feature #I64T29 增加脚本语言Lua的支持

liteflow-script-plugin/liteflow-script-lua/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <artifactId>liteflow-script-plugin</artifactId>
+        <groupId>com.yomahub</groupId>
+        <version>${revision}</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>liteflow-script-lua</artifactId>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.yomahub</groupId>
+            <artifactId>liteflow-core</artifactId>
+            <version>${revision}</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.luaj</groupId>
+            <artifactId>luaj-jse</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>

liteflow-script-plugin/liteflow-script-lua/src/main/java/com/yomahub/liteflow/script/lua/LuaScriptExecutor.java

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+package com.yomahub.liteflow.script.lua;
+
+import cn.hutool.core.util.ReUtil;
+import cn.hutool.core.util.StrUtil;
+import com.yomahub.liteflow.script.jsr223.JSR223ScriptExecutor;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * Lua脚本语言的执行器实现
+ * @author Bryan.Zhang
+ * @since 2.9.5
+ */
+public class LuaScriptExecutor extends JSR223ScriptExecutor {
+    @Override
+    protected String scriptEngineName() {
+        return "luaj";
+    }
+
+    @Override
+    protected String convertScript(String script) {
+        String[] lineArray = script.split("\\n");
+        List<String> noBlankLineList = Arrays.stream(lineArray).filter(
+                s -> !StrUtil.isBlank(s)
+        ).collect(Collectors.toList());
+
+        //用第一行的缩进的空格数作为整个代码的缩进量
+        String blankStr = ReUtil.getGroup0("^[ ]*", noBlankLineList.get(0));
+
+        //重新构建脚本
+        StringBuilder scriptSB = new StringBuilder();
+        noBlankLineList.forEach(s
+                -> scriptSB.append(StrUtil.format("{}\n", s.replaceFirst(blankStr, StrUtil.EMPTY))));
+        return scriptSB.toString();
+        //return StrUtil.format("function process()\n{}\nend\nprocess()\n",scriptSB.toString());
+    }
+}

liteflow-script-plugin/liteflow-script-lua/src/main/resources/META-INF/services/com.yomahub.liteflow.script.ScriptExecutor

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+# Lua的实现
+com.yomahub.liteflow.script.lua.LuaScriptExecutor