changelog.js
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const {execSync} = require('child_process');
let [start, end] = process.argv.slice(2);
if (!start || !end) {
console.error('Must provide start and end tags');
console.error(' eg: v1.0 HEAD');
console.error(' eg: v1.0 v2.0');
process.exit(1);
}
const separator = `===END===`;
const res = execSync(`git log -E --format=%H%n%s%b===END=== ${start}..${end}`);
const sep = res.toString().split(separator);
const output = sep
.map((item, i) => {
const [hash, ...body] = getParts(item, i);
const bodyJoined = body.join('\n');
return [hash, bodyJoined];
})
// .filter(([, body]) => )
.map(([hash, bodyJoined]) => {
const hasSection = /^[\w]+: [^ ]/.test(bodyJoined);
if (hasSection) {
const [section, body] = bodyJoined.split(/: /);
return [hash, section, body];
}
return [hash, 'misc', bodyJoined];
})
.reduce((acc, item) => {
const [, section] = item;
if (!acc[section]) {
acc[section] = [item];
} else {
acc[section].push(item);
}
return acc;
}, {});
if (process.argv.indexOf('--json') > -1) {
console.log(JSON.stringify(output, null, 2));
} else {
Object.keys(output)
.map(x => [x, output[x]])
.forEach(([section, items]) => {
const header = `**${section}**`;
console.log(header);
items.forEach(([hash, section, body]) => {
console.log(`- ${body} ${hash}`)
});
console.log('')
});
}
function getParts(item, index) {
const segs = item.split('\n');
if (index === 0) return segs;
return segs.slice(1);
}