hgeditor

Refactor diffrevs/diffdir into changes

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Hash: SHA1

Refactor diffrevs/diffdir into changes

Add dirstate.changes to replace most of diffdir
Add localrepository.changes to replace diffrevs/diffdir

This code can now efficiently check for changes in single files, and
often without consulting the manifest. This should eventually make 'hg
diff Makefile' in a large project much faster.

This also fixes a bug where 'hg diff -r tip' failed to account for
files that had been added but not committed yet.

manifest hash: 20fde5d4b4cee49a76bcfe50f2dacf58b1f2258b
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#!/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