Support formatter in repo url

The repo url in project.yml can now contain {} or {0}. This value is
substituted with the name of module. If no formatter directions are
present in the repo, the name will be appended.

This changes supports repos of the form https://gitlab.com/foo/bar.git

docs/guides/configurationmodel.rst

@@ -51,9 +51,8 @@ modules. project.yml defines the following settings:
         * master: Use the master branch.
 
     * ``repo`` This key requires a list (a yaml list) of repositories where Inmanta can find
-      modules. The git url of a module is created by appending the name of the module to the repo
-      in this list. Inmanta tries to clone a module in the order in which it is defined in this
-      value.
+      modules. Inmanta creates the git repo url by formatting {} or {0} with the name of the repo. If no formatter is present it
+      appends the name of the module. Inmanta tries to clone a module in the order in which it is defined in this value.
     * ``requires`` Model files import other modules. These imports do not determine a version, this
       is based on the install_model setting. Modules and projects can constrain a version in the
       requires setting. Similar to the module, version constraints are defined using `PEP440 syntax

src/inmanta/module.py

@@ -285,7 +285,11 @@ def __init__(self, baseurl):
 
     def clone(self, name: str, dest: str) -> bool:
         try:
-            gitprovider.clone(self.baseurl + name, os.path.join(dest, name))
+            url = self.baseurl.format(name)
+            if url == self.baseurl:
+                url = self.baseurl + name
+
+            gitprovider.clone(url, os.path.join(dest, name))
             return True
         except Exception:
             LOGGER.debug("could not clone repo", exc_info=True)