fix: add support for pulling registry from yarnrc file

src/index.ts

@@ -1,10 +1,14 @@
 import { PluginConfig } from './config/plugin';
 import { error, ErrorTypes } from './utils/error';
-import { getChannel, getNpmAuthIdent, getNpmToken, getPackage } from './utils';
+import {
+  getChannel,
+  getNpmAuthIdent,
+  getNpmToken,
+  getPackage,
+  getYarnRc,
+} from './utils';
 import { Context, PrepareContext } from './types';
 import { Yarn } from './utils/yarn';
-import yaml from 'js-yaml';
-import * as fs from 'fs';
 
 let verified = false;
 let prepared = false;
@@ -20,10 +24,7 @@ export async function verifyConditions(
   const packageJson = await getPackage(ctx.cwd);
 
   ctx.logger.log(`read ${ctx.cwd}/yarnrc.yml`);
-
-  const yarnrc = yaml.load(
-    fs.readFileSync(`${ctx.cwd}/.yarnrc.yml`, 'utf8'),
-  ) as Record<string, string>;
+  const yarnrc = await getYarnRc(ctx.cwd);
 
   const registryFromPackage = packageJson?.publishConfig?.registry as string;
   const registryFromYarnrc = yarnrc?.npmPublishRegistry;

src/utils/index.ts

@@ -1,6 +1,8 @@
 import { error, ErrorTypes } from './error';
 import semver from 'semver';
 import readPackage, { NormalizedPackageJson } from 'read-pkg';
+import yaml from 'js-yaml';
+import fs from 'fs';
 
 export async function getPackage(cwd: string) {
   let packageJson: NormalizedPackageJson;
@@ -17,6 +19,22 @@ export async function getPackage(cwd: string) {
   return packageJson;
 }
 
+export async function getYarnRc(cwd: string) {
+  let yarnRc: Record<string, string>;
+
+  try {
+    yarnRc = (await yaml.load(
+      fs.readFileSync(`${cwd}/.yarnrc.yml`, 'utf8'),
+    )) as Record<string, string>;
+  } catch (err) {
+    const { code } = err as { code?: string };
+    if (code === 'ENOENT') throw error(ErrorTypes.MISSING_PACKAGE);
+    throw new AggregateError([err]);
+  }
+
+  return yarnRc;
+}
+
 export function getNpmToken(env: NodeJS.ProcessEnv): string {
   const token = env['NPM_TOKEN'];
   if (typeof token !== 'string') throw error(ErrorTypes.INVALID_NPM_TOKEN);

src/utils/utils.test.ts

@@ -19,5 +19,16 @@ describe('utils', () => {
 
       expect(result.name).toEqual(mockPackage.name);
     });
+
+    it('should throw an error if the package.json does not exist', async () => {
+      const cwd = tempy.directory();
+      await expect(getPackage(cwd)).rejects.toThrow();
+    });
+
+    it('should throw an error if the package.json does not include a name', async () => {
+      const cwd = tempy.directory();
+      fs.writeFileSync(`${cwd}/package.json`, JSON.stringify({}));
+      await expect(getPackage(cwd)).rejects.toThrow();
+    });
   });
 });