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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| // @ts-check | ||
| const cp = require("child_process"); | ||
| /** | ||
| * | ||
| * @param {[string, string[]][]} tasks | ||
| * @param {cp.SpawnSyncOptions} opts | ||
| */ | ||
| function runSequence(tasks, opts = { timeout: 100000, shell: true, stdio: "inherit" }) { | ||
| let lastResult; | ||
| for (const task of tasks) { | ||
| console.log(`${task[0]} ${task[1].join(" ")}`); | ||
| const result = cp.spawnSync(task[0], task[1], opts); | ||
| if (result.status !== 0) throw new Error(`${task[0]} ${task[1].join(" ")} failed: ${result.stderr && result.stderr.toString()}`); | ||
| lastResult = result; | ||
| } | ||
| return lastResult && lastResult.stdout && lastResult.stdout.toString(); | ||
| } | ||
|
|
||
| exports.runSequence = runSequence; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| // @ts-check | ||
| /// <reference lib="esnext.asynciterable" /> | ||
| const Octokit = require("@octokit/rest"); | ||
| const {runSequence} = require("./run-sequence"); | ||
|
|
||
| /** | ||
| * This program should be invoked as `node ./scripts/update-experimental-branches <GithubAccessToken> <Branch1> [Branch2] [...]` | ||
| */ | ||
| async function main() { | ||
| const branchesRaw = process.argv[3]; | ||
| const branches = process.argv.slice(3); | ||
| if (!branches.length) { | ||
| throw new Error(`No experimental branches, aborting...`); | ||
| } | ||
| console.log(`Performing experimental branch updating and merging for branches ${branchesRaw}`); | ||
|
|
||
| const gh = new Octokit(); | ||
| gh.authenticate({ | ||
| type: "token", | ||
| token: process.argv[2] | ||
| }); | ||
|
|
||
| // Fetch all relevant refs | ||
| runSequence([ | ||
| ["git", ["fetch", "origin", "master:master", ...branches.map(b => `${b}:${b}`)]] | ||
| ]) | ||
|
|
||
| // Forcibly cleanup workspace | ||
| runSequence([ | ||
| ["git", ["clean", "-fdx"]], | ||
| ["git", ["checkout", "."]], | ||
| ["git", ["checkout", "master"]], | ||
| ]); | ||
|
|
||
| // Update branches | ||
| for (const branch of branches) { | ||
| // Checkout, then get the merge base | ||
| const mergeBase = runSequence([ | ||
| ["git", ["checkout", branch]], | ||
| ["git", ["merge-base", branch, "master"]], | ||
| ]); | ||
| // Simulate the merge and abort if there are conflicts | ||
| const mergeTree = runSequence([ | ||
| ["git", ["merge-tree", mergeBase, branch, "master"]] | ||
| ]); | ||
| if (mergeTree.indexOf(`===${"="}===`)) { // 7 equals is the center of the merge conflict marker | ||
| const res = await gh.pulls.list({owner: "Microsoft", repo: "TypeScript", base: branch}); | ||
| if (res && res.data && res.data[0]) { | ||
| const pr = res.data[0]; | ||
| await gh.issues.createComment({ | ||
| owner: "Microsoft", | ||
| repo: "TypeScript", | ||
| number: pr.number, | ||
| body: `This PR is configured as an experiment, and currently has merge conflicts with master - please rebase onto master and fix the conflicts.` | ||
| }); | ||
| } | ||
| throw new Error(`Merge conflict detected on branch ${branch} with master`); | ||
| } | ||
| // Merge is good - apply a rebase and (force) push | ||
| runSequence([ | ||
| ["git", ["rebase", "master"]], | ||
| ["git", ["push", "-f", "-u", "origin", branch]], | ||
| ]); | ||
| } | ||
|
|
||
| // Return to `master` and make a new `experimental` branch | ||
| runSequence([ | ||
| ["git", ["checkout", "master"]], | ||
| ["git", ["branch", "-D", "experimental"]], | ||
| ["git", ["checkout", "-b", "experimental"]], | ||
| ]); | ||
|
|
||
| // Merge each branch into `experimental` (which, if there is a conflict, we now know is from inter-experiment conflict) | ||
| for (const branch of branches) { | ||
| // Find the merge base | ||
| const mergeBase = runSequence([ | ||
| ["git", ["merge-base", branch, "experimental"]], | ||
| ]); | ||
| // Simulate the merge and abort if there are conflicts | ||
| const mergeTree = runSequence([ | ||
| ["git", ["merge-tree", mergeBase, branch, "experimental"]] | ||
| ]); | ||
| if (mergeTree.indexOf(`===${"="}===`)) { // 7 equals is the center of the merge conflict marker | ||
| throw new Error(`Merge conflict detected on branch ${branch} with other experiment`); | ||
| } | ||
| // Merge (always producing a merge commit) | ||
| runSequence([ | ||
| ["git", ["merge", branch, "--no-ff"]], | ||
| ]); | ||
| } | ||
| // Every branch merged OK, force push the replacement `experimental` branch | ||
| runSequence([ | ||
| ["git", ["push", "-f", "-u", "origin", "experimental"]], | ||
| ]); | ||
| } | ||
|
|
||
| main().catch(e => (console.error(e), process.exitCode = 2)); |
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