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核心功能:
实战步骤:
# 安装Simian(通过NuGet或直接下载)
dotnet tool install --global Simian.Tool
<simian>
<source>
<fileset dir="src">
<include name="**/*.cs" />
fileset>
source>
<cloneThreshold>30cloneThreshold>
<language>cslanguage>
<output>
<htmlOutput>report/simian_report.htmlhtmlOutput>
<xmlOutput>report/simian_report.xmlxmlOutput>
output>
simian>
配置解析:
cloneThreshold
:设置克隆代码的最小行数language
:指定C#语言解析output
:生成HTML/XML报告# 执行检测命令
simian -formatter html -formatter xml -output report/simian_report -threshold 30 *.cs
结果示例:
<h2>克隆代码1h2>
<pre>
public void CalculateTotal() {
decimal total = 0;
foreach (var item in items) {
total += item.Price * item.Quantity;
}
}
pre>
<h2>克隆代码2h2>
<pre>
public void CalculateTotal() {
decimal total = 0;
foreach (var item in items) {
total += item.Cost * item.Number;
}
}
pre>
代码解析:
Price→Cost
, Quantity→Number
)核心功能:
实战步骤:
# 通过扩展管理器搜索“Clone Detective”并安装
{
"cloneThreshold": 5, // 最小克隆行数
"ignoreWhitespace": true, // 忽略空格和换行
"reportFormat": "xml", // 输出格式
"excludedFiles": [ // 排除文件
"GeneratedCode.cs",
"ThirdPartyLibrary.cs"
]
}
// 右键解决方案 → Clone Detective → Analyze Solution
结果示例:
<cloneGroup id="1">
<clone>
<file>MyClass1.csfile>
<startLine>10startLine>
<endLine>20endLine>
clone>
<clone>
<file>MyClass2.csfile>
<startLine>15startLine>
<endLine>25endLine>
clone>
cloneGroup>
代码解析:
核心功能:
实战步骤:
# 安装ANTLR4(通过NuGet)
dotnet add package Antlr4
// 定义C#语法的ANTLR4 grammar
grammar CSharpCode;
compilationUnit
: using* namespace* typeDeclaration* EOF
;
using
: 'using' qualifiedName ';'
;
namespace
: 'namespace' qualifiedName '{' namespaceBody '}'
;
// 关键:提取AST节点
class CSharpASTListener : CSharpCodeBaseListener {
public List<string> ExtractASTNodes() {
var nodes = new List<string>();
foreach (var node in ASTStack) {
if (node is MethodDeclarationContext) {
nodes.Add(node.GetText()); // 提取方法体
}
}
return nodes;
}
}
// 使用示例
public void DetectClones() {
var code = File.ReadAllText("MyClass.cs");
var lexer = new CSharpCodeLexer(new AntlrInputStream(code));
var tokens = new CommonTokenStream(lexer);
var parser = new CSharpCodeParser(tokens);
var tree = parser.compilationUnit();
var listener = new CSharpASTListener();
ParseTreeWalker.Default.Walk(listener, tree);
var astNodes = listener.ExtractASTNodes();
}
代码解析:
// 重构前
public decimal CalculateTotal() => items.Sum(i => i.Price * i.Quantity);
public decimal CalculateTotal() => items.Sum(i => i.Cost * i.Number);
// 重构后
public decimal CalculateTotal(Func<Item, decimal> selector) => items.Sum(selector);
代码解析:
// 原始代码
public void ProcessOrder() {
ValidateItems();
CalculateTax();
SendEmail();
}
public void ProcessRefund() {
ValidateItems();
CalculateTax();
SendEmail();
}
// 重构后
private void CommonProcess() {
ValidateItems();
CalculateTax();
SendEmail();
}
public void ProcessOrder() => CommonProcess();
public void ProcessRefund() => CommonProcess();
代码解析:
CommonProcess
方法// 原始代码
public void HandlePayment(string type) {
if (type == "CreditCard") {
// 信用卡支付逻辑
} else if (type == "PayPal") {
// PayPal支付逻辑
}
}
// 重构后
interface IPaymentStrategy {
void Pay(decimal amount);
}
class CreditCardStrategy : IPaymentStrategy {
public void Pay(decimal amount) { /* ... */ }
}
class PayPalStrategy : IPaymentStrategy {
public void Pay(decimal amount) { /* ... */ }
}
public class PaymentContext {
private IPaymentStrategy _strategy;
public void SetStrategy(IPaymentStrategy strategy) => _strategy = strategy;
public void ExecutePayment(decimal amount) => _strategy.Pay(amount);
}
代码解析:
// 原始代码
public class OrderProcessor {
public void Process() {
// 复杂的订单处理逻辑
}
}
public class RefundProcessor {
public void Process() {
// 类似的处理逻辑
}
}
// 重构后(模板方法模式)
abstract class AbstractProcessor {
public void Process() {
Initialize();
Execute();
Finalize();
}
protected abstract void Execute();
}
class OrderProcessor : AbstractProcessor {
protected override void Execute() { /* ... */ }
}
class RefundProcessor : AbstractProcessor {
protected override void Execute() { /* ... */ }
}
代码解析:
# GitHub Actions配置示例
jobs:
build:
runs-on: windows-latest
steps:
- uses: actions/checkout@v2
- name: Install Simian
run: dotnet tool install --global Simian.Tool
- name: Run Simian
run: simian -formatter html -formatter xml -output report/simian_report -threshold 30 *.cs
- name: Upload Report
uses: actions/upload-artifact@v2
with:
name: simian-report
path: report/
代码解析:
从 Simian 的“量子纠缠探测”到 ANTLR 的“语法解剖”,再到 Clone Detective 的“DNA分析”,C#代码克隆检测已经进入“全自动”时代!
记住这 5大秘籍: