feat: add license and --version -v (#3)

package.json

@@ -1,6 +1,7 @@
 {
   "name": "slangroom-exec",
   "module": "index.ts",
+  "license": "AGPL-3.0-or-later",
   "type": "module",
   "devDependencies": {
     "@semantic-release/changelog": "^6.0.3",

src/index.ts

@@ -1,4 +1,34 @@
 import { slangroom_exec } from "./lib";
+const packageJson = require("../package.json");
+
+const argv = Bun.argv;
+
+if (argv.includes("-v") || argv.includes("--version")) {
+	console.log(`${packageJson.name} ${packageJson.version}`);
+  console.error(`
+      _
+     | |
+  ___| | _____ ____   ____  ____ ___   ___  ____ _____ _____ _   _ _____  ____
+ /___) |(____ |  _ \ / _  |/ ___) _ \ / _ \|    (_____) ___ ( \ / ) ___ |/ ___)
+|___ | |/ ___ | | | ( (_| | |  | |_| | |_| | | | |    | ____|) X (| ____( (___
+(___/ \_)_____|_| |_|\___ |_|   \___/ \___/|_|_|_|    |_____|_/ \_)_____)\____)
+                    (_____|
+`)
+	console.error(`Built for ${process.platform}-${process.arch}
+Copyright (C) 2024 ${packageJson.author}
+License AGPL-3.0-or-later: GNU AGPL version 3 <https://www.gnu.org/licenses/agpl-3.0.html>
+This is free software: you are free to change and redistribute it
+There is NO WARRANTY, to the extent permitted by law.`);
+	process.exit(0);
+}
+
+if (argv.includes("-h") || argv.includes("--help")) {
+	console.log(`Usage: cat <encoded_input> | ${packageJson.name} [options]
+Options:
+  -v, --version   Show version
+  -h, --help      Show this help message`);
+	process.exit(0);
+}
 
 const the_input = await Bun.stdin.text();
 const the_output = await slangroom_exec(the_input);

test/e2e.bats

@@ -36,7 +36,7 @@ setup() {
     assert_success
 }
 
-@test "should fail on empty slangroom" {
+@test "should fail on empty or broken contract" {
     load_fixture "broken_conf"
     run_slangroom_exec
     assert_output "Malformed input: Slangroom contract is empty"
@@ -49,3 +49,21 @@ setup() {
     assert_output --partial "Invalid Zencode prefix 1: 'Gibberish'"
     assert_failure 1
 }
+
+@test "should fail on empty contract" {
+    load_fixture "empty"
+    run_slangroom_exec
+    assert_output "Malformed input: Slangroom contract is empty"
+    assert_failure 1
+}
+
+@test "should show the version and header" {
+		run ./slangroom-exec -v
+    assert_output --partial "License AGPL-3.0-or-later: GNU AGPL version 3 <https://www.gnu.org/licenses/agpl-3.0.html>"
+		assert_output --partial "Copyright (C) 2024 undefined"
+		assert_output --partial "slangroom-exec"
+		run ./slangroom-exec --version
+    assert_output --partial "License AGPL-3.0-or-later: GNU AGPL version 3 <https://www.gnu.org/licenses/agpl-3.0.html>"
+		assert_output --partial "Copyright (C) 2024 undefined"
+		assert_output --partial "slangroom-exec"
+}

test/fixtures/broken.slang

@@ -0,0 +1,4 @@
+Rule unknown ignore
+Given I fetch the local timestamp in seconds and output into 'timestamp'
+Given I have a 'time' named 'timestamp'
+Then print the 'timestamp'