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#!/usr/bin/env python3
import re
import subprocess
import sys
verbosity = 0 # Show what's going on, 0 1 or 2.
suggestions = 1 # Set to 0 to not include lengthy suggestions in error messages.
ignore_prefixes = []
def verbose(*args):
if verbosity:
print(*args)
def very_verbose(*args):
if verbosity > 1:
print(*args)
class ErrorCollection:
# Track errors and warnings as the program runs
def __init__(self):
self.has_errors = False
self.has_warnings = False
self.prefix = ""
def error(self, text):
print("error: {}{}".format(self.prefix, text))
self.has_errors = True
def warning(self, text):
print("warning: {}{}".format(self.prefix, text))
self.has_warnings = True
def git_log(pretty_format, *args):
# Delete pretty argument from user args so it doesn't interfere with what we do.
args = ["git", "log"] + [arg for arg in args if "--pretty" not in args]
args.append("--pretty=format:" + pretty_format)
very_verbose("git_log", *args)
# Generator yielding each output line.
for line in subprocess.Popen(args, stdout=subprocess.PIPE).stdout:
yield line.decode().rstrip("\r\n")
def diagnose_subject_line(subject_line, subject_line_format, err):
err.error('Subject line: "' + subject_line + '"')
if not subject_line.endswith("."):
err.error('* must end with "."')
if not re.match(r"^[^!]+: ", subject_line):
err.error('* must start with "path: "')
if re.match(r"^[^!]+: *$", subject_line):
err.error("* must contain a subject after the path.")
m = re.match(r"^[^!]+: ([a-z][^ ]*)", subject_line)
if m:
err.error('* first word of subject ("{}") must be capitalised.'.format(m.group(1)))
if re.match(r"^[^!]+: [^ ]+$", subject_line):
err.error("* subject must contain more than one word.")
err.error("* must match: " + repr(subject_line_format))
err.error('* Example: "py/runtime: Add support for foo to bar."')
def verify(sha, err):
verbose("verify", sha)
err.prefix = "commit " + sha + ": "
# Author and committer email.
for line in git_log("%ae%n%ce", sha, "-n1"):
very_verbose("email", line)
if "noreply" in line:
err.error("Unwanted email address: " + line)
# Message body.
raw_body = list(git_log("%B", sha, "-n1"))
verify_message_body(raw_body, err)
def verify_message_body(raw_body, err):
if not raw_body:
err.error("Message is empty")
return
# Subject line.
subject_line = raw_body[0]
for prefix in ignore_prefixes:
if subject_line.startswith(prefix):
verbose("Skipping ignored commit message")
return
very_verbose("subject_line", subject_line)
subject_line_format = r"^[^!]+: [A-Z]+.+ .+\.$"
if not re.match(subject_line_format, subject_line):
diagnose_subject_line(subject_line, subject_line_format, err)
if len(subject_line) >= 73:
err.error("Subject line must be 72 or fewer characters: " + subject_line)
# Do additional checks on the prefix of the subject line.
verify_subject_line_prefix(subject_line.split(": ")[0], err)
# Second one divides subject and body.
if len(raw_body) > 1 and raw_body[1]:
err.error("Second message line must be empty: " + raw_body[1])
# Message body lines.
for line in raw_body[2:]:
# Long lines with URLs or human names are exempt from the line length rule.
if len(line) >= 76 and not (
"://" in line
or line.startswith("Co-authored-by: ")
or line.startswith("Signed-off-by: ")
):
err.error("Message lines should be 75 or less characters: " + line)
if not raw_body[-1].startswith("Signed-off-by: ") or "@" not in raw_body[-1]:
err.error('Message must be signed-off. Use "git commit -s".')
def verify_subject_line_prefix(prefix, err):
ext = (".c", ".h", ".cpp", ".js", ".rst", ".md")
if prefix.startswith((".", "/")):
err.error('Subject prefix cannot begin with "." or "/".')
if prefix.endswith("/"):
err.error('Subject prefix cannot end with "/".')
if prefix.startswith("ports/"):
err.error(
'Subject prefix cannot begin with "ports/", start with the name of the port instead.'
)
if prefix.endswith(ext):
err.error(
"Subject prefix cannot end with a file extension, use the main part of the filename without the extension."
)
def run(args):
verbose("run", *args)
err = ErrorCollection()
if "--check-file" in args:
filename = args[-1]
verbose("checking commit message from", filename)
with open(args[-1]) as f:
# Remove comment lines as well as any empty lines at the end.
lines = [line.rstrip("\r\n") for line in f if not line.startswith("#")]
while not lines[-1]:
lines.pop()
verify_message_body(lines, err)
else: # Normal operation, pass arguments to git log
for sha in git_log("%h", *args):
verify(sha, err)
if err.has_errors or err.has_warnings:
if suggestions:
print("See https://github.com/micropython/micropython/blob/master/CODECONVENTIONS.md")
else:
print("ok")
if err.has_errors:
sys.exit(1)
def show_help():
print("usage: verifygitlog.py [-v -n -h --check-file] ...")
print("-v : increase verbosity, can be specified multiple times")
print("-n : do not print multi-line suggestions")
print("-h : print this help message and exit")
print(
"--check-file : Pass a single argument which is a file containing a candidate commit message"
)
print(
"--ignore-rebase : Skip checking commits with git rebase autosquash prefixes or WIP as a prefix"
)
print("... : arguments passed to git log to retrieve commits to verify")
print(" see https://www.git-scm.com/docs/git-log")
print(" passing no arguments at all will verify all commits")
print("examples:")
print("verifygitlog.py -n10 # Check last 10 commits")
print("verifygitlog.py -v master..HEAD # Check commits since master")
if __name__ == "__main__":
args = sys.argv[1:]
verbosity = args.count("-v")
suggestions = args.count("-n") == 0
if "--ignore-rebase" in args:
args.remove("--ignore-rebase")
ignore_prefixes = ["squash!", "fixup!", "amend!", "WIP"]
if "-h" in args:
show_help()
else:
args = [arg for arg in args if arg not in ["-v", "-n", "-h"]]
run(args)
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