Add sample usage / output and -u option

tools/v8-info.sh

Index: tools/v8-info.sh
diff --git a/tools/v8-info.sh b/tools/v8-info.sh
index bb29728b64f5b0d5bfdfe80f2ad347fa4181caee..1f25d147a571ebe8d4c435f6507441c15437cd3c 100755
--- a/tools/v8-info.sh
+++ b/tools/v8-info.sh
@@ -29,6 +29,7 @@
 
 ########## Global variable definitions
 
+BASE_URL="https://code.google.com/p/v8/source/list"
 VERSION="src/version.cc"
 MAJOR="MAJOR_VERSION"
 MINOR="MINOR_VERSION"
@@ -49,10 +50,25 @@ 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.
+          Example usage: $0 -i 3.19.10$
+          Output format: [Git hash] [SVN revision] [V8 version]
+
   -v    Print the V8 version tag for a trunk SVN revision.
+          Example usage: $0 -v 14981
+          Output format: [V8 version]
+
   -m    Print all patches that were merged to the specified V8 branch.
+          Example usage: $0 -m 3.18
+          Output format: [V8 version] [SVN revision] [SVN patch merged]*.
+
   -p    Print all patches merged to a specific V8 point-release.
+          Example usage: $0 -p 3.19.12.1
+          Output format: [SVN patch merged]*
+
+  -u    Print a link to all SVN revisions between two V8 revision tags.
+          Example usage: $0 -u 3.19.10:3.19.11
 EOF
 }
 
@@ -113,9 +129,16 @@ merges_to_branch() {
   done
 }
 
+url_for() {
+  first=$(svn_rev trunk $(v8_hash $(echo $1 | cut -d":" -f1)))
+  last=$(svn_rev trunk $(v8_hash $(echo $1 | cut -d":" -f2)))
+  num=$[ $last - $first]
+  echo "$BASE_URL?num=$num&start=$last"
+}
+
 ########## Option parsing
 
-while getopts ":hi:v:m:p:" OPTION ; do
+while getopts ":hi:v:m:p:u:" OPTION ; do
   case $OPTION in
     h)  usage
         exit 0
@@ -126,7 +149,9 @@ while getopts ":hi:v:m:p:" OPTION ; do
         ;;
     m)  merges_to_branch $OPTARG
         ;;
-    p)  point_merges "$(tag_log $(v8_hash $OPTARG)^1)"
+    p)  echo $(point_merges "$(tag_log $(v8_hash $OPTARG)^1)")
+        ;;
+    u)  url_for $OPTARG
         ;;
     ?)  echo "Illegal option: -$OPTARG"
         usage