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- #!/bin/sh
- # From Gerrit Code Review 2.6-rc0
- #
- # Part of Gerrit Code Review (http://code.google.com/p/gerrit/)
- #
- # Copyright (C) 2009 The Android Open Source Project
- #
- # Licensed under the Apache License, Version 2.0 (the "License");
- # you may not use this file except in compliance with the License.
- # You may obtain a copy of the License at
- #
- # http://www.apache.org/licenses/LICENSE-2.0
- #
- # Unless required by applicable law or agreed to in writing, software
- # distributed under the License is distributed on an "AS IS" BASIS,
- # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- # See the License for the specific language governing permissions and
- # limitations under the License.
- #
- unset GREP_OPTIONS
- CHANGE_ID_AFTER="Bug|Issue"
- MSG="$1"
- # Check for, and add if missing, a unique Change-Id
- #
- add_ChangeId() {
- clean_message=`sed -e '
- /^diff --git a\/.*/{
- s///
- q
- }
- /^Signed-off-by:/d
- /^#/d
- ' "$MSG" | git stripspace`
- if test -z "$clean_message"
- then
- return
- fi
- # Does Change-Id: already exist? if so, exit (no change).
- if grep -i '^Change-Id:' "$MSG" >/dev/null
- then
- return
- fi
- id=`_gen_ChangeId`
- T="$MSG.tmp.$$"
- AWK=awk
- if [ -x /usr/xpg4/bin/awk ]; then
- # Solaris AWK is just too broken
- AWK=/usr/xpg4/bin/awk
- fi
- # How this works:
- # - parse the commit message as (textLine+ blankLine*)*
- # - assume textLine+ to be a footer until proven otherwise
- # - exception: the first block is not footer (as it is the title)
- # - read textLine+ into a variable
- # - then count blankLines
- # - once the next textLine appears, print textLine+ blankLine* as these
- # aren't footer
- # - in END, the last textLine+ block is available for footer parsing
- $AWK '
- BEGIN {
- # while we start with the assumption that textLine+
- # is a footer, the first block is not.
- isFooter = 0
- footerComment = 0
- blankLines = 0
- }
- # Skip lines starting with "#" without any spaces before it.
- /^#/ { next }
- # Skip the line starting with the diff command and everything after it,
- # up to the end of the file, assuming it is only patch data.
- # If more than one line before the diff was empty, strip all but one.
- /^diff --git a/ {
- blankLines = 0
- while (getline) { }
- next
- }
- # Count blank lines outside footer comments
- /^$/ && (footerComment == 0) {
- blankLines++
- next
- }
- # Catch footer comment
- /^\[[a-zA-Z0-9-]+:/ && (isFooter == 1) {
- footerComment = 1
- }
- /]$/ && (footerComment == 1) {
- footerComment = 2
- }
- # We have a non-blank line after blank lines. Handle this.
- (blankLines > 0) {
- print lines
- for (i = 0; i < blankLines; i++) {
- print ""
- }
- lines = ""
- blankLines = 0
- isFooter = 1
- footerComment = 0
- }
- # Detect that the current block is not the footer
- (footerComment == 0) && (!/^\[?[a-zA-Z0-9-]+:/ || /^[a-zA-Z0-9-]+:\/\//) {
- isFooter = 0
- }
- {
- # We need this information about the current last comment line
- if (footerComment == 2) {
- footerComment = 0
- }
- if (lines != "") {
- lines = lines "\n";
- }
- lines = lines $0
- }
- # Footer handling:
- # If the last block is considered a footer, splice in the Change-Id at the
- # right place.
- # Look for the right place to inject Change-Id by considering
- # CHANGE_ID_AFTER. Keys listed in it (case insensitive) come first,
- # then Change-Id, then everything else (eg. Signed-off-by:).
- #
- # Otherwise just print the last block, a new line and the Change-Id as a
- # block of its own.
- END {
- unprinted = 1
- if (isFooter == 0) {
- print lines "\n"
- lines = ""
- }
- changeIdAfter = "^(" tolower("'"$CHANGE_ID_AFTER"'") "):"
- numlines = split(lines, footer, "\n")
- for (line = 1; line <= numlines; line++) {
- if (unprinted && match(tolower(footer[line]), changeIdAfter) != 1) {
- unprinted = 0
- print "Change-Id: I'"$id"'"
- }
- print footer[line]
- }
- if (unprinted) {
- print "Change-Id: I'"$id"'"
- }
- }' "$MSG" > "$T" && mv "$T" "$MSG" || rm -f "$T"
- }
- _gen_ChangeIdInput() {
- echo "tree `git write-tree`"
- if parent=`git rev-parse "HEAD^0" 2>/dev/null`
- then
- echo "parent $parent"
- fi
- echo "author `git var GIT_AUTHOR_IDENT`"
- echo "committer `git var GIT_COMMITTER_IDENT`"
- echo
- printf '%s' "$clean_message"
- }
- _gen_ChangeId() {
- _gen_ChangeIdInput |
- git hash-object -t commit --stdin
- }
- add_ChangeId
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