function to put current git branch on the fish prompt

Ignore-this: 841402742571f399e012514315b8e4f0

darcs-hash:20090204190358-69c1e-2ebcf761a4e55bc049ff1d5bba272d722b2d4501.gz

share/functions/__fish_git_branch_prompt.fish

@@ -0,0 +1,22 @@
+# Prints the current git branch, if any
+function __fish_git_branch_prompt
+  set gitdir (git rev-parse --git-dir 2>/dev/null)
+  if [ -z $gitdir ]
+    return 0
+  end
+
+  set branch (git-symbolic-ref HEAD 2>/dev/null| cut -d / -f 3)
+
+  # check for rebase, bisect, etc
+  # TODO
+
+  # no branch, print hash of HEAD
+  if [ -z $branch ]
+    set branch (git log HEAD\^..HEAD --pretty=format:%h 2>/dev/null)
+  end
+
+  if [ ! -z $branch ]
+    echo " ($branch) "
+  end
+end
+