Automatically add --pre when installing collections from git reposito…

…ries (#327)

Related: ansible/ansible-lint#3686
Related: ansible/ansible#79109

examples/reqs_v2/requirements.yml

@@ -9,3 +9,13 @@ roles:
     name: geerlingguy.mysql
 collections:
   - name: community-molecule-0.1.0.tar.gz
+  # Also needed for testing purposes as this should trigger addition of --pre
+  # argument as this is required due to
+  # https://github.com/ansible/ansible-lint/issues/3686
+  # https://github.com/ansible/ansible/issues/79109
+  - name: https://github.com/ansible-collections/amazon.aws.git
+    type: git
+    version: main
+  - name: https://github.com/ansible-collections/community.aws.git
+    type: git
+    version: main

src/ansible_compat/runtime.py

@@ -555,6 +555,13 @@ def install_requirements(  # noqa: C901
                 "install",
                 "-v",
             ]
+            for collection in reqs_yaml["collections"]:
+                if isinstance(collection, dict) and collection.get("type", "") == "git":
+                    _logger.info(
+                        "Adding '--pre' to ansible-galaxy collection install because we detected one collection being sourced from git.",
+                    )
+                    cmd.append("--pre")
+                    break
             if offline:
                 _logger.warning(
                     "Skipped installing collection dependencies due to running in offline mode.",