[PATCH v2 12/23] contrib/subtree: Add command prune

[Paul Campbell <pcampbell@xxxxxxxxxxx>]

From: Nate Jones <nate@xxxxxxxxx>

Removes entries in .gittrees where the subtree files are
no longer present on disk.

Signed-off-by: Paul Campbell <pcampbell@xxxxxxxxxxx>

Conflicts:
	git-subtree.sh
---
 contrib/subtree/git-subtree.sh | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/contrib/subtree/git-subtree.sh b/contrib/subtree/git-subtree.sh
index 7d08064..0c41383 100755
--- a/contrib/subtree/git-subtree.sh
+++ b/contrib/subtree/git-subtree.sh
@@ -105,12 +105,12 @@ done
 command="$1"
 shift
 case "$command" in
-	add|merge|pull|from-submodule|pull-all|push-all) default= ;;
+    add|merge|pull|from-submodule|pull-all|push-all|prune) default= ;;
 	*) die "Unknown command '$command'" ;;
     split|push|diff|list) default="--default HEAD" ;;
 esac
 
-if [ -z "$prefix" -a "$command" != "pull-all" -a "$command" != "push-all" -a "$command" != "list" ]; then
+if [ -z "$prefix" -a "$command" != "pull-all" -a "$command" != "push-all" -a "$command" != "list" -a "$command" != "prune" ]; then
 	die "You must provide the --prefix option."
 fi
 
@@ -839,6 +839,17 @@ cmd_list()
   subtree_list 
 }
 
+cmd_prune()
+{
+    git config -f .gittrees -l | grep subtree | grep path | grep -o '=.*' | grep -o '[^=].*' |
+    while read path; do
+        if [ ! -e "$path" ]; then
+            echo "pruning $path"
+            git config -f .gittrees --remove-section subtree.$path
+        fi
+    done
+}
+
 cmd_pull-all()
 {
     git config -f .gittrees -l | grep subtree | grep path | grep -o '=.*' | grep -o '[^=].*' |
-- 
1.8.2.rc1

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