| 1 |
#!/usr/bin/env node |
| 2 |
|
| 3 |
/** |
| 4 |
* Copyright (C) 2024 OSN, Inc. |
| 5 |
* |
| 6 |
* This program is free software: you can redistribute it and/or modify |
| 7 |
* it under the terms of the GNU General Public License as published by |
| 8 |
* the Free Software Foundation, either version 3 of the License, or |
| 9 |
* (at your option) any later version. |
| 10 |
* |
| 11 |
* This program is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
* GNU General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU General Public License |
| 17 |
* along with this program. If not, see <https://www.gnu.org/licenses/>. |
| 18 |
*/ |
| 19 |
|
| 20 |
"use strict"; |
| 21 |
|
| 22 |
const path = require("path"); |
| 23 |
const { existsSync } = require("fs"); |
| 24 |
const { exit } = require("process"); |
| 25 |
const { execSync } = require("child_process"); |
| 26 |
const { writeFile } = require("fs/promises"); |
| 27 |
const { parseArgs } = require("util"); |
| 28 |
|
| 29 |
const ME = path.basename(process.argv[1]); |
| 30 |
|
| 31 |
function print(...args) { |
| 32 |
console.log(`${ME}: ${args.join(" ")}`); |
| 33 |
} |
| 34 |
|
| 35 |
function perror(...args) { |
| 36 |
console.error(`\x1b[0m${ME}: error: ${args.join(" ")}`); |
| 37 |
} |
| 38 |
|
| 39 |
function findInPath(executable) { |
| 40 |
for (const segment of process.env.PATH?.split( |
| 41 |
process.platform === "win32" ? ";" : ":" |
| 42 |
) ?? []) { |
| 43 |
const executablePath = path.join( |
| 44 |
segment, |
| 45 |
executable + (process.platform === "win32" ? ".exe" : "") |
| 46 |
); |
| 47 |
|
| 48 |
if (existsSync(executablePath)) { |
| 49 |
return executablePath; |
| 50 |
} |
| 51 |
} |
| 52 |
|
| 53 |
return null; |
| 54 |
} |
| 55 |
|
| 56 |
function checkForGit() { |
| 57 |
const gitPath = findInPath("git"); |
| 58 |
|
| 59 |
if (!gitPath) { |
| 60 |
perror("could not find git in $PATH"); |
| 61 |
perror("please make sure git is installed and available in $PATH"); |
| 62 |
exit(1); |
| 63 |
} |
| 64 |
|
| 65 |
return gitPath; |
| 66 |
} |
| 67 |
|
| 68 |
function getGitLog(gitPath) { |
| 69 |
try { |
| 70 |
return execSync(gitPath + " --no-pager log", { encoding: "utf8" }); |
| 71 |
} catch { |
| 72 |
perror("command `git --no-pager log' failed"); |
| 73 |
exit(1); |
| 74 |
} |
| 75 |
} |
| 76 |
|
| 77 |
function parseGitLog(gitLog) { |
| 78 |
const lines = gitLog.split("\n"); |
| 79 |
const commits = []; |
| 80 |
|
| 81 |
for (let i = 0; i < lines.length; ) { |
| 82 |
if (!lines[i].startsWith("commit")) { |
| 83 |
i++; |
| 84 |
continue; |
| 85 |
} |
| 86 |
|
| 87 |
const [, hash] = lines[i++].split(" "); |
| 88 |
const headerProps = {}; |
| 89 |
|
| 90 |
while ( |
| 91 |
i < lines.length && |
| 92 |
lines[i].trim() !== "" && |
| 93 |
!/^\s/.test(lines[i]) |
| 94 |
) { |
| 95 |
const colonIndex = lines[i].indexOf(":"); |
| 96 |
const name = lines[i].slice(0, colonIndex).toLowerCase(); |
| 97 |
const value = lines[i].slice(colonIndex + 1).trim(); |
| 98 |
headerProps[name] = value; |
| 99 |
i++; |
| 100 |
} |
| 101 |
|
| 102 |
const messageLines = []; |
| 103 |
|
| 104 |
while (i < lines.length && !lines[i].startsWith("commit")) { |
| 105 |
const lineToPush = lines[i++].replace(/^ /, ""); |
| 106 |
|
| 107 |
if (!lineToPush) { |
| 108 |
continue; |
| 109 |
} |
| 110 |
|
| 111 |
messageLines.push(lineToPush); |
| 112 |
} |
| 113 |
|
| 114 |
let mindex = messageLines.length - 1; |
| 115 |
const footerProps = {}; |
| 116 |
const validFooterProps = [ |
| 117 |
"signed-off-by", |
| 118 |
"co-authored-by", |
| 119 |
"on-behalf-of", |
| 120 |
]; |
| 121 |
|
| 122 |
while ( |
| 123 |
mindex >= 1 && |
| 124 |
/^[A-Za-z0-9-]+: /.test(messageLines.at(mindex)) |
| 125 |
) { |
| 126 |
const messageLine = messageLines[mindex--]; |
| 127 |
const colonIndex = messageLine.indexOf(":"); |
| 128 |
const name = messageLine.slice(0, colonIndex).toLowerCase(); |
| 129 |
|
| 130 |
if (!validFooterProps.includes(name)) { |
| 131 |
continue; |
| 132 |
} |
| 133 |
|
| 134 |
const value = messageLine.slice(colonIndex + 1).trim(); |
| 135 |
|
| 136 |
if (name in footerProps && !Array.isArray(footerProps[name])) { |
| 137 |
footerProps[name] = [footerProps[name]]; |
| 138 |
} |
| 139 |
|
| 140 |
if (Array.isArray(footerProps[name])) { |
| 141 |
footerProps[name].push(value); |
| 142 |
} else { |
| 143 |
footerProps[name] = value; |
| 144 |
} |
| 145 |
|
| 146 |
messageLines.splice(mindex - 1, 1); |
| 147 |
} |
| 148 |
|
| 149 |
const message = messageLines.join("\n"); |
| 150 |
|
| 151 |
commits.push({ |
| 152 |
hash, |
| 153 |
message, |
| 154 |
headerProps, |
| 155 |
footerProps, |
| 156 |
signedOffBy: footerProps["signed-off-by"], |
| 157 |
onBehalfOf: footerProps["on-behalf-of"], |
| 158 |
author: headerProps["author"], |
| 159 |
createdAt: new Date(headerProps["date"]), |
| 160 |
}); |
| 161 |
} |
| 162 |
|
| 163 |
return commits; |
| 164 |
} |
| 165 |
|
| 166 |
function generateChangelog(commits) { |
| 167 |
let output = ""; |
| 168 |
|
| 169 |
const grouppedCommitsByDate = {}; |
| 170 |
|
| 171 |
for (const commit of commits) { |
| 172 |
const key = `${commit.createdAt |
| 173 |
.getUTCDate() |
| 174 |
.toString() |
| 175 |
.padStart(2, 0)}-${commit.createdAt |
| 176 |
.getUTCMonth() |
| 177 |
.toString() |
| 178 |
.padStart(2, "0")}-${commit.createdAt.getUTCFullYear()}::${ |
| 179 |
Array.isArray(commit.author) |
| 180 |
? commit.author.join(":") |
| 181 |
: commit.author |
| 182 |
}`; |
| 183 |
grouppedCommitsByDate[key] ??= []; |
| 184 |
grouppedCommitsByDate[key].push(commit); |
| 185 |
} |
| 186 |
|
| 187 |
for (const key in grouppedCommitsByDate) { |
| 188 |
const separatorPosition = key.indexOf("::"); |
| 189 |
const date = key.slice(0, separatorPosition); |
| 190 |
const commits = grouppedCommitsByDate[key]; |
| 191 |
|
| 192 |
output += `${date} ${ |
| 193 |
Array.isArray(commits[0].author) |
| 194 |
? commits[0].author.join(", ") |
| 195 |
: commits[0].author |
| 196 |
}\n\n`; |
| 197 |
|
| 198 |
for (const commit of commits) { |
| 199 |
output += ` ${commit.message.replaceAll( |
| 200 |
"\n", |
| 201 |
"\n " |
| 202 |
)}\n\n`; |
| 203 |
} |
| 204 |
} |
| 205 |
|
| 206 |
return output.trim(); |
| 207 |
} |
| 208 |
|
| 209 |
function printHelp() { |
| 210 |
console.log("Usage:"); |
| 211 |
console.log(` ${ME} [OPTION]...`); |
| 212 |
console.log("Generate a formatted ChangeLog from Git commit logs."); |
| 213 |
console.log(); |
| 214 |
console.log("Options:"); |
| 215 |
console.log(" -h, --help Show this help and exit."); |
| 216 |
console.log(" -v, --version Show this script's version."); |
| 217 |
console.log(" -o, --output=[FILE] Write the generated changelog to"); |
| 218 |
console.log(" a file instead of standard output."); |
| 219 |
console.log(" --no-overwrite Disallow overwriting of the output"); |
| 220 |
console.log(" file if it exists already."); |
| 221 |
console.log(); |
| 222 |
console.log("Send general inquiries, questions and bug reports"); |
| 223 |
console.log("to <[email protected]>."); |
| 224 |
} |
| 225 |
|
| 226 |
function printVersion() { |
| 227 |
console.log("Copyright (C) 2024 OSN, Inc."); |
| 228 |
console.log( |
| 229 |
"License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>." |
| 230 |
); |
| 231 |
console.log( |
| 232 |
"This is free software: you are free to change and redistribute it." |
| 233 |
); |
| 234 |
console.log("There is NO WARRANTY, to the extent permitted by law."); |
| 235 |
console.log(); |
| 236 |
console.log("Written by Ar Rakin."); |
| 237 |
} |
| 238 |
|
| 239 |
async function main() { |
| 240 |
let options; |
| 241 |
|
| 242 |
try { |
| 243 |
options = parseArgs({ |
| 244 |
argv: process.argv.slice(1), |
| 245 |
strict: true, |
| 246 |
allowPositionals: false, |
| 247 |
options: { |
| 248 |
help: { |
| 249 |
type: "boolean", |
| 250 |
alias: "h", |
| 251 |
}, |
| 252 |
version: { |
| 253 |
type: "boolean", |
| 254 |
alias: "v", |
| 255 |
}, |
| 256 |
output: { |
| 257 |
type: "string", |
| 258 |
short: "o", |
| 259 |
}, |
| 260 |
"no-overwrite": { |
| 261 |
type: "boolean", |
| 262 |
}, |
| 263 |
}, |
| 264 |
}).values; |
| 265 |
} catch (error) { |
| 266 |
perror(`${error?.message ?? error}`); |
| 267 |
exit(1); |
| 268 |
} |
| 269 |
|
| 270 |
if (options.help) { |
| 271 |
printHelp(); |
| 272 |
exit(0); |
| 273 |
} |
| 274 |
|
| 275 |
if (options.version) { |
| 276 |
printVersion(); |
| 277 |
exit(0); |
| 278 |
} |
| 279 |
|
| 280 |
if (!options.output && options["no-overwrite"]) { |
| 281 |
perror( |
| 282 |
"option `--no-overwrite' without `--output` does not make sense" |
| 283 |
); |
| 284 |
exit(1); |
| 285 |
} |
| 286 |
|
| 287 |
if ( |
| 288 |
options.output && |
| 289 |
options["no-overwrite"] && |
| 290 |
existsSync(options.output) |
| 291 |
) { |
| 292 |
perror(`${options.output}: cannot write changelog: File exists`); |
| 293 |
exit(1); |
| 294 |
} |
| 295 |
|
| 296 |
const gitPath = checkForGit(); |
| 297 |
const gitLog = getGitLog(gitPath); |
| 298 |
const commits = parseGitLog(gitLog); |
| 299 |
const filteredCommits = commits.filter( |
| 300 |
(commit) => |
| 301 |
!/Merge pull request #\d+ from|Merge branch '\S+' of/.test( |
| 302 |
commit.message |
| 303 |
) |
| 304 |
); |
| 305 |
const changelog = generateChangelog(filteredCommits); |
| 306 |
|
| 307 |
if (options.output) { |
| 308 |
try { |
| 309 |
await writeFile(options.output, changelog); |
| 310 |
} catch (error) { |
| 311 |
perror( |
| 312 |
`${options.output}: failed to write changelog: ${ |
| 313 |
error?.message ?? error |
| 314 |
}` |
| 315 |
); |
| 316 |
exit(1); |
| 317 |
} |
| 318 |
|
| 319 |
print(`wrote generated changelog to ${options.output}`); |
| 320 |
} else { |
| 321 |
console.log(changelog); |
| 322 |
} |
| 323 |
} |
| 324 |
|
| 325 |
main(); |
Parent Directory
| 
Revision Log