From e22fd25c2028e1a3c030829de02954717570a030 Mon Sep 17 00:00:00 2001
From: Patrick Spek <p.spek@tyil.nl>
Date: Sun, 26 Mar 2023 12:08:00 +0200
Subject: Redo dir_hash with new file_hash functionality

---
 lib/util.bash | 35 ++++++++++++++++++++++++++++++++---
 1 file changed, 32 insertions(+), 3 deletions(-)

(limited to 'lib')

diff --git a/lib/util.bash b/lib/util.bash
index c36b576..fac492c 100644
--- a/lib/util.bash
+++ b/lib/util.bash
@@ -63,9 +63,19 @@ die() {
 # in a directory. It can be used to check whether contents changed after
 # templating files in a given directory.
 dir_hash() {
-	find "$1" -type f -exec sha1sum {} \; \
-		| sha1sum \
-		| awk '{ print $1 }'
+	local path
+
+	path="$1" ; shift
+
+	for entry in "$path"/*
+	do
+		if [[ -d "$entry" ]]
+		then
+			dir_hash "$entry"
+		fi
+
+		file_hash "$entry"
+	done | file_hash -
 }
 
 # Fetch a file from an URL. Using this function introduces a dependency on curl.
@@ -108,6 +118,25 @@ fetch_http_wget() {
 	wget --quiet --output-document "$2" "$1"
 }
 
+# Hash a given file. This is a convenience function to work around different
+# systems calling their file hashing programs differently, and generating
+# different output. This function only expects 1 file as argument, and only
+# outputs the hash of this particular file.
+file_hash() {
+	file_hash_md5 "$@"
+}
+
+file_hash_md5() {
+	local file
+
+	file="$1" ; shift
+
+	case "${BASHTARD_PLATFORM[key]}" in
+		freebsd) md5 "$file" | awk '{ print $NF }' ;;
+		linux-*) md5sum "$file" | awk '{ print $1 }' ;;
+	esac
+}
+
 # A very simple means of templating a file, using sed and awk. The template
 # file is assumed to exist within the share directory of the current playbook.
 # Variables are passed as key=value pairs to this function. Inside the
-- 
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