feat(create-fabrice-ai): downloading latest release (#116)

Before, we downloaded the `main` snapshot. It was fine. However, it
didn't work well when the current `main` source code was incompatible
with the released `npm` modules. This situation happened with the recent
#105. Now, we're getting the latest official release and taking the
examples out of it.

Because the tarball starts with a directory of an unknown name (in fact,
it's the `org-repo-lastcommitid` kind of) - we're about to extract the
full release and not only the example folder (as it was before) because
the leading directory name is unknown.

---------

Co-authored-by: Mike Grabowski <[email protected]>

Author: pkarw

packages/create-fabrice-ai/src/index.ts

@@ -13,6 +13,7 @@ import {
   downloadAndExtractTemplate,
   formatTargetDir,
   isNodeError,
+  latestReleaseDownloadLink,
 } from './utils.js'
 
 console.log(
@@ -133,13 +134,11 @@ if (typeof template !== 'object') {
 
 const s = spinner()
 
-s.start('Downloading template...')
+const releaseTarballUrl = await latestReleaseDownloadLink('callstackincubator', 'fabrice-ai')
 
-await downloadAndExtractTemplate(
-  root,
-  'https://github.com/callstackincubator/fabrice-ai/archive/refs/heads/main.tar.gz',
-  template.files
-)
+s.start(`Downloading template...`)
+
+await downloadAndExtractTemplate(root, releaseTarballUrl, template.files)
 
 copyAdditionalTemplateFiles(root)
 

packages/create-fabrice-ai/src/utils.ts

@@ -9,6 +9,26 @@ export function formatTargetDir(targetDir: string) {
   return targetDir.trim().replace(/\/+$/g, '')
 }
 
+export async function latestReleaseDownloadLink(
+  organization: string,
+  repo: string
+): Promise<string> {
+  const response = await fetch(
+    `https://api.github.com/repos/${organization}/${repo}/releases/latest`
+  )
+
+  if (!response.ok) {
+    throw new Error(`Failed to fetch release info from ${response.url}.`)
+  }
+
+  const body = await response.json()
+  if (!('tarball_url' in body) || typeof body.tarball_url !== 'string') {
+    throw new Error(`Failed to get tarball url from ${response.url}.`)
+  }
+
+  return body.tarball_url
+}
+
 export async function downloadAndExtractTemplate(root: string, tarball: string, files: string[]) {
   const response = await fetch(tarball)
   if (!response.ok || !response.body) {
@@ -18,13 +38,10 @@ export async function downloadAndExtractTemplate(root: string, tarball: string,
   await Stream.pipeline([
     // @ts-ignore
     Readable.fromWeb(response.body),
-    extract(
-      {
-        cwd: tmpdir(),
-        strip: 1,
-      },
-      ['fabrice-ai-main/example']
-    ),
+    extract({
+      cwd: path.join(import.meta.dirname),
+      strip: 1,
+    }),
   ])
 
   const filesToCopy = [...files, 'package.json']