#!/bin/bash

#

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

# commits and so on.

T1=""; T2=""

cleanup_exit() {

    rm -f "$T1" "$T2"

    exit $1

}

case "${EDITOR:=vi}" in

    emacs)

        EDITOR="$EDITOR -nw"

        ;;

    gvim|vim)

        EDITOR="$EDITOR -f -o"

        ;;

esac

if grep -q "^HG: merge resolve" "$1" ; then

    # we don't sign merges

    exec $EDITOR "$1"

else

    T1=`mktemp`; T2=`mktemp`

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

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

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

    (

        cd "`hg root`"

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

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

        done

    )

    CHECKSUM=`md5sum "$T1"`

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

    echo "$CHECKSUM" | md5sum -c 2>/dev/null && cleanup_exit 0

    {

        head -1 "$T1"

        echo

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

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

    cleanup_exit $?

fi