ci: add yocto-check-layers step

Add a job to run yocto-check-layers to validate a selection of layers
are Yocto Project Compatible.

Right now we validate:
- meta-arm
- meta-arm-bsp
- meta-arm-toolchain
- meta-gem5

meta-atp and meta-arm-autonomy are currently skipped: meta-atp fails and
meta-arm-autonomy has a larger set of dependant layers and will be added
later.

Change-Id: Ia0c8c16e4228eeb461bd213b30703e950ede656f
Signed-off-by: Ross Burton <ross.burton@arm.com>

.gitlab-ci.yml

@@ -72,6 +72,14 @@ machine-coverage:
 # Build stage, the actual build jobs
 #
 
+# Validate layers are Yocto Project Compatible
+check-layers:
+  extends: .setup
+  coverage: '/Coverage: \d+/'
+  script:
+  - kas shell --update --force-checkout ci/base.yml:ci/meta-python.yml --command \
+    "$CI_PROJECT_DIR/ci/check-layers.py $CI_PROJECT_DIR/ci/check-layers.yml $CI_PROJECT_DIR $KAS_WORK_DIR"
+
 corstone500:
   extends: .build
 

ci/check-layers.py

@@ -0,0 +1,43 @@
+#! /usr/bin/env python3
+
+import argparse
+import pathlib
+import re
+import subprocess
+import sys
+
+import yaml
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("config", type=argparse.FileType())
+    parser.add_argument("metaarm", type=pathlib.Path, help="Path to meta-arm")
+    parser.add_argument("others", type=pathlib.Path, help="Path to parent of dependencies")
+    args = parser.parse_args()
+
+    config = yaml.safe_load(args.config)
+    layers = config["layers"]
+    dependencies = config["dependencies"]
+
+    found_layers = [p for p in args.metaarm.glob("meta-*") if p.is_dir()]
+    print(f"Testing {len(layers)} layers: {', '.join(layers)}.")
+    print(f"Found {len(found_layers)} layers in meta-arm.")
+    print()
+
+    cli = ["yocto-check-layer-wrapper",]
+    cli.extend([args.metaarm / layer for layer in layers])
+    cli.append("--dependency")
+    cli.extend([args.others / layer for layer in dependencies])
+
+    passed = 0
+    process = subprocess.Popen(cli, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, universal_newlines=True)
+    while True:
+        line = process.stdout.readline()
+        if process.poll() is not None:
+            break
+        print(line.strip())
+        if re.search(r"meta-.+ PASS", line):
+            passed += 1
+
+    print(f"Coverage: {int(passed / len(found_layers) * 100)}%")
+    sys.exit(process.returncode)

ci/check-layers.yml

@@ -0,0 +1,7 @@
+layers:
+  - meta-arm
+  - meta-arm-bsp
+  - meta-arm-toolchain
+  - meta-gem5
+dependencies:
+  - meta-openembedded/meta-oe