[PATCH v2] bash: offer to show (un)staged changes

[Thomas Rast <trast@student.ethz.ch>]

Add a bit of code to __git_ps1 that lets it append '*' to the branch
name if there are any unstaged changes, and '+' if there are any
staged changes.

Since this is a rather expensive operation and will force a lot of
data into the cache whenever you first enter a repository, you have to
enable it manually by setting bash.showDirtyState to a true value.

Signed-off-by: Thomas Rast <trast@student.ethz.ch>
---

This got no replies... was there anything wrong with v2?


 contrib/completion/git-completion.bash |   22 ++++++++++++++++++++--
 1 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index f8b845a..7864ca7 100755
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -34,6 +34,10 @@
 #       are currently in a git repository.  The %s token will be
 #       the name of the current branch.
 #
+#	In addition, if you set bash.showDirtyState to a true value,
+#	unstaged (*) and staged (+) changes will be shown next to the
+#	branch name.
+#
 # To submit patches:
 #
 #    *) Read Documentation/SubmittingPatches
@@ -116,10 +120,24 @@ __git_ps1 ()
 			fi
 		fi
 
+		local w
+		local i
+
+		if test "$(git config --bool bash.showDirtyState)" = "true"; then
+			git diff --no-ext-diff --ignore-submodules \
+				--quiet --exit-code || w="*"
+			if git rev-parse --quiet --verify HEAD >/dev/null; then
+				git diff-index --cached --quiet \
+					--ignore-submodules HEAD -- || i="+"
+			else
+				i="#"
+			fi
+		fi
+
 		if [ -n "${1-}" ]; then
-			printf "$1" "${b##refs/heads/}$r"
+			printf "$1" "${b##refs/heads/}$w$i$r"
 		else
-			printf " (%s)" "${b##refs/heads/}$r"
+			printf " (%s)" "${b##refs/heads/}$w$i$r"
 		fi
 	fi
 }
-- 
tg: (7bbd8d6..) t/ps1-dirty-state (depends on: origin/master)