#!/bin/sh

#

# This is an example of using HGEDITOR to automate the signing of

# commits and so on.

# change this to one to turn on GPG support

SIGN=0

# 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" 1 2 3 6 15 # HUP INT QUIT ABRT TERM

HGTMP="${TMPDIR-/tmp}/hgeditor.$RANDOM.$RANDOM.$RANDOM.$$"

(umask 077 && mkdir "$HGTMP") || {

    echo "Could not create temporary directory! Exiting." 1>&2

    exit 1

}

(

    cd "`hg root`"

    grep '^HG: changed' "$1" | cut -b 13- | while read changed; do

        hg diff "$changed" >> "$HGTMP/diff"

    done

)

echo > "$HGTMP/msg"

if [ "$SIGN" == "1" ]; then

    MANIFEST=`grep '^HG: manifest hash' "$1" | cut -b 19-`

    echo -e "\nmanifest hash: $MANIFEST" >> "$HGTMP/msg"

fi

grep -vE '^(HG: manifest hash .*)?$' "$1" >> "$HGTMP/msg"

CHECKSUM=`md5sum "$HGTMP/msg"`

if [ -s "$HGTMP/diff" ]; then

    $EDITOR "$HGTMP/msg" "$HGTMP/diff" || exit $?

else

    $EDITOR "$HGTMP/msg" || exit $?

fi

echo "$CHECKSUM" | md5sum -c >/dev/null 2>&1 && exit 13

if [ "$SIGN" == "1" ]; then

    {

        head -n 1 "$HGTMP/msg"

        echo

        grep -v "^HG:" "$HGTMP/msg" | gpg -t -a -u "${HGUSER}" --clearsign

    } > "$HGTMP/msg.gpg" && mv "$HGTMP/msg.gpg" "$1"

else

    mv "$HGTMP/msg" "$1"

fi

exit $?