Merge pull request #1290 from spotify/shmidt-i/yarn-tsc-error-message

More explicit error message when missing .d.ts files

packages/cli/package.json

@@ -67,7 +67,7 @@
     "replace-in-file": "^6.0.0",
     "rollup": "2.10.x",
     "rollup-plugin-dts": "^1.4.6",
-    "rollup-plugin-esbuild": "^1.4.1",
+    "rollup-plugin-esbuild": "^2.0.0",
     "rollup-plugin-image-files": "^1.4.2",
     "rollup-plugin-peer-deps-external": "^2.2.2",
     "rollup-plugin-postcss": "^3.1.1",

packages/cli/src/lib/packager/config.ts

@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+import chalk from 'chalk';
 import fs from 'fs-extra';
 import { relative as relativePath } from 'path';
 import peerDepsExternal from 'rollup-plugin-peer-deps-external';
@@ -42,7 +43,9 @@ export const makeConfigs = async (
   if (!declarationsExist) {
     const path = relativePath(paths.targetDir, typesInput);
     throw new Error(
-      `No declaration files found at ${path}, be sure to run tsc to generate .d.ts files before packaging`,
+      `No declaration files found at ${path}, be sure to run ${chalk.bgRed.white(
+        'yarn tsc',
+      )} to generate .d.ts files before packaging`,
     );
   }