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tools: add find-inactive-collaborators.js #39262

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Jul 8, 2021
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95 changes: 95 additions & 0 deletions tools/find-inactive-collaborators.mjs
Original file line number Diff line number Diff line change
@@ -0,0 +1,95 @@
#!/usr/bin/env node

// Identify inactive collaborators. "Inactive" is not quite right, as the things
// this checks for are not the entirety of collaborator activities. Still, it is
// a pretty good proxy. Feel free to suggest or implement further metrics.

import cp from 'node:child_process';
import fs from 'node:fs';
import readline from 'node:readline';

const SINCE = process.argv[2] || '6 months ago';

async function runGitCommand(cmd, mapFn) {
const childProcess = cp.spawn('/bin/sh', ['-c', cmd], {
cwd: new URL('..', import.meta.url),
encoding: 'utf8',
stdio: ['inherit', 'pipe', 'inherit'],
});
const lines = readline.createInterface({
input: childProcess.stdout,
});
const errorHandler = new Promise(
(_, reject) => childProcess.on('error', reject)
);
const returnedSet = new Set();
await Promise.race([errorHandler, Promise.resolve()]);
for await (const line of lines) {
await Promise.race([errorHandler, Promise.resolve()]);
const val = mapFn(line);
if (val) {
returnedSet.add(val);
}
}
return Promise.race([errorHandler, Promise.resolve(returnedSet)]);
}

// Get all commit authors during the time period.
const authors = await runGitCommand(
`git shortlog -n -s --since="${SINCE}"`,
(line) => line.trim().split('\t', 2)[1]
);

// Get all commit landers during the time period.
const landers = await runGitCommand(
`git shortlog -n -s -c --since="${SINCE}"`,
(line) => line.trim().split('\t', 2)[1]
);

// Get all approving reviewers of landed commits during the time period.
const approvingReviewers = await runGitCommand(
`git log --since="${SINCE}" | egrep "^ Reviewed-By: "`,
(line) => /^ Reviewed-By: ([^<]+)/.exec(line)[1].trim()
);

async function retrieveCollaboratorsFromReadme() {
const readmeText = readline.createInterface({
input: fs.createReadStream(new URL('../README.md', import.meta.url)),
crlfDelay: Infinity,
});
const returnedArray = [];
let processingCollaborators = false;
for await (const line of readmeText) {
const isCollaborator = processingCollaborators && line.length;
if (line === '### Collaborators') {
processingCollaborators = true;
}
if (line === '### Collaborator emeriti') {
processingCollaborators = false;
break;
}
if (line.startsWith('**') && isCollaborator) {
returnedArray.push(line.split('**', 2)[1].trim());
}
}
return returnedArray;
}

// Get list of current collaborators from README.md.
const collaborators = await retrieveCollaboratorsFromReadme();

console.log(`${authors.size.toLocaleString()} authors have made commits since ${SINCE}.`);
console.log(`${landers.size.toLocaleString()} landers have landed commits since ${SINCE}.`);
console.log(`${approvingReviewers.size.toLocaleString()} reviewers have approved landed commits since ${SINCE}.`);
console.log(`${collaborators.length.toLocaleString()} collaborators currently in the project.`);

const inactive = collaborators.filter((collaborator) =>
!authors.has(collaborator) &&
!landers.has(collaborator) &&
!approvingReviewers.has(collaborator)
);

if (inactive.length) {
console.log('\nInactive collaborators:');
console.log(inactive.join('\n'));
}