Embrace native file error messages for cml-publish

bin/cml-publish.test.js

@@ -108,10 +108,8 @@ describe('CML e2e', () => {
 
   test('cml-publish /nonexistent produces file error', async () => {
     await expect(
-      exec(`echo none | node ./bin/cml-publish.js /nonexistent`)
-    ).rejects.toThrowError(
-      'Path /nonexistent does not exist or is not a readable file'
-    );
+      exec('echo none | node ./bin/cml-publish.js /nonexistent')
+    ).rejects.toThrowError('ENOENT: no such file or directory, stat');
   });
 
   test('echo invalid | cml-publish produces buffer mime type error', async () => {

src/utils.js

@@ -55,17 +55,9 @@ const mime_type = async (opts) => {
 const fetch_upload_data = async (opts) => {
   const { path, buffer } = opts;
 
-  if (path) {
-    try {
-      await fs.promises.access(path, fs.constants.F_OK | fs.constants.R_OK);
-    } catch (err) {
-      throw new Error(`Path ${path} does not exist or is not a readable file`);
-    }
-  }
-
-  const mime = await mime_type(opts);
-  const data = path ? fs.createReadStream(path) : buffer;
   const size = path ? (await fs.promises.stat(path)).size : buffer.length;
+  const data = path ? fs.createReadStream(path) : buffer;
+  const mime = await mime_type(opts);
 
   return { mime, size, data };
 };