lock: block signal interrupt while making a lock file
On Windows where symlink isn't supported, util.makelock() could leave an empty
file if interrupted immediately after os.open(). This empty lock never dies
as it has no process id recorded.
ld = os.open(pathname, os.O_CREAT | os.O_WRONLY | os.O_EXCL)
# an interrupt may occur here
os.write(ld, info)
os.close(ld)
This was a long-standing bug of TortoiseHg which runs a command-server and
kills it by CTRL_C_EVENT, reported by random Windows users.
https://bitbucket.org/tortoisehg/thg/issues/4873/#comment-
43591129
At first, I tried to fix makelock() to clean up a stale lock file, which
turned out to be hard because any instructions may be interrupted by a
signal.
ld = None
try:
# CALL_FUNCTION # os.open(...)
# an interrupt may occur here
# STORE_FAST # ld = ...
ld = os.open(pathname, os.O_CREAT | os.O_WRONLY | os.O_EXCL)
os.write(ld, info)
...
return True
except:
if ld:
...
os.unlink(pathname)
return False
So I decided to block signals by temporarily replacing the signal handlers
so makelcok() and held = 1 will never be interrupted.
Many thanks to Fernando Najera for investigating the issue.
#require py3exe
This test helps in keeping a track on which commands we can run on
Python 3 and see what kind of errors are coming up.
The full traceback is hidden to have a stable output.
$ HGBIN=`which hg`
$ for cmd in version debuginstall ; do
> echo $cmd
> $PYTHON3 $HGBIN $cmd 2>&1 2>&1 | tail -1
> done
version
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
debuginstall
no problems detected
#if test-repo
Make a clone so that any features in the developer's .hg/hgrc that
might confuse Python 3 don't break this test. When we can do commit in
Python 3, we'll stop doing this. We use e76ed1e480ef for the clone
because it has different files than 273ce12ad8f1, so we can test both
`files` from dirstate and `files` loaded from a specific revision.
$ hg clone -r e76ed1e480ef "`dirname "$TESTDIR"`" testrepo 2>&1 | tail -1
15 files updated, 0 files merged, 0 files removed, 0 files unresolved
Test using -R, which exercises some URL code:
$ $PYTHON3 $HGBIN -R testrepo files -r 273ce12ad8f1 | tail -1
testrepo/tkmerge
Now prove `hg files` is reading the whole manifest. We have to grep
out some potential warnings that come from hgrc as yet.
$ cd testrepo
$ $PYTHON3 $HGBIN files -r 273ce12ad8f1
.hgignore
PKG-INFO
README
hg
mercurial/__init__.py
mercurial/byterange.py
mercurial/fancyopts.py
mercurial/hg.py
mercurial/mdiff.py
mercurial/revlog.py
mercurial/transaction.py
notes.txt
setup.py
tkmerge
$ $PYTHON3 $HGBIN files -r 273ce12ad8f1 | wc -l
\s*14 (re)
$ $PYTHON3 $HGBIN files | wc -l
\s*15 (re)
Test if log-like commands work:
$ $PYTHON3 $HGBIN tip
changeset: 10:e76ed1e480ef
tag: tip
user: oxymoron@cinder.waste.org
date: Tue May 03 23:37:43 2005 -0800
summary: Fix linking of changeset revs when merging
$ $PYTHON3 $HGBIN log -r0
changeset: 0:9117c6561b0b
user: mpm@selenic.com
date: Tue May 03 13:16:10 2005 -0800
summary: Add back links from file revisions to changeset revisions
$ cd ..
#endif
Test if `hg config` works:
$ $PYTHON3 $HGBIN config
devel.all-warnings=true
devel.default-date=0 0
largefiles.usercache=$TESTTMP/.cache/largefiles
ui.slash=True
ui.interactive=False
ui.mergemarkers=detailed
ui.promptecho=True
web.address=localhost
web.ipv6=False
$ cat > included-hgrc <<EOF
> [extensions]
> babar = imaginary_elephant
> EOF
$ cat >> $HGRCPATH <<EOF
> %include $TESTTMP/included-hgrc
> EOF
$ $PYTHON3 $HGBIN version | tail -1
*** failed to import extension babar from imaginary_elephant: *: 'imaginary_elephant' (glob)
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ rm included-hgrc
$ touch included-hgrc
Test bytes-ness of policy.policy with HGMODULEPOLICY
$ HGMODULEPOLICY=py
$ export HGMODULEPOLICY
$ $PYTHON3 `which hg` debuginstall 2>&1 2>&1 | tail -1
no problems detected
`hg init` can create empty repos
`hg status works fine`
`hg summary` also works!
$ $PYTHON3 `which hg` init py3repo
$ cd py3repo
$ echo "This is the file 'iota'." > iota
$ $PYTHON3 $HGBIN status
? iota
$ $PYTHON3 $HGBIN add iota
$ $PYTHON3 $HGBIN status
A iota
$ hg diff --nodates --git
diff --git a/iota b/iota
new file mode 100644
--- /dev/null
+++ b/iota
@@ -0,0 +1,1 @@
+This is the file 'iota'.
$ $PYTHON3 $HGBIN commit --message 'commit performed in Python 3'
$ $PYTHON3 $HGBIN status
$ mkdir A
$ echo "This is the file 'mu'." > A/mu
$ $PYTHON3 $HGBIN addremove
adding A/mu
$ $PYTHON3 $HGBIN status
A A/mu
$ HGEDITOR='echo message > ' $PYTHON3 $HGBIN commit
$ $PYTHON3 $HGBIN status
$ $PYHON3 $HGBIN summary
parent: 1:e1e9167203d4 tip
message
branch: default
commit: (clean)
update: (current)
phases: 2 draft
Test weird unicode-vs-bytes stuff
$ $PYTHON3 $HGBIN help | egrep -v '^ |^$'
Mercurial Distributed SCM
list of commands:
additional help topics:
(use 'hg help -v' to show built-in aliases and global options)
$ $PYTHON3 $HGBIN help help | egrep -v '^ |^$'
hg help [-ecks] [TOPIC]
show help for a given topic or a help overview
options ([+] can be repeated):
(some details hidden, use --verbose to show complete help)
$ $PYTHON3 $HGBIN help -k notopic
abort: no matches
(try 'hg help' for a list of topics)
[255]
Prove the repo is valid using the Python 2 `hg`:
$ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
2 files, 2 changesets, 2 total revisions
$ hg log
changeset: 1:e1e9167203d4
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: message
changeset: 0:71c96e924262
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: commit performed in Python 3
$ $PYTHON3 $HGBIN log -G
@ changeset: 1:e1e9167203d4
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: message
|
o changeset: 0:71c96e924262
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: commit performed in Python 3
$ $PYTHON3 $HGBIN log -Tjson
[
{
"rev": 1,
"node": "e1e9167203d450ca2f558af628955b5f5afd4489",
"branch": "default",
"phase": "draft",
"user": "test",
"date": [0, 0],
"desc": "message",
"bookmarks": [],
"tags": ["tip"],
"parents": ["71c96e924262969ff0d8d3d695b0f75412ccc3d8"]
},
{
"rev": 0,
"node": "71c96e924262969ff0d8d3d695b0f75412ccc3d8",
"branch": "default",
"phase": "draft",
"user": "test",
"date": [0, 0],
"desc": "commit performed in Python 3",
"bookmarks": [],
"tags": [],
"parents": ["0000000000000000000000000000000000000000"]
}
]
Show that update works now!
$ $PYTHON3 $HGBIN up 0
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ $PYTHON3 $HGBIN identify
71c96e924262
branches and bookmarks also works!
$ $PYTHON3 $HGBIN branches
default 1:e1e9167203d4
$ $PYTHON3 $HGBIN bookmark book
$ $PYTHON3 $HGBIN bookmarks
* book 0:71c96e924262