hgmerge
author Benoit Boissinot <benoit.boissinot@ens-lyon.org>
Thu, 08 Dec 2005 15:12:02 +0100
changeset 1677 11d12bd6e1dc
parent 1434 696851b1bba9
child 1647 64a1169c927d
permissions -rwxr-xr-x
cleanup of revlog.group when repository is local revlog.group cached every chunk from the revlog, the behaviour was needed to minimize the roundtrip with old-http. The patch export the information that the repository is local or not from the repository object down to the revlog. Then it uses the workaround for old-http only if the repository is non-local. The memory used server side when pulling goes down to less than 30Mo maximum whereas without the patch more than 160Mo was used when cloning the linux kernel repository. The time used by cloning is roughly the same (although some caching could be implemented if needed): before 110.25user 20.90system 2:52.00elapsed 76%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+708707minor)pagefaults 0swaps after 112.85user 22.98system 2:50.66elapsed 79%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+862862minor)pagefaults 0swaps
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#!/bin/sh
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#
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# hgmerge - default merge helper for Mercurial
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#
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# This tries to find a way to do three-way merge on the current system.
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# The result ought to end up in $1.
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set -e # bail out quickly on failure
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LOCAL="$1"
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BASE="$2"
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OTHER="$3"
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if [ -z "$EDITOR" ]; then
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    EDITOR="vi"
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fi
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# find decent versions of our utilities, insisting on the GNU versions where we
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# need to
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DIFF3=gdiff3
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DIFF=gdiff
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PATCH=gpatch
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type $DIFF3 >/dev/null 2>&1 || DIFF3=diff3
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type $DIFF  >/dev/null 2>&1 || DIFF=diff
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type $PATCH  >/dev/null 2>&1 || PATCH=patch
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$DIFF3 --version >/dev/null 2>&1 || DIFF3=
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# Back up our file
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cp "$LOCAL" "$LOCAL.orig"
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# Attempt to do a non-interactive merge
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if type merge > /dev/null 2>&1; then
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    merge "$LOCAL" "$BASE" "$OTHER" 2> /dev/null && exit 0
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    cp "$LOCAL.orig" "$LOCAL"
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elif [ -n "$DIFF3" ]; then
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    echo $DIFF3 -m "$LOCAL.orig" "$BASE" "$OTHER"
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    $DIFF3 -m "$LOCAL.orig" "$BASE" "$OTHER" > "$LOCAL" && exit 0
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    if [ $? -eq 2 ]; then
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        echo "$DIFF3 failed! Exiting." 1>&2
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        cp "$LOCAL.orig" "$LOCAL"
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        exit 1
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    fi
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    cp "$LOCAL.orig" "$LOCAL"
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fi
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if [ -n "$DISPLAY" ]; then
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    # try using kdiff3, which is fairly nice
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    if type kdiff3 > /dev/null 2>&1; then
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	kdiff3 --auto "$BASE" "$LOCAL" "$OTHER" -o "$LOCAL" || exit 1
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	exit 0
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    fi
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    # try using tkdiff, which is a bit less sophisticated
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    if type tkdiff > /dev/null 2>&1; then
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	tkdiff "$LOCAL" "$OTHER" -a "$BASE" -o "$LOCAL" || exit 1
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	exit 0
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    fi
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fi
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# Attempt to do a merge with $EDITOR
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if type merge > /dev/null 2>&1; then
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    echo "conflicts detected in $LOCAL"
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    merge "$LOCAL" "$BASE" "$OTHER" 2>/dev/null || $EDITOR "$LOCAL"
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    exit 0
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fi
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if [ -n "$DIFF3" ]; then
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    echo "conflicts detected in $LOCAL"
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    $DIFF3 -m "$LOCAL.orig" "$BASE" "$OTHER" > "$LOCAL" || {
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        case $? in
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            1)
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                $EDITOR "$LOCAL" ;;
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            2)  echo "$DIFF3 failed! Exiting." 1>&2
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                cp "$LOCAL.orig" "$LOCAL"
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                exit 1 ;;
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        esac
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        exit 0
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    }
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fi
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HGTMP=""
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cleanup_exit() {
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    rm -rf "$HGTMP"
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}
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# attempt to manually merge with diff and patch
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if [ -n "$DIFF" -a -n "$PATCH" ]; then
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    # Remove temporary files even if we get interrupted
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    trap "cleanup_exit" 0 # normal exit
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    trap "exit 1" 1 2 3 6 15 # HUP INT QUIT ABRT TERM
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    HGTMP="${TMPDIR-/tmp}/hgmerge.$RANDOM.$RANDOM.$RANDOM.$$"
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    (umask 077 && mkdir "$HGTMP") || {
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	echo "Could not create temporary directory! Exiting." 1>&2
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	exit 1
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    }
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    $DIFF -u "$BASE" "$OTHER" > "$HGTMP/diff" || :
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    if $PATCH "$LOCAL" < "$HGTMP/diff"; then
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	exit 0
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    else
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	# If rejects are empty after using the editor, merge was ok
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	$EDITOR "$LOCAL" "$LOCAL.rej" && test -s "$LOCAL.rej" || exit 0
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    fi
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    exit 1
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fi
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echo "hgmerge: unable to find merge, tkdiff, kdiff3, or diff+patch!"
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exit 1