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#!/bin/sh
# Copyright 2009 The Go Authors. All rights reserved.
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file.
# This script merges changes from the master copy of the Go library
# into the libgo library. This does the easy stuff; the hard stuff is
# left to the user.
# The file MERGE should hold the Mercurial revision number of the last
# revision which was merged into these sources. Given that, and given
# the current sources, we can run the usual diff3 algorithm to merge
# all changes into our sources.
set -e
TMPDIR=${TMPDIR:-/tmp}
OLDDIR=${TMPDIR}/libgo-merge-old
NEWDIR=${TMPDIR}/libgo-merge-new
if ! test -f MERGE; then
echo 1>&2 "merge.sh: must be run in libgo source directory"
exit 1
fi
if test $# -ne 1; then
echo 1>&2 "merge.sh: Usage: merge.sh mercurial-repository"
exit 1
fi
repository=$1
merge_rev=`sed 1q MERGE`
rm -rf ${OLDDIR}
hg clone -r ${merge_rev} ${repository} ${OLDDIR}
rm -rf ${NEWDIR}
hg clone ${repository} ${NEWDIR}
new_rev=`cd ${NEWDIR} && hg log | sed 1q | sed -e 's/.*://'`
merge() {
name=$1
old=$2
new=$3
libgo=$4
if ! test -f ${new}; then
# The file does not exist in the new version.
if ! test -f ${old}; then
echo 1>&2 "merge.sh internal error no files $old $new"
exit 1
fi
if ! test -f ${libgo}; then
# File removed in new version and libgo.
:;
else
echo "merge.sh: ${name}: REMOVED"
rm -f ${libgo}
hg rm ${libgo}
fi
elif test -f ${old}; then
# The file exists in the old version.
if ! test -f ${libgo}; then
echo "merge.sh: $name: skipping: exists in old and new hg, but not in libgo"
continue
fi
if cmp -s ${old} ${libgo}; then
# The libgo file is unchanged from the old version.
if cmp -s ${new} ${libgo}; then
# File is unchanged from old to new version.
continue
fi
# Update file in libgo.
echo "merge.sh: $name: updating"
cp ${new} ${libgo}
else
# The libgo file has local changes.
set +e
diff3 -m -E ${libgo} ${old} ${new} > ${libgo}.tmp
status=$?
set -e
case $status in
0)
echo "merge.sh: $name: updating"
mv ${libgo}.tmp ${libgo}
;;
1)
echo "merge.sh: $name: CONFLICTS"
mv ${libgo}.tmp ${libgo}
hg resolve -u ${libgo}
;;
*)
echo 1>&2 "merge.sh: $name: diff3 failure"
exit 1
;;
esac
fi
else
# The file does not exist in the old version.
if test -f ${libgo}; then
if ! cmp -s ${new} ${libgo}; then
echo 1>&2 "merge.sh: $name: IN NEW AND LIBGO BUT NOT OLD"
fi
else
echo "merge.sh: $name: NEW"
dir=`dirname ${libgo}`
if ! test -d ${dir}; then
mkdir -p ${dir}
fi
cp ${new} ${libgo}
hg add ${libgo}
fi
fi
}
(cd ${NEWDIR}/src/pkg && find . -name '*.go' -print) | while read f; do
if test `dirname $f` = "./syscall"; then
continue
fi
oldfile=${OLDDIR}/src/pkg/$f
newfile=${NEWDIR}/src/pkg/$f
libgofile=go/$f
merge $f ${oldfile} ${newfile} ${libgofile}
done
(cd ${NEWDIR}/src/pkg && find . -name testdata -print) | while read d; do
oldtd=${OLDDIR}/src/pkg/$d
newtd=${NEWDIR}/src/pkg/$d
libgotd=go/$d
if ! test -d ${oldtd}; then
continue
fi
(cd ${oldtd} && hg status -A .) | while read f; do
if test "`basename $f`" = ".hgignore"; then
continue
fi
f=`echo $f | sed -e 's/^..//'`
name=$d/$f
oldfile=${oldtd}/$f
newfile=${newtd}/$f
libgofile=${libgotd}/$f
merge ${name} ${oldfile} ${newfile} ${libgofile}
done
done
runtime="goc2c.c mcache.c mcentral.c mfinal.c mfixalloc.c mgc0.c mheap.c msize.c malloc.h malloc.goc mprof.goc"
for f in $runtime; do
oldfile=${OLDDIR}/src/pkg/runtime/$f
newfile=${NEWDIR}/src/pkg/runtime/$f
libgofile=runtime/$f
merge $f ${oldfile} ${newfile} ${libgofile}
done
(cd ${OLDDIR}/src/pkg && find . -name '*.go' -print) | while read f; do
oldfile=${OLDDIR}/src/pkg/$f
newfile=${NEWDIR}/src/pkg/$f
libgofile=go/$f
if test -f ${newfile}; then
continue
fi
if ! test -f ${libgofile}; then
continue
fi
echo "merge.sh: ${libgofile}: REMOVED"
rm -f ${libgofile}
hg rm ${libgofile}
done
(echo ${new_rev}; sed -ne '2,$p' MERGE) > MERGE.tmp
mv MERGE.tmp MERGE
|
