feat: add native Qt support and dcr lint command; refactor architecture and integration tests

tests/common/mod.rs

@@ -0,0 +1,101 @@
+use std::path::{Path, PathBuf};
+use std::process::Command;
+use std::sync::Once;
+use std::sync::atomic::{AtomicUsize, Ordering};
+use std::time::{SystemTime, UNIX_EPOCH};
+
+static COUNTER: AtomicUsize = AtomicUsize::new(0);
+static BUILD_ONCE: Once = Once::new();
+
+pub fn bin_path() -> PathBuf {
+    if let Ok(exe) = std::env::var("CARGO_BIN_EXE_dcr") {
+        return PathBuf::from(exe);
+    }
+    ensure_bin_built();
+    let mut path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+    path.push("target");
+    path.push("debug");
+    path.push(format!("dcr{}", std::env::consts::EXE_SUFFIX));
+    path
+}
+
+pub fn unique_sandbox_dir(prefix: &str) -> PathBuf {
+    let pid = std::process::id();
+    let n = COUNTER.fetch_add(1, Ordering::SeqCst);
+    let now = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .unwrap_or_default()
+        .as_nanos();
+    let mut path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+    path.push("sandbox");
+    path.push("cli-tests");
+    path.push(format!("dcr_{prefix}_{pid}_{n}_{now}"));
+    std::fs::create_dir_all(&path).expect("failed to create temp dir");
+    path
+}
+
+pub fn run_dcr(args: &[&str], cwd: &Path) -> std::process::Output {
+    run_dcr_env(args, cwd, &[])
+}
+
+pub fn run_dcr_env(args: &[&str], cwd: &Path, envs: &[(&str, &str)]) -> std::process::Output {
+    let mut cmd = Command::new(bin_path());
+    cmd.args(args).current_dir(cwd);
+    for (k, v) in envs {
+        cmd.env(k, v);
+    }
+    cmd.output().expect("failed to run dcr")
+}
+
+pub fn ensure_bin_built() {
+    BUILD_ONCE.call_once(|| {
+        let status = Command::new("cargo")
+            .arg("build")
+            .current_dir(env!("CARGO_MANIFEST_DIR"))
+            .status()
+            .expect("failed to run cargo build");
+        assert!(status.success(), "cargo build failed");
+    });
+}
+
+#[allow(dead_code)]
+pub fn available_compiler() -> Option<&'static str> {
+    for candidate in ["gcc", "clang", "cc"] {
+        let ok = Command::new(candidate)
+            .arg("--version")
+            .output()
+            .map(|o| o.status.success())
+            .unwrap_or(false);
+        if ok {
+            return Some(candidate);
+        }
+    }
+    None
+}
+
+#[allow(dead_code)]
+pub fn is_git_in_path() -> bool {
+    std::process::Command::new("git")
+        .arg("--version")
+        .output()
+        .map(|o| o.status.success())
+        .unwrap_or(false)
+}
+
+#[allow(dead_code)]
+pub fn parse_project_name(toml: &str) -> String {
+    toml.lines()
+        .find(|l| l.trim().starts_with("name ="))
+        .and_then(|l| l.split('=').nth(1))
+        .map(|s| s.trim().trim_matches('"').to_string())
+        .expect("could not parse project name from dcr.toml")
+}
+
+#[allow(dead_code)]
+pub fn default_artifact_path(project_root: &Path, project_name: &str) -> PathBuf {
+    project_root
+        .join("target")
+        .join("x86_64-unknown-linux-gnu")
+        .join("debug")
+        .join(project_name)
+}