fix: metadataConverter writes zip to dir and works outside of project

src/convert/metadataConverter.ts

@@ -67,9 +67,15 @@ export class MetadataConverter {
       await Promise.all([conversionPipeline, ...tasks]);
 
       const result: ConvertResult = { packagePath };
-      if (output.type === 'zip' && !packagePath) {
-        result.zipBuffer = (writer as ZipWriter).buffer;
-      } else if (output.type !== 'zip') {
+
+      if (output.type === 'zip') {
+        const buffer = (writer as ZipWriter).buffer;
+        if (!packagePath) {
+          result.zipBuffer = buffer;
+        } else if (buffer) {
+          await promises.writeFile(packagePath, buffer);
+        }
+      } else {
         result.converted = (writer as StandardWriter).converted;
       }
       return result;

src/convert/replacements.ts

@@ -7,7 +7,7 @@
 import { readFile } from 'node:fs/promises';
 import { Transform, Readable } from 'node:stream';
 import { sep, posix } from 'node:path';
-import { Lifecycle, Messages, SfProject } from '@salesforce/core';
+import { Lifecycle, Messages, SfError, SfProject } from '@salesforce/core';
 import * as minimatch from 'minimatch';
 import { Env } from '@salesforce/kit';
 import { ensureString, isString } from '@salesforce/ts-types';
@@ -222,9 +222,18 @@ const getEnvValue = (env: string, allowUnset = false): string =>
  * Read the `replacement` property from sfdx-project.json
  */
 const readReplacementsFromProject = async (projectDir?: string): Promise<ReplacementConfig[]> => {
-  const proj = await SfProject.resolve(projectDir);
-  const projJson = (await proj.resolveProjectConfig()) as { replacements?: ReplacementConfig[] };
-  return projJson.replacements ?? [];
+  try {
+    const proj = await SfProject.resolve(projectDir);
+    const projJson = (await proj.resolveProjectConfig()) as { replacements?: ReplacementConfig[] };
+
+    return projJson.replacements ?? [];
+  } catch (e) {
+    if (e instanceof SfError && e.name === 'InvalidProjectWorkspaceError') {
+      return [];
+    }
+
+    throw e;
+  }
 };
 
 /** escape any special characters used in the string so it can be used as a regex */

test/convert/metadataConverter.test.ts

@@ -290,14 +290,29 @@ describe('MetadataConverter', () => {
 
     it('should convert to specified output dir', async () => {
       const zipPath = outputDirectory + '.zip';
+      const testBuffer = Buffer.from('🥔');
+      $$.SANDBOX.stub(streams.ZipWriter.prototype, 'buffer').value(testBuffer);
       await converter.convert(components, 'metadata', {
         type: 'zip',
         outputDirectory,
         genUniqueDir: false,
       });
 
       expect(ensureDirectoryStub.calledBefore(pipelineStub)).to.be.true;
-      expect(ensureDirectoryStub.firstCall.args[0]).to.equal(dirname(zipPath));
+      expect(writeFileStub.firstCall.args[0]).to.equal(zipPath);
+      expect(writeFileStub.firstCall.args[1]).to.deep.equal(testBuffer);
+    });
+
+    it('should not return zipBuffer result when outputDirectory is specified', async () => {
+      const testBuffer = Buffer.from('🥔');
+      $$.SANDBOX.stub(streams.ZipWriter.prototype, 'buffer').value(testBuffer);
+      const result = await converter.convert(components, 'metadata', {
+        type: 'zip',
+        outputDirectory,
+        genUniqueDir: false,
+      });
+
+      expect(result.zipBuffer).to.be.undefined;
     });
 
     it('should return zipBuffer result for in-memory configuration', async () => {