hgeditor

keyword: make restrict mode False while updating files for rollback

This is a preparation for using 'repo.rollback()' instead of aborting
a current running transaction for "shelve" and "unshelve".

Before this patch, updating files as a part of 'repo.rollback()'
overridden by keyword extension always follows 'restrict' mode of the
command currently executed.

"merge", "unshelve" and so on should be 'restrict'-ed, because keyword
expansion may cause unexpected conflicts at merging while these
commands.

But, if 'repo.rollback()' is invoked while executing 'restrict'-ed
commands, modified files in the working directory are marked as
"CLEAN" unexpectedly by code path below:

        # 'lookup' below is True at updating modified files for rollback
        kwcmd = self.restrict and lookup # kwexpand/kwshrink
            :
                if kwcmd:
                    self.repo.dirstate.normal(f)

On the other hand, "rollback" command isn't 'restrict'-ed, because
rollbacking itself doesn't imply merging.

Therefore, disabling 'restrict' mode while updating files as a part of
'repo.rollback()' regardless of current 'restrict' mode should be
reasonable.

#!/bin/sh
#
# This is an example of using HGEDITOR to create of diff to review the
# changes while commiting.

# If you want to pass your favourite editor some other parameters
# only for Mercurial, modify this:
case "${EDITOR}" in
    "")
        EDITOR="vi"
        ;;
    emacs)
        EDITOR="$EDITOR -nw"
        ;;
    gvim|vim)
        EDITOR="$EDITOR -f -o"
        ;;
esac


HGTMP=""
cleanup_exit() {
    rm -rf "$HGTMP"
}

# Remove temporary files even if we get interrupted
trap "cleanup_exit" 0 # normal exit
trap "exit 255" HUP INT QUIT ABRT TERM

HGTMP=$(mktemp -d ${TMPDIR-/tmp}/hgeditor.XXXXXX)
[ x$HGTMP != x -a -d $HGTMP ] || {
  echo "Could not create temporary directory! Exiting." 1>&2
  exit 1
}

(
    grep '^HG: changed' "$1" | cut -b 13- | while read changed; do
        "$HG" diff "$changed" >> "$HGTMP/diff"
    done
)

cat "$1" > "$HGTMP/msg"

MD5=$(which md5sum 2>/dev/null) || \
    MD5=$(which md5 2>/dev/null)
[ -x "${MD5}" ] && CHECKSUM=`${MD5} "$HGTMP/msg"`
if [ -s "$HGTMP/diff" ]; then
    $EDITOR "$HGTMP/msg" "$HGTMP/diff" || exit $?
else
    $EDITOR "$HGTMP/msg" || exit $?
fi
[ -x "${MD5}" ] && (echo "$CHECKSUM" | ${MD5} -c >/dev/null 2>&1 && exit 13)

mv "$HGTMP/msg" "$1"

exit $?