feat(commit): 添加.gitignore文件过滤功能，自动跳过被忽略的文件

在自动暂存和`--all`模式下，检测并跳过被.gitignore规则匹配的文件，暂存完成后显示被移除的被忽略文件列表

tests/gitignore_tests.rs

@@ -0,0 +1,266 @@
+use quicommit::git::GitRepo;
+use std::fs;
+use std::path::Path;
+use std::process::Command;
+use tempfile::TempDir;
+
+// ---------------------------------------------------------------------------
+// Helpers
+// ---------------------------------------------------------------------------
+
+/// Run a git command in the given directory, returning stdout as a String.
+/// Panics if the command fails.
+fn git(dir: &Path, args: &[&str]) -> String {
+    let output = Command::new("git")
+        .args(args)
+        .current_dir(dir)
+        .output()
+        .expect("Failed to execute git command");
+    if !output.status.success() {
+        let stderr = String::from_utf8_lossy(&output.stderr);
+        panic!("git {:?} failed in {:?}: {}", args, dir, stderr);
+    }
+    String::from_utf8_lossy(&output.stdout).to_string()
+}
+
+/// Initialize a new git repo in the given directory and configure a local
+/// user identity so commits can be created.
+fn init_repo(dir: &Path) {
+    git(dir, &["init"]);
+    git(dir, &["config", "user.name", "Test User"]);
+    git(dir, &["config", "user.email", "test@example.com"]);
+    // Disable commit signing in case the global config enables it.
+    git(dir, &["config", "commit.gpgsign", "false"]);
+}
+
+/// Write a file with the given content, creating parent directories as needed.
+fn write_file(dir: &Path, rel_path: &str, content: &str) {
+    let file_path = dir.join(rel_path);
+    if let Some(parent) = file_path.parent() {
+        fs::create_dir_all(parent).expect("Failed to create parent directories");
+    }
+    fs::write(&file_path, content).expect("Failed to write file");
+}
+
+/// Get the list of files in the index as a String (one path per line).
+fn ls_files(dir: &Path) -> String {
+    git(dir, &["ls-files"])
+}
+
+// ---------------------------------------------------------------------------
+// Tests for is_path_ignored
+// ---------------------------------------------------------------------------
+
+#[test]
+fn test_is_path_ignored_with_ignored_path() {
+    let temp_dir = TempDir::new().unwrap();
+    let repo_path = temp_dir.path();
+    init_repo(repo_path);
+
+    write_file(repo_path, ".gitignore", "__pycache__/\n");
+    write_file(repo_path, "__pycache__/foo.pyc", "bytecode");
+    write_file(repo_path, "subdir/__pycache__/bar.pyc", "more bytecode");
+
+    let repo = GitRepo::open(repo_path).expect("Failed to open repo");
+
+    // Top-level ignored file
+    assert!(
+        repo.is_path_ignored("__pycache__/foo.pyc").unwrap(),
+        "__pycache__/foo.pyc should be ignored"
+    );
+
+    // Nested ignored file under a subdirectory
+    assert!(
+        repo.is_path_ignored("subdir/__pycache__/bar.pyc").unwrap(),
+        "subdir/__pycache__/bar.pyc should be ignored"
+    );
+}
+
+#[test]
+fn test_is_path_ignored_with_non_ignored_path() {
+    let temp_dir = TempDir::new().unwrap();
+    let repo_path = temp_dir.path();
+    init_repo(repo_path);
+
+    write_file(repo_path, ".gitignore", "__pycache__/\n");
+    write_file(repo_path, "src/main.rs", "fn main() {}");
+
+    let repo = GitRepo::open(repo_path).expect("Failed to open repo");
+
+    assert!(
+        !repo.is_path_ignored("src/main.rs").unwrap(),
+        "src/main.rs should not be ignored"
+    );
+}
+
+// ---------------------------------------------------------------------------
+// Tests for stage_all
+// ---------------------------------------------------------------------------
+
+#[test]
+fn test_stage_all_removes_ignored_tracked_files() {
+    let temp_dir = TempDir::new().unwrap();
+    let repo_path = temp_dir.path();
+    init_repo(repo_path);
+
+    // Create and commit __pycache__/foo.pyc so it becomes a tracked file.
+    write_file(repo_path, "__pycache__/foo.pyc", "original bytecode");
+    git(repo_path, &["add", "__pycache__/foo.pyc"]);
+    git(repo_path, &["commit", "-m", "initial commit"]);
+
+    // Add a .gitignore that now ignores __pycache__/.
+    write_file(repo_path, ".gitignore", "__pycache__/\n");
+
+    // Modify the tracked file so the working tree has unstaged changes.
+    write_file(repo_path, "__pycache__/foo.pyc", "modified bytecode");
+
+    let repo = GitRepo::open(repo_path).expect("Failed to open repo");
+    let removed = repo.stage_all().expect("stage_all should succeed");
+
+    assert!(
+        removed.iter().any(|f| f == "__pycache__/foo.pyc"),
+        "stage_all should return __pycache__/foo.pyc in removed list, got: {:?}",
+        removed
+    );
+
+    // Verify the file is no longer in the index.
+    let files = ls_files(repo_path);
+    assert!(
+        !files.lines().any(|l| l == "__pycache__/foo.pyc"),
+        "__pycache__/foo.pyc should no longer be in the index, got: {}",
+        files
+    );
+}
+
+#[test]
+fn test_stage_all_no_ignored_files_returns_empty() {
+    let temp_dir = TempDir::new().unwrap();
+    let repo_path = temp_dir.path();
+    init_repo(repo_path);
+
+    write_file(repo_path, ".gitignore", "*.log\n");
+    write_file(repo_path, "src/main.rs", "fn main() {}");
+
+    let repo = GitRepo::open(repo_path).expect("Failed to open repo");
+    let removed = repo.stage_all().expect("stage_all should succeed");
+
+    assert!(
+        removed.is_empty(),
+        "stage_all should return empty Vec when no ignored files are tracked, got: {:?}",
+        removed
+    );
+
+    // Verify src/main.rs was staged.
+    let files = ls_files(repo_path);
+    assert!(
+        files.lines().any(|l| l == "src/main.rs"),
+        "src/main.rs should be in the index, got: {}",
+        files
+    );
+}
+
+// ---------------------------------------------------------------------------
+// Tests for stage_files
+// ---------------------------------------------------------------------------
+
+#[test]
+fn test_stage_files_skips_ignored_paths() {
+    let temp_dir = TempDir::new().unwrap();
+    let repo_path = temp_dir.path();
+    init_repo(repo_path);
+
+    write_file(repo_path, ".gitignore", "__pycache__/\n");
+    write_file(repo_path, "__pycache__/foo.pyc", "bytecode");
+    write_file(repo_path, "src/main.rs", "fn main() {}");
+
+    let repo = GitRepo::open(repo_path).expect("Failed to open repo");
+    let skipped = repo
+        .stage_files(&["__pycache__/foo.pyc", "src/main.rs"])
+        .expect("stage_files should succeed");
+
+    assert!(
+        skipped.iter().any(|f| f == "__pycache__/foo.pyc"),
+        "skipped list should contain __pycache__/foo.pyc, got: {:?}",
+        skipped
+    );
+    assert!(
+        !skipped.iter().any(|f| f == "src/main.rs"),
+        "skipped list should not contain src/main.rs, got: {:?}",
+        skipped
+    );
+
+    let files = ls_files(repo_path);
+    assert!(
+        files.lines().any(|l| l == "src/main.rs"),
+        "src/main.rs should be staged, got: {}",
+        files
+    );
+    assert!(
+        !files.lines().any(|l| l == "__pycache__/foo.pyc"),
+        "__pycache__/foo.pyc should not be staged, got: {}",
+        files
+    );
+}
+
+#[test]
+fn test_stage_files_all_paths_ignored() {
+    let temp_dir = TempDir::new().unwrap();
+    let repo_path = temp_dir.path();
+    init_repo(repo_path);
+
+    write_file(repo_path, ".gitignore", "__pycache__/\n");
+    write_file(repo_path, "__pycache__/foo.pyc", "bytecode");
+
+    let repo = GitRepo::open(repo_path).expect("Failed to open repo");
+    let skipped = repo
+        .stage_files(&["__pycache__/foo.pyc"])
+        .expect("stage_files should succeed");
+
+    assert!(
+        skipped.iter().any(|f| f == "__pycache__/foo.pyc"),
+        "skipped list should contain __pycache__/foo.pyc, got: {:?}",
+        skipped
+    );
+
+    // Verify the index remains empty (the file was not staged).
+    let files = ls_files(repo_path);
+    assert!(
+        files.trim().is_empty(),
+        "index should be empty, got: {}",
+        files
+    );
+}
+
+#[test]
+fn test_stage_files_normal_paths_unchanged_behavior() {
+    let temp_dir = TempDir::new().unwrap();
+    let repo_path = temp_dir.path();
+    init_repo(repo_path);
+
+    // No .gitignore (or one that does not match these paths).
+    write_file(repo_path, "src/main.rs", "fn main() {}");
+    write_file(repo_path, "src/lib.rs", "pub fn lib() {}");
+
+    let repo = GitRepo::open(repo_path).expect("Failed to open repo");
+    let skipped = repo
+        .stage_files(&["src/main.rs", "src/lib.rs"])
+        .expect("stage_files should succeed");
+
+    assert!(
+        skipped.is_empty(),
+        "skipped list should be empty, got: {:?}",
+        skipped
+    );
+
+    let files = ls_files(repo_path);
+    assert!(
+        files.lines().any(|l| l == "src/main.rs"),
+        "src/main.rs should be staged, got: {}",
+        files
+    );
+    assert!(
+        files.lines().any(|l| l == "src/lib.rs"),
+        "src/lib.rs should be staged, got: {}",
+        files
+    );
+}