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#
# This is an example of using HGEDITOR to automate the signing of
# commits and so on.

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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
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    exec $EDITOR "$1"
else
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    T1=`mktemp`; T2=`mktemp`

    # Add manifest hash in order to sign whole repository state.
    # Remove HG: prefix, as we want that to be stored.
    grep '^HG: manifest hash' "$1" | cut -b 5- >> "$T1"
    # Add all other state information
    grep -v '^HG: manifest hash' "$1" >> "$T1"
    (
        cd "`hg root`"
        grep '^HG: changed' "$1" | cut -b 13- | while read changed; do
            hg diff "$changed" >> "$T2"
        done
    )
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    CHECKSUM=`md5sum "$T1"`
    $EDITOR "$T1" "$T2" || cleanup_exit $?
    echo "$CHECKSUM" | md5sum -c --status && cleanup_exit 13
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        echo
        grep -v "^HG:" "$T1" | gpg -t -a -u "${HGUSER:-$EMAIL}" --clearsign
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    } > "$T2" && mv "$T2" "$1"
    cleanup_exit $?