Update README

README.md

@@ -1,14 +1,42 @@
 # Container
 
 This project contains my personal docker compose configurations. 
-To use this configuartions the .env files have to be decrypted with 
+
-the key@dmeiburg.de key
+#### Operating principle:
+Changes in this repo get pushed to a bare repo on dmeiburg.de. 
+Whenever a push is received a post-receive hook runs.
+
+The post-receive hook then:
+- deploys the code into a working directory
+- decrypts .env.gpg files
+- restarts stacks with changed compose files
+
+The env files are encrypted for key@dmeiburg.de and server@dmeiburg.de.
+
+#### Server setup
 
 ```sh
-$ gpg -d .env.gpg > .env
+# create bare repo on dmeiburg.de
+mkdir -p git/container.git
+cd git/container.git
+git init --bare
 ```
 
-To encrypt an .env file the following command is used:
+```sh
+# install the post receive hook
+# whenever the hook is edited, this command has to be used again
+scp post-receive dmeiburg:~/git/container/hooks/
+```
+
+#### Local setup
+```sh
+# add bare repos as remote on local machine
+git remote add dmeiburg ssh://root@dmeiburg.de:/root/git/container.git
+```
+
+#### Encrypting .env files
+
+To encrypt an .env files, the following command is used:
 
 ```sh
 $ gpg -er key@dmeiburg.de -r server@dmeiburg.de .env
@@ -18,8 +46,8 @@ $ gpg -er key@dmeiburg.de -r server@dmeiburg.de .env
 #### Deployment 
 
 ```bash
-git remote add dmeiburg ssh://root@dmeiburg.de:/root/git/container.git
 git push dmeiburg
 ```
 
-Make sure  `post-receive` hook is installed in the bare repository.
+If necessary the post-receive hook has to be updated via scp.
+

post-receive

@@ -6,16 +6,15 @@
 WORK_TREE=~/container
 
 # get changed folders
-changed=`GIT_WORK_TREE=$WORK_TREE git diff --dirstat=files,0 HEAD | awk '{print $NF}' `
+changed_apps=`GIT_WORK_TREE=$WORK_TREE git diff --dirstat=files,0 HEAD | awk '{print $NF}' `
-
+[ -n "$changed_apps" ] && echo -e "Changed apps:\n$changed_apps"
-[ -n "$changed" ] && echo -e "Changed apps:\n$changed"
 
 # update files in working direcotry
 GIT_WORK_TREE=~/container git checkout -f
 
 # restart changed docker compose stacks
-for app in $changed; do
+for app in $changed_apps; do
-	cd $WORK_TREE/$changed
+	cd $WORK_TREE/$app
 	echo -e "\nUpdate $app"
 
 	# remove old .env if no .env.gpg is supplied