212 lines
7.3 KiB
Python
Executable File
212 lines
7.3 KiB
Python
Executable File
#! /usr/bin/env python3
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# TODO
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# - option to just list all broken files
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# - test suite
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# - validate signed-off-by
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class Result:
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# Whether the patch has an Upstream-Status or not
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missing_upstream_status = False
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# If the Upstream-Status tag is malformed in some way (string for bad bit)
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malformed_upstream_status = None
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# If the Upstream-Status value is unknown (boolean)
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unknown_upstream_status = False
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# The upstream status value (Pending, etc)
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upstream_status = None
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# Whether the patch has a Signed-off-by or not
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missing_sob = False
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# Whether the Signed-off-by tag is malformed in some way
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malformed_sob = False
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# The Signed-off-by tag value
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sob = None
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# Whether a patch looks like a CVE but doesn't have a CVE tag
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missing_cve = False
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def blame_patch(patch):
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"""
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From a patch filename, return a list of "commit summary (author name <author
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email>)" strings representing the history.
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"""
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import subprocess
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return subprocess.check_output(("git", "log",
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"--follow", "--find-renames", "--diff-filter=A",
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"--format=%s (%aN <%aE>)",
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"--", patch)).decode("utf-8").splitlines()
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def patchreview(patches):
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import re
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# General pattern: start of line, optional whitespace, tag with optional
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# hyphen or spaces, maybe a colon, some whitespace, then the value, all case
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# insensitive.
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sob_re = re.compile(r"^[\t ]*(Signed[-_ ]off[-_ ]by:?)[\t ]*(.+)", re.IGNORECASE | re.MULTILINE)
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status_re = re.compile(r"^[\t ]*(Upstream[-_ ]Status:?)[\t ]*(\w*)", re.IGNORECASE | re.MULTILINE)
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status_values = ("accepted", "pending", "inappropriate", "backport", "submitted", "denied")
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cve_tag_re = re.compile(r"^[\t ]*(CVE:)[\t ]*(.*)", re.IGNORECASE | re.MULTILINE)
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cve_re = re.compile(r"cve-[0-9]{4}-[0-9]{4,6}", re.IGNORECASE)
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results = {}
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for patch in patches:
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result = Result()
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results[patch] = result
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content = open(patch, encoding='ascii', errors='ignore').read()
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# Find the Signed-off-by tag
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match = sob_re.search(content)
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if match:
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value = match.group(1)
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if value != "Signed-off-by:":
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result.malformed_sob = value
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result.sob = match.group(2)
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else:
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result.missing_sob = True
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# Find the Upstream-Status tag
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match = status_re.search(content)
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if match:
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value = match.group(1)
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if value != "Upstream-Status:":
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result.malformed_upstream_status = value
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value = match.group(2).lower()
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# TODO: check case
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if value not in status_values:
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result.unknown_upstream_status = True
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result.upstream_status = value
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else:
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result.missing_upstream_status = True
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# Check that patches which looks like CVEs have CVE tags
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if cve_re.search(patch) or cve_re.search(content):
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if not cve_tag_re.search(content):
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result.missing_cve = True
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# TODO: extract CVE list
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return results
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def analyse(results, want_blame=False, verbose=True):
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"""
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want_blame: display blame data for each malformed patch
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verbose: display per-file results instead of just summary
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"""
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# want_blame requires verbose, so disable blame if we're not verbose
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if want_blame and not verbose:
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want_blame = False
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total_patches = 0
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missing_sob = 0
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malformed_sob = 0
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missing_status = 0
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malformed_status = 0
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missing_cve = 0
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pending_patches = 0
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for patch in sorted(results):
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r = results[patch]
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total_patches += 1
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need_blame = False
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# Build statistics
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if r.missing_sob:
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missing_sob += 1
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if r.malformed_sob:
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malformed_sob += 1
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if r.missing_upstream_status:
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missing_status += 1
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if r.malformed_upstream_status or r.unknown_upstream_status:
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malformed_status += 1
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if r.missing_cve:
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missing_cve += 1
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if r.upstream_status == "pending":
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pending_patches += 1
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# Output warnings
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if r.missing_sob:
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need_blame = True
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if verbose:
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print("Missing Signed-off-by tag (%s)" % patch)
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# TODO: disable this for now as too much fails
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if False and r.malformed_sob:
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need_blame = True
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if verbose:
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print("Malformed Signed-off-by '%s' (%s)" % (r.malformed_sob, patch))
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if r.missing_cve:
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need_blame = True
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if verbose:
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print("Missing CVE tag (%s)" % patch)
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if r.missing_upstream_status:
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need_blame = True
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if verbose:
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print("Missing Upstream-Status tag (%s)" % patch)
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if r.malformed_upstream_status:
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need_blame = True
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if verbose:
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print("Malformed Upstream-Status '%s' (%s)" % (r.malformed_upstream_status, patch))
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if r.unknown_upstream_status:
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need_blame = True
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if verbose:
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print("Unknown Upstream-Status value '%s' (%s)" % (r.upstream_status, patch))
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if want_blame and need_blame:
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print("\n".join(blame_patch(patch)) + "\n")
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def percent(num):
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try:
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return "%d (%d%%)" % (num, round(num * 100.0 / total_patches))
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except ZeroDivisionError:
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return "N/A"
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if verbose:
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print()
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print("""Total patches found: %d
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Patches missing Signed-off-by: %s
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Patches with malformed Signed-off-by: %s
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Patches missing CVE: %s
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Patches missing Upstream-Status: %s
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Patches with malformed Upstream-Status: %s
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Patches in Pending state: %s""" % (total_patches,
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percent(missing_sob),
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percent(malformed_sob),
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percent(missing_cve),
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percent(missing_status),
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percent(malformed_status),
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percent(pending_patches)))
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def histogram(results):
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from toolz import recipes, dicttoolz
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import math
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counts = recipes.countby(lambda r: r.upstream_status, results.values())
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bars = dicttoolz.valmap(lambda v: "#" * int(math.ceil(float(v) / len(results) * 100)), counts)
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for k in bars:
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print("%-20s %s (%d)" % (k.capitalize() if k else "No status", bars[k], counts[k]))
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if __name__ == "__main__":
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import argparse, subprocess, os
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args = argparse.ArgumentParser(description="Patch Review Tool")
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args.add_argument("-b", "--blame", action="store_true", help="show blame for malformed patches")
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args.add_argument("-v", "--verbose", action="store_true", help="show per-patch results")
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args.add_argument("-g", "--histogram", action="store_true", help="show patch histogram")
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args.add_argument("directory", nargs="?", help="directory to scan")
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args = args.parse_args()
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if args.directory:
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os.chdir(args.directory)
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patches = subprocess.check_output(("git", "ls-files", "*.patch", "*.diff")).decode("utf-8").split()
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results = patchreview(patches)
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analyse(results, want_blame=args.blame, verbose=args.verbose)
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if args.histogram:
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print()
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histogram(results)
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