Reimplement config parsing, add integration tests

tests/common/minio.rs

@@ -0,0 +1,38 @@
+// SPDX-FileCopyrightText: © Matteo Settenvini <matteo.settenvini@montecristosoftware.eu>
+// SPDX-License-Identifier: EUPL-1.2
+
+use {testcontainers::core::WaitFor, testcontainers::Image, testcontainers_modules::minio};
+
+const MINIO_IMAGE_TAG: &'static str = "RELEASE.2024-05-28T17-19-04Z";
+
+pub struct MinIO {
+    inner: minio::MinIO,
+}
+
+impl Image for MinIO {
+    type Args = minio::MinIOServerArgs;
+
+    fn name(&self) -> String {
+        self.inner.name()
+    }
+
+    fn ready_conditions(&self) -> Vec<WaitFor> {
+        vec![WaitFor::message_on_stderr("API:")]
+    }
+
+    fn tag(&self) -> String {
+        MINIO_IMAGE_TAG.into()
+    }
+
+    fn env_vars(&self) -> Box<dyn Iterator<Item = (&String, &String)> + '_> {
+        self.inner.env_vars()
+    }
+}
+
+impl Default for MinIO {
+    fn default() -> Self {
+        Self {
+            inner: Default::default(),
+        }
+    }
+}

tests/common/mod.rs

@@ -0,0 +1,123 @@
+// SPDX-FileCopyrightText: © Matteo Settenvini <matteo.settenvini@montecristosoftware.eu>
+// SPDX-License-Identifier: EUPL-1.2
+
+mod minio;
+
+use {
+    anyhow::{anyhow, Result},
+    reqwest::Url,
+    std::{ptr::null_mut, str::FromStr},
+    testcontainers::{runners::AsyncRunner, ContainerAsync},
+    tokio::io::AsyncBufReadExt as _,
+};
+
+pub struct Test {
+    pub base_url: Url,
+    pub bucket: s3::Bucket,
+    pub serves3: tokio::process::Child,
+    pub minio: ContainerAsync<minio::MinIO>,
+}
+
+const MAXIMUM_SERVES3_INIT_TIMEOUT: std::time::Duration = std::time::Duration::from_secs(5);
+
+const BUCKET_NAME: &'static str = "integration-test-bucket";
+const REGION: &'static str = "test-region";
+const ACCESS_KEY: &'static str = "minioadmin";
+const SECRET_KEY: &'static str = "minioadmin";
+
+impl Test {
+    pub async fn new() -> Result<Self> {
+        // NOTE: right now there is a bug in bollard
+        // that makes testcontainers work in Docker only and
+        // not podman (it is not able to fetch exposed ports).
+        // If this test fails make sure you are using docker.
+        std::env::remove_var("DOCKER_HOST");
+
+        let image = minio::MinIO::default();
+        let container = image.start().await?;
+
+        let endpoint = format!(
+            "http://{host}:{port}",
+            host = container.get_host().await?,
+            port = container.get_host_port_ipv4(9000).await?
+        );
+
+        let credentials = s3::creds::Credentials::new(
+            Some(&ACCESS_KEY),
+            Some(&SECRET_KEY),
+            None,
+            None,
+            Some("test"),
+        )?;
+        let bucket = s3::Bucket::create_with_path_style(
+            &BUCKET_NAME,
+            s3::Region::Custom {
+                region: REGION.into(),
+                endpoint: endpoint.clone(),
+            },
+            credentials,
+            s3::BucketConfiguration::private(),
+        )
+        .await?
+        .bucket;
+
+        let bin = std::env!("CARGO_BIN_EXE_serves3");
+        let mut child = tokio::process::Command::new(bin)
+            .env("SERVES3_ADDRESS", "127.0.0.1")
+            .env("SERVES3_PORT", "0")
+            .env("SERVES3_LOG_LEVEL", "debug")
+            .env(
+                "SERVES3_S3_BUCKET",
+                format!(
+                    r#"{{
+                    name = "{name}",
+                    endpoint = "{endpoint}",
+                    region = "{region}",
+                    access_key_id = "{user}",
+                    secret_access_key = "{secret}",
+                    path_style = true
+                }}"#,
+                    name = BUCKET_NAME,
+                    endpoint = endpoint,
+                    region = &REGION,
+                    user = ACCESS_KEY,
+                    secret = SECRET_KEY
+                ),
+            )
+            .stdout(std::process::Stdio::piped())
+            .spawn()?;
+
+        let base_url = tokio::time::timeout(MAXIMUM_SERVES3_INIT_TIMEOUT, async {
+            let stdout = child.stdout.as_mut().unwrap();
+            let mut lines = tokio::io::BufReader::new(stdout).lines();
+            let re = regex::Regex::new("^Rocket has launched from (http://.+)$").unwrap();
+            while let Some(line) = lines.next_line().await? {
+                println!("{}", &line);
+                if let Some(captures) = re.captures(&line) {
+                    let url = captures.get(1).unwrap().as_str();
+                    return Ok(Url::from_str(url)?);
+                }
+            }
+
+            Err(anyhow!("Rocket did not print that it has started"))
+        })
+        .await??;
+
+        Ok(Self {
+            base_url,
+            bucket,
+            serves3: child,
+            minio: container,
+        })
+    }
+}
+
+impl Drop for Test {
+    fn drop(&mut self) {
+        unsafe {
+            let pid = self.serves3.id().unwrap() as i32;
+            libc::kill(pid, libc::SIGTERM);
+            libc::waitpid(pid, null_mut(), 0);
+        }
+    }
+}