refactor: improve file creation logic for coverage output paths

Author: Dhruv-Maradiya

pkgs/coverage/.gitignore

@@ -16,3 +16,4 @@ build
 *~
 coverage/
 var/
+test/test_coverage_options/coverage_data

pkgs/coverage/bin/collect_coverage.dart

@@ -143,7 +143,13 @@ Options parseArgs(List<String> arguments, CoverageOptions defaultOptions) {
   } else {
     final outFilePath = p.normalize(outPath ??
         p.absolute(defaultOptions.outputDirectory!, 'coverage.json'));
-    final outFile = File(outFilePath)..createSync(recursive: true);
+
+    final outFile = File(outFilePath);
+    if (!FileSystemEntity.isDirectorySync(outFilePath) &&
+        !FileSystemEntity.isFileSync(outFilePath)) {
+      outFile.createSync(recursive: true);
+    }
+
     out = outFile.path;
   }
 

pkgs/coverage/bin/format_coverage.dart

@@ -260,7 +260,12 @@ Environment parseArgs(List<String> arguments, CoverageOptions defaultOptions) {
   } else {
     final outFilePath = p.normalize(
         outPath ?? p.absolute(defaultOptions.outputDirectory!, 'lcov.info'));
-    final outfile = File(outFilePath)..createSync(recursive: true);
+
+    final outfile = File(outFilePath);
+    if (!FileSystemEntity.isDirectorySync(outFilePath) &&
+        !FileSystemEntity.isFileSync(outFilePath)) {
+      outfile.createSync(recursive: true);
+    }
     output = outfile.path;
   }