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361 lines
12 KiB
361 lines
12 KiB
#!/bin/bash
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# Copyright 2012 the V8 project authors. All rights reserved.
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials provided
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# with the distribution.
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# * Neither the name of Google Inc. nor the names of its
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# contributors may be used to endorse or promote products derived
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# from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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########## Global variable definitions
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BRANCHNAME=prepare-merge
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VERSION_FILE="src/version.cc"
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PERSISTFILE_BASENAME=/tmp/v8-merge-to-branch-tempfile
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ALREADY_MERGING_SENTINEL_FILE="$PERSISTFILE_BASENAME-already-merging"
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CHANGELOG_ENTRY_FILE="$PERSISTFILE_BASENAME-changelog-entry"
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PATCH_FILE="$PERSISTFILE_BASENAME-patch"
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COMMITMSG_FILE="$PERSISTFILE_BASENAME-commitmsg"
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COMMITMSG_FILE_COPY="$PERSISTFILE_BASENAME-commitmsg-copy"
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TOUCHED_FILES_FILE="$PERSISTFILE_BASENAME-touched-files"
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TRUNK_REVISION_FILE="$PERSISTFILE_BASENAME-trunkrevision"
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START_STEP=0
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CURRENT_STEP=0
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usage() {
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cat << EOF
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usage: $0 [OPTIONS]... [BRANCH] [REVISION]...
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Performs the necessary steps to merge revisions from bleeding_edge
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to other branches, including trunk.
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OPTIONS:
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-h Show this message
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-s Specify the step where to start work. Default: 0.
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EOF
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}
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########## Function definitions
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die() {
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[[ -n "$1" ]] && echo "Error: $1"
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echo "Exiting."
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exit 1
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}
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confirm() {
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echo -n "$1 [Y/n] "
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read ANSWER
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if [[ -z "$ANSWER" || "$ANSWER" == "Y" || "$ANSWER" == "y" ]] ; then
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return 0
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else
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return 1
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fi
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}
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delete_branch() {
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local MATCH=$(git branch | grep $1 | awk '{print $NF}' )
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if [ "$MATCH" == "$1" ] ; then
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confirm "Branch $1 exists, do you want to delete it?"
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if [ $? -eq 0 ] ; then
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git branch -D $1 || die "Deleting branch '$1' failed."
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echo "Branch $1 deleted."
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else
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die "Can't continue. Please delete branch $1 and try again."
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fi
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fi
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}
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# Persist and restore variables to support canceling/resuming execution
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# of this script.
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persist() {
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local VARNAME=$1
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local FILE="$PERSISTFILE_BASENAME-$VARNAME"
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echo "${!VARNAME}" > $FILE
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}
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restore() {
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local VARNAME=$1
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local FILE="$PERSISTFILE_BASENAME-$VARNAME"
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local VALUE="$(cat $FILE)"
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eval "$VARNAME=\"$VALUE\""
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}
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restore_if_unset() {
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local VARNAME=$1
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[[ -z "${!VARNAME}" ]] && restore "$VARNAME"
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[[ -z "${!VARNAME}" ]] && die "Variable '$VARNAME' could not be restored."
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}
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persist_patch_commit_hashes() {
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local FILE="$PERSISTFILE_BASENAME-PATCH_COMMIT_HASHES"
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echo "PATCH_COMMIT_HASHES=( ${PATCH_COMMIT_HASHES[@]} )" > $FILE
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}
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restore_patch_commit_hashes() {
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local FILE="$PERSISTFILE_BASENAME-PATCH_COMMIT_HASHES"
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source $FILE
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}
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restore_patch_commit_hashes_if_unset() {
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[[ "${#PATCH_COMMIT_HASHES[@]}" == 0 ]] && restore_patch_commit_hashes
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[[ "${#PATCH_COMMIT_HASHES[@]}" == 0 ]] && \
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die "Variable PATCH_COMMIT_HASHES could not be restored."
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}
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########## Option parsing
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while getopts ":hs:f" OPTION ; do
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case $OPTION in
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h) usage
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exit 0
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;;
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f) rm -f "$ALREADY_MERGING_SENTINEL_FILE"
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;;
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s) START_STEP=$OPTARG
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;;
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?) echo "Illegal option: -$OPTARG"
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usage
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exit 1
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;;
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esac
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done
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let OPTION_COUNT=$OPTIND-1
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shift $OPTION_COUNT
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########## Regular workflow
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# If there is a merge in progress, abort.
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[[ -e "$ALREADY_MERGING_SENTINEL_FILE" ]] && [[ -z "$START_STEP" ]] \
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&& die "A merge is already in progress"
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touch "$ALREADY_MERGING_SENTINEL_FILE"
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# Cancel if this is not a git checkout.
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[[ -d .git ]] \
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|| die "This is not a git checkout, this script won't work for you."
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# Cancel if EDITOR is unset or not executable.
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[[ -n "$EDITOR" && -x "$(which $EDITOR)" ]] \
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|| die "Please set your EDITOR environment variable, you'll need it."
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if [ $START_STEP -le $CURRENT_STEP ] ; then
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MERGE_TO_BRANCH=$1
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[[ -n "$MERGE_TO_BRANCH" ]] \
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|| die "Please specify a branch to merge to"
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shift
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persist "MERGE_TO_BRANCH"
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echo ">>> Step $CURRENT_STEP: Preparation"
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# Check for a clean workdir.
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[[ -z "$(git status -s -uno)" ]] \
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|| die "Workspace is not clean. Please commit or undo your changes."
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# Persist current branch.
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CURRENT_BRANCH=$(git status -s -b -uno | grep "^##" | awk '{print $2}')
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persist "CURRENT_BRANCH"
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delete_branch $BRANCHNAME
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fi
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let CURRENT_STEP+=1
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if [ $START_STEP -le $CURRENT_STEP ] ; then
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echo ">>> Step $CURRENT_STEP: Fetch unfetched revisions."
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git svn fetch || die "'git svn fetch' failed."
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fi
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let CURRENT_STEP+=1
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if [ $START_STEP -le $CURRENT_STEP ] ; then
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restore_if_unset "MERGE_TO_BRANCH"
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echo ">>> Step $CURRENT_STEP: Create a fresh branch for the patch."
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git checkout -b $BRANCHNAME svn/$MERGE_TO_BRANCH \
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|| die "Creating branch $BRANCHNAME failed."
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fi
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let CURRENT_STEP+=1
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if [ $START_STEP -le $CURRENT_STEP ] ; then
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echo ">>> Step $CURRENT_STEP: Find the git \
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revisions associated with the patches."
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current=0
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for REVISION in "$@" ; do
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NEXT_HASH=$(git svn find-rev "r$REVISION" svn/bleeding_edge)
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[[ -n "$NEXT_HASH" ]] \
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|| die "Cannot determine git hash for r$REVISION"
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PATCH_COMMIT_HASHES[$current]="$NEXT_HASH"
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[[ -n "$NEW_COMMIT_MSG" ]] && NEW_COMMIT_MSG="$NEW_COMMIT_MSG,"
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NEW_COMMIT_MSG="$NEW_COMMIT_MSG r$REVISION"
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let current+=1
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done
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NEW_COMMIT_MSG="Merged$NEW_COMMIT_MSG into $MERGE_TO_BRANCH branch."
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echo "$NEW_COMMIT_MSG" > $COMMITMSG_FILE
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echo >> $COMMITMSG_FILE
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for HASH in ${PATCH_COMMIT_HASHES[@]} ; do
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PATCH_MERGE_DESCRIPTION=$(git log -1 --format=%s $HASH)
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echo "$PATCH_MERGE_DESCRIPTION" >> $COMMITMSG_FILE
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echo >> $COMMITMSG_FILE
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done
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for HASH in ${PATCH_COMMIT_HASHES[@]} ; do
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BUG=$(git log -1 $HASH | grep "BUG=" | awk -F '=' '{print $NF}')
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if [ $BUG ] ; then
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if [ "$BUG_AGGREGATE" ] ; then
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BUG_AGGREGATE="$BUG_AGGREGATE,"
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fi
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BUG_AGGREGATE="$BUG_AGGREGATE$BUG"
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fi
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done
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if [ "$BUG_AGGREGATE" ] ; then
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echo "BUG=$BUG_AGGREGATE" >> $COMMITMSG_FILE
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fi
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persist "NEW_COMMIT_MSG"
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persist_patch_commit_hashes
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fi
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let CURRENT_STEP+=1
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if [ $START_STEP -le $CURRENT_STEP ] ; then
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restore_if_unset "MERGE_TO_BRANCH"
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restore_patch_commit_hashes_if_unset "PATCH_COMMIT_HASHES"
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echo "${PATCH_COMMIT_HASHES[@]}"
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echo ">>> Step $CURRENT_STEP: Apply patches for selected revisions."
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rm -f "$TOUCHED_FILES_FILE"
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for HASH in ${PATCH_COMMIT_HASHES[@]} ; do
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git log -1 -p $HASH | patch -p1 \
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| tee >(awk '{print $NF}' >> "$TOUCHED_FILES_FILE")
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[[ $? -eq 0 ]] \
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|| die "Cannot apply the patch for $HASH to $MERGE_TO_BRANCH."
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done
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# Stage added and modified files.
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TOUCHED_FILES=$(cat "$TOUCHED_FILES_FILE")
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for FILE in $TOUCHED_FILES ; do
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git add "$FILE"
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done
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# Stage deleted files.
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DELETED_FILES=$(git status -s -uno --porcelain | grep "^ D" \
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| awk '{print $NF}')
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for FILE in $DELETED_FILES ; do
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git rm "$FILE"
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done
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rm -f "$TOUCHED_FILES_FILE"
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fi
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let CURRENT_STEP+=1
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if [ $START_STEP -le $CURRENT_STEP ] ; then
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echo ">>> Step $CURRENT_STEP: Prepare version.cc"
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# These version numbers are used again for creating the tag
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PATCH=$(grep "#define PATCH_LEVEL" "$VERSION_FILE" | awk '{print $NF}')
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persist "PATCH"
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fi
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let CURRENT_STEP+=1
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if [ $START_STEP -le $CURRENT_STEP ] ; then
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echo ">>> Step $CURRENT_STEP: Increment version number."
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restore_if_unset "PATCH"
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NEWPATCH=$(($PATCH + 1))
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confirm "Automatically increment PATCH_LEVEL? (Saying 'n' will fire up \
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your EDITOR on $VERSION_FILE so you can make arbitrary changes. When \
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you're done, save the file and exit your EDITOR.)"
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if [ $? -eq 0 ] ; then
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sed -e "/#define PATCH_LEVEL/s/[0-9]*$/$NEWPATCH/" \
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-i "$VERSION_FILE"
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else
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$EDITOR "$VERSION_FILE"
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fi
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NEWMAJOR=$(grep "#define MAJOR_VERSION" "$VERSION_FILE" | awk '{print $NF}')
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persist "NEWMAJOR"
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NEWMINOR=$(grep "#define MINOR_VERSION" "$VERSION_FILE" | awk '{print $NF}')
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persist "NEWMINOR"
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NEWBUILD=$(grep "#define BUILD_NUMBER" "$VERSION_FILE" | awk '{print $NF}')
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persist "NEWBUILD"
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NEWPATCH=$(grep "#define PATCH_LEVEL" "$VERSION_FILE" | awk '{print $NF}')
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persist "NEWPATCH"
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fi
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let CURRENT_STEP+=1
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if [ $START_STEP -le $CURRENT_STEP ] ; then
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echo ">>> Step $CURRENT_STEP: Commit to local branch."
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git commit -a -F "$COMMITMSG_FILE" \
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|| die "'git commit -a' failed."
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fi
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let CURRENT_STEP+=1
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if [ $START_STEP -le $CURRENT_STEP ] ; then
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echo ">>> Step $CURRENT_STEP: Upload for code review."
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echo -n "Please enter the email address of a V8 reviewer for your patch: "
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read REVIEWER
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git cl upload -r "$REVIEWER" --send-mail \
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|| die "'git cl upload' failed, please try again."
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fi
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let CURRENT_STEP+=1
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if [ $START_STEP -le $CURRENT_STEP ] ; then
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restore_if_unset "MERGE_TO_BRANCH"
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git checkout $BRANCHNAME \
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|| die "cannot ensure that the current branch is $BRANCHNAME"
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echo ">>> Step $CURRENT_STEP: Commit to the repository."
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echo "Please wait for an LGTM, then type \"LGTM<Return>\" to commit your \
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change. (If you need to iterate on the patch or double check that it's \
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sane, do so in another shell, but remember to not change the headline of \
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the uploaded CL."
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unset ANSWER
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while [ "$ANSWER" != "LGTM" ] ; do
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[[ -n "$ANSWER" ]] && echo "That was not 'LGTM'."
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echo -n "> "
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read ANSWER
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done
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git cl dcommit || die "failed to commit to $MERGE_TO_BRANCH"
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fi
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let CURRENT_STEP+=1
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if [ $START_STEP -le $CURRENT_STEP ] ; then
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restore_if_unset "NEW_COMMIT_MSG"
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restore_if_unset "MERGE_TO_BRANCH"
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echo ">>> Step $CURRENT_STEP: Determine svn commit revision"
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git svn fetch || die "'git svn fetch' failed."
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COMMIT_HASH=$(git log -1 --format=%H --grep="$NEW_COMMIT_MSG" \
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svn/$MERGE_TO_BRANCH)
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[[ -z "$COMMIT_HASH" ]] && die "Unable to map git commit to svn revision"
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SVN_REVISION=$(git svn find-rev $COMMIT_HASH)
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echo "subversion revision number is r$SVN_REVISION"
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persist "SVN_REVISION"
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fi
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let CURRENT_STEP+=1
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if [ $START_STEP -le $CURRENT_STEP ] ; then
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restore_if_unset "SVN_REVISION"
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restore_if_unset "NEWMAJOR"
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restore_if_unset "NEWMINOR"
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restore_if_unset "NEWBUILD"
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restore_if_unset "NEWPATCH"
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echo ">>> Step $CURRENT_STEP: Create the tag."
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echo "Creating tag svn/tags/$NEWMAJOR.$NEWMINOR.$NEWBUILD.$NEWPATCH"
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svn copy -r $SVN_REVISION \
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https://v8.googlecode.com/svn/branches/$MERGE_TO_BRANCH \
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https://v8.googlecode.com/svn/tags/$NEWMAJOR.$NEWMINOR.$NEWBUILD.$NEWPATCH \
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-m "Tagging version $NEWMAJOR.$NEWMINOR.$NEWBUILD.$NEWPATCH"
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fi
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let CURRENT_STEP+=1
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if [ $START_STEP -le $CURRENT_STEP ] ; then
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echo ">>> Step $CURRENT_STEP: Cleanup."
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restore_if_unset "CURRENT_BRANCH"
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git checkout -f $CURRENT_BRANCH
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[[ "$BRANCHNAME" != "$CURRENT_BRANCH" ]] && git branch -D $BRANCHNAME
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rm -f "$ALREADY_MERGING_SENTINEL_FILE"
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fi
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