comparison hgmerge @ 1783:35a05f177267

merge with matt

1782:b9671b41e360

    EDITOR="vi"
fi

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

type $MERGE >/dev/null 2>&1 || MERGE=
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=

# find optional visual utilities
FILEMERGE='/Developer/Applications/Utilities/FileMerge.app/Contents/MacOS/FileMerge'
KDIFF3=kdiff3
TKDIFF=tkdiff

type $FILEMERGE >/dev/null 2>&1 || FILEMERGE=
type $KDIFF3    >/dev/null 2>&1 || KDIFF3=
type $TKDIFF    >/dev/null 2>&1 || TKDIFF=

# random part of names
RAND="$RANDOM.$RANDOM.$RANDOM.$$"

# temporary directory for diff+patch merge
HGTMP="${TMPDIR-/tmp}/hgmerge.$RAND"

# backup file
BACKUP="$LOCAL.orig.$RAND"

# file used to test for file change

    mv "$BACKUP" "$LOCAL"
    cleanup
    exit 1
}

# Clean up when interrupted
trap "failure" 1 2 3 6 15 # HUP INT QUIT ABRT TERM

# Back up our file (and try hard to keep the mtime unchanged)
mv "$LOCAL" "$BACKUP"
cp "$BACKUP" "$LOCAL"

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

# on MacOS X try FileMerge.app, shipped with Apple's developer tools
if [ -n "$FILEMERGE" ]; then
    cp "$BACKUP" "$LOCAL"
    cp "$BACKUP" "$CHGTEST"
    # filemerge prefers the right by default
    $FILEMERGE -left "$OTHER" -right "$LOCAL" -ancestor "$BASE" -merge "$LOCAL"
    [ $? -ne 0 ] && echo "FileMerge failed to launch" && failure
    if test "$LOCAL" -nt "$CHGTEST"
    then
        success
    else
        echo "$LOCAL seems unchanged. Was the merge successful?"
        select answer in yes no
        do
            test "$answer" == "yes" && success || failure
        done
    fi
    failure
fi

if [ -n "$DISPLAY" ]; then
    # try using kdiff3, which is fairly nice
    if [ -n "$KDIFF3" ]; then
	$KDIFF3 --auto "$BASE" "$LOCAL" "$OTHER" -o "$LOCAL" || failure
	success
    fi

    # try using tkdiff, which is a bit less sophisticated
    if [ -n "$TKDIFF" ]; then
	$TKDIFF "$LOCAL" "$OTHER" -a "$BASE" -o "$LOCAL" || failure
	success
    fi
fi

# Attempt to do a merge with $EDITOR
if [ -n "$MERGE" ]; then
    echo "conflicts detected in $LOCAL"
    $MERGE "$LOCAL" "$BASE" "$OTHER" 2>/dev/null || $EDITOR "$LOCAL"
    success
fi

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

# attempt to manually merge with diff and patch
if [ -n "$DIFF" -a -n "$PATCH" ]; then

    (umask 077 && mkdir "$HGTMP") || {
	echo "Could not create temporary directory $HGTMP" 1>&2
	failure
    }

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

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

1783:35a05f177267

    EDITOR="vi"
fi

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

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

# find optional visual utilities
FILEMERGE="/Developer/Applications/Utilities/FileMerge.app/Contents/MacOS/FileMerge"
KDIFF3="kdiff3"
TKDIFF="tkdiff"
MELD="meld"

type "$FILEMERGE" >/dev/null 2>&1 || FILEMERGE=
type "$KDIFF3"    >/dev/null 2>&1 || KDIFF3=
type "$TKDIFF"    >/dev/null 2>&1 || TKDIFF=
type "$MELD"      >/dev/null 2>&1 || MELD=

# random part of names
RAND="$RANDOM$RANDOM"

# temporary directory for diff+patch merge
HGTMP="${TMPDIR-'/tmp'}/hgmerge.$RAND"

# backup file
BACKUP="$LOCAL.orig.$RAND"

# file used to test for file change

    mv "$BACKUP" "$LOCAL"
    cleanup
    exit 1
}

# Ask if the merge was successful
ask_if_merged() {
    while 1; do
        echo "$LOCAL seems unchanged. Was the merge successful? [y/n]"
        read answer
        case answer in
            y*|Y*) success;;
            n*|N*) failure;;
        esac
    done
}

# Clean up when interrupted
trap "failure" 1 2 3 6 15 # HUP INT QUIT ABRT TERM

# Back up our file (and try hard to keep the mtime unchanged)
mv "$LOCAL" "$BACKUP"
cp "$BACKUP" "$LOCAL"

# Attempt to do a non-interactive merge
if [ -n "$MERGE" -o -n "$DIFF3" ]; then
    if [ -n "$MERGE" ]; then
        $MERGE "$LOCAL" "$BASE" "$OTHER" 2> /dev/null && success
    elif [ -n "$DIFF3" ]; then
        $DIFF3 -m "$BACKUP" "$BASE" "$OTHER" > "$LOCAL" && success
    fi
    if [ $? -gt 1 ]; then
        echo "automatic merge failed! Exiting." 1>&2
        failure
    fi
fi

# on MacOS X try FileMerge.app, shipped with Apple's developer tools
if [ -n "$FILEMERGE" ]; then
    cp "$BACKUP" "$LOCAL"
    cp "$BACKUP" "$CHGTEST"
    # filemerge prefers the right by default
    $FILEMERGE -left "$OTHER" -right "$LOCAL" -ancestor "$BASE" -merge "$LOCAL"
    [ $? -ne 0 ] && echo "FileMerge failed to launch" && failure
    test "$LOCAL" -nt "$CHGTEST" && success || ask_if_merged
fi

if [ -n "$DISPLAY" ]; then
    # try using kdiff3, which is fairly nice
    if [ -n "$KDIFF3" ]; then
        $KDIFF3 --auto "$BASE" "$LOCAL" "$OTHER" -o "$LOCAL" || failure
        success
    fi

    # try using tkdiff, which is a bit less sophisticated
    if [ -n "$TKDIFF" ]; then
        $TKDIFF "$LOCAL" "$OTHER" -a "$BASE" -o "$LOCAL" || failure
        success
    fi

    if [ -n "$MELD" ]; then
        cp "$BACKUP" "$CHGTEST"
        # protect our feet - meld allows us to save to the left file
        cp "$BACKUP" "$LOCAL.tmp.$RAND"
        # Meld doesn't have automatic merging, so to reduce intervention
        # use the file with conflicts
        $MELD "$LOCAL.tmp.$RAND" "$LOCAL" "$OTHER" || failure
        # Also it doesn't return good error code
        test "$LOCAL" -nt "$CHGTEST" && success || ask_if_merged
    fi
fi

# Attempt to do a merge with $EDITOR
if [ -n "$MERGE" -o -n "$DIFF3" ]; then
    echo "conflicts detected in $LOCAL"
    cp "$BACKUP" "$CHGTEST"
    $EDITOR "$LOCAL" || failure
    # Some editors do not return meaningful error codes
    # Do not take any chances
    test "$LOCAL" -nt "$CHGTEST" && success || ask_if_merged
fi

# attempt to manually merge with diff and patch
if [ -n "$DIFF" -a -n "$PATCH" ]; then

    (umask 077 && mkdir "$HGTMP") || {
        echo "Could not create temporary directory $HGTMP" 1>&2
        failure
    }

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

echo
echo "hgmerge: unable to find any merge utility!"
echo "supported programs:"
echo "merge, FileMerge, tkdiff, kdiff3, meld, diff+patch"
echo
failure