removed need to use temporary file in gitstatus.sh

gitstatus.sh

@@ -5,6 +5,10 @@
 #
 # Alan K. Stebbens <aks@stebbens.org> [http://github.com/aks]
 
+# helper functions
+count_lines() { echo "$1" | egrep -c "^$2" ; }
+all_lines() { echo "$1" | grep -v "^$" | wc -l ; }
+
 # change those symbols to whatever you prefer
 symbols_ahead='↑·'
 symbols_behind='↓·'
@@ -18,24 +22,17 @@ case "$gitsym" in fatal*) exit 0 ;; esac
 # the current branch is the tail end of the symbolic reference
 branch="${gitsym##*/}"    # get the basename after "refs/head/"
 
-tmp="/tmp/$$-gitstatus.out"
+gitstatus=`git diff --name-status 2>&1`
-trap "rm -f \"$tmp\"" EXIT
-
-status=`git diff --name-status >$tmp`
 
 # if the diff is fatal, exit now
-if grep -s "^fatal:" $tmp 2>/dev/null ; then
+case "$gitstatus" in fatal*) exit 0 ;; esac
-  exit
-fi
 
-# count_lines U
-count_lines() { egrep -c "^$1" <$tmp ; }
 
-num_changed=$(( `wc -l <$tmp` - `count_lines U` ))
+staged_files=`git diff --staged --name-status`
 
-staged_files=`git diff --staged --name-status >$tmp`
+num_changed=$(( `all_lines "$gitstatus"` - `count_lines "$gitstatus" U` ))
-num_conflicts=`count_lines U`
+num_conflicts=`count_lines "$staged_files" U`
-num_staged=$(( `wc -l <$tmp` - num_conflicts ))
+num_staged=$(( `all_lines "$staged_files"` - num_conflicts ))
 num_untracked=`git status -s -uall | grep -c "^??"`
 num_stashed=`git stash list | wc -l`
 
@@ -55,21 +52,24 @@ if [[ -z "$branch" ]]; then
   fi
 else
   remote_name=`git config branch.${branch}.remote`
+  
   if [[ -n "$remote_name" ]]; then
     merge_name=`git config branch.${branch}.merge`
   else
     remote_name='origin'
     merge_name="refs/heads/${branch}"
   fi
+
   if [[ "$remote_name" == '.' ]]; then
     remote_ref="$merge_name"
   else
     remote_ref="refs/remotes/$remote_name/${merge_name##*/}"
   fi
+
   # get the revision list, and count the leading "<" and ">"
-  revgit=`git rev-list --left-right ${remote_ref}...HEAD >$tmp`
+  revgit=`git rev-list --left-right ${remote_ref}...HEAD`
-  num_revs=`wc -l <$tmp`
+  num_revs=`all_lines "$revgit"`
-  num_ahead=`count_lines "^>"`
+  num_ahead=`count_lines "$revgit" "^>"`
   num_behind=$(( num_revs - num_ahead ))
   if (( num_behind > 0 )) ; then
     remote="${remote}${symbols_behind}${num_behind}"