Add version number to commit message in merge-to-branch.

tools/merge-to-branch.sh

-#!/bin/bash
-# Copyright 2012 the V8 project authors. All rights reserved.
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-#       notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-#       copyright notice, this list of conditions and the following
-#       disclaimer in the documentation and/or other materials provided
-#       with the distribution.
-#     * Neither the name of Google Inc. nor the names of its
-#       contributors may be used to endorse or promote products derived
-#       from this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-########## Global variable definitions
-
-BRANCHNAME=prepare-merge
-PERSISTFILE_BASENAME=/tmp/v8-merge-to-branch-tempfile
-ALREADY_MERGING_SENTINEL_FILE="$PERSISTFILE_BASENAME-already-merging"
-COMMIT_HASHES_FILE="$PERSISTFILE_BASENAME-PATCH_COMMIT_HASHES"
-TEMPORARY_PATCH_FILE="$PERSISTFILE_BASENAME-temporary-patch"
-
-########## Function definitions
-
-source $(dirname $BASH_SOURCE)/common-includes.sh
-
-usage() {
-cat << EOF
-usage: $0 [OPTIONS]... [BRANCH] [REVISION]...
-
-Performs the necessary steps to merge revisions from bleeding_edge
-to other branches, including trunk.
-
-OPTIONS:
-  -h    Show this message
-  -s    Specify the step where to start work. Default: 0.
-  -p    Specify a patch file to apply as part of the merge
-  -m    Specify a commit message for the patch
-  -r    Reverse specified patches
-EOF
-}
-
-persist_patch_commit_hashes() {
-  echo "PATCH_COMMIT_HASHES=( ${PATCH_COMMIT_HASHES[@]} )" > $COMMIT_HASHES_FILE
-}
-
-restore_patch_commit_hashes() {
-  source $COMMIT_HASHES_FILE
-}
-
-restore_patch_commit_hashes_if_unset() {
-  [[ "${#PATCH_COMMIT_HASHES[@]}" == 0 ]] && restore_patch_commit_hashes
-  [[ "${#PATCH_COMMIT_HASHES[@]}" == 0 ]] && [[ -z "$EXTRA_PATCH" ]] && \
-      die "Variable PATCH_COMMIT_HASHES could not be restored."
-}
-
-########## Option parsing
-REVERT_FROM_BLEEDING_EDGE=0
-
-while getopts ":hs:fp:rm:R" OPTION ; do
-  case $OPTION in
-    h)  usage
-        exit 0
-        ;;
-    p)  EXTRA_PATCH=$OPTARG
-        ;;
-    f)  rm -f "$ALREADY_MERGING_SENTINEL_FILE"
-        ;;
-    r)  REVERSE_PATCH="--reverse"
-        ;;
-    m)  NEW_COMMIT_MSG=$OPTARG
-        ;;
-    s)  START_STEP=$OPTARG
-        ;;
-    R)  REVERSE_PATCH="--reverse"
-        REVERT_FROM_BLEEDING_EDGE=1
-        ;;
-    ?)  echo "Illegal option: -$OPTARG"
-        usage
-        exit 1
-        ;;
-  esac
-done
-let OPTION_COUNT=$OPTIND-1
-shift $OPTION_COUNT
-
-########## Regular workflow
-
-# If there is a merge in progress, abort.
-[[ -e "$ALREADY_MERGING_SENTINEL_FILE" ]] && [[ $START_STEP -eq 0 ]] \
-   && die "A merge is already in progress"
-touch "$ALREADY_MERGING_SENTINEL_FILE"
-
-initial_environment_checks
-
-if [ $START_STEP -le $CURRENT_STEP ] ; then
-  let MIN_EXPECTED_ARGS=2-$REVERT_FROM_BLEEDING_EDGE
-  if [ ${#@} -lt $MIN_EXPECTED_ARGS ] ; then
-    if [ -z "$EXTRA_PATCH" ] ; then
-      die "Either a patch file or revision numbers must be specified"
-    fi
-    if [ -z "$NEW_COMMIT_MSG" ] ; then
-      die "You must specify a merge comment if no patches are specified"
-    fi
-  fi
-  echo ">>> Step $CURRENT_STEP: Preparation"
-  if [ $REVERT_FROM_BLEEDING_EDGE -eq 1 ] ; then
-    MERGE_TO_BRANCH="bleeding_edge"
-  else
-    MERGE_TO_BRANCH=$1
-    [[ -n "$MERGE_TO_BRANCH" ]] || die "Please specify a branch to merge to"
-    shift
-  fi
-  persist "MERGE_TO_BRANCH"
-  common_prepare
-fi
-
-let CURRENT_STEP+=1
-if [ $START_STEP -le $CURRENT_STEP ] ; then
-  echo ">>> Step $CURRENT_STEP: Create a fresh branch for the patch."
-  restore_if_unset "MERGE_TO_BRANCH"
-  git checkout -b $BRANCHNAME svn/$MERGE_TO_BRANCH \
-    || die "Creating branch $BRANCHNAME failed."
-fi
-
-let CURRENT_STEP+=1
-if [ $START_STEP -le $CURRENT_STEP ] ; then
-  echo ">>> Step $CURRENT_STEP: Search for corresponding architecture ports."
-  for REVISION in "$@" ; do
-    # Add the revision to the array if it isn't already added.
-    if  [[ ! "${FULL_REVISION_LIST[@]}" =~ (^| )$REVISION($| ) ]] ; then
-      FULL_REVISION_LIST=("${FULL_REVISION_LIST[@]}" "$REVISION")
-    fi
-    # Search for commits which matches the "Port rXXX" pattern.
-    GIT_HASHES=$(git log svn/bleeding_edge --reverse \
-                 --format=%H --grep="Port r$REVISION")
-    if [ -n "$GIT_HASHES" ]; then
-      while read -r NEXT_GIT_HASH; do
-        NEXT_SVN_REVISION=$(git svn find-rev $NEXT_GIT_HASH svn/bleeding_edge)
-        [[ -n "$NEXT_SVN_REVISION" ]] \
-          || die "Cannot determine svn revision for $NEXT_GIT_HASH"
-        FULL_REVISION_LIST=("${FULL_REVISION_LIST[@]}" "$NEXT_SVN_REVISION")
-        REVISION_TITLE=$(git log -1 --format=%s $NEXT_GIT_HASH)
-        # Is this revision included in the original revision list?
-        if [[ $@ =~ (^| )$NEXT_SVN_REVISION($| ) ]] ; then
-          echo "Found port of r$REVISION -> \
-r$NEXT_SVN_REVISION (already included): $REVISION_TITLE"
-        else
-          echo "Found port of r$REVISION -> \
-r$NEXT_SVN_REVISION: $REVISION_TITLE"
-          PORT_REVISION_LIST=("${PORT_REVISION_LIST[@]}" "$NEXT_SVN_REVISION")
-        fi
-      done <<< "$GIT_HASHES"
-    fi
-  done
-  # Next step expects a list, not an array.
-  FULL_REVISION_LIST="${FULL_REVISION_LIST[@]}"
-  # Do we find any port?
-  if [ ${#PORT_REVISION_LIST[@]} -ne 0 ] ; then
-    confirm "Automatically add corresponding ports (${PORT_REVISION_LIST[*]})?"
-    #: 'n': Restore the original revision list.
-    if [ $? -ne 0 ] ; then
-      FULL_REVISION_LIST="$@"
-    fi
-  fi
-  persist "FULL_REVISION_LIST"
-fi
-
-let CURRENT_STEP+=1
-if [ $START_STEP -le $CURRENT_STEP ] ; then
-  echo ">>> Step $CURRENT_STEP: Find the git \
-revisions associated with the patches."
-  restore_if_unset "FULL_REVISION_LIST"
-  current=0
-  for REVISION in $FULL_REVISION_LIST ; do
-    NEXT_HASH=$(git svn find-rev "r$REVISION" svn/bleeding_edge)
-    [[ -n "$NEXT_HASH" ]] \
-      || die "Cannot determine git hash for r$REVISION"
-    PATCH_COMMIT_HASHES[$current]="$NEXT_HASH"
-    [[ -n "$REVISION_LIST" ]] && REVISION_LIST="$REVISION_LIST,"
-    REVISION_LIST="$REVISION_LIST r$REVISION"
-    let current+=1
-  done
-  if [ -n "$REVISION_LIST" ] ; then
-    if [ -n "$REVERSE_PATCH" ] ; then
-      if [ $REVERT_FROM_BLEEDING_EDGE -eq 0 ] ; then
-        NEW_COMMIT_MSG="Rollback of$REVISION_LIST in $MERGE_TO_BRANCH branch."
-      else
-        NEW_COMMIT_MSG="Revert$REVISION_LIST."
-      fi
-    else
-      NEW_COMMIT_MSG="Merged$REVISION_LIST into $MERGE_TO_BRANCH branch."
-    fi;
-  fi;
-
-  echo "$NEW_COMMIT_MSG" > $COMMITMSG_FILE
-  echo "" >> $COMMITMSG_FILE
-  for HASH in ${PATCH_COMMIT_HASHES[@]} ; do
-    PATCH_MERGE_DESCRIPTION=$(git log -1 --format=%s $HASH)
-    echo "$PATCH_MERGE_DESCRIPTION" >> $COMMITMSG_FILE
-    echo "" >> $COMMITMSG_FILE
-  done
-  for HASH in ${PATCH_COMMIT_HASHES[@]} ; do
-    BUG=$(git log -1 $HASH | grep "BUG=" | awk -F '=' '{print $NF}')
-    if [ -n "$BUG" ] ; then
-      [[ -n "$BUG_AGGREGATE" ]] && BUG_AGGREGATE="$BUG_AGGREGATE,"
-      BUG_AGGREGATE="$BUG_AGGREGATE$BUG"
-    fi
-  done
-  if [ -n "$BUG_AGGREGATE" ] ; then
-    echo "BUG=$BUG_AGGREGATE" >> $COMMITMSG_FILE
-    echo "LOG=N" >> $COMMITMSG_FILE
-  fi
-  persist "NEW_COMMIT_MSG"
-  persist "REVISION_LIST"
-  persist_patch_commit_hashes
-fi
-
-let CURRENT_STEP+=1
-if [ $START_STEP -le $CURRENT_STEP ] ; then
-  echo ">>> Step $CURRENT_STEP: Apply patches for selected revisions."
-  restore_if_unset "MERGE_TO_BRANCH"
-  restore_patch_commit_hashes_if_unset "PATCH_COMMIT_HASHES"
-  for HASH in ${PATCH_COMMIT_HASHES[@]} ; do
-    echo "Applying patch for $HASH to $MERGE_TO_BRANCH..."
-    git log -1 -p $HASH > "$TEMPORARY_PATCH_FILE"
-    apply_patch "$TEMPORARY_PATCH_FILE"
-  done
-  if [ -n "$EXTRA_PATCH" ] ; then
-    apply_patch "$EXTRA_PATCH"
-  fi
-fi
-
-let CURRENT_STEP+=1
-if [ $START_STEP -le $CURRENT_STEP ] && [ $REVERT_FROM_BLEEDING_EDGE -eq 0 ] ; then
-  echo ">>> Step $CURRENT_STEP: Prepare $VERSION_FILE."
-  # These version numbers are used again for creating the tag
-  read_and_persist_version
-fi
-
-let CURRENT_STEP+=1
-if [ $START_STEP -le $CURRENT_STEP ] && [ $REVERT_FROM_BLEEDING_EDGE -eq 0 ] ; then
-  echo ">>> Step $CURRENT_STEP: Increment version number."
-  restore_if_unset "PATCH"
-  NEWPATCH=$(($PATCH + 1))
-  confirm "Automatically increment PATCH_LEVEL? (Saying 'n' will fire up \
-your EDITOR on $VERSION_FILE so you can make arbitrary changes. When \
-you're done, save the file and exit your EDITOR.)"
-  if [ $? -eq 0 ] ; then
-    echo $NEWPATCH $VERSION_FILE
-    sed -e "/#define PATCH_LEVEL/s/[0-9]*$/$NEWPATCH/" \
-        -i.bak "$VERSION_FILE" || die "Could not increment patch level"
-  else
-    $EDITOR "$VERSION_FILE"
-  fi
-  read_and_persist_version "NEW"
-fi
-
-let CURRENT_STEP+=1
-if [ $START_STEP -le $CURRENT_STEP ] ; then
-  echo ">>> Step $CURRENT_STEP: Commit to local branch."
-  git commit -a -F "$COMMITMSG_FILE" \
-    || die "'git commit -a' failed."
-fi
-
-upload_step
-
-let CURRENT_STEP+=1
-if [ $START_STEP -le $CURRENT_STEP ] ; then
-  echo ">>> Step $CURRENT_STEP: Commit to the repository."
-  restore_if_unset "MERGE_TO_BRANCH"
-  git checkout $BRANCHNAME \
-    || die "cannot ensure that the current branch is $BRANCHNAME"
-  wait_for_lgtm
-  PRESUBMIT_TREE_CHECK="skip" git cl presubmit \
-    || die "presubmit failed"
-  PRESUBMIT_TREE_CHECK="skip" git cl dcommit --bypass-hooks \
-    || die "failed to commit to $MERGE_TO_BRANCH"
-fi
-
-let CURRENT_STEP+=1
-if [ $START_STEP -le $CURRENT_STEP ] && [ $REVERT_FROM_BLEEDING_EDGE -eq 0 ] ; then
-  echo ">>> Step $CURRENT_STEP: Determine svn commit revision"
-  restore_if_unset "NEW_COMMIT_MSG"
-  restore_if_unset "MERGE_TO_BRANCH"
-  git svn fetch || die "'git svn fetch' failed."
-  COMMIT_HASH=$(git log -1 --format=%H --grep="$NEW_COMMIT_MSG" \
-    svn/$MERGE_TO_BRANCH)
-  [[ -z "$COMMIT_HASH" ]] && die "Unable to map git commit to svn revision"
-  SVN_REVISION=$(git svn find-rev $COMMIT_HASH)
-  echo "subversion revision number is r$SVN_REVISION"
-  persist "SVN_REVISION"
-fi
-
-let CURRENT_STEP+=1
-if [ $START_STEP -le $CURRENT_STEP ] && [ $REVERT_FROM_BLEEDING_EDGE -eq 0 ] ; then
-  echo ">>> Step $CURRENT_STEP: Create the tag."
-  restore_if_unset "SVN_REVISION"
-  restore_version_if_unset "NEW"
-  echo "Creating tag svn/tags/$NEWMAJOR.$NEWMINOR.$NEWBUILD.$NEWPATCH"
-  if [ "$MERGE_TO_BRANCH" == "trunk" ] ; then
-    TO_URL="$MERGE_TO_BRANCH"
-  else
-    TO_URL="branches/$MERGE_TO_BRANCH"
-  fi
-  svn copy -r $SVN_REVISION \
-    https://v8.googlecode.com/svn/$TO_URL \
-    https://v8.googlecode.com/svn/tags/$NEWMAJOR.$NEWMINOR.$NEWBUILD.$NEWPATCH \
-    -m "Tagging version $NEWMAJOR.$NEWMINOR.$NEWBUILD.$NEWPATCH"
-  persist "TO_URL"
-fi
-
-let CURRENT_STEP+=1
-if [ $START_STEP -le $CURRENT_STEP ] ; then
-  echo ">>> Step $CURRENT_STEP: Cleanup."
-  restore_if_unset "SVN_REVISION"
-  restore_if_unset "TO_URL"
-  restore_if_unset "REVISION_LIST"
-  restore_version_if_unset "NEW"
-  common_cleanup
-  if [ $REVERT_FROM_BLEEDING_EDGE==0 ] ; then
-    echo "*** SUMMARY ***"
-    echo "version: $NEWMAJOR.$NEWMINOR.$NEWBUILD.$NEWPATCH"
-    echo "branch: $TO_URL"
-    echo "svn revision: $SVN_REVISION"
-    [[ -n "$REVISION_LIST" ]] && echo "patches:$REVISION_LIST"
-  fi
-fi