Show invalid config filename in error message (#6865)

CHANGELOG.unreleased.md

@@ -1406,6 +1406,20 @@ async function f() {
 }
 ```
 
+#### CLI: Display invalid config filename in error message ([#6865] by [@fisker])
+
+<!-- prettier-ignore -->
+```bash
+# Input
+$ prettier filename.js --config .invalid-config
+
+# Output (Prettier stable)
+Invalid configuration file: ...
+
+# Output (Prettier master)
+Invalid configuration file `.invalid-config`: ...
+```
+
 [#5682]: https://github.com/prettier/prettier/pull/5682
 [#6657]: https://github.com/prettier/prettier/pull/6657
 [#5910]: https://github.com/prettier/prettier/pull/5910
@@ -1456,6 +1470,7 @@ async function f() {
 [#6796]: https://github.com/prettier/prettier/pull/6796
 [#6848]: https://github.com/prettier/prettier/pull/6848
 [#6856]: https://github.com/prettier/prettier/pull/6856
+[#6865]: https://github.com/prettier/prettier/pull/6865
 [#6863]: https://github.com/prettier/prettier/pull/6863
 [@brainkim]: https://github.com/brainkim
 [@duailibe]: https://github.com/duailibe
@@ -1478,4 +1493,5 @@ async function f() {
 [@andersk]: https://github.com/andersk
 [@lydell]: https://github.com/lydell
 [@aymericbouzy]: https://github.com/aymericbouzy
+[@fisker]: https://github.com/fisker
 [@jridgewell]: https://github.com/jridgewell

src/cli/util.js

@@ -284,7 +284,9 @@ function getOptionsOrDie(context, filePath) {
     context.logger.debug("loaded options `" + JSON.stringify(options) + "`");
     return options;
   } catch (error) {
-    context.logger.error("Invalid configuration file: " + error.message);
+    context.logger.error(
+      `Invalid configuration file \`${filePath}\`: ` + error.message
+    );
     process.exit(2);
   }
 }

tests_integration/__tests__/__snapshots__/config-invalid.js.snap

@@ -19,7 +19,7 @@ exports[`show warning with unknown option (stdout) 1`] = `""`;
 exports[`show warning with unknown option (write) 1`] = `Array []`;
 
 exports[`throw error for unsupported extension (stderr) 1`] = `
-"[error] Invalid configuration file: No sync loader specified for extension \\".unsupported\\"
+"[error] Invalid configuration file \`<cwd>/tests_integration/cli/config/invalid\`: No sync loader specified for extension \\".unsupported\\"
 "
 `;
 
@@ -28,7 +28,7 @@ exports[`throw error for unsupported extension (stdout) 1`] = `""`;
 exports[`throw error for unsupported extension (write) 1`] = `Array []`;
 
 exports[`throw error with invalid config format (stderr) 1`] = `
-"[error] Invalid configuration file: Cannot find module '--invalid--' from '<cwd>/tests_integration/cli/config/invalid/file'
+"[error] Invalid configuration file \`<cwd>/tests_integration/cli/config/invalid\`: Cannot find module '--invalid--' from '<cwd>/tests_integration/cli/config/invalid/file'
 "
 `;
 
@@ -64,7 +64,7 @@ exports[`throw error with invalid config precedence option (configPrecedence) (s
 exports[`throw error with invalid config precedence option (configPrecedence) (write) 1`] = `Array []`;
 
 exports[`throw error with invalid config target (directory) (stderr) 1`] = `
-"[error] Invalid configuration file: EISDIR: illegal operation on a directory, read
+"[error] Invalid configuration file \`<cwd>/tests_integration/cli/config/invalid\`: EISDIR: illegal operation on a directory, read
 "
 `;
 

tests_integration/path-serializer.js

@@ -1,9 +1,18 @@
 "use strict";
 
+const replaceCWD = text => {
+  const cwd = process.cwd();
+  while (text.indexOf(cwd) !== -1) {
+    text = text.replace(cwd, "<cwd>");
+  }
+
+  return text;
+};
+
 module.exports = {
   test: value =>
     typeof value === "string" &&
     (value.indexOf("\\") > -1 || value.indexOf(process.cwd()) > -1),
   print: (value, serializer) =>
-    serializer(value.replace(process.cwd(), "<cwd>").replace(/\\/g, "/"))
+    serializer(replaceCWD(value).replace(/\\/g, "/"))
 };