feat: 实现Snow 语言统一命令行入口(CLI)
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parent
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2
pom.xml
2
pom.xml
@ -35,7 +35,7 @@
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<configuration>
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<archive>
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<manifest>
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<mainClass>org.jcnc.snow.compiler.cli.SnowCompiler</mainClass>
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<mainClass>org.jcnc.snow.compiler.cli.SnowCLI</mainClass>
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<addClasspath>true</addClasspath>
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</manifest>
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</archive>
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@ -1,4 +1,5 @@
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module org.jcnc.snow.compiler {
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uses org.jcnc.snow.compiler.cli.CLICommand;
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requires java.desktop;
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requires java.logging;
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exports org.jcnc.snow.compiler.ir.core;
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44
src/main/java/org/jcnc/snow/compiler/cli/CLICommand.java
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44
src/main/java/org/jcnc/snow/compiler/cli/CLICommand.java
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@ -0,0 +1,44 @@
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package org.jcnc.snow.compiler.cli;
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/**
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* <p>
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* 所有子命令(如 compile、run 等)都必须实现的命令接口。
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* </p>
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* <ul>
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* <li>实现类应当是无状态(stateless)、线程安全(thread-safe)的。</li>
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* <li>可通过 {@link java.util.ServiceLoader ServiceLoader} 自动发现,或直接在 {@link SnowCLI} 注册。</li>
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* </ul>
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* <p>
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*/
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public interface CLICommand {
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/**
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* 获取命令的名称(如 "compile"、"run")。
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*
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* @return 命令名字符串
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*/
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String name();
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/**
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* 获取命令的一行简介(用于 help 列表)。
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*
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* @return 命令描述字符串
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*/
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String description();
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/**
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* 打印命令的专用 usage 信息(可选实现)。
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* 可覆盖此方法自定义帮助信息,默认无操作。
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*/
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default void printUsage() {}
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/**
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* 执行命令逻辑。
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*
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* @param args 传递给子命令的参数(不含命令名本身)
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* @return 进程退出码(0 为成功,非0为错误)
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* @throws Exception 可抛出任意异常,框架会统一捕获和输出
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*/
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int execute(String[] args) throws Exception;
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}
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120
src/main/java/org/jcnc/snow/compiler/cli/SnowCLI.java
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120
src/main/java/org/jcnc/snow/compiler/cli/SnowCLI.java
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@ -0,0 +1,120 @@
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package org.jcnc.snow.compiler.cli;
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import org.jcnc.snow.compiler.cli.commands.CompileCommand;
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import org.jcnc.snow.compiler.cli.commands.RunCommand;
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import java.util.*;
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/**
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* <p>
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* Snow 语言统一命令行入口(CLI)。
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* <br>
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* 负责命令注册、解析与调度。
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* </p>
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* <pre>
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* 示例用法:
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* $ snow help
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* $ snow compile main.snow
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* $ snow run main.vm
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* </pre>
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* <ul>
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* <li>支持核心命令自动注册(compile/run)。</li>
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* <li>支持通过 ServiceLoader 自动发现并注册第三方命令。</li>
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* <li>统一异常处理和 usage 帮助输出。</li>
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* </ul>
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*/
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public final class SnowCLI {
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/** 命令注册表,按插入顺序保存命令名到实现的映射。 */
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private final Map<String, CLICommand> registry = new LinkedHashMap<>();
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/**
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* 构造 CLI,自动注册所有可用命令。
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* <ul>
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* <li>通过 ServiceLoader 加载所有外部扩展命令。</li>
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* <li>始终内置注册 compile、run 等核心命令。</li>
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* </ul>
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*/
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public SnowCLI() {
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// 1. 自动发现 ServiceLoader 扩展命令
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ServiceLoader.load(CLICommand.class).forEach(this::register);
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// 2. 注册核心命令,保证 CLI 可用
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register(new CompileCommand());
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register(new RunCommand());
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}
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/**
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* 注册一个命令到 CLI(命令名唯一,若已注册则跳过)。
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*
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* @param cmd 待注册命令
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*/
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private void register(CLICommand cmd) {
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registry.putIfAbsent(cmd.name(), cmd);
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}
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/**
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* 解析命令行参数并执行相应命令。
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*
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* @param args 命令行参数
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* @return 进程退出码(0=成功, 1=未知命令, -1=命令异常)
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*/
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public int run(String[] args) {
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// 无参数或 help,打印全局用法
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if (args.length == 0
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|| Set.of("help", "-h", "--help").contains(args[0])) {
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printGlobalUsage();
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return 0;
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}
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// 根据命令名查找注册表
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CLICommand cmd = registry.get(args[0]);
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if (cmd == null) {
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System.err.printf("Unknown command: %s%n%n", args[0]);
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printGlobalUsage();
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return 1;
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}
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// 提取命令余下参数(不包含命令名)
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String[] sub = Arrays.copyOfRange(args, 1, args.length);
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try {
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return cmd.execute(sub);
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} catch (Exception e) {
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System.err.printf("Error executing command '%s': %s%n",
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cmd.name(), e.getMessage());
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e.printStackTrace(System.err);
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return -1;
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}
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}
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/**
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* 打印全局帮助信息(所有已注册命令的 usage)。
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*/
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private void printGlobalUsage() {
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System.out.println("""
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Snow Programming Language CLI
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Usage: snow <command> [options]
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Available commands:""");
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int pad = registry.keySet().stream()
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.mapToInt(String::length).max().orElse(10) + 2;
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registry.values().stream()
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.sorted(Comparator.comparing(CLICommand::name))
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.forEach(c -> System.out.printf(" %-" + pad + "s%s%n",
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c.name(), c.description()));
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System.out.println("""
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Use 'snow <command> --help' for command-specific details.
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""");
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}
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/**
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* CLI 程序主入口。
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*
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* @param args 命令行参数
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*/
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public static void main(String[] args) {
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int code = new SnowCLI().run(args);
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System.exit(code);
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}
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}
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@ -1,143 +0,0 @@
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package org.jcnc.snow.compiler.cli;
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import org.jcnc.snow.compiler.backend.alloc.RegisterAllocator;
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import org.jcnc.snow.compiler.backend.builder.VMCodeGenerator;
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import org.jcnc.snow.compiler.backend.builder.VMProgramBuilder;
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import org.jcnc.snow.compiler.backend.core.InstructionGenerator;
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import org.jcnc.snow.compiler.backend.generator.InstructionGeneratorProvider;
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import org.jcnc.snow.compiler.ir.builder.IRProgramBuilder;
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import org.jcnc.snow.compiler.ir.core.IRFunction;
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import org.jcnc.snow.compiler.ir.core.IRInstruction;
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import org.jcnc.snow.compiler.ir.core.IRProgram;
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import org.jcnc.snow.compiler.ir.value.IRVirtualRegister;
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import org.jcnc.snow.compiler.lexer.core.LexerEngine;
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import org.jcnc.snow.compiler.parser.ast.base.Node;
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import org.jcnc.snow.compiler.parser.context.ParserContext;
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import org.jcnc.snow.compiler.parser.core.ParserEngine;
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import org.jcnc.snow.compiler.parser.function.ASTPrinter;
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import org.jcnc.snow.compiler.semantic.core.SemanticAnalyzerRunner;
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import org.jcnc.snow.vm.engine.VMMode;
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import org.jcnc.snow.vm.engine.VirtualMachineEngine;
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import java.io.IOException;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.util.*;
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/**
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* SnowCompiler CLI —— 多文件 / 单文件 / 目录 模式。
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*/
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public class SnowCompiler {
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public static void main(String[] args) throws IOException {
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if (args.length == 0) {
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System.err.println("""
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Usage:
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snow <file1.snow> [file2.snow …]
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snow -d <srcDir> (compile all *.snow recursively)
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""");
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return;
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}
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/* ---------- 1. 收集所有待编译源码 ---------- */
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List<Path> sources = collectSources(args);
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if (sources.isEmpty()) {
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System.err.println("No .snow source files found.");
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return;
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}
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/* ---------- 2. 逐个词法+语法分析,合并 AST ---------- */
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List<Node> allAst = new ArrayList<>();
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for (Path p : sources) {
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if (!Files.exists(p)) {
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System.err.println("File not found: " + p);
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return;
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}
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String code = Files.readString(p, StandardCharsets.UTF_8);
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// 保持原有“## 源代码”打印,但标注文件名,兼容旧脚本
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System.out.println("## 源代码 (" + p.getFileName() + ")");
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System.out.println(code);
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LexerEngine lexer = new LexerEngine(code, p.toString());
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ParserContext ctx = new ParserContext(lexer.getAllTokens(), p.toString());
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allAst.addAll(new ParserEngine(ctx).parse());
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}
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/* ---------- 3. 语义分析 ---------- */
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SemanticAnalyzerRunner.runSemanticAnalysis(allAst, false);
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/* ---------- 4. AST → IR ---------- */
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IRProgram program = new IRProgramBuilder().buildProgram(allAst);
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program = reorderForEntry(program); // 保证入口 main 在首位
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System.out.println("## 编译器输出");
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System.out.println("### AST");
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ASTPrinter.printJson(allAst);
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System.out.println("### IR");
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System.out.println(program);
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/* ---------- 5. IR → VM 指令 ---------- */
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VMProgramBuilder builder = new VMProgramBuilder();
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List<InstructionGenerator<? extends IRInstruction>> generators = InstructionGeneratorProvider.defaultGenerators();
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for (IRFunction fn : program.functions()) {
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Map<IRVirtualRegister, Integer> slotMap =
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new RegisterAllocator().allocate(fn);
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new VMCodeGenerator(slotMap, builder, generators).generate(fn);
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}
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List<String> finalCode = builder.build();
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System.out.println("### VM code");
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finalCode.forEach(System.out::println);
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/* ---------- 6. 运行虚拟机 ---------- */
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VirtualMachineEngine vm = new VirtualMachineEngine(VMMode.RUN);
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vm.execute(finalCode);
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vm.printLocalVariables();
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}
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/**
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* 根据参数收集待编译文件:
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* - snow file1 file2 … ← 多文件 / 单文件
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* - snow -d srcDir ← 目录递归所有 *.snow
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*/
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private static List<Path> collectSources(String[] args) throws IOException {
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if (args.length == 2 && "-d".equals(args[0])) {
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Path dir = Path.of(args[1]);
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if (!Files.isDirectory(dir)) {
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System.err.println("Not a directory: " + dir);
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return List.of();
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}
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try (var stream = Files.walk(dir)) {
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return stream.filter(p -> p.toString().endsWith(".snow"))
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.sorted() // 稳定顺序,方便比对输出
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.toList();
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}
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}
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// 普通文件参数
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return Arrays.stream(args).map(Path::of).toList();
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}
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/**
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* 把 main 函数放到 Program.functions()[0],保证 PC=0 即入口;
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* 如果用户未写 main,则保持原顺序(语义分析会报错)。
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*/
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private static IRProgram reorderForEntry(IRProgram in) {
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List<IRFunction> ordered = new ArrayList<>(in.functions());
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int idx = -1;
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for (int i = 0; i < ordered.size(); i++) {
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if ("main".equals(ordered.get(i).name())) {
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idx = i;
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break;
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}
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}
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if (idx > 0) Collections.swap(ordered, 0, idx);
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IRProgram out = new IRProgram();
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ordered.forEach(out::add);
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return out;
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}
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}
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@ -0,0 +1,233 @@
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package org.jcnc.snow.compiler.cli.commands;
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import org.jcnc.snow.compiler.cli.CLICommand;
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import org.jcnc.snow.compiler.backend.alloc.RegisterAllocator;
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import org.jcnc.snow.compiler.backend.builder.VMCodeGenerator;
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import org.jcnc.snow.compiler.backend.builder.VMProgramBuilder;
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import org.jcnc.snow.compiler.backend.core.InstructionGenerator;
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import org.jcnc.snow.compiler.backend.generator.InstructionGeneratorProvider;
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import org.jcnc.snow.compiler.ir.builder.IRProgramBuilder;
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import org.jcnc.snow.compiler.ir.core.IRFunction;
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import org.jcnc.snow.compiler.ir.core.IRInstruction;
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import org.jcnc.snow.compiler.ir.core.IRProgram;
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import org.jcnc.snow.compiler.ir.value.IRVirtualRegister;
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import org.jcnc.snow.compiler.lexer.core.LexerEngine;
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import org.jcnc.snow.compiler.parser.ast.base.Node;
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import org.jcnc.snow.compiler.parser.context.ParserContext;
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import org.jcnc.snow.compiler.parser.core.ParserEngine;
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import org.jcnc.snow.compiler.parser.function.ASTPrinter;
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import org.jcnc.snow.compiler.semantic.core.SemanticAnalyzerRunner;
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import org.jcnc.snow.vm.VMLauncher;
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import java.io.IOException;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.util.*;
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/**
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* <p>
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* 编译器命令行入口:实现 `snow compile` 命令。
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* 支持编译一个或多个 .snow 源文件为 VM 字节码文件,或编译后直接运行。
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* </p>
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* <ul>
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* <li>支持编译单个文件、多个文件、或目录递归批量编译。</li>
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* <li>支持 compile-only 或 compile-then-run 模式。</li>
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* <li>完成词法、语法、语义分析,IR 构建,寄存器分配,VM 指令生成。</li>
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* </ul>
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* <p>
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* 用法:<br>
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* <code>snow compile foo.snow</code><br>
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* <code>snow compile -d src</code><br>
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* <code>snow compile run foo.snow</code>
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* </p>
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*/
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public final class CompileCommand implements CLICommand {
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/**
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* 获取命令名称。
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*
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* @return 命令名 "compile"
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*/
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@Override
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public String name() { return "compile"; }
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/**
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* 获取命令的简要描述。
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*
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* @return 命令描述文本
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*/
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@Override
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public String description() {
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return "Compile .snow source files into VM byte-code.";
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}
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/**
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* 打印用法说明。
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*/
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@Override
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public void printUsage() {
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System.out.println("""
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Usage:
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snow compile <file1.snow> [file2.snow …] (compile only)
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snow compile -d <srcDir> (recursively compile)
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snow compile run <file.snow> […] (compile then run)
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""");
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}
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/**
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* 执行 compile 命令。
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*
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* @param args 命令行参数
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* @return 0 表示成功,非0表示错误
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* @throws Exception 发生任何编译、文件、运行错误
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*/
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@Override
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public int execute(String[] args) throws Exception {
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// 0. 检查是否包含 run
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boolean runAfterCompile = false;
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int offset = 0;
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if (args.length > 0 && "run".equals(args[0])) {
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runAfterCompile = true;
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offset = 1;
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}
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if (args.length - offset == 0) {
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printUsage();
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return 1;
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}
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String[] srcArgs = Arrays.copyOfRange(args, offset, args.length);
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List<Path> sources = collectSources(srcArgs);
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if (sources.isEmpty()) {
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System.err.println("No .snow source files found.");
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return 1;
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}
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|
||||
// 1. 词法+语法分析,合并AST
|
||||
List<Node> allAst = new ArrayList<>();
|
||||
for (Path p : sources) {
|
||||
if (!Files.exists(p)) {
|
||||
System.err.println("File not found: " + p);
|
||||
return 1;
|
||||
}
|
||||
String code = Files.readString(p, StandardCharsets.UTF_8);
|
||||
LexerEngine lexer = new LexerEngine(code, p.toString());
|
||||
ParserContext ctx = new ParserContext(lexer.getAllTokens(), p.toString());
|
||||
allAst.addAll(new ParserEngine(ctx).parse());
|
||||
}
|
||||
|
||||
// 2. 语义分析
|
||||
SemanticAnalyzerRunner.runSemanticAnalysis(allAst, false);
|
||||
|
||||
// 3. AST -> IR
|
||||
IRProgram program = new IRProgramBuilder().buildProgram(allAst);
|
||||
program = reorderForEntry(program); // 保证入口 main 在首位
|
||||
|
||||
System.out.println("## 编译器输出");
|
||||
System.out.println("### AST");
|
||||
ASTPrinter.printJson(allAst);
|
||||
System.out.println("### IR");
|
||||
System.out.println(program);
|
||||
|
||||
// 4. IR -> VM指令
|
||||
VMProgramBuilder builder = new VMProgramBuilder();
|
||||
List<InstructionGenerator<? extends IRInstruction>> generators =
|
||||
InstructionGeneratorProvider.defaultGenerators();
|
||||
|
||||
for (IRFunction fn : program.functions()) {
|
||||
Map<IRVirtualRegister, Integer> slotMap =
|
||||
new RegisterAllocator().allocate(fn);
|
||||
new VMCodeGenerator(slotMap, builder, generators).generate(fn);
|
||||
}
|
||||
List<String> finalCode = builder.build();
|
||||
|
||||
System.out.println("### VM code");
|
||||
finalCode.forEach(System.out::println);
|
||||
|
||||
// 5. 将VM指令写入文件
|
||||
Path outputFile = deriveOutputPath(sources);
|
||||
Files.write(outputFile, finalCode, StandardCharsets.UTF_8);
|
||||
System.out.println("Written to " + outputFile.toAbsolutePath());
|
||||
|
||||
// 6. 若指定run,立即执行
|
||||
if (runAfterCompile) {
|
||||
System.out.println("\n=== Launching VM ===");
|
||||
VMLauncher.main(new String[]{outputFile.toString()});
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* 收集所有待编译的源文件。
|
||||
* <ul>
|
||||
* <li>参数 "-d <srcDir>":递归收集目录下所有 .snow 文件</li>
|
||||
* <li>否则认为是文件列表参数</li>
|
||||
* </ul>
|
||||
*
|
||||
* @param args 命令行参数
|
||||
* @return 源文件路径列表,若未找到返回空列表
|
||||
* @throws IOException 文件IO错误
|
||||
*/
|
||||
private static List<Path> collectSources(String[] args) throws IOException {
|
||||
if (args.length == 2 && "-d".equals(args[0])) {
|
||||
Path dir = Path.of(args[1]);
|
||||
if (!Files.isDirectory(dir)) {
|
||||
System.err.println("Not a directory: " + dir);
|
||||
return List.of();
|
||||
}
|
||||
try (var stream = Files.walk(dir)) {
|
||||
return stream.filter(p -> p.toString().endsWith(".snow"))
|
||||
.sorted() // 稳定顺序,方便比对输出
|
||||
.toList();
|
||||
}
|
||||
}
|
||||
// 普通文件参数
|
||||
return Arrays.stream(args).map(Path::of).toList();
|
||||
}
|
||||
|
||||
/**
|
||||
* 保证 main 函数排在 Program.functions()[0],使 PC=0 即为程序入口。
|
||||
* <ul>
|
||||
* <li>若存在 main,则与第0个函数互换</li>
|
||||
* <li>若不存在 main,则顺序不变(后续语义分析会报错)</li>
|
||||
* </ul>
|
||||
*
|
||||
* @param in 原始IR程序对象
|
||||
* @return 处理后的IR程序对象
|
||||
*/
|
||||
private static IRProgram reorderForEntry(IRProgram in) {
|
||||
List<IRFunction> ordered = new ArrayList<>(in.functions());
|
||||
int idx = -1;
|
||||
for (int i = 0; i < ordered.size(); i++) {
|
||||
if ("main".equals(ordered.get(i).name())) {
|
||||
idx = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (idx > 0) Collections.swap(ordered, 0, idx);
|
||||
|
||||
IRProgram out = new IRProgram();
|
||||
ordered.forEach(out::add);
|
||||
return out;
|
||||
}
|
||||
|
||||
/**
|
||||
* 推断输出文件名。
|
||||
* <ul>
|
||||
* <li>单文件编译:输出同名 .vm 文件</li>
|
||||
* <li>多文件/目录编译:输出 "program.vm" 到当前目录</li>
|
||||
* </ul>
|
||||
*
|
||||
* @param sources 输入源文件路径列表
|
||||
* @return 输出的 VM 文件路径
|
||||
*/
|
||||
private static Path deriveOutputPath(List<Path> sources) {
|
||||
if (sources.size() == 1) {
|
||||
Path src = sources.getFirst();
|
||||
String name = src.getFileName().toString()
|
||||
.replaceFirst("\\.snow$", "");
|
||||
return src.resolveSibling(name + ".vm");
|
||||
}
|
||||
return Path.of("program.vm");
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,68 @@
|
||||
package org.jcnc.snow.compiler.cli.commands;
|
||||
|
||||
import org.jcnc.snow.compiler.cli.CLICommand;
|
||||
import org.jcnc.snow.vm.VMLauncher;
|
||||
|
||||
/**
|
||||
* <p>
|
||||
* 命令实现:`snow run`
|
||||
* <br>
|
||||
* 用于运行已编译的 VM 字节码文件(.vm)。
|
||||
* </p>
|
||||
* <ul>
|
||||
* <li>支持传递额外 VM 参数。</li>
|
||||
* <li>实际执行通过 {@link VMLauncher#main(String[])} 入口完成。</li>
|
||||
* </ul>
|
||||
* <p>
|
||||
* 用法:<br>
|
||||
* <code>snow run program.vm</code>
|
||||
* </p>
|
||||
*/
|
||||
public final class RunCommand implements CLICommand {
|
||||
|
||||
/**
|
||||
* 获取命令名。
|
||||
*
|
||||
* @return "run"
|
||||
*/
|
||||
@Override
|
||||
public String name() { return "run"; }
|
||||
|
||||
/**
|
||||
* 获取命令描述。
|
||||
*
|
||||
* @return 命令简介
|
||||
*/
|
||||
@Override
|
||||
public String description() {
|
||||
return "Execute compiled VM instructions.";
|
||||
}
|
||||
|
||||
/**
|
||||
* 打印该命令的用法说明。
|
||||
*/
|
||||
@Override
|
||||
public void printUsage() {
|
||||
System.out.println("""
|
||||
Usage: snow run <program.vm> [additional VM options]
|
||||
""");
|
||||
}
|
||||
|
||||
/**
|
||||
* 执行 run 命令,运行 VM 指令文件。
|
||||
*
|
||||
* @param args 剩余参数(不含命令名),第一个应为 .vm 文件路径
|
||||
* @return 0 表示成功,1 表示参数错误
|
||||
* @throws Exception 运行 VM 时可能抛出的异常
|
||||
*/
|
||||
@Override
|
||||
public int execute(String[] args) throws Exception {
|
||||
if (args.length == 0) {
|
||||
printUsage();
|
||||
return 1;
|
||||
}
|
||||
// 直接复用 VM 启动逻辑
|
||||
VMLauncher.main(args);
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user