tests/test-extension

localrepo.commit: grab locks before getting the list of files to commit

Somebody may change the dirstate after we've determined the parents of
the working dir and run repo.status, but before we called wlock().

This should also fix issue997, where backout would change a file without
changing its size and then call repo.commit without passing the list of
files. If this happened in less than one second, we wouldn't detect any
file changes - the in-memory dirstate still has the cached stat data for
that file. Grabbing the wlock early causes the dirstate to be
invalidated and we end up reading the dirstate file again, which has
that file marked for lookup (size == -1).

A better fix would be for backout to give repo.commit the exact list of
files, but that'll require some changes to the revert operation.

A significant user-visible change is that the precommit hook is always
run with both locks grabbed - previously, hg commit would run it before
grabbing any locks, but hg import would run it after grabbing locks.

#!/bin/sh
# Test basic extension support

cat > foobar.py <<EOF
import os
from mercurial import commands

def uisetup(ui):
    ui.write("uisetup called\\n")
    ui.write("ui.parentui is%s None\\n" % (ui.parentui is not None
                                           and "not" or ""))

def reposetup(ui, repo):
    ui.write("reposetup called for %s\\n" % os.path.basename(repo.root))
    ui.write("ui %s= repo.ui\\n" % (ui == repo.ui and "=" or "!"))

def foo(ui, *args, **kwargs):
    ui.write("Foo\\n")

def bar(ui, *args, **kwargs):
    ui.write("Bar\\n")

cmdtable = {
    "foo": (foo, [], "hg foo"),
    "bar": (bar, [], "hg bar"),
}

commands.norepo += ' bar'
EOF
abspath=`pwd`/foobar.py

mkdir barfoo
cp foobar.py barfoo/__init__.py
barfoopath=`pwd`/barfoo

hg init a
cd a
echo foo > file
hg add file
hg commit -m 'add file'

echo '[extensions]' >> $HGRCPATH
echo "foobar = $abspath" >> $HGRCPATH
hg foo

cd ..
hg clone a b

hg bar
echo 'foobar = !' >> $HGRCPATH

echo '% module/__init__.py-style'
echo "barfoo = $barfoopath" >> $HGRCPATH
cd a
hg foo
echo 'barfoo = !' >> $HGRCPATH

cd ..
cat > empty.py <<EOF
'''empty cmdtable
'''
cmdtable = {}
EOF
emptypath=`pwd`/empty.py
echo "empty = $emptypath" >> $HGRCPATH
hg help empty
echo 'empty = !' >> $HGRCPATH

cat > debugextension.py <<EOF
'''only debugcommands
'''
def debugfoobar(ui, repo, *args, **opts):
    "yet another debug command"
    pass

cmdtable = {"debugfoobar": (debugfoobar, (), "hg debugfoobar")}
EOF
debugpath=`pwd`/debugextension.py
echo "debugextension = $debugpath" >> $HGRCPATH
hg help debugextension
hg --debug help debugextension
echo 'debugextension = !' >> $HGRCPATH