7 files changed, 115 insertions, 19 deletions
diff --git a/tools/get-scala-commit-date b/tools/get-scala-commit-date
new file mode 100755
index 0000000000..ef5b0f540d
--- /dev/null
+++ b/tools/get-scala-commit-date
@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+#
+# Usage: get-scala-commit-date [dir]
+# Figures out current commit date of a git clone.
+# If no dir is given, current working dir is used.
+#
+# Example build version string:
+#   20120312
+#
+
+[[ $# -eq 0 ]] || cd "$1"
+
+lastcommitdate=$(git log --format="%ci" HEAD | head -n 1 | cut -d ' ' -f 1)
+
+# 20120324
+echo "${lastcommitdate//-/}"
diff --git a/tools/get-scala-commit-date.bat b/tools/get-scala-commit-date.bat
new file mode 100644
index 0000000000..a07155533f
--- /dev/null
+++ b/tools/get-scala-commit-date.bat
@@ -0,0 +1,24 @@
+@echo off
+rem
+rem Usage: get-scala-revison.bat [dir]
+rem Figures out current scala commit date of a git clone.
+rem
+rem If no dir is given, current working dir is used.
+
+@setlocal
+set _DIR=
+if "%*"=="" (
+  for /f "delims=;" %%i in ('cd') do set "_DIR=%%i"
+) else (
+  set "_DIR=%~1"
+)
+cd %_DIR%
+
+rem  TODO - Check with a real windows user that this works!
+if exist .git\NUL (
+  for /f "tokens=1delims= " in ('git log --format="%ci" -1') do set commitdate=%%a
+  echo %commitdate%
+)
+
+:end
+@endlocal
diff --git a/tools/get-scala-commit-drift b/tools/get-scala-commit-drift
new file mode 100755
index 0000000000..4959826ec1
--- /dev/null
+++ b/tools/get-scala-commit-drift
@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+#
+# Usage: get-scala-commit-drift [dir]
+# Figures out current commit drift of a git clone.
+# If no dir is given, current working dir is used.
+#
+# Example output string:
+#   123
+#
+# Build drift = # of commits since last tag.
+
+[[ $# -eq 0 ]] || cd "$1"
+
+ensure_tag () {
+  sha=$1
+  rev=$2
+  
+  [[ -n $(git tag -l $rev) ]] || {
+    git tag -a -m "generated by get-scala-revision" $rev $sha
+  }
+}
+
+# Ensure some baseline tags are present so if this repository's
+# tags are screwed up or stale, we should still have a reference
+# point for a build string.
+ensure_tag 58cb15c40d v2.10.0-M1
+ensure_tag 29f3eace1e v2.9.1
+ensure_tag b0d78f6b9c v2.8.2
+
+# the closest tag, obtained separately because we have to
+# reconstruct the string around the padded distance.
+tag=$(git describe --tags --match 'v2*' --abbrev=0)
+
+# printf %016s is not portable for 0-padding, has to be a digit.
+# so we're stuck disassembling it.
+described=$(git describe --tags --match 'v2*' --abbrev=10)
+suffix="${described##${tag}-}"
+counter=$(echo $suffix | cut -d - -f 1)
+
+echo "$counter"
diff --git a/tools/get-scala-revision.bat b/tools/get-scala-commit-drift.bat
index 48c7cbd94f..ac289d3481 100644
--- a/tools/get-scala-revision.bat
+++ b/tools/get-scala-commit-drift.bat
@@ -1,7 +1,7 @@
 @echo off
 rem
-rem Usage: get-scala-revison.bat [dir]
-rem Figures out current scala revision of a git clone.
+rem Usage: get-scala-commit-drift.bat [dir]
+rem Figures out current scala commit drift, of a clone.
 rem
 rem If no dir is given, current working dir is used.
 
@@ -14,9 +14,8 @@ if "%*"=="" (
 )
 cd %_DIR%
 
-if exist .git\NUL (
-  git describe --abbrev=10 --always --tags
-)
+rem  TODO - WRITE THIS
+echo "TODO"
 
 :end
 @endlocal
diff --git a/tools/get-scala-revision b/tools/get-scala-commit-sha
index 4d97ec58ad..0abe31a53c 100755
--- a/tools/get-scala-revision
+++ b/tools/get-scala-commit-sha
@@ -1,11 +1,11 @@
 #!/usr/bin/env bash
 #
-# Usage: get-scala-revision [dir]
-# Figures out current scala revision of a git clone.
+# Usage: get-scala-commit-sha [dir]
+# Figures out current commit sha of a git clone.
 # If no dir is given, current working dir is used.
 #
 # Example build version string:
-#   v2.10.0-M1-0098-g6f1c486d0b-2012-02-01
+#   6f1c486d0ba
 #
 
 [[ $# -eq 0 ]] || cd "$1"
@@ -34,11 +34,7 @@ tag=$(git describe --tags --match 'v2*' --abbrev=0)
 # so we're stuck disassembling it.
 described=$(git describe --tags --match 'v2*' --abbrev=10)
 suffix="${described##${tag}-}"
-counter=$(echo $suffix | cut -d - -f 1)
 hash=$(echo $suffix | cut -d - -f 2)
+hash=${hash#g}
 
-# remove any alphabetic characters before the version number
-tag=$(echo $tag | sed "s/\([a-z_A-Z]*\)\(.*\)/\2/")
-
-# 2.10.0-M1-0098-g6f1c486d0b-2012-02-01
-printf "%s-%04d-%s-%s\n" "$tag" "$counter" "$hash" $(date "+%Y-%m-%d")
+echo "$hash"
diff --git a/tools/get-scala-commit-sha.bat b/tools/get-scala-commit-sha.bat
new file mode 100644
index 0000000000..80d9aa34b1
--- /dev/null
+++ b/tools/get-scala-commit-sha.bat
@@ -0,0 +1,21 @@
+@echo off
+rem
+rem Usage: get-scala-commit-drift.bat [dir]
+rem Figures out current scala commit drift, of a clone.
+rem
+rem If no dir is given, current working dir is used.
+
+@setlocal
+set _DIR=
+if "%*"=="" (
+  for /f "delims=;" %%i in ('cd') do set "_DIR=%%i"
+) else (
+  set "_DIR=%~1"
+)
+cd %_DIR%
+
+rem  TODO - truncate chars.
+git log -1 --format="%T"
+
+:end
+@endlocal
diff --git a/tools/verify-jar-cache b/tools/verify-jar-cache
index 1e86264ecb..8a376a6987 100755
--- a/tools/verify-jar-cache
+++ b/tools/verify-jar-cache
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # Discovers files whose sha sum does not match the
 # sha embedded in their directory name from ~/.sbt/cache/scala.
@@ -9,14 +9,14 @@ cd ~/.sbt/cache/scala
 unset failed
 
 unset removal
-[[ $1 == "-f" ]] && removal=true
+[[ "$1" == "-f" ]] && removal=true
 
 for file in $(find . -type f); do
   sha=$(echo "${file:2}" | sed 's/\/.*$//')
   sum=$(shasum "$file" | sed 's/ .*$//')
   if [[ $sum != $sha ]]; then
     failed=true
-    if [[ -n $removal ]]; then
+    if [[ -n "$removal" ]]; then
       echo "Removing corrupt file $file, shasum=$sum"
       rm -rf $sha
     else
@@ -25,9 +25,9 @@ for file in $(find . -type f); do
   fi
 done
 
-if [[ -z $failed ]]; then
+if [[ -z "$failed" ]]; then
   echo "All cached files match their shas."
-elif [[ -z $removal ]]; then
+elif [[ -z "$removal" ]]; then
   echo ""
   echo "Run again with -f to remove the corrupt files."
 fi