drm/ci: add helper script update-xfails.py

Add helper script that given a gitlab pipeline url, analyse which are
the failures and flakes and update the xfails folder accordingly.

Example:
Trigger a pipeline in gitlab infrastructure, than re-try a few jobs more
than once (so we can have data if failures are consistent across jobs
with the same name or if they are flakes) and execute:

update-xfails.py https://gitlab.freedesktop.org/helen.fornazier/linux/-/pipelines/970661

git diff should show you that it updated files in xfails folder.
Signed-off-by: Helen Koike <helen.koike@collabora.com>
Tested-by: Vignesh Raman <vignesh.raman@collabora.com>
Reviewed-by: David Heidelberg <david.heidelberg@collabora.com>
Link: https://lore.kernel.org/r/20231024004525.169002-4-helen.koike@collabora.comSigned-off-by: Maxime Ripard <mripard@kernel.org>

drivers/gpu/drm/ci/xfails/requirements.txt

+git+https://gitlab.freedesktop.org/gfx-ci/ci-collate@09e7142715c16f54344ddf97013331ba063b162b
+termcolor==2.3.0
+
+# ci-collate dependencies
+certifi==2023.7.22
+charset-normalizer==3.2.0
+idna==3.4
+pip==23.2.1
+python-gitlab==3.15.0
+requests==2.31.0
+requests-toolbelt==1.0.0
+ruamel.yaml==0.17.32
+ruamel.yaml.clib==0.2.7
+setuptools==68.0.0
+tenacity==8.2.3
+urllib3==2.0.4
+wheel==0.41.1
\ No newline at end of file

drivers/gpu/drm/ci/xfails/update-xfails.py

+#!/usr/bin/env python3
+
+import argparse
+from collections import defaultdict
+import difflib
+import os
+import re
+from glcollate import Collate
+from termcolor import colored
+from urllib.parse import urlparse
+
+
+def get_canonical_name(job_name):
+    return re.split(r" \d+/\d+", job_name)[0]
+
+
+def get_xfails_file_path(job_name, suffix):
+    canonical_name = get_canonical_name(job_name)
+    name = canonical_name.replace(":", "-")
+    script_dir = os.path.dirname(os.path.abspath(__file__))
+    return os.path.join(script_dir, f"{name}-{suffix}.txt")
+
+
+def get_unit_test_name_and_results(unit_test):
+    if "Artifact results/failures.csv not found" in unit_test or '' == unit_test:
+        return None, None
+    unit_test_name, unit_test_result = unit_test.strip().split(",")
+    return unit_test_name, unit_test_result
+
+
+def read_file(file_path):
+    try:
+        with open(file_path, "r") as file:
+            f = file.readlines()
+            if len(f):
+                f[-1] = f[-1].strip() + "\n"
+            return f
+    except FileNotFoundError:
+        return []
+
+
+def save_file(content, file_path):
+    # delete file is content is empty
+    if not content or not any(content):
+        if os.path.exists(file_path):
+            os.remove(file_path)
+        return
+
+    with open(file_path, "w") as file:
+        file.writelines(content)
+
+
+def is_test_present_on_file(file_content, unit_test_name):
+    return any(unit_test_name in line for line in file_content)
+
+
+def is_unit_test_present_in_other_jobs(unit_test, job_ids):
+    return all(unit_test in job_ids[job_id] for job_id in job_ids)
+
+
+def remove_unit_test_if_present(lines, unit_test_name):
+    if not is_test_present_on_file(lines, unit_test_name):
+        return
+    lines[:] = [line for line in lines if unit_test_name not in line]
+
+
+def add_unit_test_if_not_present(lines, unit_test_name, file_name):
+    # core_getversion is mandatory
+    if "core_getversion" in unit_test_name:
+        print("WARNING: core_getversion should pass, not adding it to", os.path.basename(file_name))
+    elif all(unit_test_name not in line for line in lines):
+        lines.append(unit_test_name + "\n")
+
+
+def update_unit_test_result_in_fails_txt(fails_txt, unit_test):
+    unit_test_name, unit_test_result = get_unit_test_name_and_results(unit_test)
+    for i, line in enumerate(fails_txt):
+        if unit_test_name in line:
+            _, current_result = get_unit_test_name_and_results(line)
+            fails_txt[i] = unit_test + "\n"
+            return
+
+
+def add_unit_test_or_update_result_to_fails_if_present(fails_txt, unit_test, fails_txt_path):
+    unit_test_name, _ = get_unit_test_name_and_results(unit_test)
+    if not is_test_present_on_file(fails_txt, unit_test_name):
+        add_unit_test_if_not_present(fails_txt, unit_test, fails_txt_path)
+    # if it is present but not with the same result
+    elif not is_test_present_on_file(fails_txt, unit_test):
+        update_unit_test_result_in_fails_txt(fails_txt, unit_test)
+
+
+def split_unit_test_from_collate(xfails):
+    for job_name in xfails.keys():
+        for job_id in xfails[job_name].copy().keys():
+            if "not found" in xfails[job_name][job_id]:
+                del xfails[job_name][job_id]
+                continue
+            xfails[job_name][job_id] = xfails[job_name][job_id].strip().split("\n")
+
+
+def get_xfails_from_pipeline_url(pipeline_url):
+    parsed_url = urlparse(pipeline_url)
+    path_components = parsed_url.path.strip("/").split("/")
+
+    namespace = path_components[0]
+    project = path_components[1]
+    pipeline_id = path_components[-1]
+
+    print("Collating from:", namespace, project, pipeline_id)
+    xfails = (
+        Collate(namespace=namespace, project=project)
+        .from_pipeline(pipeline_id)
+        .get_artifact("results/failures.csv")
+    )
+
+    split_unit_test_from_collate(xfails)
+    return xfails
+
+
+def get_xfails_from_pipeline_urls(pipelines_urls):
+    xfails = defaultdict(dict)
+
+    for url in pipelines_urls:
+        new_xfails = get_xfails_from_pipeline_url(url)
+        for key in new_xfails:
+            xfails[key].update(new_xfails[key])
+
+    return xfails
+
+
+def print_diff(old_content, new_content, file_name):
+    diff = difflib.unified_diff(old_content, new_content, lineterm="", fromfile=file_name, tofile=file_name)
+    diff = [colored(line, "green") if line.startswith("+") else
+            colored(line, "red") if line.startswith("-") else line for line in diff]
+    print("\n".join(diff[:3]))
+    print("".join(diff[3:]))
+
+
+def main(pipelines_urls, only_flakes):
+    xfails = get_xfails_from_pipeline_urls(pipelines_urls)
+
+    for job_name in xfails.keys():
+        fails_txt_path = get_xfails_file_path(job_name, "fails")
+        flakes_txt_path = get_xfails_file_path(job_name, "flakes")
+
+        fails_txt = read_file(fails_txt_path)
+        flakes_txt = read_file(flakes_txt_path)
+
+        fails_txt_original = fails_txt.copy()
+        flakes_txt_original = flakes_txt.copy()
+
+        for job_id in xfails[job_name].keys():
+            for unit_test in xfails[job_name][job_id]:
+                unit_test_name, unit_test_result = get_unit_test_name_and_results(unit_test)
+
+                if not unit_test_name:
+                    continue
+
+                if only_flakes:
+                    remove_unit_test_if_present(fails_txt, unit_test_name)
+                    add_unit_test_if_not_present(flakes_txt, unit_test_name, flakes_txt_path)
+                    continue
+
+                # drop it from flakes if it is present to analyze it again
+                remove_unit_test_if_present(flakes_txt, unit_test_name)
+
+                if unit_test_result == "UnexpectedPass":
+                    remove_unit_test_if_present(fails_txt, unit_test_name)
+                    # flake result
+                    if not is_unit_test_present_in_other_jobs(unit_test, xfails[job_name]):
+                        add_unit_test_if_not_present(flakes_txt, unit_test_name, flakes_txt_path)
+                    continue
+
+                # flake result
+                if not is_unit_test_present_in_other_jobs(unit_test, xfails[job_name]):
+                    remove_unit_test_if_present(fails_txt, unit_test_name)
+                    add_unit_test_if_not_present(flakes_txt, unit_test_name, flakes_txt_path)
+                    continue
+
+                # consistent result
+                add_unit_test_or_update_result_to_fails_if_present(fails_txt, unit_test,
+                                                                   fails_txt_path)
+
+        fails_txt.sort()
+        flakes_txt.sort()
+
+        if fails_txt != fails_txt_original:
+            save_file(fails_txt, fails_txt_path)
+            print_diff(fails_txt_original, fails_txt, os.path.basename(fails_txt_path))
+        if flakes_txt != flakes_txt_original:
+            save_file(flakes_txt, flakes_txt_path)
+            print_diff(flakes_txt_original, flakes_txt, os.path.basename(flakes_txt_path))
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="Update xfails from a given pipeline.")
+    parser.add_argument("pipeline_urls", nargs="+", type=str, help="URLs to the pipelines to analyze the failures.")
+    parser.add_argument("--only-flakes", action="store_true", help="Treat every detected failure as a flake, edit *-flakes.txt only.")
+
+    args = parser.parse_args()
+
+    main(args.pipeline_urls, args.only_flakes)
+    print("Done.")