clone repo

Author: pngwn

package.json

@@ -21,6 +21,7 @@
 	"homepage": "https://github.com/sveltejs/action-deploy-docs#readme",
 	"devDependencies": {
 		"@actions/core": "^1.2.6",
+		"@actions/exec": "^1.0.4",
 		"@rollup/plugin-commonjs": "^17.1.0",
 		"@rollup/plugin-node-resolve": "^11.2.0",
 		"@sindresorhus/slugify": "^1.1.0",

pnpm-lock.yaml

@@ -1,15 +1,69 @@
 import core from "@actions/core";
+import exec from "@actions/exec";
+import fs from "fs";
+import path from "path";
+
+async function get_repo(
+	target_repo: string,
+	target_branch: string,
+	docs_path: string,
+	pkg_path: string
+): Promise<void> {
+	const tmp_dir_name = `__tmp_repo_path`;
+
+	// we want to clone the necessary branch and only that branch
+	// but we don't want files because we want to sparsely checkout the branch later
+	// we also don't want any history, we only care about files
+	// this is basically magic
+	await exec.exec("git", [
+		"clone",
+		`https://github.com/sveltejs/${target_repo}.git`,
+		"--no-checkout",
+		"--branch",
+		target_branch,
+		"--single-branch",
+		tmp_dir_name,
+		"--depth",
+		"1",
+		"--verbose",
+	]);
+
+	process.chdir(tmp_dir_name);
+
+	await exec.exec("git", ["sparse-checkout", "init"]);
+
+	// we only care about the documentation folder and any package readmes + package.jsons
+	fs.writeFileSync(
+		path.join(process.cwd(), ".git/info/sparse-checkout"),
+		`/${docs_path}/\n/${pkg_path}/*/README.md\n/packages/*/package.json"`
+	);
+
+	await exec.exec("git", ["sparse-checkout", "reapply"]);
+	await exec.exec("git", ["switch", target_branch]);
+}
 
 async function run() {
 	const target_repo = core.getInput("repo");
 	const target_branch = core.getInput("branch");
 	const cf_token = core.getInput("token");
 
+	const docs_path = "documentation";
+	const pkg_path = "packages";
+
 	if (target_branch !== "main" && target_branch !== "master") {
 		core.setFailed("Branch deploys are not yet supported.");
 	}
 
 	// get repo
+
+	try {
+		await get_repo(target_repo, target_branch, docs_path, pkg_path);
+	} catch (e) {
+		core.setFailed(
+			`Failed to clone repository: https://github.com/sveltejs/${target_repo}.git#${target_branch}`
+		);
+	}
+
 	// read docs in
 	// format them
 	// transform to cf format (batch keys)