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| 1 | +#!/usr/bin/env python3 |
| 2 | +from __future__ import annotations |
| 3 | + |
| 4 | +import argparse |
| 5 | +import json |
| 6 | +import re |
| 7 | +import subprocess |
| 8 | +import sys |
| 9 | +from pathlib import Path |
| 10 | + |
| 11 | +TAG_PATTERN = re.compile(r"^v(\d+)\.(\d+)\.(\d+)$") |
| 12 | +VERSION_PATTERN = re.compile(r"^(\d+)\.(\d+)\.(\d+)$") |
| 13 | + |
| 14 | + |
| 15 | +def extract_workspace_version(cargo_toml: str) -> str | None: |
| 16 | + in_workspace_package = False |
| 17 | + for raw_line in cargo_toml.splitlines(): |
| 18 | + line = raw_line.strip() |
| 19 | + if line.startswith("[") and line.endswith("]"): |
| 20 | + in_workspace_package = line == "[workspace.package]" |
| 21 | + continue |
| 22 | + if not in_workspace_package: |
| 23 | + continue |
| 24 | + m = re.match(r'version\s*=\s*"([^"]+)"', line) |
| 25 | + if m: |
| 26 | + return m.group(1) |
| 27 | + return None |
| 28 | + |
| 29 | + |
| 30 | +def changelog_has_version_section(changelog_text: str, version: str) -> bool: |
| 31 | + pattern = re.compile(rf"^##\s*\[{re.escape(version)}\](?:\s*-.*)?\s*$", re.MULTILINE) |
| 32 | + return pattern.search(changelog_text) is not None |
| 33 | + |
| 34 | + |
| 35 | +def parse_version(version: str) -> tuple[int, int, int] | None: |
| 36 | + m = VERSION_PATTERN.fullmatch(version.strip()) |
| 37 | + if not m: |
| 38 | + return None |
| 39 | + return tuple(int(part) for part in m.groups()) |
| 40 | + |
| 41 | + |
| 42 | +def parse_tag(tag: str) -> tuple[int, int, int] | None: |
| 43 | + m = TAG_PATTERN.fullmatch(tag.strip()) |
| 44 | + if not m: |
| 45 | + return None |
| 46 | + return tuple(int(part) for part in m.groups()) |
| 47 | + |
| 48 | + |
| 49 | +def latest_semver_tag(tags: list[str]) -> str | None: |
| 50 | + parsed: list[tuple[tuple[int, int, int], str]] = [] |
| 51 | + for tag in tags: |
| 52 | + version = parse_tag(tag) |
| 53 | + if version is None: |
| 54 | + continue |
| 55 | + parsed.append((version, tag.strip())) |
| 56 | + if not parsed: |
| 57 | + return None |
| 58 | + parsed.sort() |
| 59 | + return parsed[-1][1] |
| 60 | + |
| 61 | + |
| 62 | +def decide_release_tag( |
| 63 | + *, |
| 64 | + workspace_version: str, |
| 65 | + changelog_text: str, |
| 66 | + existing_tags: list[str], |
| 67 | +) -> tuple[bool, str | None, str]: |
| 68 | + parsed_workspace = parse_version(workspace_version) |
| 69 | + if parsed_workspace is None: |
| 70 | + raise ValueError( |
| 71 | + f"workspace version '{workspace_version}' must match X.Y.Z before auto release tagging." |
| 72 | + ) |
| 73 | + |
| 74 | + exact_tag = f"v{workspace_version}" |
| 75 | + normalized_tags = [tag.strip() for tag in existing_tags if tag.strip()] |
| 76 | + if exact_tag in normalized_tags: |
| 77 | + return False, None, f"release tag {exact_tag} already exists; nothing to do." |
| 78 | + |
| 79 | + latest_tag = latest_semver_tag(normalized_tags) |
| 80 | + if latest_tag is not None: |
| 81 | + latest_version = parse_tag(latest_tag) |
| 82 | + assert latest_version is not None |
| 83 | + if parsed_workspace < latest_version: |
| 84 | + raise ValueError( |
| 85 | + f"workspace version {workspace_version} is behind latest release tag {latest_tag}." |
| 86 | + ) |
| 87 | + if parsed_workspace == latest_version: |
| 88 | + return ( |
| 89 | + False, |
| 90 | + None, |
| 91 | + f"latest release tag version already matches workspace version ({latest_tag}); nothing to do.", |
| 92 | + ) |
| 93 | + |
| 94 | + if not changelog_has_version_section(changelog_text, workspace_version): |
| 95 | + raise ValueError( |
| 96 | + f"CHANGELOG.md is missing section [{workspace_version}] required for auto release tagging." |
| 97 | + ) |
| 98 | + |
| 99 | + return True, exact_tag, f"create release tag {exact_tag} for workspace version {workspace_version}." |
| 100 | + |
| 101 | + |
| 102 | +def load_git_tags(repo_root: Path) -> list[str]: |
| 103 | + output = subprocess.run( |
| 104 | + ["git", "tag", "--list"], |
| 105 | + cwd=repo_root, |
| 106 | + check=True, |
| 107 | + capture_output=True, |
| 108 | + text=True, |
| 109 | + ) |
| 110 | + return [line.strip() for line in output.stdout.splitlines() if line.strip()] |
| 111 | + |
| 112 | + |
| 113 | +def main(argv: list[str]) -> int: |
| 114 | + parser = argparse.ArgumentParser( |
| 115 | + description="Resolve whether the current main tip should auto-create a GitHub release tag." |
| 116 | + ) |
| 117 | + parser.add_argument("--cargo-toml", default="Cargo.toml") |
| 118 | + parser.add_argument("--changelog", default="CHANGELOG.md") |
| 119 | + args = parser.parse_args(argv) |
| 120 | + |
| 121 | + repo_root = Path(__file__).resolve().parents[1] |
| 122 | + cargo_path = (repo_root / args.cargo_toml).resolve() |
| 123 | + changelog_path = (repo_root / args.changelog).resolve() |
| 124 | + |
| 125 | + try: |
| 126 | + cargo_text = cargo_path.read_text(encoding="utf-8") |
| 127 | + changelog_text = changelog_path.read_text(encoding="utf-8") |
| 128 | + existing_tags = load_git_tags(repo_root) |
| 129 | + except subprocess.CalledProcessError as err: |
| 130 | + print(f"error: failed to inspect git tags: {err}", file=sys.stderr) |
| 131 | + return 2 |
| 132 | + except OSError as err: |
| 133 | + print(f"error: failed to read release metadata files: {err}", file=sys.stderr) |
| 134 | + return 2 |
| 135 | + |
| 136 | + workspace_version = extract_workspace_version(cargo_text) |
| 137 | + if workspace_version is None: |
| 138 | + print("error: failed to parse [workspace.package].version from Cargo.toml.", file=sys.stderr) |
| 139 | + return 2 |
| 140 | + |
| 141 | + try: |
| 142 | + should_tag, tag, reason = decide_release_tag( |
| 143 | + workspace_version=workspace_version, |
| 144 | + changelog_text=changelog_text, |
| 145 | + existing_tags=existing_tags, |
| 146 | + ) |
| 147 | + except ValueError as err: |
| 148 | + print(f"error: {err}", file=sys.stderr) |
| 149 | + return 1 |
| 150 | + |
| 151 | + json.dump( |
| 152 | + { |
| 153 | + "should_tag": should_tag, |
| 154 | + "tag": tag, |
| 155 | + "reason": reason, |
| 156 | + "workspace_version": workspace_version, |
| 157 | + "latest_semver_tag": latest_semver_tag(existing_tags), |
| 158 | + }, |
| 159 | + sys.stdout, |
| 160 | + ) |
| 161 | + sys.stdout.write("\n") |
| 162 | + return 0 |
| 163 | + |
| 164 | + |
| 165 | +if __name__ == "__main__": |
| 166 | + raise SystemExit(main(sys.argv[1:])) |
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