[TheRock CI] Adding presubmit check for CK (#2688)

* Adding presubmit check for CK

* Adding exclusion

* Enable forks

[ROCm/composable_kernel commit: b4f3487d84]

.github/scripts/therock_configure_ci.py

@@ -0,0 +1,112 @@
+import fnmatch
+import json
+import os
+from pathlib import Path
+import subprocess
+import sys
+from typing import Iterable, Optional, Mapping
+
+def gha_set_output(vars: Mapping[str, str | Path]):
+    """Sets values in a step's output parameters.
+
+    This appends to the file located at the $GITHUB_OUTPUT environment variable.
+
+    See
+      * https://docs.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-an-output-parameter
+      * https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/passing-information-between-jobs
+    """
+    print(f"Setting github output:\n{vars}")
+
+    step_output_file = os.getenv("GITHUB_OUTPUT")
+    if not step_output_file:
+        print("  Warning: GITHUB_OUTPUT env var not set, can't set github outputs")
+        return
+
+    with open(step_output_file, "a") as f:
+        f.writelines(f"{k}={str(v)}" + "\n" for k, v in vars.items())
+
+def get_modified_paths(base_ref: str) -> Optional[Iterable[str]]:
+    """Returns the paths of modified files relative to the base reference."""
+    try:
+        return subprocess.run(
+            ["git", "diff", "--name-only", base_ref],
+            stdout=subprocess.PIPE,
+            check=True,
+            text=True,
+            timeout=60,
+        ).stdout.splitlines()
+    except TimeoutError:
+        print(
+            "Computing modified files timed out. Not using PR diff to determine"
+            " jobs to run.",
+            file=sys.stderr,
+        )
+        return None
+
+# Paths matching any of these patterns are considered to have no influence over
+# build or test workflows so any related jobs can be skipped if all paths
+# modified by a commit/PR match a pattern in this list.
+SKIPPABLE_PATH_PATTERNS = [
+    "docs/*",
+    "*.gitignore",
+    "*.md",
+    "*.pre-commit-config.*",
+    "*LICENSE",
+    'Jenkinsfile',
+    '.github/ISSUE_TEMPLATE/*',
+    '.github/CODEOWNERS',
+    '.github/*.md',
+    '.github/dependabot.yml',
+]
+
+def is_path_skippable(path: str) -> bool:
+    """Determines if a given relative path to a file matches any skippable patterns."""
+    return any(fnmatch.fnmatch(path, pattern) for pattern in SKIPPABLE_PATH_PATTERNS)
+
+def check_for_non_skippable_path(paths: Optional[Iterable[str]]) -> bool:
+    """Returns true if at least one path is not in the skippable set."""
+    if paths is None:
+        return False
+    return any(not is_path_skippable(p) for p in paths)
+
+def should_ci_run_given_modified_paths(paths: Optional[Iterable[str]]) -> bool:
+    """Returns true if CI workflows should run given a list of modified paths."""
+
+    if paths is None:
+        print("No files were modified, skipping TheRock CI jobs")
+        return False
+
+    paths_set = set(paths)
+    github_workflows_paths = set(
+        [p for p in paths if p.startswith(".github/workflows")]
+    )
+    other_paths = paths_set - github_workflows_paths
+
+    contains_other_non_skippable_files = check_for_non_skippable_path(other_paths)
+
+    print("should_ci_run_given_modified_paths findings:")
+    print(f"  contains_other_non_skippable_files: {contains_other_non_skippable_files}")
+
+    if contains_other_non_skippable_files:
+        print("Enabling TheRock CI jobs since a non-skippable path was modified")
+        return True
+    else:
+        print(
+            "Only unrelated and/or skippable paths were modified, skipping TheRock CI jobs"
+        )
+        return False
+
+def main(args):
+    base_ref = args.get("base_ref")
+    modified_paths = get_modified_paths(base_ref)
+    print("modified_paths (max 200):", modified_paths[:200])
+    enable_jobs = should_ci_run_given_modified_paths(modified_paths)
+    output = {
+        'enable_therock_ci': json.dumps(enable_jobs)
+    }
+    gha_set_output(output)
+
+if __name__ == "__main__":
+    args = {}
+    args["base_ref"] = os.environ.get("BASE_REF", "HEAD^1")
+    main(args)