Add ability to install v1 requiremets.yml

Fixes: #1376

examples/reqs_v1/requirements.yml

@@ -0,0 +1,2 @@
+# v1 requirements test file
+- src: geerlingguy.mysql

examples/reqs_v2/requirements.yml

@@ -0,0 +1,5 @@
+---
+roles:
+  - name: geerlingguy.mysql
+collections:
+  - name: ssbarnea.molecule

requirements-v1.yml

@@ -0,0 +1,5 @@
+---
+roles:
+  - name: geerlingguy.dotfiles
+  - name: geerlingguy.homebrew
+  - name: geerlingguy.mas

src/ansiblelint/_prerun.py

@@ -102,6 +102,7 @@ def prepare_environment() -> None:
 
         cmd = [
             "ansible-galaxy",
+            "role",
             "install",
             "--roles-path",
             ".cache/roles",
@@ -115,31 +116,36 @@ def prepare_environment() -> None:
             universal_newlines=True,
             check=False,
             stdout=subprocess.PIPE,
-            stderr=subprocess.PIPE,
+            stderr=subprocess.STDOUT,
         )
         if run.returncode != 0:
+            print(run.stdout, file=sys.stderr)
             sys.exit(run.returncode)
 
-        cmd = [
-            "ansible-galaxy",
-            "collection",
-            "install",
-            "-p",
-            ".cache/collections",
-            "-vr",
-            "requirements.yml",
-        ]
-
-        print("Running %s" % " ".join(cmd))
-        run = subprocess.run(
-            cmd,
-            universal_newlines=True,
-            check=False,
-            stdout=subprocess.PIPE,
-            stderr=subprocess.PIPE,
-        )
-        if run.returncode != 0:
-            sys.exit(run.returncode)
+        # Run galaxy collection install works on v2 requirements.yml
+        if "collections" in yaml_from_file("requirements.yml"):
+
+            cmd = [
+                "ansible-galaxy",
+                "collection",
+                "install",
+                "-p",
+                ".cache/collections",
+                "-vr",
+                "requirements.yml",
+            ]
+
+            print("Running %s" % " ".join(cmd))
+            run = subprocess.run(
+                cmd,
+                universal_newlines=True,
+                check=False,
+                stdout=subprocess.PIPE,
+                stderr=subprocess.STDOUT,
+            )
+            if run.returncode != 0:
+                print(run.stdout, file=sys.stderr)
+                sys.exit(run.returncode)
 
     _install_galaxy_role()
     _perform_mockings()

src/ansiblelint/rules/RoleNames.py

@@ -76,7 +76,7 @@ def matchyaml(self, file: Lintable) -> List["MatchError"]:
         role_name = _remove_prefix(role_name, "ansible-role-")
         if role_name not in self.done:
             self.done.append(role_name)
-            if not self._re.match(role_name):
+            if role_name and not self._re.match(role_name):
                 result.append(
                     self.create_matcherror(
                         filename=str(file.path),

test/test_prerun.py

@@ -0,0 +1,30 @@
+"""Tests related to prerun part of the linter."""
+import os
+
+from ansiblelint.testing import run_ansible_lint
+
+
+def test_prerun_reqs_v1() -> None:
+    """Checks that the linter can auto-install requirements v1 when found."""
+    cwd = os.path.realpath(
+        os.path.join(
+            os.path.dirname(os.path.realpath(__file__)), "..", "examples", "reqs_v1"
+        )
+    )
+    result = run_ansible_lint(".", cwd=cwd)
+    assert "Running ansible-galaxy role install" in result.stdout
+    assert "Running ansible-galaxy collection install" not in result.stdout
+    assert result.returncode == 0
+
+
+def test_prerun_reqs_v2() -> None:
+    """Checks that the linter can auto-install requirements v2 when found."""
+    cwd = os.path.realpath(
+        os.path.join(
+            os.path.dirname(os.path.realpath(__file__)), "..", "examples", "reqs_v2"
+        )
+    )
+    result = run_ansible_lint(".", cwd=cwd)
+    assert "Running ansible-galaxy role install" in result.stdout
+    assert "Running ansible-galaxy collection install" in result.stdout
+    assert result.returncode == 0