Use git-describe to create build string.

Created dev tag which is the merge-base of master and 2.9.1 (merge-base
is the last common commit), and told ant to generate build strings based
on that. So distributions look like

  scala-2.10.0.dev-1289-gbba3918

Where the 1289 means you are 1289 commits ahead of "dev" and
the last segment (minus the g) is the sha-1 hash.

This no doubt breaks windows even further.  Help getting it
back on its feet greatly appreciated.

2 files changed, 9 insertions, 46 deletions

diff --git a/tools/get-scala-revision b/tools/get-scala-revision
index 8731705d06..23b216aa2b 100755
--- a/tools/get-scala-revision
+++ b/tools/get-scala-revision
@@ -1,30 +1,12 @@
 #!/bin/sh
 #
 # Usage: get-scala-revision [dir]
-# Figures out current scala revision of an svn checkout or
-# a git-svn mirror (or a git clone.)
+# Figures out current scala revision of a git clone.
 #
 # If no dir is given, current working dir is used.
 
-DIR=""
-if [ $# -eq 0 ]; then
-  DIR=`pwd`
-else
-  DIR=$1
-fi
+[[ -n "$1" ]] && cd "$1"
 
-cd $DIR
-
-if [ -d .svn ]; then
-  # 2>&1 to catch also error output (e.g. svn warnings)
-  svn info . 2>&1 | grep ^Revision | sed 's/Revision: //'
-elif [ -d .git ]; then
-  GIT_PAGER=cat
-  # this grabs more than one line because otherwise if you have local
-  # commits which aren't in git-svn it won't see any revision.
-  git log -10 | grep git-svn-id | head -1 | sed 's/[^@]*@\([0-9]*\).*/\1/'
-else
-  echo "${DIR} doesn't appear to be git or svn dir." >&2
-  echo 0
-  exit 1
-fi
+# dev should be a tag at the merge-base of master and the
+# most recent release.
+git describe head --abbrev=7 --match dev
diff --git a/tools/get-scala-revision.bat b/tools/get-scala-revision.bat
index 880bcc3f5c..ed3ade8a3e 100644
--- a/tools/get-scala-revision.bat
+++ b/tools/get-scala-revision.bat
@@ -1,17 +1,11 @@
 @echo off
 rem
 rem Usage: get-scala-revison.bat [dir]
-rem Figures out current scala revision of an svn checkout or
-rem a git-svn mirror (or a git clone.)
+rem Figures out current scala revision of a git clone.
 rem
 rem If no dir is given, current working dir is used.
 
-if "%OS%" NEQ "Windows_NT" (
-  echo "Sorry, your version of Windows is too old to run Scala."
-  goto :eof
-)
 @setlocal
-
 set _DIR=
 if "%*"=="" (
   for /f "delims=;" %%i in ('cd') do set "_DIR=%%i"
@@ -20,23 +14,10 @@ if "%*"=="" (
 )
 cd %_DIR%
 
-if exist .svn\NUL (
-  rem 2>&1 to catch also error output (e.g. svn warnings)
-  for /f "skip=4 tokens=2" %%i in ('svn info') do (
-    echo %%i
-    goto :end
-  )
-) else ( if exist .git\NUL (
-  set _GIT_PAGER=type
-  rem this grabs more than one line because otherwise if you have local
-  rem commits which aren't in git-svn it won't see any revision.
-  rem TODO: git log -10 | findstr git-svn-id | ...
+if exist .git\NUL (
+  git describe head --abbrev=7 --match dev
   echo 0
-) else (
-  echo %_DIR% doesn't appear to be git or svn dir.
-  echo 0
-  exit 1
-))
+)
 
 :end
 @endlocal