libgo/merge.sh

   1 #!/bin/sh
   2
   3 # Copyright 2009 The Go Authors. All rights reserved.
   4 # Use of this source code is governed by a BSD-style
   5 # license that can be found in the LICENSE file.
   6
   7 # This script merges changes from the master copy of the Go library
   8 # into the libgo library.  This does the easy stuff; the hard stuff is
   9 # left to the user.
  10
  11 # The file MERGE should hold the Mercurial revision number of the last
  12 # revision which was merged into these sources.  Given that, and given
  13 # the current sources, we can run the usual diff3 algorithm to merge
  14 # all changes into our sources.
  15
  16 set -e
  17
  18 TMPDIR=${TMPDIR:-/tmp}
  19
  20 OLDDIR=${TMPDIR}/libgo-merge-old
  21 NEWDIR=${TMPDIR}/libgo-merge-new
  22
  23 if ! test -f MERGE; then
  24   echo 1>&2 "merge.sh: must be run in libgo source directory"
  25   exit 1
  26 fi
  27
  28 rev=weekly
  29 case $# in
  30 1) ;;
  31 2) rev=$2 ;;
  32 *)
  33   echo 1>&2 "merge.sh: Usage: merge.sh mercurial-repository [revision]"
  34   exit 1
  35   ;;
  36 esac
  37
  38 repository=$1
  39
  40 old_rev=`sed 1q MERGE`
  41
  42 rm -rf ${OLDDIR}
  43 hg clone -r ${old_rev} ${repository} ${OLDDIR}
  44
  45 rm -rf ${NEWDIR}
  46 hg clone -u ${rev} ${repository} ${NEWDIR}
  47
  48 new_rev=`cd ${NEWDIR} && hg log -r ${rev} | sed 1q | sed -e 's/.*://'`
  49
  50 merge() {
  51   name=$1
  52   old=$2
  53   new=$3
  54   libgo=$4
  55   if ! test -f ${new}; then
  56     # The file does not exist in the new version.
  57     if ! test -f ${old}; then
  58       echo 1>&2 "merge.sh internal error no files $old $new"
  59       exit 1
  60     fi
  61     if ! test -f ${libgo}; then
  62       # File removed in new version and libgo.
  63       :;
  64     else
  65       echo "merge.sh: ${name}: REMOVED"
  66       rm -f ${libgo}
  67       hg rm ${libgo}
  68     fi
  69   elif test -f ${old}; then
  70     # The file exists in the old version.
  71     if ! test -f ${libgo}; then
  72       echo "merge.sh: $name: skipping: exists in old and new hg, but not in libgo"
  73       continue
  74     fi
  75     if cmp -s ${old} ${libgo}; then
  76       # The libgo file is unchanged from the old version.
  77       if cmp -s ${new} ${libgo}; then
  78         # File is unchanged from old to new version.
  79         continue
  80       fi
  81       # Update file in libgo.
  82       echo "merge.sh: $name: updating"
  83       cp ${new} ${libgo}
  84     else
  85       # The libgo file has local changes.
  86       set +e
  87       diff3 -m -E ${libgo} ${old} ${new} > ${libgo}.tmp
  88       status=$?
  89       set -e
  90       case $status in
  91       0)
  92         echo "merge.sh: $name: updating"
  93         mv ${libgo}.tmp ${libgo}
  94         ;;
  95       1)
  96         echo "merge.sh: $name: CONFLICTS"
  97         mv ${libgo}.tmp ${libgo}
  98         hg resolve -u ${libgo}
  99         ;;
 100       *)
 101         echo 1>&2 "merge.sh: $name: diff3 failure"
 102         exit 1
 103         ;;
 104       esac
 105     fi
 106   else
 107     # The file does not exist in the old version.
 108     if test -f ${libgo}; then
 109       if ! cmp -s ${new} ${libgo}; then
 110         echo 1>&2 "merge.sh: $name: IN NEW AND LIBGO BUT NOT OLD"
 111       fi
 112     else
 113       echo "merge.sh: $name: NEW"
 114       dir=`dirname ${libgo}`
 115       if ! test -d ${dir}; then
 116         mkdir -p ${dir}
 117       fi
 118       cp ${new} ${libgo}
 119       hg add ${libgo}
 120     fi
 121   fi
 122 }
 123
 124 merge_c() {
 125   from=$1
 126   to=$2
 127   oldfile=${OLDDIR}/src/pkg/runtime/$from
 128   if test -f ${oldfile}; then
 129     sed -e 's/·/_/g' < ${oldfile} > ${oldfile}.tmp
 130     oldfile=${oldfile}.tmp
 131     newfile=${NEWDIR}/src/pkg/runtime/$from
 132     sed -e 's/·/_/g' < ${newfile} > ${newfile}.tmp
 133     newfile=${newfile}.tmp
 134     libgofile=runtime/$to
 135     merge $from ${oldfile} ${newfile} ${libgofile}
 136   fi
 137 }
 138
 139 (cd ${NEWDIR}/src/pkg && find . -name '*.go' -print) | while read f; do
 140   oldfile=${OLDDIR}/src/pkg/$f
 141   newfile=${NEWDIR}/src/pkg/$f
 142   libgofile=go/$f
 143   merge $f ${oldfile} ${newfile} ${libgofile}
 144 done
 145
 146 (cd ${NEWDIR}/src/pkg && find . -name testdata -print) | while read d; do
 147   oldtd=${OLDDIR}/src/pkg/$d
 148   newtd=${NEWDIR}/src/pkg/$d
 149   libgotd=go/$d
 150   if ! test -d ${oldtd}; then
 151     continue
 152   fi
 153   (cd ${oldtd} && hg status -A .) | while read f; do
 154     if test "`basename $f`" = ".hgignore"; then
 155       continue
 156     fi
 157     f=`echo $f | sed -e 's/^..//'`
 158     name=$d/$f
 159     oldfile=${oldtd}/$f
 160     newfile=${newtd}/$f
 161     libgofile=${libgotd}/$f
 162     merge ${name} ${oldfile} ${newfile} ${libgofile}
 163   done
 164 done
 165
 166 runtime="chan.c cpuprof.c lock_futex.c lock_sema.c mcache.c mcentral.c mfinal.c mfixalloc.c mgc0.c mheap.c msize.c panic.c print.c proc.c race.h runtime.c runtime.h signal_unix.c malloc.h malloc.goc mprof.goc parfor.c runtime1.goc sema.goc sigqueue.goc string.goc time.goc"
 167 for f in $runtime; do
 168   merge_c $f $f
 169 done
 170
 171 merge_c thread_linux.c thread-linux.c
 172 merge_c mem_linux.c mem.c
 173
 174 (cd ${OLDDIR}/src/pkg && find . -name '*.go' -print) | while read f; do
 175   oldfile=${OLDDIR}/src/pkg/$f
 176   newfile=${NEWDIR}/src/pkg/$f
 177   libgofile=go/$f
 178   if test -f ${newfile}; then
 179     continue
 180   fi
 181   if ! test -f ${libgofile}; then
 182     continue
 183   fi
 184   echo "merge.sh: ${libgofile}: REMOVED"
 185   rm -f ${libgofile}
 186   hg rm ${libgofile}
 187 done
 188
 189 (echo ${new_rev}; sed -ne '2,$p' MERGE) > MERGE.tmp
 190 mv MERGE.tmp MERGE