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from __future__ import annotations
import json
import os
import re
import subprocess
from collections import defaultdict
from functools import lru_cache
from pathlib import Path
from typing import cast, Dict, TYPE_CHECKING
from urllib.request import Request, urlopen
from warnings import warn
if TYPE_CHECKING:
from tools.testing.test_run import TestRun
REPO_ROOT = Path(__file__).resolve().parent.parent.parent.parent.parent
def python_test_file_to_test_name(tests: set[str]) -> set[str]:
prefix = f"test{os.path.sep}"
valid_tests = {f for f in tests if f.startswith(prefix) and f.endswith(".py")}
valid_tests = {f[len(prefix) : -len(".py")] for f in valid_tests}
return valid_tests
@lru_cache(maxsize=None)
def get_pr_number() -> int | None:
pr_number = os.environ.get("PR_NUMBER", "")
if pr_number == "":
re_match = re.match(r"^refs/tags/.*/(\d+)$", os.environ.get("GITHUB_REF", ""))
if re_match is not None:
pr_number = re_match.group(1)
if pr_number != "":
return int(pr_number)
return None
@lru_cache(maxsize=None)
def get_merge_base() -> str:
pr_number = get_pr_number()
if pr_number is not None:
github_token = os.environ.get("GITHUB_TOKEN")
headers = {
"Accept": "application/vnd.github.v3+json",
"Authorization": f"token {github_token}",
}
url = f"https://api.github.com/repos/pytorch/pytorch/pulls/{pr_number}"
with urlopen(Request(url, headers=headers)) as conn:
pr_info = json.loads(conn.read().decode())
base = f"origin/{pr_info['base']['ref']}"
merge_base = (
subprocess.check_output(["git", "merge-base", base, "HEAD"])
.decode()
.strip()
)
return merge_base
default_branch = f"origin/{os.environ.get('GIT_DEFAULT_BRANCH', 'main')}"
merge_base = (
subprocess.check_output(["git", "merge-base", default_branch, "HEAD"])
.decode()
.strip()
)
head = subprocess.check_output(["git", "rev-parse", "HEAD"]).decode().strip()
if merge_base == head:
# We are on the default branch, so check for changes since the last commit
merge_base = "HEAD^"
return merge_base
def query_changed_files() -> list[str]:
base_commit = get_merge_base()
proc = subprocess.run(
["git", "diff", "--name-only", base_commit, "HEAD"],
capture_output=True,
check=False,
)
print(f"base_commit: {base_commit}")
if proc.returncode != 0:
raise RuntimeError("Unable to get changed files")
lines = proc.stdout.decode().strip().split("\n")
lines = [line.strip() for line in lines]
print(f"Changed files: {lines}")
return lines
@lru_cache(maxsize=None)
def get_git_commit_info() -> str:
"""Gets the commit info since the last commit on the default branch."""
base_commit = get_merge_base()
return (
subprocess.check_output(
["git", "log", f"{base_commit}..HEAD"],
)
.decode()
.strip()
)
@lru_cache(maxsize=None)
def get_issue_or_pr_body(number: int) -> str:
"""Gets the body of an issue or PR"""
github_token = os.environ.get("GITHUB_TOKEN")
headers = {
"Accept": "application/vnd.github.v3+json",
"Authorization": f"token {github_token}",
}
# Despite the 'issues' in the link, this also works for PRs
url = f"https://api.github.com/repos/pytorch/pytorch/issues/{number}"
with urlopen(Request(url, headers=headers)) as conn:
body: str = json.loads(conn.read().decode())["body"] or ""
return body
def normalize_ratings(
ratings: dict[TestRun, float], max_value: float, min_value: float = 0
) -> dict[TestRun, float]:
# Takse the ratings, makes the max value into max_value, and proportionally
# distributes the rest of the ratings.
# Ex [1,2,3,4] and max_value 8 gets converted to [2,4,6,8]
# Assumes all rankings are >= 0
# min_value is what 0 gets mapped to and shifts the values accordingly. Ex
# [1,2,3,4], min_value 1, max_value 5 gets converted to [2,3,4,5]
# Don't modify in place
if len(ratings) == 0:
return ratings
min_rating = min(ratings.values())
assert min_rating > 0
max_rating = max(ratings.values())
assert max_rating > 0
normalized_ratings = {}
for tf, rank in ratings.items():
normalized_ratings[tf] = rank / max_rating * (max_value - min_value) + min_value
return normalized_ratings
def get_ratings_for_tests(file: str | Path) -> dict[str, float]:
path = REPO_ROOT / file
if not os.path.exists(path):
print(f"could not find path {path}")
return {}
with open(path) as f:
test_file_ratings = cast(Dict[str, Dict[str, float]], json.load(f))
try:
changed_files = query_changed_files()
except Exception as e:
warn(f"Can't query changed test files due to {e}")
return {}
ratings: dict[str, float] = defaultdict(float)
for file in changed_files:
for test_file, score in test_file_ratings.get(file, {}).items():
ratings[test_file] += score
return ratings
def get_correlated_tests(file: str | Path) -> list[str]:
ratings = get_ratings_for_tests(file)
prioritize = sorted(ratings, key=lambda x: -ratings[x])
return prioritize
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