Rewrite version command to show information about Ava and Watchdog

Author: Senither

build.gradle

@@ -6,7 +6,7 @@ plugins {
 apply plugin: 'java'
 apply plugin: 'idea'
 
-version '0.1.7'
+version '0.2.0'
 group 'com.avairebot'
 description = 'AvaIre Watchdog'
 mainClassName = 'com.avairebot.watchdog.Main'
@@ -58,3 +58,15 @@ dependencies {
     compile group: 'commons-cli', name: 'commons-cli', version: '1.3.1'
     testCompile group: 'junit', name: 'junit', version: '4.12'
 }
+
+import org.apache.tools.ant.filters.ReplaceTokens
+
+processResources {
+    filesMatching("**/app.properties") {
+        filter ReplaceTokens, tokens: [
+            "project.version"   : project.version,
+            "project.groupId"   : project.group,
+            "project.artifactId": project.ext.moduleName
+        ]
+    }
+}

src/main/java/com/avairebot/watchdog/AppInfo.java

@@ -0,0 +1,47 @@
+package com.avairebot.watchdog;
+
+import java.io.IOException;
+import java.util.Properties;
+
+public class AppInfo {
+
+    private static AppInfo instance;
+
+    private final String version;
+    private final String groupId;
+    private final String artifactId;
+
+    private AppInfo() {
+        Properties properties = new Properties();
+        try {
+            properties.load(
+                getClass().getClassLoader().getResourceAsStream("app.properties")
+            );
+        } catch (IOException e) {
+            throw new RuntimeException("Failed to load app.properties", e);
+        }
+
+        this.version = properties.getProperty("version");
+        this.groupId = properties.getProperty("groupId");
+        this.artifactId = properties.getProperty("artifactId");
+    }
+
+    public static AppInfo getAppInfo() {
+        if (instance == null) {
+            instance = new AppInfo();
+        }
+        return instance;
+    }
+
+    public String getVersion() {
+        return version;
+    }
+
+    public String getGroupId() {
+        return groupId;
+    }
+
+    public String getArtifactId() {
+        return artifactId;
+    }
+}

src/main/java/com/avairebot/watchdog/Main.java

@@ -38,6 +38,11 @@ public static void main(String[] args) throws IOException {
                 System.exit(ExitCodes.EXIT_CODE_NORMAL);
             }
 
+            if (cmd.hasOption("version")) {
+                VersionFormatter.formatAndSend();
+                System.exit(ExitCodes.EXIT_CODE_NORMAL);
+            }
+
             new Application(cmd);
         } catch (ParseException e) {
             System.out.println(e.getMessage());

src/main/java/com/avairebot/watchdog/VersionFormatter.java

@@ -0,0 +1,55 @@
+package com.avairebot.watchdog;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.Arrays;
+
+class VersionFormatter {
+
+    static void formatAndSend() {
+        ProcessBuilder pb = new ProcessBuilder();
+
+        pb.command(Arrays.asList("java", "-jar", "AvaIre.jar", "--version", "--no-colors"));
+
+        try {
+            Process process = pb.start();
+
+            StringBuilder content = new StringBuilder();
+            try (InputStream inputStream = process.getInputStream()) {
+                InputStreamReader streamReader = new InputStreamReader(inputStream);
+                BufferedReader reader = new BufferedReader(streamReader);
+
+                String line;
+                while ((line = reader.readLine()) != null) {
+                    content.append(line).append("\n");
+                }
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+            process.waitFor();
+            process.destroy();
+
+            if (content.toString().trim().isEmpty()) {
+                System.out.println("No AvaIre.jar file were found, unable to show the version of Ava being used.");
+                System.out.println("Watchdog is version: " + AppInfo.getAppInfo().getVersion());
+                return;
+            }
+
+            for (String line : content.toString().split("\n")) {
+                System.out.println(line);
+                if (line.contains("Version:")) {
+                    StringBuilder watchdogLine = new StringBuilder("\tWatchdog:");
+                    int index = line.indexOf(line.trim().split("\\s+")[1]);
+                    while (watchdogLine.length() < index) {
+                        watchdogLine.append(" ");
+                    }
+                    System.out.println(watchdogLine.append(AppInfo.getAppInfo().getVersion()).toString());
+                }
+            }
+        } catch (IOException | InterruptedException e) {
+            e.printStackTrace();
+        }
+    }
+}

src/main/resources/app.properties

@@ -0,0 +1,3 @@
+version=@project.version@
+groupId=@project.groupId@
+artifactId=@project.artifactId@