hacky

.gitignore

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+node_modules/

.npmrc

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+@nulo:registry=https://gitea.nulo.in/api/packages/nulo/npm/

index.js

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+import { execFile as _execFile } from "node:child_process";
+import { readFile, stat, symlink, writeFile } from "node:fs/promises";
+import { join } from "node:path";
+import { promisify } from "node:util";
+const execFile = promisify(_execFile);
+
+/**
+ * @typedef {object} Alpine
+ * @prop {(packages: string[]) => Promise<void>} install
+ * @prop {(runlevel: string, service: string) => Promise<void>} rcUpdate
+ */
+
+/**
+ * Initialize an Alpine 3.18 rootfs at `root`
+ * @param {string} root
+ * @returns {Promise<Alpine>}
+ */
+export async function init(root) {
+  await runInContainer(
+    root,
+    `
+mkdir -p /rootfs/etc/apk
+cp -r /etc/apk/keys /rootfs/etc/apk/
+echo https://dl-cdn.alpinelinux.org/alpine/v3.18/main >> /rootfs/etc/apk/repositories
+echo https://dl-cdn.alpinelinux.org/alpine/v3.18/community >> /rootfs/etc/apk/repositories
+apk add --initdb --root /rootfs alpine-base
+    `
+  );
+  return {
+    async install(packages) {
+      const worldPath = join(root, "/etc/apk/world");
+      const oldWorld = (await readFile(worldPath, "utf-8")).split("\n");
+      const newWorld = oldWorld.concat(packages);
+      await writeFile(worldPath, newWorld.join("\n"));
+
+      await runInContainer(root, `apk fix --root /rootfs`);
+    },
+    async rcUpdate(runlevel, service) {
+      const servicePath = `/etc/init.d/${service}`;
+      try {
+        await stat(servicePath);
+      } catch (error) {
+        throw new Error(`Can't stat service ${service}: ${error}`);
+      }
+      await symlink(servicePath, join(root, `/etc/runlevels/`, runlevel));
+    },
+  };
+}
+
+/**
+ * Run script inside an Alpine 3.18 container with `root` mounted in /rootfs
+ * @param {string} root
+ * @param {string} script
+ */
+async function runInContainer(root, script) {
+  await execFile("podman", [
+    "run",
+    "-it",
+    "--rm",
+    "-v",
+    `${root}:/rootfs:Z`,
+    "docker.io/alpine:3.18",
+    "sh",
+    "-ec",
+    script,
+  ]);
+}

package.json

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+{
+  "name": "@nulo/apkit",
+  "type": "module",
+  "version": "0.0.1",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "@tsconfig/node16": "^1.0.4",
+    "@types/node": "^20.2.5"
+  }
+}

pnpm-lock.yaml

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+lockfileVersion: '6.0'
+
+devDependencies:
+  '@tsconfig/node16':
+    specifier: ^1.0.4
+    version: 1.0.4
+  '@types/node':
+    specifier: ^20.2.5
+    version: 20.2.5
+
+packages:
+
+  /@tsconfig/node16@1.0.4:
+    resolution: {integrity: sha512-vxhUy4J8lyeyinH7Azl1pdd43GJhZH/tP2weN8TntQblOY+A0XbT8DJk1/oCPuOOyg/Ja757rG0CgHcWC8OfMA==}
+    dev: true
+
+  /@types/node@20.2.5:
+    resolution: {integrity: sha512-JJulVEQXmiY9Px5axXHeYGLSjhkZEnD+MDPDGbCbIAbMslkKwmygtZFy1X6s/075Yo94sf8GuSlFfPzysQrWZQ==}
+    dev: true

tsconfig.json

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+{
+  "extends": "@tsconfig/node16/tsconfig.json",
+  "exclude": ["build.js/", "build/"],
+  "compilerOptions": {
+    "allowJs": true,
+    "checkJs": true
+  }
+}