Merge pull request #26 from fermyon/improve-service-errors

Improve errors related to services

crates/test-environment/src/services.rs

@@ -126,7 +126,7 @@ fn get_builtin_service_definitions(
         return Ok(Vec::new());
     }
 
-    std::fs::read_dir(service_definitions_path)
+    let result = std::fs::read_dir(service_definitions_path)
         .with_context(|| {
             format!(
                 "no service definitions found at '{}'",
@@ -147,7 +147,7 @@ fn get_builtin_service_definitions(
             Ok((file_name.to_owned(), file_extension.to_owned()))
         })
         .filter(|r| !matches!(r, Ok((_, extension)) if extension == "lock"))
-        .filter(move |r| match r {
+        .filter(|r| match r {
             Ok((service, _)) => builtins.remove(service.as_str()),
             _ => false,
         })
@@ -157,18 +157,22 @@ fn get_builtin_service_definitions(
                 name: name.clone(),
                 kind: match extension.as_str() {
                     "py" => ServiceKind::Python {
-                        script: service_definitions_path.join(format!("{}.py", name)),
+                        script: service_definitions_path.join(format!("{name}.py")),
                     },
                     "Dockerfile" => ServiceKind::Docker {
                         image: docker::DockerImage::FromDockerfile(
-                            service_definitions_path.join(format!("{}.Dockerfile", name)),
+                            service_definitions_path.join(format!("{name}.Dockerfile")),
                         ),
                     },
-                    _ => bail!("unsupported service definition extension '{}'", extension),
+                    _ => bail!("unsupported service definition extension '{extension}'"),
                 },
             })
         })
-        .collect()
+        .collect();
+    if !builtins.is_empty() {
+        bail!("no service definitions found for: {builtins:?}",);
+    }
+    result
 }
 
 /// A service definition.

crates/test-environment/src/services/docker.rs

@@ -164,7 +164,12 @@ fn build_image(dockerfile_path: &Path, image_name: &String) -> anyhow::Result<()
         .stdout(Stdio::null())
         .stderr(Stdio::piped())
         .output()
-        .context("service failed to spawn")?;
+        .with_context(|| {
+            format!(
+                "docker build failed to spawn for Dockerfile '{}'",
+                dockerfile_path.display()
+            )
+        })?;
 
     if !output.status.success() {
         let stderr = std::str::from_utf8(&output.stderr).unwrap_or("<non-utf8>");
@@ -196,7 +201,7 @@ fn run_container(image_name: &str) -> anyhow::Result<Container> {
         .arg("--health-start-period=1s")
         .arg(image_name)
         .output()
-        .context("service failed to spawn")?;
+        .with_context(|| format!("docker run failed to spawn for image '{image_name}'"))?;
     if !output.status.success() {
         bail!("failed to run docker image");
     }

crates/test-environment/src/services/python.rs

@@ -34,7 +34,7 @@ impl PythonService {
             .arg(script_path.display().to_string())
             .stdout(Stdio::piped())
             .spawn()
-            .context("service failed to spawn")?;
+            .with_context(|| format!("python failed to spawn for '{}'", script_path.display()))?;
         std::thread::sleep(std::time::Duration::from_millis(1000));
         Ok(Self {
             stdout: OutputStream::new(