index.js to manage CLI

README.md

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+# build-action
+
+This is a Github CI action which wraps Viam's cloud build system. Use this to build and publish your Viam module for multiple platforms.
+
+## What is Viam cloud build?
+
+Cloud build is cross-compilation infrastructure that we provide to module authors so you can publish your module for multiple platforms. (x86 and ARM Linux, ideally MacOS as well).
+
+Your customers are deploying to different kinds of hardware, and prototyping on a laptop. Cloud build helps you to reach them everywhere without doing the heavy lifting of operating your own buildsystem.
+
+## Basic usage
+
+## Auth instructions

src/.gitignore

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+viam-cli

src/index.js

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+const fs = require('fs');
+const os = require('os');
+const https = require('https');
+const stream = require('node:stream/promises');
+const util = require('node:util');
+const execFileAsync = util.promisify(require('node:child_process').execFile);
+
+const platforms = ['linux', 'darwin'];
+const machines = {
+    // todo: why are arm64 and aarch64 both in their docs https://nodejs.org/api/os.html#osmachine
+    arm64: 'arm64',
+    aarch64: 'arm64',
+    x86_64: 'amd64',
+};
+const cliPath = './viam-cli';
+const argsConfig = {
+    options: {
+        "skip-download": { type: 'boolean' },
+    },
+};
+
+/** download a file and optionally set mode bits */
+async function download(url, dest, mode = fs.constants.S_IRWXU) {
+    const output = fs.createWriteStream(dest);
+    const incoming = await new Promise(function(resolve, _reject) {
+        https.get(url, (incoming) => resolve(incoming));
+    })
+    await stream.pipeline(incoming, output);
+    if (mode != null) {
+        fs.chmodSync(dest, mode);
+    }
+}
+
+/** infer the architecture portion of the URL from os.* methods. */
+function archSlug() {
+    const platform = os.platform(), machine = os.machine();
+    if (platforms.indexOf(platform) == -1) {
+        throw Error(`unknown platform ${platform}`);
+    }
+    if (machines[machine] == null) {
+        throw Error(`unknown machine ${machine}`);
+    }
+    return `${platform}-${machines[machine]}`;
+}
+
+/** async main */
+(async function() {
+    const args = util.parseArgs(argsConfig);
+    const slug = archSlug();
+    console.log('inferred architecture', slug);
+    if (!args.values['skip-download']) {
+        await download(`https://storage.googleapis.com/packages.viam.com/apps/viam-cli/viam-cli-stable-${slug}`, cliPath);
+        console.log('downloaded CLI');
+    }
+    console.log((await execFileAsync(cliPath, ['version'])).stdout.trim());
+    console.warn("TODO: start build");
+    console.warn("TODO: wait for build");
+    console.warn("TODO: show logs / status");
+})();