Add CLI

3 files changed, 109 insertions, 1 deletions

diff --git a/src/main/java/org/shedlang/compiler/ShedCompiler.java b/src/main/java/org/shedlang/compiler/ShedCompiler.java
new file mode 100644
index 00000000..a7949d53
--- /dev/null
+++ b/src/main/java/org/shedlang/compiler/ShedCompiler.java
@@ -0,0 +1,63 @@
+package org.shedlang.compiler;
+
+import org.shedlang.compiler.parser.Parser;
+import org.shedlang.compiler.sources.Sources;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.FileVisitResult;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.SimpleFileVisitor;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+
+import static org.shedlang.compiler.parser.Tokeniser.tokenise;
+
+public class ShedCompiler {
+    public void compile(Path projectRoot) throws IOException {
+        var sourceRoot = projectRoot.resolve("src");
+
+        var sourceFilePaths = collectSourceFilePaths(sourceRoot);
+
+        for (var sourceFilePath : sourceFilePaths) {
+            System.out.println(sourceFilePath);
+
+            var sourceContents = Files.readString(sourceFilePath, StandardCharsets.UTF_8);
+            var source = Sources.file(sourceFilePath.toString(), sourceContents);
+            var tokens = tokenise(source);
+            var node = Parser.parseNamespace(tokens);
+            System.out.println(node);
+
+            System.out.println();
+        }
+    }
+
+    private List<Path> collectSourceFilePaths(Path sourceRoot) throws IOException {
+        var paths = new ArrayList<Path>();
+        Files.walkFileTree(sourceRoot, new SimpleFileVisitor<Path>() {
+            @Override
+            public FileVisitResult visitFile(
+                Path file,
+                BasicFileAttributes attrs
+            ) {
+                if (file.getFileName().toString().endsWith(".shed")) {
+                    paths.add(file);
+                }
+                return FileVisitResult.CONTINUE;
+            }
+
+            @Override
+            public FileVisitResult postVisitDirectory(
+                Path dir,
+                IOException exc
+            ) {
+                return FileVisitResult.CONTINUE;
+            }
+        });
+        paths.sort(Comparator.naturalOrder());
+        return paths;
+    }
+}
diff --git a/src/main/java/org/shedlang/compiler/cli/ShedcCli.java b/src/main/java/org/shedlang/compiler/cli/ShedcCli.java
new file mode 100644
index 00000000..82549f97
--- /dev/null
+++ b/src/main/java/org/shedlang/compiler/cli/ShedcCli.java
@@ -0,0 +1,45 @@
+package org.shedlang.compiler.cli;
+
+import net.sourceforge.argparse4j.ArgumentParsers;
+import net.sourceforge.argparse4j.inf.ArgumentParserException;
+import net.sourceforge.argparse4j.inf.Namespace;
+import org.shedlang.compiler.ShedCompiler;
+import org.shedlang.compiler.errors.SourceError;
+
+import java.io.IOException;
+import java.nio.file.Paths;
+
+public class ShedcCli {
+    public static void main(String[] rawArgs) throws IOException {
+        var args = parseArgs(rawArgs);
+        try {
+            compile(args);
+        } catch (SourceError error) {
+            System.err.println(error.getSource().describe());
+            System.err.println(error.getMessage());
+            System.exit(2);
+        }
+    }
+
+    private static void compile(Namespace args) throws IOException {
+        var sourcePath = Paths.get(args.getString("source"));
+
+        var compiler = new ShedCompiler();
+        compiler.compile(sourcePath);
+    }
+
+    private static Namespace parseArgs(String[] args) {
+        var parser = ArgumentParsers.newFor("shedc").build()
+            .defaultHelp(true);
+
+        parser.addArgument("source").required(true);
+
+        try {
+            return parser.parseArgs(args);
+        } catch (ArgumentParserException e) {
+            parser.handleError(e);
+            System.exit(1);
+            throw new RuntimeException(e);
+        }
+    }
+}
diff --git a/src/main/java/org/shedlang/compiler/parser/Parser.java b/src/main/java/org/shedlang/compiler/parser/Parser.java
index 384cd694..5b17e80d 100644
--- a/src/main/java/org/shedlang/compiler/parser/Parser.java
+++ b/src/main/java/org/shedlang/compiler/parser/Parser.java
@@ -240,7 +240,7 @@ public class Parser {
         return new UntypedTypeLevelReferenceNode(name, source);
     }
 
-    static UntypedNamespaceNode parseNamespace(TokenIterator<TokenType> tokens) {
+    public static UntypedNamespaceNode parseNamespace(TokenIterator<TokenType> tokens) {
         var start = tokens.position();
         var end = tokens.position();