Merge pull request jwiegley#21 from javabrett/git-unpack

git-unpack fixes, improvement

Author: jwiegley

git-unpack

@@ -1,12 +1,21 @@
 #!/bin/sh
 
-mkdir /tmp/tmpgit.$$
-GIT_DIR=/tmp/tmpgit.$$ git init
+if [ -f .git/objects/pack/*.pack ]; then
+  mkdir /tmp/tmpgit.$$
+  GIT_DIR=/tmp/tmpgit.$$ git init
 
-for pack in .git/objects/pack/*.pack; do
+  for pack in .git/objects/pack/*.pack; do
     GIT_DIR=/tmp/tmpgit.$$ git unpack-objects < $pack
-done
+    if [ $? -ne 0 ]; then
+      echo "Unpack of $pack failed, aborting"
+      exit 1
+    fi
+  done
 
-rsync -a --delete /tmp/tmpgit.$$/objects/ .git/objects/
+  rsync -a --info=PROGRESS2 --delete /tmp/tmpgit.$$/objects/ .git/objects/
 
-rm -fr /tmp/tmpgit.$$
+  rm -fr /tmp/tmpgit.$$
+else
+  echo "No packs to unpack"
+  exit 1
+fi