[PATCH] completion: Add PS1 configuration for submodules

[Scott Kyle <scott@appden.com>]

For those who often work on repositories with submodules, the dirty
indicator for unstaged changes will almost always show because development
is simultaneously happening on those submodules. The config option
diff.ignoreSubmodules is not appropriate for this use because it has larger
implications.

Signed-off-by: Scott Kyle <scott@appden.com>
---
 contrib/completion/git-completion.bash |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 604fa79..539bcb1 100755
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -37,7 +37,9 @@
 #       value, unstaged (*) and staged (+) changes will be shown next
 #       to the branch name.  You can configure this per-repository
 #       with the bash.showDirtyState variable, which defaults to true
-#       once GIT_PS1_SHOWDIRTYSTATE is enabled.
+#       once GIT_PS1_SHOWDIRTYSTATE is enabled.  You can also set
+#       GIT_PS1_IGNORESUBMODULES to a value that git diff understands
+#       to adjust the behavior of the dirty state indicator.
 #
 #       You can also see if currently something is stashed, by setting
 #       GIT_PS1_SHOWSTASHSTATE to a nonempty value. If something is stashed,
@@ -286,7 +288,8 @@ __git_ps1 ()
 		elif [ "true" = "$(git rev-parse --is-inside-work-tree 2>/dev/null)" ]; then
 			if [ -n "${GIT_PS1_SHOWDIRTYSTATE-}" ]; then
 				if [ "$(git config --bool bash.showDirtyState)" != "false" ]; then
-					git diff --no-ext-diff --quiet --exit-code || w="*"
+					local ignore_submodules=${GIT_PS1_IGNORESUBMODULES+"--ignore-submodules=$GIT_PS1_IGNORESUBMODULES"}
+					git diff $ignore_submodules --no-ext-diff --quiet --exit-code || w="*"
 					if git rev-parse --quiet --verify HEAD >/dev/null; then
 						git diff-index --cached --quiet HEAD -- || i="+"
 					else
-- 
1.7.3.3.574.g98527