echo two > a ; hg ci -m2
$ hg up -q 1
$ echo three > a ; hg ci -qm3
$ hg up -q 0
$ hg branch -q b1
$ echo four > a ; hg ci -qm4
$ echo five > a ; hg ci -qm5
Initial repo state:
$ hg log -G --template '{rev}:{node|short} {parents} {branches}\n'
@ 5:ff252e8273df b1
|
o 4:d047485b3896 0:60829823a42a b1
|
| o 3:6efa171f091b 1:0786582aa4b1
| |
| | o 2:bd10386d478c
| |/
| o 1:0786582aa4b1
|/
o 0:60829823a42a
Make sure update doesn't assume b1 is a repository if invoked from outside:
$ cd ..
$ hg update b1
abort: no repository found in '$TESTTMP' (.hg not found)!
[255]
$ cd b1
Test helper functions:
$ revtest () {
> msg=$1
> dirtyflag=$2 # 'clean', 'dirty' or 'dirtysub'
> startrev=$3
> targetrev=$4
> opt=$5
> hg up -qC $startrev
> test $dirtyflag = dirty && echo dirty > foo
> test $dirtyflag = dirtysub && echo dirty > sub/suba
> hg up $opt $targetrev
> hg parent --template 'parent={rev}\n'
> hg stat -S
> }
$ norevtest () {
> msg=$1
> dirtyflag=$2 # 'clean', 'dirty' or 'dirtysub'
> startrev=$3
> opt=$4
> hg up -qC $startrev
> test $dirtyflag = dirty && echo dirty > foo
> test $dirtyflag = dirtysub && echo dirty > sub/suba
> hg up $opt
> hg parent --template 'parent={rev}\n'
> hg stat -S
> }
Test cases are documented in a table in the update function of merge.py.
Cases are run as shown in that table, row by row.
$ norevtest 'none clean linear' clean 4
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=5
$ norevtest 'none clean same' clean 2
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
updated to "bd10386d478c: 2"
1 other heads for branch "default"
parent=2
$ revtest 'none clean linear' clean 1 2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=2
$ revtest 'none clean same' clean 2 3
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=3
$ revtest 'none clean cross' clean 3 4
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=4
$ revtest 'none dirty linear' dirty 1 2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=2
M foo
$ revtest 'none dirtysub linear' dirtysub 1 2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=2
M sub/suba
$ revtest 'none dirty same' dirty 2 3
abort: uncommitted changes
(commit or update --clean to discard changes)
parent=2
M foo
$ revtest 'none dirtysub same' dirtysub 2 3
abort: uncommitted changes
(commit or update --clean to discard changes)
parent=2
M sub/suba
$ revtest 'none dirty cross' dirty 3 4
abort: uncommitted changes
(commit or update --clean to discard changes)
parent=3
M foo
$ norevtest 'none dirty cross' dirty 2
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
updated to "bd10386d478c: 2"
1 other heads for branch "default"
parent=2
M foo
$ revtest 'none dirtysub cross' dirtysub 3 4
abort: uncommitted changes
(commit or update --clean to discard changes)
parent=3
M sub/suba
$ revtest '-C dirty linear' dirty 1 2 -C
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=2
$ revtest '-c dirty linear' dirty 1 2 -c
abort: uncommitted changes
parent=1
M foo
$ revtest '-m dirty linear' dirty 1 2 -m
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=2
M foo
$ revtest '-m dirty cross' dirty 3 4 -m
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=4
M foo
$ revtest '-c dirtysub linear' dirtysub 1 2 -c
abort: uncommitted changes in subrepository "sub"
parent=1
M sub/suba
$ norevtest '-c clean same' clean 2 -c
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
updated to "bd10386d478c: 2"
1 other heads for branch "default"
parent=2
$ revtest '-cC dirty linear' dirty 1 2 -cC
abort: can only specify one of -C/--clean, -c/--check, or -m/--merge
parent=1
M foo
$ revtest '-mc dirty linear' dirty 1 2 -mc
abort: can only specify one of -C/--clean, -c/--check, or -m/--merge
parent=1
M foo
$ revtest '-mC dirty linear' dirty 1 2 -mC
abort: can only specify one of -C/--clean, -c/--check, or -m/--merge
parent=1
M foo
$ echo '[commands]' >> .hg/hgrc
$ echo 'update.check = abort' >> .hg/hgrc
$ revtest 'none dirty linear' dirty 1 2
abort: uncommitted changes
parent=1
M foo
$ revtest 'none dirty linear' dirty 1 2 -c
abort: uncommitted changes
parent=1
M foo
$ revtest 'none dirty linear' dirty 1 2 -C
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=2
$ echo 'update.check = none' >> .hg/hgrc
$ revtest 'none dirty cross' dirty 3 4
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=4
M foo
$ revtest 'none dirty linear' dirty 1 2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=2
M foo
$ revtest 'none dirty linear' dirty 1 2 -c
abort: uncommitted changes
parent=1
M foo
$ revtest 'none dirty linear' dirty 1 2 -C
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=2
$ hg co -qC 3
$ echo dirty >> a
$ hg co --tool :merge3 4
merging a
warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges
[1]
$ hg st
M a
? a.orig
$ cat a
<<<<<<< working copy: 6efa171f091b - test: 3
three
dirty
||||||| base
three
=======
four
>>>>>>> destination: d047485b3896 b1 - test: 4
$ rm a.orig
$ echo 'update.check = noconflict' >> .hg/hgrc
$ revtest 'none dirty cross' dirty 3 4
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=4
M foo
$ revtest 'none dirty linear' dirty 1 2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=2
M foo
$ revtest 'none dirty linear' dirty 1 2 -c
abort: uncommitted changes
parent=1
M foo
$ revtest 'none dirty linear' dirty 1 2 -C
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=2
Locally added file is allowed
$ hg up -qC 3
$ echo a > bar
$ hg add bar
$ hg up -q 4
$ hg st
A bar
$ hg forget bar
$ rm bar
Locally removed file is allowed
$ hg up -qC 3
$ hg rm foo
$ hg up -q 4
File conflict is not allowed
$ hg up -qC 3
$ echo dirty >> a
$ hg up -q 4
abort: conflicting changes
(commit or update --clean to discard changes)
[255]
$ hg up -m 4
merging a
warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges
[1]
$ rm a.orig
Change/delete conflict is not allowed
$ hg up -qC 3
$ hg rm foo
$ hg up -q 4
Uses default value of "linear" when value is misspelled
$ echo 'update.check = linyar' >> .hg/hgrc
$ revtest 'dirty cross' dirty 3 4
abort: uncommitted changes
(commit or update --clean to discard changes)
parent=3
M foo
Setup for later tests
$ revtest 'none dirty linear' dirty 1 2 -c
abort: uncommitted changes
parent=1
M foo
$ cd ..
Test updating to null revision
$ hg init null-repo
$ cd null-repo
$ echo a > a
$ hg add a
$ hg ci -m a
$ hg up -qC 0
$ echo b > b
$ hg add b
$ hg up null
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg st
A b
$ hg up -q 0
$ hg st
A b
$ hg up -qC null
$ hg st
? b
$ cd ..
Test updating with closed head
---------------------------------------------------------------------
$ hg clone -U -q b1 closed-heads
$ cd closed-heads
Test updating if at least one non-closed branch head exists
if on the closed branch head:
- update to "."
- "updated to a closed branch head ...." message is displayed
- "N other heads for ...." message is displayed
$ hg update -q -C 3
$ hg commit --close-branch -m 6
$ norevtest "on closed branch head" clean 6
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
no open descendant heads on branch "default", updating to a closed head
(committing will reopen the head, use 'hg heads .' to see 1 other heads)
parent=6
if descendant non-closed branch head exists, and it is only one branch head:
- update to it, even if its revision is less than closed one
- "N other heads for ...." message isn't displayed
$ norevtest "non-closed 2 should be chosen" clean 1
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=2
if all descendant branch heads are closed, but there is another branch head:
- update to the tipmost descendant head
- "updated to a closed branch head ...." message is displayed
- "N other heads for ...." message is displayed
$ norevtest "all descendant branch heads are closed" clean 3
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
no open descendant heads on branch "default", updating to a closed head
(committing will reopen the head, use 'hg heads .' to see 1 other heads)
parent=6
Test updating if all branch heads are closed
if on the closed branch head:
- update to "."
- "updated to a closed branch head ...." message is displayed
- "all heads of branch ...." message is displayed
$ hg update -q -C 2
$ hg commit --close-branch -m 7
$ norevtest "all heads of branch default are closed" clean 6
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
no open descendant heads on branch "default", updating to a closed head
(committing will reopen branch "default")
parent=6
if not on the closed branch head:
- update to the tipmost descendant (closed) head
- "updated to a closed branch head ...." message is displayed
- "all heads of branch ...." message is displayed
$ norevtest "all heads of branch default are closed" clean 1
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
no open descendant heads on branch "default", updating to a closed head
(committing will reopen branch "default")
parent=7
$ cd ..
Test updating if "default" branch doesn't exist and no revision is
checked out (= "default" is used as current branch)
$ hg init no-default-branch
$ cd no-default-branch
$ hg branch foobar
marked working directory as branch foobar
(branches are permanent and global, did you want a bookmark?)
$ echo a > a
$ hg commit -m "#0" -A
adding a
$ echo 1 >> a
$ hg commit -m "#1"
$ hg update -q 0
$ echo 3 >> a
$ hg commit -m "#2"
created new head
$ hg commit --close-branch -m "#3"
if there is at least one non-closed branch head:
- update to the tipmost branch head
$ norevtest "non-closed 1 should be chosen" clean null
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
parent=1
if all branch heads are closed
- update to "tip"
- "updated to a closed branch head ...." message is displayed
- "all heads for branch "XXXX" are closed" message is displayed
$ hg update -q -C 1
$ hg commit --close-branch -m "#4"
$ norevtest "all branches are closed" clean null
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
no open descendant heads on branch "foobar", updating to a closed head
(committing will reopen branch "foobar")
parent=4
$ cd ../b1
Test obsolescence behavior
---------------------------------------------------------------------
successors should be taken in account when checking head destination
$ cat << EOF >> $HGRCPATH
> [ui]
> logtemplate={rev}:{node|short} {desc|firstline}
> [experimental]
> evolution.createmarkers=True
> EOF
Test no-argument update to a successor of an obsoleted changeset
$ hg log -G
o 5:ff252e8273df 5
|
o 4:d047485b3896 4
|
| o 3:6efa171f091b 3
| |
| | o 2:bd10386d478c 2
| |/
| @ 1:0786582aa4b1 1
|/
o 0:60829823a42a 0
$ hg book bm -r 3
$ hg status
M foo
We add simple obsolescence marker between 3 and 4 (indirect successors)
$ hg id --debug -i -r 3
6efa171f091b00a3c35edc15d48c52a498929953
$ hg id --debug -i -r 4
d047485b3896813b2a624e86201983520f003206
$ hg debugobsolete 6efa171f091b00a3c35edc15d48c52a498929953 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
obsoleted 1 changesets
$ hg debugobsolete aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa d047485b3896813b2a624e86201983520f003206
Test that 5 is detected as a valid destination from 3 and also accepts moving
the bookmark (issue4015)
$ hg up --quiet --hidden 3
$ hg up 5
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg book bm
moving bookmark 'bm' forward from 6efa171f091b
$ hg bookmarks
* bm 5:ff252e8273df
Test that we abort before we warn about the hidden commit if the working
directory is dirty
$ echo conflict > a
$ hg up --hidden 3
abort: uncommitted changes
(commit or update --clean to discard changes)
[255]
Test that we still warn also when there are conflicts
$ hg up -m --hidden 3
merging a
warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges
(leaving bookmark bm)
updated to hidden changeset 6efa171f091b
(hidden revision '6efa171f091b' was rewritten as: d047485b3896)
[1]
$ hg revert -r . a
$ hg resolve -m
(no more unresolved files)
Test that 4 is detected as the no-argument destination from 3 and also moves
the bookmark with it
$ hg up --quiet 0 # we should be able to update to 3 directly
$ hg up --quiet --hidden 3 # but not implemented yet.
updated to hidden changeset 6efa171f091b
(hidden revision '6efa171f091b' was rewritten as: d047485b3896)
$ hg book -f bm
$ hg up
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
updating bookmark bm
$ hg book
* bm 4:d047485b3896
Test that 5 is detected as a valid destination from 1
$ hg up --quiet 0 # we should be able to update to 3 directly
$ hg up --quiet --hidden 3 # but not implemented yet.
updated to hidden changeset 6efa171f091b
(hidden revision '6efa171f091b' was rewritten as: d047485b3896)
$ hg up 5
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
Test that 5 is not detected as a valid destination from 2
$ hg up --quiet 0
$ hg up --quiet 2
$ hg up 5
abort: uncommitted changes
(commit or update --clean to discard changes)
[255]
Test that we don't crash when updating from a pruned changeset (i.e. has no
successors). Behavior should probably be that we update to the first
non-obsolete parent but that will be decided later.
$ hg id --debug -r 2
bd10386d478cd5a9faf2e604114c8e6da62d3889
$ hg up --quiet 0
$ hg up --quiet 2
$ hg debugobsolete bd10386d478cd5a9faf2e604114c8e6da62d3889
obsoleted 1 changesets
$ hg up
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
Test experimental revset support
$ hg log -r '_destupdate()'
2:bd10386d478c 2 (no-eol)
Test that boolean flags allow --no-flag specification to override [defaults]
$ cat >> $HGRCPATH <<EOF
> [defaults]
> update = --check
> EOF
$ hg co 2
abort: uncommitted changes
[255]
$ hg co --no-check 2
0 files updated, 0 files merged, 0 files removed, 0 files unresolved