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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
Yuya Nishihara - - Load All Authors

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test-extdiff.t
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$ echo "[extensions]" >> $HGRCPATH
$ echo "extdiff=" >> $HGRCPATH
$ hg init a
$ cd a
$ echo a > a
$ echo b > b
$ hg add
adding a
adding b
Should diff cloned directories:
$ hg extdiff -o -r $opt
Only in a: a
Only in a: b
[1]
$ cat <<EOF >> $HGRCPATH
> [extdiff]
> cmd.falabala = echo
> opts.falabala = diffing
> cmd.edspace = echo
> opts.edspace = "name <user@example.com>"
> EOF
$ hg falabala
diffing a.000000000000 a
[1]
$ hg help falabala
hg falabala [OPTION]... [FILE]...
use external program to diff repository (or selected files)
Show differences between revisions for the specified files, using the
following program:
'echo'
When two revision arguments are given, then changes are shown between
those revisions. If only one revision is specified then that revision is
compared to the working directory, and, when no revisions are specified,
the working directory files are compared to its parent.
options ([+] can be repeated):
-o --option OPT [+] pass option to comparison program
-r --rev REV [+] revision
-c --change REV change made by revision
--patch compare patches for two revisions
-I --include PATTERN [+] include names matching the given patterns
-X --exclude PATTERN [+] exclude names matching the given patterns
-S --subrepos recurse into subrepositories
(some details hidden, use --verbose to show complete help)
$ hg ci -d '0 0' -mtest1
$ echo b >> a
$ hg ci -d '1 0' -mtest2
Should diff cloned files directly:
$ hg falabala -r 0:1
diffing "*\\extdiff.*\\a.8a5febb7f867\\a" "a.34eed99112ab\\a" (glob) (windows !)
diffing */extdiff.*/a.8a5febb7f867/a a.34eed99112ab/a (glob) (no-windows !)
[1]
Specifying an empty revision should abort.
$ hg extdiff -p diff --patch --rev 'ancestor()' --rev 1
abort: empty revision on one side of range
[255]
Test diff during merge:
$ hg update -C 0
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo c >> c
$ hg add c
$ hg ci -m "new branch" -d '1 0'
created new head
$ hg merge 1
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
Should diff cloned file against wc file:
$ hg falabala
diffing "*\\extdiff.*\\a.2a13a4d2da36\\a" "*\\a\\a" (glob) (windows !)
diffing */extdiff.*/a.2a13a4d2da36/a */a/a (glob) (no-windows !)
[1]
Test --change option:
$ hg ci -d '2 0' -mtest3
$ hg falabala -c 1
diffing "*\\extdiff.*\\a.8a5febb7f867\\a" "a.34eed99112ab\\a" (glob) (windows !)
diffing */extdiff.*/a.8a5febb7f867/a a.34eed99112ab/a (glob) (no-windows !)
[1]
Check diff are made from the first parent:
$ hg falabala -c 3 || echo "diff-like tools yield a non-zero exit code"
diffing "*\\extdiff.*\\a.2a13a4d2da36\\a" "a.46c0e4daeb72\\a" (glob) (windows !)
diffing */extdiff.*/a.2a13a4d2da36/a a.46c0e4daeb72/a (glob) (no-windows !)
diff-like tools yield a non-zero exit code
issue3153: ensure using extdiff with removed subrepos doesn't crash:
$ hg init suba
$ cd suba
$ echo suba > suba
$ hg add
adding suba
$ hg ci -m "adding suba file"
$ cd ..
$ echo suba=suba > .hgsub
$ hg add
adding .hgsub
$ hg ci -Sm "adding subrepo"
$ echo > .hgsub
$ hg ci -m "removing subrepo"
$ hg falabala -r 4 -r 5 -S
diffing a.398e36faf9c6 a.5ab95fb166c4
[1]
issue4463: usage of command line configuration without additional quoting
$ cat <<EOF >> $HGRCPATH
> [extdiff]
> cmd.4463a = echo
> opts.4463a = a-naked 'single quoted' "double quoted"
> 4463b = echo b-naked 'single quoted' "double quoted"
> echo =
> EOF
$ hg update -q -C 0
$ echo a >> a
$ hg --debug 4463a | grep '^running'
running 'echo a-naked \'single quoted\' "double quoted" "*\\a" "*\\a"' in */extdiff.* (glob) (windows !)
running 'echo a-naked \'single quoted\' "double quoted" */a $TESTTMP/a/a' in */extdiff.* (glob) (no-windows !)
$ hg --debug 4463b | grep '^running'
running 'echo b-naked \'single quoted\' "double quoted" "*\\a" "*\\a"' in */extdiff.* (glob) (windows !)
running 'echo b-naked \'single quoted\' "double quoted" */a $TESTTMP/a/a' in */extdiff.* (glob) (no-windows !)
$ hg --debug echo | grep '^running'
running '*echo* "*\\a" "*\\a"' in */extdiff.* (glob) (windows !)
running '*echo */a $TESTTMP/a/a' in */extdiff.* (glob) (no-windows !)
(getting options from other than extdiff section)
$ cat <<EOF >> $HGRCPATH
> [extdiff]
> # using diff-tools diffargs
> 4463b2 = echo
> # using merge-tools diffargs
> 4463b3 = echo
> # no diffargs
> 4463b4 = echo
> [diff-tools]
> 4463b2.diffargs = b2-naked 'single quoted' "double quoted"
> [merge-tools]
> 4463b3.diffargs = b3-naked 'single quoted' "double quoted"
> EOF
$ hg --debug 4463b2 | grep '^running'
running 'echo b2-naked \'single quoted\' "double quoted" "*\\a" "*\\a"' in */extdiff.* (glob) (windows !)
running 'echo b2-naked \'single quoted\' "double quoted" */a $TESTTMP/a/a' in */extdiff.* (glob) (no-windows !)
$ hg --debug 4463b3 | grep '^running'
running 'echo b3-naked \'single quoted\' "double quoted" "*\\a" "*\\a"' in */extdiff.* (glob) (windows !)
running 'echo b3-naked \'single quoted\' "double quoted" */a $TESTTMP/a/a' in */extdiff.* (glob) (no-windows !)
$ hg --debug 4463b4 | grep '^running'
running 'echo "*\\a" "*\\a"' in */extdiff.* (glob) (windows !)
running 'echo */a $TESTTMP/a/a' in */extdiff.* (glob) (no-windows !)
$ hg --debug 4463b4 --option b4-naked --option 'being quoted' | grep '^running'
running 'echo b4-naked "being quoted" "*\\a" "*\\a"' in */extdiff.* (glob) (windows !)
running "echo b4-naked 'being quoted' */a $TESTTMP/a/a" in */extdiff.* (glob) (no-windows !)
$ hg --debug extdiff -p echo --option echo-naked --option 'being quoted' | grep '^running'
running 'echo echo-naked "being quoted" "*\\a" "*\\a"' in */extdiff.* (glob) (windows !)
running "echo echo-naked 'being quoted' */a $TESTTMP/a/a" in */extdiff.* (glob) (no-windows !)
$ touch 'sp ace'
$ hg add 'sp ace'
$ hg ci -m 'sp ace'
created new head
$ echo > 'sp ace'
Test pre-72a89cf86fcd backward compatibility with half-baked manual quoting
$ cat <<EOF >> $HGRCPATH
> [extdiff]
> odd =
> [merge-tools]
> odd.diffargs = --foo='\$clabel' '\$clabel' "--bar=\$clabel" "\$clabel"
> odd.executable = echo
> EOF
$ hg --debug odd | grep '^running'
running '"*\\echo.exe" --foo="sp ace" "sp ace" --bar="sp ace" "sp ace"' in * (glob) (windows !)
running "*/echo --foo='sp ace' 'sp ace' --bar='sp ace' 'sp ace'" in * (glob) (no-windows !)
Empty argument must be quoted
$ cat <<EOF >> $HGRCPATH
> [extdiff]
> kdiff3 = echo
> [merge-tools]
> kdiff3.diffargs=--L1 \$plabel1 --L2 \$clabel \$parent \$child
> EOF
$ hg --debug kdiff3 -r0 | grep '^running'
running 'echo --L1 "@0" --L2 "" a.8a5febb7f867 a' in * (glob) (windows !)
running "echo --L1 '@0' --L2 '' a.8a5febb7f867 a" in * (glob) (no-windows !)
Test extdiff of multiple files in tmp dir:
$ hg update -C 0 > /dev/null
$ echo changed > a
$ echo changed > b
#if execbit
$ chmod +x b
#endif
Diff in working directory, before:
$ hg diff --git
diff --git a/a b/a
--- a/a
+++ b/a
@@ -1,1 +1,1 @@
-a
+changed
diff --git a/b b/b
old mode 100644 (execbit !)
new mode 100755 (execbit !)
--- a/b
+++ b/b
@@ -1,1 +1,1 @@
-b
+changed
Edit with extdiff -p:
Prepare custom diff/edit tool:
$ cat > 'diff tool.py' << EOT
> #!$PYTHON
> import time
> time.sleep(1) # avoid unchanged-timestamp problems
> open('a/a', 'ab').write(b'edited\n')
> open('a/b', 'ab').write(b'edited\n')
> EOT
#if execbit
$ chmod +x 'diff tool.py'
#endif
will change to /tmp/extdiff.TMP and populate directories a.TMP and a
and start tool
#if windows
$ cat > 'diff tool.bat' << EOF
> @$PYTHON "`pwd`/diff tool.py"
> EOF
$ hg extdiff -p "`pwd`/diff tool.bat"
[1]
#else
$ hg extdiff -p "`pwd`/diff tool.py"
[1]
#endif
Diff in working directory, after:
$ hg diff --git
diff --git a/a b/a
--- a/a
+++ b/a
@@ -1,1 +1,2 @@
-a
+changed
+edited
diff --git a/b b/b
old mode 100644 (execbit !)
new mode 100755 (execbit !)
--- a/b
+++ b/b
@@ -1,1 +1,2 @@
-b
+changed
+edited
Test extdiff with --option:
$ hg extdiff -p echo -o this -c 1
this "*\\a.8a5febb7f867\\a" "a.34eed99112ab\\a" (glob) (windows !)
this */extdiff.*/a.8a5febb7f867/a a.34eed99112ab/a (glob) (no-windows !)
[1]
$ hg falabala -o this -c 1
diffing this "*\\a.8a5febb7f867\\a" "a.34eed99112ab\\a" (glob) (windows !)
diffing this */extdiff.*/a.8a5febb7f867/a a.34eed99112ab/a (glob) (no-windows !)
[1]
Test extdiff's handling of options with spaces in them:
$ hg edspace -c 1
"name <user@example.com>" "*\\a.8a5febb7f867\\a" "a.34eed99112ab\\a" (glob) (windows !)
name <user@example.com> */extdiff.*/a.8a5febb7f867/a a.34eed99112ab/a (glob) (no-windows !)
[1]
$ hg extdiff -p echo -o "name <user@example.com>" -c 1
"name <user@example.com>" "*\\a.8a5febb7f867\\a" "a.34eed99112ab\\a" (glob) (windows !)
name <user@example.com> */extdiff.*/a.8a5febb7f867/a a.34eed99112ab/a (glob) (no-windows !)
[1]
Test with revsets:
$ hg extdif -p echo -c "rev(1)"
"*\\a.8a5febb7f867\\a" "a.34eed99112ab\\a" (glob) (windows !)
*/extdiff.*/a.8a5febb7f867/a a.34eed99112ab/a (glob) (no-windows !)
[1]
$ hg extdif -p echo -r "0::1"
"*\\a.8a5febb7f867\\a" "a.34eed99112ab\\a" (glob) (windows !)
*/extdiff.*/a.8a5febb7f867/a a.34eed99112ab/a (glob) (no-windows !)
[1]
Fallback to merge-tools.tool.executable|regkey
$ mkdir dir
$ cat > 'dir/tool.sh' << 'EOF'
> #!/bin/sh
> # Mimic a tool that syncs all attrs, including mtime
> cp $1/a $2/a
> touch -r $1/a $2/a
> chmod +x $2/a
> echo "** custom diff **"
> EOF
#if execbit
$ chmod +x dir/tool.sh
#endif
Windows can't run *.sh directly, so create a shim executable that can be.
Without something executable, the next hg command will try to run `tl` instead
of $tool (and fail).
#if windows
$ cat > dir/tool.bat <<EOF
> @sh -c "`pwd`/dir/tool.sh %1 %2"
> EOF
$ tool=`pwd`/dir/tool.bat
#else
$ tool=`pwd`/dir/tool.sh
#endif
$ cat a
changed
edited
$ hg --debug tl --config extdiff.tl= --config merge-tools.tl.executable=$tool
making snapshot of 2 files from rev * (glob)
a
b
making snapshot of 2 files from working directory
a
b
running '$TESTTMP/a/dir/tool.bat a.* a' in */extdiff.* (glob) (windows !)
running '$TESTTMP/a/dir/tool.sh a.* a' in */extdiff.* (glob) (no-windows !)
** custom diff **
file changed while diffing. Overwriting: $TESTTMP/a/a (src: */extdiff.*/a/a) (glob)
cleaning up temp directory
[1]
$ cat a
a
#if execbit
$ [ -x a ]
$ cat > 'dir/tool.sh' << 'EOF'
> #!/bin/sh
> chmod -x $2/a
> echo "** custom diff **"
> EOF
$ hg --debug tl --config extdiff.tl= --config merge-tools.tl.executable=$tool
making snapshot of 2 files from rev * (glob)
a
b
making snapshot of 2 files from working directory
a
b
running '$TESTTMP/a/dir/tool.sh a.* a' in */extdiff.* (glob)
** custom diff **
file changed while diffing. Overwriting: $TESTTMP/a/a (src: */extdiff.*/a/a) (glob)
cleaning up temp directory
[1]
$ [ -x a ]
[1]
#endif
$ cd ..
#if symlink
Test symlinks handling (issue1909)
$ hg init testsymlinks
$ cd testsymlinks
$ echo a > a
$ hg ci -Am adda
adding a
$ echo a >> a
$ ln -s missing linka
$ hg add linka
$ hg falabala -r 0 --traceback
diffing testsymlinks.07f494440405 testsymlinks
[1]
$ cd ..
#endif
Test handling of non-ASCII paths in generated docstrings (issue5301)
>>> with open("u", "wb") as f:
... n = f.write(b"\xa5\xa5")
$ U=`cat u`
$ HGPLAIN=1 hg --config hgext.extdiff= --config extdiff.cmd.td=hi help -k xyzzy
abort: no matches
(try 'hg help' for a list of topics)
[255]
$ HGPLAIN=1 hg --config hgext.extdiff= --config extdiff.cmd.td=hi help td > /dev/null
$ LC_MESSAGES=ja_JP.UTF-8 hg --config hgext.extdiff= --config extdiff.cmd.td=$U help -k xyzzy
abort: no matches
(try 'hg help' for a list of topics)
[255]
$ LC_MESSAGES=ja_JP.UTF-8 hg --config hgext.extdiff= --config extdiff.cmd.td=$U help td \
> | grep "^ '"
'\xa5\xa5'