Teach walk code about absolute paths.
The first consequence of this is that absolute and relative paths now
all work in the same way. The second is that paths that lie outside
the repository now cause an error to be reported, instead of something
arbitrary and expensive being done.
Internally, all of the serious work is in the util package. The new
canonpath function takes an arbitrary path and either returns a
canonical path or raises an error. Because it needs to know where the
repository root is, it must be fed a repository or dirstate object, which
has given commands.matchpats and friends a new parameter to pass along.
The util.matcher function uses this to canonicalise globs and relative
path names.
Meanwhile, I've moved the Abort exception from commands to util, and
killed off the redundant util.CommandError exception.
#!/bin/sh
#
# hgmerge - default merge helper for Mercurial
#
# This tries to find a way to do three-way merge on the current system.
# The result ought to end up in $1.
set -e # bail out quickly on failure
LOCAL="$1"
BASE="$2"
OTHER="$3"
if [ -z "$EDITOR" ]; then
EDITOR="vi"
fi
# Back up our file
cp "$LOCAL" "$LOCAL.orig"
# Attempt to do a non-interactive merge
if type merge > /dev/null 2>&1; then
merge "$LOCAL" "$BASE" "$OTHER" 2> /dev/null && exit 0
cp "$LOCAL.orig" "$LOCAL"
elif type diff3 > /dev/null 2>&1; then
diff3 -m "$LOCAL.orig" "$BASE" "$OTHER" > "$LOCAL" && exit 0
cp "$LOCAL.orig" "$LOCAL"
fi
if [ -n "$DISPLAY" ]; then
# try using kdiff3, which is fairly nice
if type kdiff3 > /dev/null 2>&1; then
kdiff3 --auto "$BASE" "$LOCAL" "$OTHER" -o "$LOCAL" || exit 1
exit 0
fi
# try using tkdiff, which is a bit less sophisticated
if type tkdiff > /dev/null 2>&1; then
tkdiff "$LOCAL" "$OTHER" -a "$BASE" -o "$LOCAL" || exit 1
exit 0
fi
fi
# Attempt to do a merge with $EDITOR
if type merge > /dev/null 2>&1; then
echo "conflicts detected in $LOCAL"
merge "$LOCAL" "$BASE" "$OTHER" 2>/dev/null || $EDITOR "$LOCAL"
exit 0
fi
if type diff3 > /dev/null 2>&1; then
echo "conflicts detected in $LOCAL"
diff3 -m "$LOCAL.orig" "$BASE" "$OTHER" > "$LOCAL" || $EDITOR "$LOCAL"
exit 0
fi
HGTMP=""
cleanup_exit() {
rm -rf "$HGTMP"
}
# attempt to manually merge with diff and patch
if type diff > /dev/null 2>&1 && type patch > /dev/null 2>&1; then
# Remove temporary files even if we get interrupted
trap "cleanup_exit" 0 # normal exit
trap "exit 1" 1 2 3 6 15 # HUP INT QUIT ABRT TERM
HGTMP="${TMPDIR-/tmp}/hgmerge.$RANDOM.$RANDOM.$RANDOM.$$"
(umask 077 && mkdir "$HGTMP") || {
echo "Could not create temporary directory! Exiting." 1>&2
exit 1
}
diff -u "$BASE" "$OTHER" > "$HGTMP/diff"
if patch "$LOCAL" < "$HGTMP/diff"; then
exit 0
else
# If rejects are empty after using the editor, merge was ok
$EDITOR "$LOCAL" "$LOCAL.rej" && test -s "$LOCAL.rej" || exit 0
fi
exit 1
fi
echo "hgmerge: unable to find merge, tkdiff, kdiff3, or diff+patch!"
exit 1