Improved UX

- Gracefully handle URL not found
- Gracefully handle I/O error
- Add emojis
- Use a stable JAR file name

action.yml

@@ -25,14 +25,12 @@ runs:
       shell: bash
       run: |
         echo "::group::📦 Download JReleaser"
-        JAR="jreleaser-tool-provider-${{ inputs.version }}.jar"
-        URL="https://github.com/jreleaser/jreleaser/releases/download/${{ inputs.version }}/$JAR"
-        java "${{ github.action_path }}/copy.java" $URL $JAR
-        java -jar $JAR --version
+        java "${{ github.action_path }}/copy.java" ${{ inputs.version }}
+        java -jar jreleaser-cli.jar --version
         echo "::endgroup::"
+
     - name: 'Execute JReleaser'
       shell: bash
       run: |
-        JAR="jreleaser-tool-provider-${{ inputs.version }}.jar"
-        echo "☕ java -jar $JAR ${{ inputs.arguments }}"
-        java -jar $JAR ${{ inputs.arguments }}
+        echo "☕ java -jar jreleaser-cli.jar ${{ inputs.arguments }}"
+        java -jar jreleaser-cli.jar ${{ inputs.arguments }}

copy.java

@@ -1,19 +1,36 @@
+import java.io.FileNotFoundException;
+import java.io.IOException;
 import java.net.URL;
 import java.nio.file.Files;
-import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.nio.file.StandardCopyOption;
 
 class copy {
   public static void main(String... args) throws Exception {
-    if (args.length != 2) {
-      System.err.println("Usage: java copy.java URL FILENAME");
+    if (args.length != 1) {
+      System.err.println("Usage: java copy.java VERSION");
       System.exit(1);
     }
-    var url = args[0];
+
+    // TODO: handle version = 'latest'
+
+    var version = args[0];
+    var url = "https://github.com/jreleaser/jreleaser/releases/download/" + version + "/jreleaser-tool-provider-" + version + ".jar";
+    var file = Paths.get("jreleaser-cli.jar");
+
     try (var stream = new URL(url).openStream()) {
-      var file = Path.of(args[1]);
+      System.out.printf("✅ Located JReleaser %s%n", version);
+      System.out.printf("⬇️  Downloading %s%n", url);
       var size = Files.copy(stream, file, StandardCopyOption.REPLACE_EXISTING);
-      System.out.printf("%s << copied %d bytes << %s%n", file, size, url);
+      System.out.printf("%s << copied %d bytes%n", file, size);
+      System.out.printf("✅ JReleaser installed successfully%n");
+    } catch(FileNotFoundException e) {
+        System.out.printf("❌ JReleaser %s not found%n", version);
+        System.exit(1);
+    } catch(IOException e) {
+        System.out.printf("☠️  JReleaser %s could not be downloaded/copied%n", version);
+        e.printStackTrace();
+        System.exit(1);
     }
   }
 }