Merge pull request #6 from vercel-labs/cache

feat: add cache

package.json

@@ -26,6 +26,7 @@
   ],
   "dependencies": {
     "arg": "~5.0.2",
+    "find-cache-dir": "~5.0.0",
     "mri": "~1.2.0",
     "open": "~10.1.0",
     "picocolors": "~1.1.1",

src/cache.ts

@@ -0,0 +1,29 @@
+import { mkdir, writeFile, readFile } from 'fs/promises'
+import findCacheDirectory from 'find-cache-dir'
+import { existsSync } from 'fs'
+import path from 'path'
+
+export const createCache = () => {
+  const cacheDir = findCacheDirectory({ name: 'vercel-open' })
+  const cachePath = path.resolve(cacheDir!, 'cache.json')
+
+  const cacheFilePromise = (async () => {
+    try {
+      return JSON.parse(await readFile(cachePath, 'utf-8'))
+    } catch (error) {
+      return {}
+    }
+  })()
+
+  return {
+    read: () => cacheFilePromise,
+    write: async (data: any) => {
+      const cache = await cacheFilePromise
+      const newData = { ...cache, ...data }
+      if (!existsSync(cacheDir!)) {
+        await mkdir(cacheDir!, { recursive: true })
+      }
+      await writeFile(cachePath, JSON.stringify(newData, null, 2), 'utf-8')
+    }
+  }
+}

src/index.ts

@@ -2,6 +2,10 @@ import { readFile } from 'fs/promises'
 import { existsSync } from 'fs'
 import path from 'path'
 
+import { createCache } from './cache.js'
+
+const cache = createCache()
+
 const vercelApi = (pathname: string) =>
   fetch(`${process.env.VERCEL_API}/${pathname}`, {
     headers: {
@@ -51,9 +55,15 @@ async function readProjectFile (): Promise<{
 }
 
 async function fromPath (): Promise<{ org: string; project: string }> {
+  const cached = await cache.read()
+  if (cached.org && cached.project) return cached
+
   const { projectId, teamId } = await readProjectFile()
   const org = await getOrganizationName(teamId)
   const project = await getProjectName(projectId, teamId)
+
+  await cache.write({ org, project })
+
   return { org, project }
 }