Use env variable for workflow output (#85)

* Add setOutput method

* Use setOutput method for save value

* removed unused import

workflows_utils/add_to_output.dart

@@ -0,0 +1,14 @@
+import 'dart:io';
+
+Future<void> setOutput(String item) async {
+  Map<String, String> envVars = Platform.environment;
+  String? envPath = envVars["GITHUB_OUTPUT"];
+  File ghEnv = File(envPath!);
+  String currentContent = await ghEnv.readAsString();
+  if (currentContent.isNotEmpty) {
+    currentContent += "\n" "$item";
+  } else {
+    currentContent = item;
+  }
+  ghEnv.writeAsString(currentContent);
+}

workflows_utils/get_project_version.dart

@@ -1,11 +1,12 @@
 import 'dart:io';
 
+import 'add_to_output.dart';
+
 main() async {
   final data = File('./pubspec.yaml');
   String text = data.readAsStringSync();
   String currentVersion = text.substring(text.indexOf("version: ") + 9,
       text.indexOf("\n", text.indexOf("version: ")));
-  await Process.run(
-      'echo "project_version=v${currentVersion.trim()}" >> \$GITHUB_OUTPUT', [],
-      runInShell: true);
+  String versionEnvVar = "project_version=v${currentVersion.trim()}";
+  await setOutput(versionEnvVar);
 }

workflows_utils/labels_to_track.dart

@@ -1,13 +1,12 @@
-import 'dart:io';
+import 'add_to_output.dart';
 
 const List<String> options = ["alpha", "beta", "internal"];
 Future<void> main(List<String> labels) async {
   List<String> trackLabels = List.from(labels);
   trackLabels.removeWhere((e) => !options.contains(e));
-  String track = "alpha";
+  String track = "track=alpha";
   if (trackLabels.isNotEmpty) {
-    track = trackLabels.first;
+    track = "track=${trackLabels.first}";
   }
-  await Process.run('echo "track=$track" >> \$GITHUB_OUTPUT', [],
-      runInShell: true);
+  await setOutput(track);
 }

workflows_utils/labels_to_version_parts.dart

@@ -1,4 +1,4 @@
-import 'dart:io';
+import 'add_to_output.dart';
 
 const List<String> options = ["major", "minor", "patch"];
 Future<void> main(List<String> labels) async {
@@ -7,8 +7,7 @@ Future<void> main(List<String> labels) async {
   String parts = "";
   if (versionParts.isNotEmpty) {
     parts = versionParts.join(",");
-    parts = "bump:$parts";
+    parts = "parts=bump:$parts";
   }
-  await Process.run('echo "parts=$parts" >> \$GITHUB_OUTPUT', [],
-      runInShell: true);
+  await setOutput(parts);
 }