From f0042e4aa06cd5040b4b7ec3ad206b1f8e5f01eb Mon Sep 17 00:00:00 2001
From: Jimmy Monin <jimmy@monin.net>
Date: Tue, 5 Sep 2017 21:23:44 +0200
Subject: [PATCH] Handle nginx conf file checksums

---
 scripts/_common.sh | 14 ++++++++++++++
 scripts/change_url | 10 +++++++++-
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/scripts/_common.sh b/scripts/_common.sh
index a1b1dc7..656978d 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -36,6 +36,7 @@ QUIET () {	# redirect standard output to /dev/null
 	$@ > /dev/null
 }
 
+
 HUMAN_SIZE () {	# Transforms a Kb-based size to a human-readable size
 	human=$(numfmt --to=iec --from-unit=1K $1)
 	echo $human
@@ -62,3 +63,16 @@ CHECK_FINALPATH () {	# Check if destination directory already exists
 	final_path="/var/www/$app"
 	test ! -e "$final_path" || ynh_die "This path already contains a folder"
 }
+
+
+# ============= FUTURE YUNOHOST HELPER =============
+# Delete a file checksum from the app settings
+#
+# $app should be defined when calling this helper
+#
+# usage: ynh_remove_file_checksum file
+# | arg: file - The file for which the checksum will be deleted
+ynh_delete_file_checksum () {
+	local checksum_setting_name=checksum_${1//[\/ ]/_}	# Replace all '/' and ' ' by '_'
+	ynh_app_setting_delete $app $checksum_setting_name
+}
diff --git a/scripts/change_url b/scripts/change_url
index 34495e4..1a2bb6e 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -65,6 +65,8 @@ nginx_conf_path=/etc/nginx/conf.d/$old_domain.d/$app.conf
 # Change the path in the nginx config file
 if [ $change_path -eq 1 ]
 then
+  # Make a backup of the original nginx config file if modified
+  ynh_backup_if_checksum_is_different "$nginx_conf_path"
   if [ "$new_path" = "/" ] && [ "$old_path" != "/" ] ; then
     # Replace path in several location occurrences based on different recognition patterns
     ynh_replace_string "location $old_path/ {\$" "location / {" "$nginx_conf_path"
@@ -90,12 +92,18 @@ then
     # Replace path in "rewrite" directive
     ynh_replace_string "rewrite ^ $old_path" "rewrite ^ $new_path" "$nginx_conf_path"
   fi
+  # Calculate and store the nginx config file checksum
+  ynh_store_file_checksum "$nginx_conf_path"
 fi
 
 # Change the domain for nginx
 if [ $change_domain -eq 1 ]
 then
-	mv $nginx_conf_path /etc/nginx/conf.d/$new_domain.d/$app.conf
+  # Delete file checksum for the old conf file location
+  ynh_delete_file_checksum "$nginx_conf_path"
+  mv $nginx_conf_path /etc/nginx/conf.d/$new_domain.d/$app.conf
+  # Store file checksum for the new config file location
+  ynh_store_file_checksum "/etc/nginx/conf.d/$new_domain.d/$app.conf"
 fi
 
 #=================================================