contrib/relnotes

obsolete: allow multiple predecessors in createmarkers

The logic for this change is similar to the change to `cleanupnodes` that we
did earlier. Now that the rebase code is trying to record a fold, we need to
actually record it in the markers. The first step is to have the markers
creation API able to receive such fold data.

To keep things sane, we restrict fold to on successors.

#!/usr/bin/env python3
"""Generate release notes from our commit log.

This uses the relnotes extension directives when they're available,
and falls back to our old pre-relnotes logic that used to live in the
release-tools repo.
"""
import argparse
import re
import subprocess

# Regenerate this list with
#   hg export 'grep("\.\. [a-z]+::")' | grep '^\.\.' | \
#     sed 's/.. //;s/::.*//' | sort -u
rnsections = ["api", "bc", "container", "feature", "fix", "note", "perf"]

rules = {
    # keep
    r"\(issue": 100,
    r"\(BC\)": 100,
    r"\(API\)": 100,
    # core commands, bump up
    r"(commit|files|log|pull|push|patch|status|tag|summary)(|s|es):": 20,
    r"(annotate|alias|branch|bookmark|clone|graft|import|verify).*:": 20,
    # extensions, bump up
    r"(mq|shelve|rebase):": 20,
    # newsy
    r": deprecate": 20,
    r"(option|feature|command|support)": 10,
    # bug-like?
    r"(fix|don't break|improve)": 7,
    # boring stuff, bump down
    r"^contrib": -5,
    r"debug": -5,
    r"help": -5,
    r"(doc|bundle2|obsolete|obsmarker|rpm|setup|debug\S+:)": -15,
    r"(check-code|check-commit|import-checker)": -20,
    # cleanups and refactoring
    r"(cleanup|whitespace|nesting|indent|spelling|comment)": -20,
    r"(typo|hint|note|style:|correct doc)": -20,
    r"_": -10,
    r"(argument|absolute_import|attribute|assignment|mutable)": -15,
    r"(unused|useless|unnecessary|duplicate|deprecated|scope|True|False)": -10,
    r"(redundant|pointless|confusing|uninitialized|meaningless|dead)": -10,
    r": (drop|remove|inherit|rename|simplify|naming|inline)": -10,
    r"(docstring|document .* method)": -20,
    r"(factor|extract|prepare|split|replace| import)": -20,
    r": add.*(function|method|implementation|test|example)": -10,
    r": (move|extract) .* (to|into|from)": -20,
    r": implement ": -5,
    r": use .* implementation": -20,
    r"\S\S\S+\.\S\S\S\S+": -5,
    r": use .* instead of": -20,
    r"__": -5,
    # dumb keywords
    r"\S+/\S+:": -10,
    r"\S+\.\S+:": -10,
    # drop
    r"^i18n-": -50,
    r"^i18n:.*(hint|comment)": -50,
    r"perf:": -50,
    r"check-code:": -50,
    r"Added.*for changeset": -50,
    r"tests?:": -50,
    r"test-": -50,
    r"add.* tests": -50,
    r"^_": -50,
}

cutoff = 10
commits = []

groupings = [
    (r"util|parsers|repo|ctx|context|revlog|filelog|alias|cmdutil", "core"),
    (r"revset|templater|ui|dirstate|hook|i18n|transaction|wire", "core"),
    (r"color|pager", "core"),
    (r"hgweb|paper|coal|gitweb", "hgweb"),
    (r"pull|push|revert|resolve|annotate|bookmark|branch|clone", "commands"),
    (r"commands|commit|config|files|graft|import|log|merge|patch", "commands"),
    (r"phases|status|summary|amend|tag|help|verify", "commands"),
    (r"rebase|mq|convert|eol|histedit|largefiles", "extensions"),
    (r"shelve|unshelve", "extensions"),
]

def main():
    ap = argparse.ArgumentParser()
    ap.add_argument(
        "startrev",
        metavar="REV",
        type=str,
        nargs=1,
        help=(
            "Starting revision for the release notes. This revision "
            "won't be included, but later revisions will."
        ),
    )
    ap.add_argument(
        "--stoprev",
        metavar="REV",
        type=str,
        default="@",
        nargs=1,
        help=(
            "Stop revision for release notes. This revision will be included,"
            " but no later revisions will. This revision needs to be "
            "a descendant of startrev."
        ),
    )
    args = ap.parse_args()
    fromext = subprocess.check_output(
        [
            "hg",
            "--config",
            "extensions.releasenotes=",
            "releasenotes",
            "-r",
            "%s::%s" % (args.startrev[0], args.stoprev[0]),
        ]
    ).decode("utf-8")
    # Find all release notes from un-relnotes-flagged commits.
    for entry in sorted(
        subprocess.check_output(
            [
                "hg",
                "log",
                "-r",
                r'%s::%s - merge() - grep("\n\.\. (%s)::")'
                % (args.startrev[0], args.stoprev[0], "|".join(rnsections)),
                "-T",
                r"{desc|firstline}\n",
            ]
        )
        .decode("utf-8")
        .splitlines()
    ):
        desc = entry.replace("`", "'")

        score = 0
        for rule, val in rules.items():
            if re.search(rule, desc):
                score += val

        desc = desc.replace("(issue", "(Bts:issue")

        if score >= cutoff:
            commits.append(desc)
    # Group unflagged notes.
    groups = {}
    bcs = []
    apis = []

    for d in commits:
        if "(BC)" in d:
            bcs.append(d)
        if "(API)" in d:
            apis.append(d)
        for rule, g in groupings:
            if re.match(rule, d):
                groups.setdefault(g, []).append(d)
                break
        else:
            groups.setdefault("unsorted", []).append(d)
    print(fromext)
    # print legacy release notes sections
    for g in sorted(groups):
        print("\n=== %s ===" % g)
        for d in sorted(groups[g]):
            print(" * %s" % d)

    print("\n=== BC ===\n")

    for d in sorted(bcs):
        print(" * %s" % d)

    print("\n=== API Changes ===\n")

    for d in sorted(apis):
        print(" * %s" % d)

if __name__ == "__main__":
    main()