From 870d2cb3873dd3881169342198c5b8822e35e6db Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Wed, 6 Mar 2019 21:05:25 +0100
Subject: mark-as-expendable-dir.in: do not overwrite existing tag files

---
 mark-as-expendable-dir.in | 38 ++++++++++++++++++++++----------------
 1 file changed, 22 insertions(+), 16 deletions(-)

diff --git a/mark-as-expendable-dir.in b/mark-as-expendable-dir.in
index e615d3c..bb31b3e 100644
--- a/mark-as-expendable-dir.in
+++ b/mark-as-expendable-dir.in
@@ -59,20 +59,26 @@ done
 
 for dir in "$@"
 do
-  {
-    printf 'Signature: '
-    printf '.IsCacheDirectory' | \
-      md5sum - | \
-      cut -d' ' -f 1
-    printf '# This file is a cache directory tag created by %s for %s.\n' \
-      "$(basename "$0")" \
-      "${caller}"
-    printf '# For information about cache directory tags, see:\n'
-    printf '#      http://www.brynosaurus.com/cachedir/\n'
-  } > "${dir}/CACHEDIR.TAG"
-  {
-    printf '+ .rsync-filter\n'
-    printf -- '- *\n'
-  } > "${dir}/.rsync-filter"
-  touch "${dir}/.nobackup"
+  if [ ! -f "${dir}/CACHEDIR.TAG" ]; then
+    {
+      printf 'Signature: '
+      printf '.IsCacheDirectory' | \
+        md5sum - | \
+        cut -d' ' -f 1
+      printf '# This file is a cache directory tag created by %s for %s.\n' \
+        "$(basename "$0")" \
+        "${caller}"
+      printf '# For information about cache directory tags, see:\n'
+      printf '#      http://www.brynosaurus.com/cachedir/\n'
+    } > "${dir}/CACHEDIR.TAG"
+  fi
+  if [ ! -f "${dir}/.rsync-filter" ]; then
+    {
+      printf '+ .rsync-filter\n'
+      printf -- '- *\n'
+    } > "${dir}/.rsync-filter"
+  fi
+  if [ ! -f "${dir}/.nobackup" ]; then
+    touch "${dir}/.nobackup"
+  fi
 done
-- 
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