mini asciidoc toc

examples/asciidoc.java

@@ -0,0 +1,59 @@
+//usr/bin/env jbang "$0" "$@" ; exit $?
+//DEPS info.picocli:picocli:4.2.0
+//DEPS org.asciidoctor:asciidoctorj:2.2.0
+
+import org.asciidoctor.Asciidoctor;
+import org.asciidoctor.OptionsBuilder;
+import org.asciidoctor.ast.Document;
+import org.asciidoctor.ast.StructuralNode;
+import org.asciidoctor.jruby.AsciiDocDirectoryWalker;
+import picocli.CommandLine;
+import picocli.CommandLine.Command;
+import picocli.CommandLine.Parameters;
+
+import java.io.File;
+import java.util.Arrays;
+import java.util.concurrent.Callable;
+
+@Command(name = "asciidoc", mixinStandardHelpOptions = true, version = "asciidoc 0.1",
+        description = "prints table of contents for a asciidoc")
+class asciidoc implements Callable<Integer> {
+
+    @Parameters(index = "0", description = "Directory", arity = "1")
+    private File file;
+
+    public static void main(String... args) {
+        int exitCode = new CommandLine(new asciidoc()).execute(args);
+        System.exit(exitCode);
+    }
+
+    @Override
+    public Integer call() throws Exception {
+
+        OptionsBuilder options = OptionsBuilder.options();
+        Asciidoctor asciidoctor = Asciidoctor.Factory.create();
+
+        options.sourcemap(true);
+
+        Iterable<File> files;
+
+        if(file.isDirectory()) {
+            files = new AsciiDocDirectoryWalker(file.getPath());
+        } else {
+            files = Arrays.asList(file);
+        }
+        for(File file : files) {
+            var doc = asciidoctor.loadFile(file, options.asMap());
+            printToc("", doc);
+
+        }
+        return 0;
+    }
+
+    private void printToc(String indent, StructuralNode doc) {
+        if(doc.getTitle()!=null) {
+            System.out.println(indent + doc.getTitle());
+        }
+        doc.getBlocks().forEach(b -> { printToc(indent + " ", b); });
+    }
+}