重构: scan.rs拆4模块(stack/discover/readme/sample)共享常量提mod.rs
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176
crates/df-project/src/scan/stack.rs
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176
crates/df-project/src/scan/stack.rs
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//! 技术栈探测 — 浅读根目录标志文件识别技术栈。
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//!
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//! 纯函数、零状态。读 `Cargo.toml`/`go.mod`/`package.json` 等标志,
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//! 不递归遍历(控制性能与安全)。
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use std::path::Path;
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use anyhow::{Context, Result};
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/// 探测目录的技术栈
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///
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/// 返回去重后的技术栈标签数组(如 `["rust","vue","tauri","typescript"]`)。
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/// 空数组表示未识别出任何已知标志(空目录或非常规项目)。非目录返回 Err。
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pub fn detect_stack(root: &Path) -> Result<Vec<String>> {
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if !root.is_dir() {
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anyhow::bail!("路径不是目录: {}", root.display());
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}
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let mut stack: Vec<String> = Vec::new();
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// ── 后端/系统语言 ──
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if root.join("Cargo.toml").exists() {
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push_unique(&mut stack, "rust");
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}
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if root.join("go.mod").exists() {
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push_unique(&mut stack, "go");
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}
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if root.join("pom.xml").exists()
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|| root.join("build.gradle").exists()
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|| root.join("build.gradle.kts").exists()
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{
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push_unique(&mut stack, "java");
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}
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if root.join("pyproject.toml").exists() || root.join("requirements.txt").exists() {
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push_unique(&mut stack, "python");
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}
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// C#: 根目录存在 .csproj 文件(仅一层)
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if has_file_with_ext(root, "csproj") {
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push_unique(&mut stack, "csharp");
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}
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// ── Tauri 桌面应用(通常含 src-tauri 目录) ──
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if root.join("src-tauri").is_dir() {
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push_unique(&mut stack, "tauri");
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}
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// ── 前端/Node:解析 package.json 的依赖推断框架 ──
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if root.join("package.json").exists() {
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if let Ok(deps) = read_package_deps(root.join("package.json")) {
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if deps.iter().any(|d| d == "vue") {
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push_unique(&mut stack, "vue");
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}
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if deps.iter().any(|d| d == "react" || d == "react-dom") {
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push_unique(&mut stack, "react");
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}
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if deps.iter().any(|d| d == "@angular/core") {
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push_unique(&mut stack, "angular");
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}
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if deps.iter().any(|d| d == "svelte") {
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push_unique(&mut stack, "svelte");
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}
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if deps.iter().any(|d| d == "next") {
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push_unique(&mut stack, "next");
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}
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if deps.iter().any(|d| d == "vite") {
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push_unique(&mut stack, "vite");
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}
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if deps.iter().any(|d| d == "typescript") {
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push_unique(&mut stack, "typescript");
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}
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if deps.iter().any(|d| d == "express" || d == "koa" || d == "fastify") {
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push_unique(&mut stack, "node");
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}
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}
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}
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Ok(stack)
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}
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/// 解析 package.json,合并 dependencies + devDependencies 的包名
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fn read_package_deps(path: impl AsRef<Path>) -> Result<Vec<String>> {
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let content = std::fs::read_to_string(path.as_ref())
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.with_context(|| format!("读取 package.json 失败: {}", path.as_ref().display()))?;
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let pkg: serde_json::Value = serde_json::from_str(&content).context("解析 package.json 失败")?;
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let mut names = Vec::new();
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for key in &["dependencies", "devDependencies"] {
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if let Some(obj) = pkg.get(key).and_then(|v| v.as_object()) {
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for k in obj.keys() {
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names.push(k.clone());
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}
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}
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}
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Ok(names)
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}
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/// 目录下是否存在指定扩展名的文件(仅一层)。
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///
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/// 被 `detect_stack`(C# csproj)与 `super::discover`(项目清单判定)共用,
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/// 故 `pub(super)`。
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pub(super) fn has_file_with_ext(dir: &Path, ext: &str) -> bool {
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let Ok(entries) = std::fs::read_dir(dir) else {
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return false;
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};
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entries.flatten().any(|e| {
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e.path()
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.extension()
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.and_then(|x| x.to_str())
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.map(|x| x == ext)
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.unwrap_or(false)
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})
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}
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/// 去重 push
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fn push_unique(stack: &mut Vec<String>, s: &str) {
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if !stack.iter().any(|x| x == s) {
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stack.push(s.to_string());
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use std::fs;
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use std::path::PathBuf;
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/// 在系统临时目录建唯一子目录(以进程号隔离并发),返回路径
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fn scratch(name: &str) -> PathBuf {
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let mut p = std::env::temp_dir();
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p.push(format!("df-project-scan-{}-{}", name, std::process::id()));
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let _ = fs::remove_dir_all(&p);
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fs::create_dir_all(&p).unwrap();
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p
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}
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#[test]
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fn non_dir_errors() {
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let r = detect_stack(Path::new("definitely-not-exist-xyz-123"));
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assert!(r.is_err());
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}
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#[test]
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fn detects_rust() {
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let d = scratch("rust");
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fs::write(d.join("Cargo.toml"), "").unwrap();
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let s = detect_stack(&d).unwrap();
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assert!(s.contains(&"rust".to_string()));
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fs::remove_dir_all(&d).ok();
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}
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#[test]
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fn detects_full_stack() {
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// 模拟 DevFlow 自身:rust + tauri + vue + vite + typescript
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let d = scratch("full");
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fs::write(d.join("Cargo.toml"), "").unwrap();
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fs::create_dir(d.join("src-tauri")).unwrap();
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fs::write(
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d.join("package.json"),
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r#"{"dependencies":{"vue":"^3.5.0"},"devDependencies":{"vite":"^6.0.0","typescript":"~5.6.0"}}"#,
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)
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.unwrap();
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let s = detect_stack(&d).unwrap();
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assert!(s.contains(&"rust".to_string()));
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assert!(s.contains(&"tauri".to_string()));
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assert!(s.contains(&"vue".to_string()));
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assert!(s.contains(&"vite".to_string()));
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assert!(s.contains(&"typescript".to_string()));
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fs::remove_dir_all(&d).ok();
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}
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#[test]
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fn empty_dir_returns_empty() {
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let d = scratch("empty");
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let s = detect_stack(&d).unwrap();
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assert!(s.is_empty());
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fs::remove_dir_all(&d).ok();
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}
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}
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