Add usage sample

.gitignore

@@ -42,4 +42,8 @@ bin/
 .vscode/
 
 ### Mac OS ###
-.DS_Store
+.DS_Store
+
+### QuickCode stuff ###
+hello
+hello.kt

README.md

@@ -14,6 +14,12 @@ It's designed to be learned at a single glance. Use:
 When you evaluate/execute your template [Compose Hammer](https://plugins.jetbrains.com/plugin/21912-compose-hammer) will ask
 you to provide values for the defined variables.
 
+### Usage
+
+```
+./gradlew run --args="samples/hello.kt.qc samples/hello_input.json"
+```
+
 ## Syntax
 
 **Keywords:**

samples/hello.kt.qc

@@ -0,0 +1,6 @@
+fun main() {
+    println("Hello, {{name}}!")
+#if {{morning}} #then
+    println("Good morning :)")
+#endif
+}

samples/hello_input.json

@@ -1,4 +1,4 @@
 {
-  "name": "Iliyan",
-  "wishNiceDay": true
+  "name": "QuickCode",
+  "morning": true
 }

src/main/kotlin/com/ivy/quickcode/Main.kt

@@ -7,13 +7,14 @@ import kotlinx.serialization.json.boolean
 import kotlinx.serialization.json.booleanOrNull
 import java.nio.file.Files
 import java.nio.file.Paths
+import kotlin.io.path.name
 
 fun main(args: Array<String>) {
+    // TODO: Extract this as a class, handle errors cases and test it
     if (args.size != 2) {
         println("Invalid arguments!")
         return
     }
-
     val template = readFileContent(args[0])
     val inputJson = readFileContent(args[1])
     val rawInput: Map<String, JsonPrimitive> = Json.decodeFromString(inputJson)
@@ -31,11 +32,26 @@ fun main(args: Array<String>) {
     val compiler = QuickCodeCompiler()
     val result = compiler.execute(template, input)
     println("----------------")
+    produceOutputFile(
+        templatePath = args[0],
+        result = result,
+    )
     println("----------------")
     println(result)
 }
 
 fun readFileContent(relativePath: String): String {
     val path = Paths.get(relativePath)
     return Files.readString(path)
+}
+
+fun produceOutputFile(templatePath: String, result: String) {
+    val path = Paths.get(templatePath)
+    val fileName = path.fileName.name
+    val outputFilename = fileName.dropLast(3)
+    Files.writeString(
+        Paths.get(outputFilename),
+        result
+    )
+    println("'$outputFilename' created.")
 }