Improve v1 API warning

Previously the warning did not provide much context: now include the
config in the warning so there's something useful for the user to search
in node_modules.

Co-authored-by: Robert Jackson <[email protected]>

Author: hjdivad

src/utils/normalize-options.js

@@ -95,10 +95,13 @@ function parseFlags(options) {
   }
 
   if (legacyFeatures || legacyEnvFlags) {
+    let msg = `[babel-plugin-debug-macros]: passed v1 configuration, converting to v2.  Legacy configuration passed:\n${JSON.stringify(
+      options,
+      null,
+      2
+    )}`;
     // eslint-disable-next-line no-console
-    console.warn(
-      'babel-plugin-debug-macros configuration API has changed, please update your configuration'
-    );
+    console.warn(msg);
   }
 
   return combinedFlags;

tests/normalize-options-test.js

@@ -30,7 +30,7 @@ describe('normalizeOptions', function() {
     let warnings = [];
     console.warn = warning => warnings.push(warning); // eslint-disable-line
 
-    let actual = normalizeOptions({
+    let options = {
       envFlags: {
         source: '@ember/env-flags',
         flags: {
@@ -48,8 +48,9 @@ describe('normalizeOptions', function() {
           FEATURE_B: null,
         },
       },
-    });
-
+    };
+    let stringifiedOptions = JSON.stringify(options, null, 2);
+    let actual = normalizeOptions(options);
     let expected = {
       debugTools: {
         isDebug: false,
@@ -70,7 +71,7 @@ describe('normalizeOptions', function() {
 
     expect(actual).toEqual(expected);
     expect(warnings).toEqual([
-      'babel-plugin-debug-macros configuration API has changed, please update your configuration',
+      `[babel-plugin-debug-macros]: passed v1 configuration, converting to v2.  Legacy configuration passed:\n${stringifiedOptions}`,
     ]);
   });