v8: update make-v8.sh to use git

google build tool gclient doesn't support
svn anymore. Updating v8 build script to use
git instead.

PR-URL: #9393
Reviewed By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

Makefile

@@ -112,7 +112,7 @@ cctest: all
 	@out/$(BUILDTYPE)/$@
 
 v8:
-	tools/make-v8.sh v8
+	tools/make-v8.sh
 	$(MAKE) -C deps/v8 $(V8_ARCH).$(BUILDTYPE_LOWER) $(V8_BUILD_OPTIONS)
 
 test: all

tools/make-v8.sh

@@ -1,38 +1,47 @@
 #!/bin/bash
 
-
-git_origin=$(git config --get remote.origin.url | sed 's/.\+[\/:]\([^\/]\+\/[^\/]\+\)$/\1/')
-git_branch=$(git rev-parse --abbrev-ref HEAD)
-v8ver=${1:-v8} #default v8
-svn_prefix=https://github.com
-svn_path="$svn_prefix/$git_origin/branches/$git_branch/deps/$v8ver"
-#svn_path="$git_origin/branches/$git_branch/deps/$v8ver"
-gclient_string="solutions = [{'name': 'v8', 'url': '$svn_path', 'managed': False}]"
+# Get V8 branch from v8/include/v8-version.h
+MAJOR=$(grep V8_MAJOR_VERSION deps/v8/include/v8-version.h | cut -d ' ' -f 3)
+MINOR=$(grep V8_MINOR_VERSION deps/v8/include/v8-version.h | cut -d ' ' -f 3)
+BRANCH=$MAJOR.$MINOR
 
 # clean up if someone presses ctrl-c
 trap cleanup INT
 
 function cleanup() {
   trap - INT
-
   rm .gclient || true
   rm .gclient_entries || true
   rm -rf _bad_scm/ || true
-
-  #if v8ver isn't v8, move the v8 folders
-  #back to what they were
-  if [ "$v8ver" != "v8" ]; then
-    mv v8 $v8ver
-    mv .v8old v8
-  fi
+  find v8 -name ".git" | xargs rm -rf || true
+  echo "git cleanup"
+  git reset --hard HEAD
+  git clean -fdq
+  # unstash local changes
+  git stash pop
   exit 0
 }
 
 cd deps
-echo $gclient_string > .gclient
-if [ "$v8ver" != "v8" ]; then
-  mv v8 .v8old
-  mv $v8ver v8
+# stash local changes
+git stash
+rm -rf v8
+
+echo "Fetching V8 from chromium.googlesource.com"
+fetch v8
+if [ "$?" -ne 0 ]; then
+  echo "V8 fetch failed"
+  exit 1
 fi
+echo "V8 fetched"
+
+cd v8
+
+echo "Checking out branch:$BRANCH"
+git checkout remotes/branch-heads/$BRANCH
+
+echo "Sync dependencies"
 gclient sync
+
+cd ..
 cleanup