Files
auto-rebase/app.ts
2024-11-27 19:38:53 +01:00

139 lines
4.6 KiB
TypeScript

import * as core from "@actions/core";
import { spawn } from "child_process";
import fs from "fs/promises";
import path from "path";
import {ChildProcess, SpawnOptions} from "node:child_process";
const myToken = core.getInput("branches");
// Ignored branches
const IGNORED_BRANCHES = ["master", "main", "dev", "release"];
type BranchDependencies = Record<string, null | string>;
/**
* Helper function to run a Git command and capture stdout and stderr.
*/
const runGitCommand = (args: string[], options?: SpawnOptions): Promise<string> =>
new Promise((resolve, reject) => {
const git: ChildProcess = spawn("git", args, { stdio: "pipe", ...options });
let stdout: string = "";
let stderr: string = "";
git.stdout.on("data", (data) => stdout += data.toString());
git.stderr.on("data", (data) => stderr += data.toString());
// Handle completion
git.on("close", (code) => (code === 0) ?
resolve(stdout) :
reject(new Error(`Git command failed with code ${code}: ${stderr}`)));
});
/**
* Fetch all remote branches.
*/
const fetchBranches = async (): Promise<string[]> => {
console.log("Fetching all branches...");
await runGitCommand(["fetch", "--all"]);
const branches: string = await runGitCommand(["branch", "-r"]);
console.log(branches)
return branches
.split("\n")
.map((branch) => branch.trim().replace("origin/", ""))
.filter((branch) => !IGNORED_BRANCHES.includes(branch) && branch !== "");
}
/**
* Detect dependencies between branches.
*/
const detectDependencies = async (branches: string[]): Promise<BranchDependencies> => {
console.log("Detecting dependencies...");
const dependencies: BranchDependencies = {};
for (const branch of branches) {
dependencies[branch] = null; // Default: no dependency
for (const otherBranch of branches) {
if (branch !== otherBranch) {
const base = await runGitCommand(["merge-base", `origin/${branch}`, `origin/${otherBranch}`]);
const isAncestor = await runGitCommand(["merge-base", "--is-ancestor", base.trim(), `origin/${branch}`]).catch(() => false);
if (isAncestor) {
dependencies[branch] = otherBranch;
break;
}
}
}
}
return dependencies;
}
/**
* Perform a topological sort to determine the rebase order.
*/
const determineRebaseOrder = (dependencies: BranchDependencies) => {
console.log("Determining rebase order...");
const visited = new Set();
const order = [];
const visit = (branch) => {
if (visited.has(branch)) return;
visited.add(branch);
if (dependencies[branch]) visit(dependencies[branch]);
order.push(branch);
};
Object.keys(dependencies).forEach((branch) => visit(branch));
return order;
}
/**
* Rebase a branch onto its base branch.
*/
const rebaseBranch = async (branch: string, baseBranch = "master"): Promise<void> => {
console.log(`Rebasing ${branch} onto ${baseBranch}...`);
try {
await runGitCommand(["checkout", branch]);
await runGitCommand(["fetch", "origin", baseBranch]);
await runGitCommand(["rebase", `origin/${baseBranch}`]);
console.log(`Rebase successful for ${branch}. Pushing...`);
await runGitCommand(["push", "--force-with-lease"]);
} catch (error) {
console.error(`Rebase failed for ${branch}: ${error.message}`);
await runGitCommand(["rebase", "--abort"]);
}
}
/**
* Main function to execute the workflow.
*/
const main = async (): Promise<void> => {
try {
// Step 1: Fetch branches
const branches: string[] = await fetchBranches();
console.log(branches)
await fs.writeFile(BRANCHES_FILE, branches.join("\n"), "utf-8");
console.log("Branches:", branches);
// Step 2: Detect dependencies
const dependencies = await detectDependencies(branches);
await fs.writeFile(DEPENDENCIES_FILE, JSON.stringify(dependencies, null, 2), "utf-8");
console.log("Dependencies:", dependencies);
// Step 3: Determine rebase order
const order = determineRebaseOrder(dependencies);
console.log("Rebase order:", order);
// Step 4: Rebase branches
for (const branch of order) {
const baseBranch = dependencies[branch] || "master";
await rebaseBranch(branch, baseBranch);
}
} catch (error) {
console.error("Error during workflow execution:", error.message);
}
}
// Execute the script
main();