view hgeditor @ 46370:7289eac777ec stable

hooks: introduce a `:run-with-plain` option for hooks

This option control if HGPLAIN should be set or not for the hooks. This is the
first step to give user some control of the HGPLAIN setting for they hooks.

Some hooks (eg: consistency checking) deserve to be run with HGPLAIN, some other
(eg: user set visual helper) might need to respect the user config and setting.

So both usage are valid and we need to restore the ability to run -without-
HGPLAIN that got lost in Mercurial 5.7.

This does not offer a way to restore the pre-5.7 behavior yet (respect whatever
HGPLAIN setting from the shell), this will be dealt with in the next changeset.

The option name is a bit verbose because implementing this highlighs the need
for another option: `:run-if-plain`. That would make it possible for some hooks
to be easily disabled if HG PLAIN is set. However such option would be a new
feature, not something introduced to mitigate a behavior change introduced in
5.7, so the `:run-if-plain` option belong to the default branch and is not part
of this series.

Differential Revision: https://phab.mercurial-scm.org/D9981

#!/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 $?