Adding useful scripts to parse revision info.

tools/v8-info.sh

Index: tools/v8-info.sh
diff --git a/tools/v8-info.sh b/tools/v8-info.sh
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+#!/bin/bash
+# Copyright 2013 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
+
+VERSION="src/version.cc"
+MAJOR="MAJOR_VERSION"
+MINOR="MINOR_VERSION"
+BUILD="BUILD_NUMBER"
+PATCH="PATCH_LEVEL"
+
+V8="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+
+########## Function definitions
+
+cd $V8
+
+usage() {
+cat << EOF
+usage: $0 OPTIONS
+
+Fetches V8 revision information from a git-svn checkout.
+
+OPTIONS:
+  -h    Show this message.
+  -i    Print revision info for all branches matching the V8 version.
+  -v    Print the V8 version tag for a trunk SVN revision.
+  -m    Print all patches that were merged to the specified V8 branch.
+  -p    Print all patches merged to a specific V8 point-release.
+EOF
+}
+
+tags() {
+  git for-each-ref --format="%(objectname) %(refname:short)" refs/remotes/svn
+}
+
+tag_revision() {
+  cut -d" " -f1
+}
+
+tag_log() {
+  git log --format="%h %ci %ce %s" -1 $1
+}
+
+v8_hash() {
+  tags | grep "svn/tags/$1$" | tag_revision
+}
+
+point_merges() {
+  echo $1 | grep -o "r[0-9]\+"
+}
+
+hash_to_svn() {
+  git svn log -1 --oneline $1 | cut -d" " -f1
+}
+
+tag_version() {
+  tags | grep svn/tags/$1 | while read tag; do
+    id=$(echo $tag | grep -o "[^/]*$")
+    rev=$(echo $tag | tag_revision)
+    svn=$(hash_to_svn $rev)
+    echo $rev $svn $id
+  done
+}
+
+svn_rev() {
+  git svn find-rev $2 svn/$1
+}
+
+v8_rev() {
+  cd $(git rev-parse --show-toplevel)
+  rev=$(git show $1:$VERSION \
+      | grep "#define" \
+      | grep "$MAJOR\|$MINOR\|$BUILD\|$PATCH" \
+      | grep -o "[0-9]\+$" \
+      | tr "\\n" ".")
+  echo ${rev%?}
+}
+
+merges_to_branch() {
+  git cherry -v svn/trunk svn/$1 | while read merge; do
+    h=$(echo $merge | cut -d" " -f2)
+    svn=$(svn_rev $1 $h)
+    merges=$(echo $merge | grep -o "r[0-9]\+")
+    echo branches/$1 r$svn $merges
+  done
+}
+
+########## Option parsing
+
+while getopts ":hi:v:m:p:" OPTION ; do
+  case $OPTION in
+    h)  usage
+        exit 0
+        ;;
+    i)  tag_version $OPTARG
+        ;;
+    v)  v8_rev $(svn_rev trunk r$OPTARG)
+        ;;
+    m)  merges_to_branch $OPTARG
+        ;;
+    p)  point_merges "$(tag_log $(v8_hash $OPTARG)^1)"
+        ;;
+    ?)  echo "Illegal option: -$OPTARG"
+        usage
+        exit 1
+        ;;
+  esac
+done