refactor: [torrust#634] no need to change dir to temp dir

We only need to create the config file for the tracker_checker in a temp dir but it can be executed from the root dir.

src/e2e/docker.rs

@@ -13,7 +13,7 @@ pub struct RunningContainer {
 }
 
 impl Drop for RunningContainer {
-    /// Ensures that the temporary container is stopped and removed when the 
+    /// Ensures that the temporary container is stopped and removed when the
     /// struct goes out of scope.
     fn drop(&mut self) {
         let _unused = Docker::stop(self);

src/e2e/runner.rs

@@ -19,32 +19,30 @@ pub const NUMBER_OF_ARGUMENTS: usize = 2;
 ///
 /// Will panic if it can't not perform any of the operations.
 pub fn run() {
+    // todo: const
+    let container_tag: &str = "torrust-tracker:local";
+    let tracker_checker_config_file = "tracker_checker.json";
+
     setup_logging(LevelFilter::Info);
 
     let args = parse_arguments();
 
+    // Setup tracker configuration
     info!("Reading tracker configuration from file: {} ...", args.tracker_config_path);
-
     let tracker_config = read_tracker_config(&args.tracker_config_path);
 
-    let container_tag: &str = "torrust-tracker:local";
-    let tracker_checker_config_file = "tracker_checker.json";
-
+    // Build tracker container image
     Docker::build("./Containerfile", container_tag).expect("A tracker local docker image should be built");
 
+    // Create temp dir
     info!(
         "Current dir: {:?}",
         env::current_dir().expect("It should return the current dir")
     );
-
     let temp_dir_handler = Handler::new().expect("A temp dir should be created");
     info!("Temp dir created: {:?}", temp_dir_handler.temp_dir);
 
-    info!("Change dir to: {:?}", temp_dir_handler.temp_dir);
-    temp_dir_handler
-        .change_to_temp_dir()
-        .expect("The app should change dir to the temp dir");
-
+    // Run the tracker container
     let container_name = generate_random_container_name("tracker_");
 
     // code-review: if we want to use port 0 we don't know which ports we have to open.
@@ -68,6 +66,8 @@ pub fn run() {
 
     info!("Container {container_name} is healthy ...");
 
+    // Extract running services from container logs
+
     let logs = Docker::logs(&container_name).expect("Logs should be captured from running container");
 
     debug!("Logs after starting the container:\n{logs}");
@@ -77,20 +77,20 @@ pub fn run() {
 
     let json = serde_json::to_string_pretty(&config).expect("Running services should be serialized into JSON");
 
-    let tracker_checker_config_path = format!("./{tracker_checker_config_file}");
+    // Write tracker_checker configuration file
 
-    let mut file = File::create(tracker_checker_config_path.clone()).expect("Tracker checker config file to be created");
+    let mut absolute_tracker_checker_config_path = PathBuf::from(&temp_dir_handler.temp_dir.path());
+    absolute_tracker_checker_config_path.push(tracker_checker_config_file);
+
+    let mut file = File::create(absolute_tracker_checker_config_path.clone()).expect("Tracker checker config file to be created");
     file.write_all(json.as_bytes())
         .expect("Tracker checker config file to be written");
-    info!("Tracker checker configuration file: {tracker_checker_config_path} \n{json}");
-
-    info!("Revert current dir to: {:?}", temp_dir_handler.original_dir);
-    temp_dir_handler
-        .revert_to_original_dir()
-        .expect("The app should revert dir from temp dir to the original one");
+    info!(
+        "Tracker checker configuration file: {:?} \n{json}",
+        absolute_tracker_checker_config_path
+    );
 
-    let mut absolute_tracker_checker_config_path = PathBuf::from(&temp_dir_handler.temp_dir.path());
-    absolute_tracker_checker_config_path.push(tracker_checker_config_file);
+    // Run the tracker_checker
 
     info!(
         "Running tacker checker: cargo --bin tracker_checker {}",
@@ -99,6 +99,8 @@ pub fn run() {
 
     run_tracker_checker(&absolute_tracker_checker_config_path).expect("Tracker checker should check running services");
 
+    // End: container will be removed automatically when the `RunningContainer` is dropped.
+
     info!("Running container `{}` will be automatically removed", container.name);
 }
 

tracker_checker.json

@@ -0,0 +1,11 @@
+{
+  "udp_trackers": [
+    "127.0.0.1:6969"
+  ],
+  "http_trackers": [
+    "http://127.0.0.1:7070"
+  ],
+  "health_checks": [
+    "http://127.0.0.1:1313/health_check"
+  ]
+}