How does the deployment process work?

Whenever you are doing a deployment, the following things occur:

1. porter parses your project.ini file
2. it looks for a list of modules to be deployed
3. it recursively builds dependencies to be deployed, and it starts with them.

For each of the modules, porter does the following things:

1. it parses the module’s ini file in order to discover which plugins you are using.
2. It checks whether a deploy is actually needed - it uses release section for that. If an combination of (module, config, host, release) is found within porter.db, then the deployment is not performed.
3. it clones / refreshes the repository
4. it sets the appropriate branch / tag / revision / etc
5. it uses rsync to push your code to the destination machine
6. it stores the deployed version of the module into the porter.db