Initial Maven project structure

src/main/java/tech/bitgoblin/App.java

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+package tech.bitgoblin;
+
+import tech.bitgoblin.config.Config;
+
+/**
+ * The Bit Goblin video transcoder service.
+ *
+ */
+public class App {
+
+  private static final String configFile = "~/.config/pigeon.toml";
+
+  public static void main(String[] args) {
+    // read our config file
+    Config c = new Config(configFile);
+  }
+
+}

src/main/java/tech/bitgoblin/config/Config.java

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+package tech.bitgoblin.config;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import org.tomlj.Toml;
+import org.tomlj.TomlParseResult;
+import tech.bitgoblin.io.IOUtils;
+
+public class Config {
+
+  private final String configPath;
+  private TomlParseResult result;
+
+  public Config(String path) {
+    this.configPath = IOUtils.resolveTilda(path);
+    // parse config file
+    try {
+      this.parseConfig();
+    } catch (IOException e) {
+      System.out.println("Unable to read config file; please check that " + this.configPath + " is available.");
+      System.exit(1);
+    }
+  }
+
+  public String getString(String key) {
+    return this.result.getString(key);
+  }
+
+  public boolean contains(String key) {
+    return this.result.contains(key);
+  }
+
+  private void parseConfig() throws IOException {
+    // parse config file
+    Path source = Paths.get(this.configPath);
+    this.result = Toml.parse(source);
+    this.result.errors().forEach(error -> System.err.println(error.toString()));
+  }
+
+}

src/main/java/tech/bitgoblin/io/IOUtils.java

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+package tech.bitgoblin.io;
+
+import java.io.File;
+
+public class IOUtils {
+
+  public static void createDirectory(String path) {
+    File f = new File(path);
+    boolean res = f.mkdir();
+
+    if (res) {
+      System.out.println(path + " was created.");
+    }
+  }
+
+  public static String resolveTilda(String path) {
+    if (path.startsWith("~" + File.separator) || path.equals("~")) {
+      path = System.getProperty("user.home") + path.substring(1);
+    } else if ((!path.equals("~")) && path.startsWith("~")) {
+      // here you can implement reading homedir of other users if you care
+      throw new UnsupportedOperationException("Home dir expansion not implemented for explicit usernames");
+    }
+
+    return path;
+  }
+
+}

src/test/java/tech/bitgoblin/AppTest.java

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+package tech.bitgoblin;
+
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+/**
+ * Unit test for simple App.
+ */
+public class AppTest 
+{
+    /**
+     * Rigorous Test :-)
+     */
+    @Test
+    public void shouldAnswerWithTrue()
+    {
+        assertTrue( true );
+    }
+}

src/test/java/tech/bitgoblin/io/IOUtilsTest.java

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+package tech.bitgoblin.io;
+
+import static org.junit.Assert.assertTrue;
+
+import org.junit.AfterClass;
+import org.junit.Test;
+
+import java.io.File;
+
+public class IOUtilsTest {
+
+  private static String testDir = "test-temp";
+
+  @Test
+  public void shouldCreateDirectory() {
+    IOUtils.createDirectory(testDir);
+    assertTrue(new File(testDir).exists());
+  }
+
+  @Test
+  public void shouldExpandTilda() {
+    String homeExpanded = IOUtils.resolveTilda("~");
+    assertTrue(!homeExpanded.equals("~"));
+  }
+
+  @Test(expected=UnsupportedOperationException.class)
+  public void shouldFailExpandExplicitTilda() {
+    IOUtils.resolveTilda("~test");
+  }
+
+  @AfterClass
+  public static void cleanup() {
+    new File(testDir).delete();
+  }
+
+}