view hgeditor @ 35186:e0a1b9ee93cd

lfs: add a repo requirement for this extension once an lfs file is committed

Largefiles does the same thing (also delayed until the first largefile commit),
to prevent access to the repo without the extension.  In the case of this
extension, not having the extension loaded while accessing an lfs file results
in cryptic errors about "missing processor for flag '0x2000'".  If enabled
locally but not remotely, the cryptic error message is about no common
changegroup version.  (It wants '03', which is currently experimental.)

The largefiles extension looks for any tracked file that starts with '.hglf/'.
Unfortunately, that doesn't work here.  I didn't see any way to get the files
that were just committed, without doing a full status.  But since there's no
secondary check on adding an lfs file once the extension is loaded and a
threshold set, the best practice is to only enable this locally on a repo that
needs it.  That should minimize the unnecessary overhead for repos without an
lfs file.

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

# 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 $?