Add file_rhash utility

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/util.bash b/lib/util.bash
index 6ad69e1..604e3e5 100644
--- a/lib/util.bash
+++ b/lib/util.bash
@@ -130,6 +130,16 @@ join_args() {
 	printf "%s" "$*"
 }
 
+# Recursively hash files in a directory, and hashing the output of all those
+# hashes again. This results in a single hash representing the state of files
+# in a directory. It can be used to check whether contents changed after
+# templating files in a given directory.
+file_rhash() {
+	find "$1" -type f -exec sha1sum {} \; \
+		| sha1sum \
+		| awk '{ print $1 }'
+}
+
 file_template()
 {
 	local file="$BASHTARD_ETCDIR/playbooks.d/$BASHTARD_PLAYBOOK/share/$1" ; shift