view hgmerge @ 1555:01a5121a005a

bash_completion: use hg --debug help to get the list of debug commands. Also, try completing with the debug commands only when there's no other candidates. Based on an idea by TK Soh.
author Alexis S. L. Carvalho <alexis@cecm.usp.br>
date Wed, 23 Nov 2005 08:02:35 +0100
parents 696851b1bba9
children 64a1169c927d
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#!/bin/sh
#
# hgmerge - default merge helper for Mercurial
#
# This tries to find a way to do three-way merge on the current system.
# The result ought to end up in $1.

set -e # bail out quickly on failure

LOCAL="$1"
BASE="$2"
OTHER="$3"

if [ -z "$EDITOR" ]; then
    EDITOR="vi"
fi

# find decent versions of our utilities, insisting on the GNU versions where we
# need to
DIFF3=gdiff3
DIFF=gdiff
PATCH=gpatch

type $DIFF3 >/dev/null 2>&1 || DIFF3=diff3
type $DIFF  >/dev/null 2>&1 || DIFF=diff
type $PATCH  >/dev/null 2>&1 || PATCH=patch
$DIFF3 --version >/dev/null 2>&1 || DIFF3=

# Back up our file
cp "$LOCAL" "$LOCAL.orig"

# Attempt to do a non-interactive merge
if type merge > /dev/null 2>&1; then
    merge "$LOCAL" "$BASE" "$OTHER" 2> /dev/null && exit 0
    cp "$LOCAL.orig" "$LOCAL"
elif [ -n "$DIFF3" ]; then
    echo $DIFF3 -m "$LOCAL.orig" "$BASE" "$OTHER"
    $DIFF3 -m "$LOCAL.orig" "$BASE" "$OTHER" > "$LOCAL" && exit 0
    if [ $? -eq 2 ]; then
        echo "$DIFF3 failed! Exiting." 1>&2
        cp "$LOCAL.orig" "$LOCAL"
        exit 1
    fi
    cp "$LOCAL.orig" "$LOCAL"
fi

if [ -n "$DISPLAY" ]; then
    # try using kdiff3, which is fairly nice
    if type kdiff3 > /dev/null 2>&1; then
	kdiff3 --auto "$BASE" "$LOCAL" "$OTHER" -o "$LOCAL" || exit 1
	exit 0
    fi

    # try using tkdiff, which is a bit less sophisticated
    if type tkdiff > /dev/null 2>&1; then
	tkdiff "$LOCAL" "$OTHER" -a "$BASE" -o "$LOCAL" || exit 1
	exit 0
    fi
fi

# Attempt to do a merge with $EDITOR
if type merge > /dev/null 2>&1; then
    echo "conflicts detected in $LOCAL"
    merge "$LOCAL" "$BASE" "$OTHER" 2>/dev/null || $EDITOR "$LOCAL"
    exit 0
fi

if [ -n "$DIFF3" ]; then
    echo "conflicts detected in $LOCAL"
    $DIFF3 -m "$LOCAL.orig" "$BASE" "$OTHER" > "$LOCAL" || {
        case $? in
            1)
                $EDITOR "$LOCAL" ;;
            2)  echo "$DIFF3 failed! Exiting." 1>&2
                cp "$LOCAL.orig" "$LOCAL"
                exit 1 ;;
        esac
        exit 0
    }
fi

HGTMP=""
cleanup_exit() {
    rm -rf "$HGTMP"
}

# attempt to manually merge with diff and patch
if [ -n "$DIFF" -a -n "$PATCH" ]; then
    # Remove temporary files even if we get interrupted
    trap "cleanup_exit" 0 # normal exit
    trap "exit 1" 1 2 3 6 15 # HUP INT QUIT ABRT TERM

    HGTMP="${TMPDIR-/tmp}/hgmerge.$RANDOM.$RANDOM.$RANDOM.$$"
    (umask 077 && mkdir "$HGTMP") || {
	echo "Could not create temporary directory! Exiting." 1>&2
	exit 1
    }

    $DIFF -u "$BASE" "$OTHER" > "$HGTMP/diff" || :
    if $PATCH "$LOCAL" < "$HGTMP/diff"; then
	exit 0
    else
	# If rejects are empty after using the editor, merge was ok
	$EDITOR "$LOCAL" "$LOCAL.rej" && test -s "$LOCAL.rej" || exit 0
    fi
    exit 1
fi

echo "hgmerge: unable to find merge, tkdiff, kdiff3, or diff+patch!"
exit 1