#!/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

T1=""; T2=""

cleanup_exit() {

    rm -f "$T1" "$T2"

    exit $1

}

# If you want to pass your favourite editor some other parameters

# only for Mercurial, modify this:

case "${EDITOR:=vi}" in

    emacs)

        EDITOR="$EDITOR -nw"

        ;;

    gvim|vim)

        EDITOR="$EDITOR -f -o"

        ;;

esac

# Remove temporary files even if we get interrupted

trap "cleanup_exit 255" TERM KILL INT QUIT ABRT

T1=`mktemp`; T2=`mktemp`

(

    cd "`hg root`"

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

        hg diff "$changed" >> "$T2"

    done

)

echo > "$T1"

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

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

    echo -e "\nmanifest hash: $MANIFEST" >> "$T1"

fi

grep -vE '^(HG: manifest hash .*)?$' "$1" >> "$T1"

CHECKSUM=`md5sum "$T1"`

$EDITOR "$T1" "$T2" || cleanup_exit $?

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

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

    {

        head -n 1 "$T1"

        echo

        grep -v "^HG:" "$T1" | gpg -t -a -u "${HGUSER}" --clearsign

    } > "$T2" && mv "$T2" "$1"

else

    mv "$T1" "$1"

fi

cleanup_exit $?