Improve error message when .dart_tool/package_config.json is missing (#2252)
diff --git a/lib/src/entrypoint.dart b/lib/src/entrypoint.dart
index ebe75f5..1b407fc 100644
--- a/lib/src/entrypoint.dart
+++ b/lib/src/entrypoint.dart
@@ -398,16 +398,17 @@
if (!entryExists(lockFilePath)) {
dataError('No pubspec.lock file found, please run "pub get" first.');
}
-
- if (!entryExists(packagesFile)) {
- dataError('No .packages file found, please run "pub get" first.');
- }
-
if (!entryExists(packageConfigFile)) {
dataError(
- 'No .dart_tool/package_config.json file found, please run "pub get" first.',
+ 'No .dart_tool/package_config.json file found, please run "pub get" '
+ 'first.\n\n'
+ 'Starting with Dart 2.7 this file configures the resolution of '
+ 'package import URIs. Running "pub get" will generate this file.',
);
}
+ if (!entryExists(packagesFile)) {
+ dataError('No .packages file found, please run "pub get" first.');
+ }
// Manually parse the lockfile because a full YAML parse is relatively slow
// and this is on the hot path for "pub run".
