feat: overhaul blog system architecture

- Replace Git dependency in `Site` with `Path` for config files
- Refactor `Server` initialization and add browser-opening functionality
- Introduce `BlogBuilder` for blog building logic separation
- Simplify `Main` by delegating build and server logic to `BlogBuilder` and `Server`
- Add CLI enhancements with new options and improved readability

Signed-off-by: Minecon724 <git@m724.eu>

src/main/java/eu/m724/blog/BlogBuilder.java

@@ -0,0 +1,162 @@
+package eu.m724.blog;
+
+import eu.m724.blog.data.Feed;
+import eu.m724.blog.data.Post;
+import eu.m724.blog.data.Site;
+import org.apache.commons.io.file.PathUtils;
+import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.lib.RepositoryBuilder;
+
+import java.io.IOException;
+import java.nio.file.FileAlreadyExistsException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.stream.Collectors;
+
+public class BlogBuilder {
+    private final Git git;
+    private final Path workingDirectory;
+
+    private Site site;
+    private TemplateRenderer template;
+
+    private Path templateDirectory;
+    private Path outputDirectory;
+    private boolean renderDrafts = false;
+
+    public BlogBuilder(Git git) {
+        this.git = git;
+
+        this.workingDirectory = git.getRepository().getDirectory().toPath().getParent();
+        this.templateDirectory = workingDirectory.resolve("template");
+        this.outputDirectory =  workingDirectory.resolve("generated_out");
+    }
+
+    public static BlogBuilder fromPath(Path workingDirectory) throws IOException {
+        var repository = new RepositoryBuilder()
+                .setGitDir(workingDirectory.resolve(".git").toFile())
+                .build();
+        var git = new Git(repository);
+
+        //
+
+        return new BlogBuilder(git);
+    }
+
+    public BlogBuilder templateDirectory(Path templateDirectory) {
+        this.templateDirectory = templateDirectory;
+        return this;
+    }
+
+    public BlogBuilder outputDirectory(Path outputDirectory) {
+        this.outputDirectory = outputDirectory;
+        return this;
+    }
+
+    public BlogBuilder renderDrafts(boolean renderDrafts) {
+        this.renderDrafts = renderDrafts;
+        return this;
+    }
+
+    public void mkdirs(boolean force) throws IOException {
+        if (outputDirectory.toFile().exists()) {
+            if (force) {
+                PathUtils.deleteDirectory(outputDirectory);
+            } else {
+                throw new FileAlreadyExistsException(outputDirectory.toString(), null, "Output directory already exists. --force?");
+            }
+        }
+
+        Files.createDirectory(outputDirectory);
+    }
+
+    public void build() throws IOException {
+        if (site == null)
+            this.site = Site.fromConfig(workingDirectory.resolve("site-config.json"));
+
+        if (template == null)
+            this.template = new TemplateRenderer(templateDirectory);
+
+        copyIfExists(workingDirectory.resolve("assets"), outputDirectory.resolve("assets"));
+        copyIfExists(templateDirectory.resolve("static"), outputDirectory.resolve("static"));
+
+        Files.createDirectory(outputDirectory.resolve("post"));
+        var postDirectory = workingDirectory.resolve("posts");
+        var posts = new ArrayList<Post>();
+
+        try (var stream = Files.walk(postDirectory)) {
+            for (var path : stream.collect(Collectors.toSet())) {
+                if (!Files.isRegularFile(path))
+                    continue; // directory is created below
+
+                if (!path.toString().endsWith(".html")) {
+                    System.out.println("Post " + path.getFileName() + ": unsupported file type");
+                    continue;
+                }
+
+                path = postDirectory.relativize(path);
+                var post = Post.fromFile(git, path);
+
+                if (post.draft() && !renderDrafts) {
+                    System.out.println("Post " + path.getFileName() + ": draft, ignoring");
+                    continue;
+                }
+
+                var render = template.renderPost(site, post);
+                var outFile = outputDirectory.resolve("post").resolve(path);
+
+                try {
+                    Files.createDirectory(outFile.getParent());
+                } catch (FileAlreadyExistsException ignored) { }
+
+                Files.writeString(outFile, render);
+                posts.add(post);
+            }
+        }
+
+        posts.sort(Comparator.comparing(Post::createdAt).reversed());
+        Files.writeString(outputDirectory.resolve("index.html"), template.renderIndex(site, posts));
+
+        Files.writeString(outputDirectory.resolve("posts.rss"), Feed.generateRss(site, posts));
+    }
+
+
+    /* Internal functions */
+
+    private boolean copyTree(Path srcDir, Path destDir) throws IOException {
+        if (!Files.isDirectory(srcDir)) {
+            return false;
+        }
+
+        try (var walk = Files.walk(srcDir)) {
+            for (var src : walk.collect(Collectors.toSet())) {
+                var rel = srcDir.relativize(src);
+                var dest = destDir.resolve(rel);
+
+                if (Files.isRegularFile(src)) {
+                    var parent = dest.getParent();
+
+                    if (!Files.isDirectory(parent)) {
+                        Files.createDirectories(parent);
+                    }
+
+                    Files.copy(src, dest);
+                }
+            }
+        }
+
+        return true;
+    }
+
+    private void copyIfExists(Path srcDir, Path destDir) throws IOException {
+        System.out.print(srcDir);
+
+        if (copyTree(srcDir, destDir)) {
+            System.out.println(" copied");
+        } else {
+            System.out.println(" doesn't exist, not copying");
+        }
+    }
+}

src/main/java/eu/m724/blog/Main.java

@@ -1,25 +1,59 @@
 package eu.m724.blog;
 
-import eu.m724.blog.data.Feed;
-import eu.m724.blog.data.Post;
-import eu.m724.blog.data.Site;
 import org.apache.commons.cli.*;
-import org.apache.commons.io.file.PathUtils;
-import org.eclipse.jgit.api.Git;
-import org.eclipse.jgit.lib.RepositoryBuilder;
 
 import java.io.IOException;
-import java.nio.file.FileAlreadyExistsException;
-import java.nio.file.Files;
 import java.nio.file.Path;
-import java.util.ArrayList;
-import java.util.Comparator;
-import java.util.stream.Collectors;
 
 public class Main {
     public static void main(String[] args) throws IOException {
         System.out.println("Hello world!");
 
+        var commandLine = getCommandLine(args);
+
+        if (commandLine == null)
+            System.exit(2);
+
+        args = commandLine.getArgs();
+
+        var workingDirectory = Path.of(args[0]);
+        var templateDirectory = Path.of(commandLine.getOptionValue("output-dir", workingDirectory.resolve("template").toString()));
+        var outputDirectory = Path.of(commandLine.getOptionValue("output-dir", workingDirectory.resolve("generated_out").toString()));
+        var force = commandLine.hasOption("force");
+
+        var startServer = commandLine.hasOption("server");
+        var openBrowser = !commandLine.hasOption("no-browser");
+        var renderDrafts = commandLine.hasOption("draft") || startServer;
+
+
+        /* Build process */
+
+        var start = System.nanoTime();
+
+        var builder = BlogBuilder.fromPath(workingDirectory)
+                .templateDirectory(templateDirectory)
+                .outputDirectory(outputDirectory)
+                .renderDrafts(renderDrafts);
+
+        builder.mkdirs(force);
+        builder.build();
+
+        var end = System.nanoTime();
+        System.out.printf("Exported to %s (%.2f ms)\n", outputDirectory, (end - start) / 1000000.0);
+
+        /* Server process */
+
+        if (startServer) {
+            var server = new Server(outputDirectory);
+            server.start();
+
+            if (openBrowser) {
+                server.openBrowser();
+            }
+        }
+    }
+
+    private static CommandLine getCommandLine(String[] args) {
         var options = new Options()
                 .addOption("h", "help", false, "Show help")
                 .addOption("f", "force", false, "Overwrite current build")
@@ -30,7 +64,6 @@ public class Main {
                 .addOption("d", "draft", false, "Render drafts. Default: only with server");
 
         CommandLine commandLine;
-        String wdStr;
         try {
             commandLine = new DefaultParser().parse(options, args);
 
@@ -40,145 +73,13 @@ public class Main {
             if (commandLine.getArgs().length == 0)
                 throw new ParseException("Missing required argument: WORKDIR");
 
-            wdStr = commandLine.getArgs()[0];
         } catch (ParseException e) {
             System.out.println(e.getMessage());
             new HelpFormatter().printHelp("blog-software-java [OPTION]... [WORKDIR]", options);
 
-            System.exit(1);
-            return;
+            return null;
         }
 
-
-        var workingDirectory = Path.of(wdStr);
-        var templateDirectory = Path.of(commandLine.getOptionValue("output-dir", workingDirectory.resolve("template").toString()));
-        var outputDirectory = Path.of(commandLine.getOptionValue("output-dir", workingDirectory.resolve("generated_out").toString()));
-        var force = commandLine.hasOption("force");
-
-        var server = commandLine.hasOption("server");
-        var openBrowser = !commandLine.hasOption("no-browser");
-        var renderDrafts = commandLine.hasOption("draft") || server;
-
-        //
-
-        var start = System.nanoTime();
-
-        var repository = new RepositoryBuilder()
-                .setGitDir(workingDirectory.resolve(".git").toFile())
-                .build();
-        var git = new Git(repository);
-
-        //
-
-        if (outputDirectory.toFile().exists()) {
-            if (force) {
-                PathUtils.deleteDirectory(outputDirectory);
-            } else {
-                throw new FileAlreadyExistsException(outputDirectory.toString(), null, "Output directory already exists. --force?");
-            }
-        }
-
-        var site = Site.fromConfig(git);
-        var template = new TemplateRenderer(templateDirectory);
-
-        Files.createDirectory(outputDirectory);
-
-        copyIfExists(workingDirectory.resolve("assets"), outputDirectory.resolve("assets"));
-        copyIfExists(templateDirectory.resolve("static"), outputDirectory.resolve("static"));
-
-        Files.createDirectory(outputDirectory.resolve("post"));
-        var postDirectory = workingDirectory.resolve("posts");
-        var posts = new ArrayList<Post>();
-
-        try (var stream = Files.walk(postDirectory)) {
-            for (var path : stream.collect(Collectors.toSet())) {
-                if (!Files.isRegularFile(path))
-                    continue; // directory is created below
-
-                if (!path.toString().endsWith(".html")) {
-                    System.out.println("Post " + path.getFileName() + ": unsupported file type");
-                    continue;
-                }
-
-                path = postDirectory.relativize(path);
-                var post = Post.fromFile(git, path);
-
-                if (post.draft() && !renderDrafts) {
-                    System.out.println("Post " + path.getFileName() + ": draft, ignoring");
-                    continue;
-                }
-
-                var render = template.renderPost(site, post);
-                var outFile = outputDirectory.resolve("post").resolve(path);
-
-                try {
-                    Files.createDirectory(outFile.getParent());
-                } catch (FileAlreadyExistsException ignored) { }
-
-                Files.writeString(outFile, render);
-                posts.add(post);
-            }
-        }
-
-        posts.sort(Comparator.comparing(Post::createdAt).reversed());
-        Files.writeString(outputDirectory.resolve("index.html"), template.renderIndex(site, posts));
-
-        Files.writeString(outputDirectory.resolve("posts.rss"), Feed.generateRss(site, posts));
-
-
-        var end = System.nanoTime();
-        System.out.printf("Exported to %s (%.2f ms)\n", outputDirectory, (end - start) / 1000000.0);
-
-        if (server) {
-            var listenAddress = new Server(outputDirectory).start();
-            if (openBrowser) {
-                try {
-                    var process = Runtime.getRuntime().exec(new String[] { "xdg-open", "http://" + listenAddress.getHostString() + ":" + listenAddress.getPort() });
-                    var code = process.waitFor();
-                    if (code != 0) {
-                        throw new Exception("Exit code " + code);
-                    }
-                    System.out.println("Opened browser");
-                } catch (Exception e) {
-                    System.out.println("Failed to open browser: " + e);
-                }
-            }
-        }
-    }
-
-    private static boolean copyTree(Path srcDir, Path destDir) throws IOException {
-        if (!Files.isDirectory(srcDir)) {
-            return false;
-        }
-
-        try (var walk = Files.walk(srcDir)) {
-            for (var src : walk.collect(Collectors.toSet())) {
-                var rel = srcDir.relativize(src);
-                var dest = destDir.resolve(rel);
-
-                if (Files.isRegularFile(src)) {
-                    var parent = dest.getParent();
-
-                    if (!Files.isDirectory(parent)) {
-                        Files.createDirectories(parent);
-                    }
-
-                    Files.copy(src, dest);
-                }
-            }
-        }
-
-        return true;
-    }
-
-
-    private static void copyIfExists(Path srcDir, Path destDir) throws IOException {
-        System.out.print(srcDir);
-
-        if (copyTree(srcDir, destDir)) {
-            System.out.println(" copied");
-        } else {
-            System.out.println(" doesn't exist, not copying");
-        }
+        return commandLine;
     }
 }

src/main/java/eu/m724/blog/Server.java

@@ -11,26 +11,39 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 
 public class Server implements HttpHandler {
-    private final InetSocketAddress listenAddress;
     private final Path webroot;
+    private InetSocketAddress listenAddress;
 
-    public Server(InetSocketAddress listenAddress, Path webroot) {
-        this.listenAddress = listenAddress;
+    public Server(Path webroot, InetSocketAddress listenAddress) {
         this.webroot = webroot;
+        this.listenAddress = listenAddress;
     }
 
     public Server(Path webroot) {
-        this(new InetSocketAddress("localhost", 0), webroot);
+        this(webroot, new InetSocketAddress("localhost", 0));
     }
 
-    public InetSocketAddress start() throws IOException {
+    public void start() throws IOException {
         var server = HttpServer.create(listenAddress, 0);
         server.createContext("/", this);
         server.start();
 
         System.out.println("Server started on http:/" + server.getAddress());
 
-        return server.getAddress();
+        this.listenAddress = server.getAddress();
+    }
+
+    public void openBrowser() {
+        try {
+            var process = Runtime.getRuntime().exec(new String[] { "xdg-open", "http://" + listenAddress.getHostString() + ":" + listenAddress.getPort() });
+            var code = process.waitFor();
+            if (code != 0) {
+                throw new Exception("Exit code " + code);
+            }
+            System.out.println("Opened browser");
+        } catch (Exception e) {
+            System.out.println("Failed to open browser: " + e);
+        }
     }
 
     @Override

src/main/java/eu/m724/blog/data/Site.java

@@ -1,10 +1,10 @@
 package eu.m724.blog.data;
 
-import org.eclipse.jgit.api.Git;
 import org.json.JSONObject;
 
 import java.io.IOException;
 import java.nio.file.Files;
+import java.nio.file.Path;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -14,8 +14,8 @@ public record Site(
 
         Map<String, Object> custom
 ) {
-    public static Site fromConfig(Git git) throws IOException {
-        var content = Files.readString(git.getRepository().getDirectory().toPath().getParent().resolve("site-config.json"));
+    public static Site fromConfig(Path path) throws IOException {
+        var content = Files.readString(path);
         var json = new JSONObject(content);
 
         String name = null;