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matrix-spec/scripts/proposals.js

220 lines
5.8 KiB
JavaScript

"use strict";
/**
* This Node script fetches MSC proposals and stores them in /data/msc,
* so they can be used by a Hugo template to render summary tables of them
* in the specification.
*
* In detail, it:
* - fetches all GitHub issues from matrix-doc that have the `proposal` label
* - groups them by their state in the MSC process
* - does some light massaging of them so it's easier for the Hugo template to work with them
* - store them at /data/msc
*/
// built-in modules
const path = require('path');
const fs = require('fs');
// third-party modules
const fetch = require('node-fetch');
// We will write proposals into the /data/msc directory
const outputDir = path.join(__dirname, "../data/msc");
/**
* This defines the different proposal lifecycle states.
* Each state has:
* - `label`: a GitHub label used to identify issues in this state
* - `title`: used for things like headings in renderings of the proposals
*/
const states = [
{
label: "proposal-in-review",
title: "Proposal In Review"
},
{
label: "proposed-final-comment-period",
title: "Proposed Final Comment Period"
},
{
label: "final-comment-period",
title: "Final Comment Period"
},
{
label: "finished-final-comment-period",
title: "Finished Final Comment Period"
},
{
label: "spec-pr-missing",
title: "Spec PR Missing"
},
{
label: "spec-pr-in-review",
title: "Spec PR In Review"
},
{
label: "merged",
title: "Merged"
},
{
label: "proposal-postoned",
title: "Postponed"
},
{
label: "abandoned",
title: "Abandoned"
},
{
label: "obsolete",
title: "Obsolete"
}
];
let issues = [];
/**
* Fetch all the MSC proposals from GitHub.
*
* GitHub only lets us fetch 100 items at a time, and it gives us a `link`
* response header containing the URL for the next batch.
* So we will keep fetching until the response doesn't contain the "next" link.
*/
async function getIssues() {
/**
* A pretty ugly function to get us the "next" link in the header if there
* was one, or `null` otherwise.
*/
function getNextLink(header) {
const links = header.split(",");
for (const link of links) {
const linkPieces = link.split(";");
if (linkPieces[1] == ` rel=\"next\"`) {
const next = linkPieces[0].trim();
return next.substring(1, next.length-1);
}
}
return null;
}
let pageLink = "https://api.github.com/repos/matrix-org/matrix-doc/issues?state=all&labels=proposal&per_page=100";
while (pageLink) {
const response = await fetch(pageLink);
const issuesForPage = await response.json();
issues = issues.concat(issuesForPage);
const linkHeader = response.headers.get("link");
pageLink = getNextLink(linkHeader);
}
}
getIssues().then(processIssues);
/**
* Rather than just store the complete issue, we'll extract
* only the pieces we need.
* We'll also do some transformation of the issues, jsut because
* it's easier to do in JS than in the template.
*/
function getProposalFromIssue(issue) {
/**
* A helper function to fetch the contents of special
* directives in the issue body.
* Looks for a directive in the format:
* `^${directiveName}: (.+?)$`, returning the matched
* part or null if the directive wasn't found.
*/
function getDirective(directiveName, issue) {
const re = new RegExp(`^${directiveName}: (.+?)$`, "m");
const found = issue.body.match(re);
return found? found[1]: null;
}
function getDocumentation(issue) {
const found = getDirective("Documentation", issue);
if (found) {
return found.split(",").map(a => a.trim());
} else {
return [];
}
}
function getAuthors(issue) {
const found = getDirective("Author", issue);
if (found) {
return found.split(",").map(a => a.trim().substr(1));
} else {
return [`${issue.user.login}`];
}
}
function getShepherd(issue) {
const found = getDirective("Shepherd", issue);
if (found) {
return found.substr(1);
} else {
return null;
}
}
return {
number: issue.number,
url: issue.html_url,
title: issue.title,
created_at: issue.created_at.substr(0, 10),
updated_at: issue.updated_at.substr(0, 10),
authors: getAuthors(issue),
shepherd: getShepherd(issue),
documentation: getDocumentation(issue)
}
}
/**
* Returns the intersection of two arrays.
*/
function intersection(array1, array2) {
return array1.filter(i => array2.includes(i));
}
/**
* Given all the GitHub issues with a "proposal" label:
* - group issues by the state they are in, and for each group:
* - extract the bits we need from each issue
* - write the result under /data/msc
*/
function processIssues() {
if (!fs.existsSync(outputDir)){
fs.mkdirSync(outputDir);
}
const output = [];
// make a group of "work in progress" proposals,
// which are identified by not having any of the state labels
const stateLabels = states.map(s => s.label);
const worksInProgress = issues.filter(issue => {
const labelsForIssue = issue.labels.map(l => l.name);
return intersection(labelsForIssue, stateLabels).length === 0;
});
output.push({
title: "Work In Progress",
label: "work-in-progress",
proposals: worksInProgress.map(issue => getProposalFromIssue(issue))
});
// for each defined state
for (const state of states) {
// get the set of issues for that state
const issuesForState = issues.filter(msc => {
return msc.labels.some(l => l.name === state.label);
});
// store it in /data
output.push({
title: state.title,
label: state.label,
proposals: issuesForState.map(issue => getProposalFromIssue(issue))
});
}
const outputData = JSON.stringify(output, null, '\t');
const outputFile = path.join(outputDir, `proposals.json`);
fs.writeFileSync(outputFile, outputData);
}