view hgeditor @ 17770:6c81b8ebf66e

bookmarks: when @ bookmark diverges, don't double the @ sign (BC)

This changeset treats the bookmark "@" as a special case for the naming of
divergent bookmarks, as per the tables below.  For the <no alias> case, the
actual suffix will vary, depending on what suffixes are already in use.

Before:
Bookmark | Remote     | Divergent Bookmark
--------------------------------------
foo      | bar        | foo@bar
foo      | <no alias> | foo@1
@        | bar        | @@bar
@        | <no alias> | @@1

After:
Bookmark | Remote     | Divergent Bookmark
--------------------------------------
foo      | bar        | foo@bar
foo      | <no alias> | foo@1
@        | bar        | @bar
@        | <no alias> | @1

This case is likely to be more common now that 92980a8dfdfe has made the "@"
bookmark have special meaning to clone.

The change in behavior was discussed on the mailing list in the thread below:
http://markmail.org/thread/rwedgxp7le5j2h2f

#!/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 $?