.devcontainer/Dockerfile

@@ -1,4 +1,4 @@
-FROM debian:trixie
+FROM rust:1.97-trixie
 
 ARG USERNAME=dev
 ARG USER_UID=1000
@@ -18,11 +18,10 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     && rm -rf /var/lib/apt/lists/*
 
 RUN groupadd --gid ${USER_GID:-1000} $USERNAME \
-    && useradd --uid ${USER_UID:-1000} --gid ${USER_GID:-1000} -m $USERNAME
+    && useradd --uid ${USER_UID:-1000} --gid ${USER_GID:-1000} -m $USERNAME \
+    && rustup component add clippy
+
+
 
 USER $USERNAME
 WORKDIR /home/$USERNAME
-
-ENV PATH="/home/${USERNAME}/.cargo/bin:${PATH}"
-
-RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain stable

.devcontainer/devcontainer.json

@@ -19,5 +19,6 @@
     },
     "workspaceMount": "source=${localWorkspaceFolder},target=/workspaces/herald,type=bind",
     "workspaceFolder": "/workspaces/herald",
+   	"runArgs": ["--userns=keep-id", "--security-opt", "label=disable"],
     "appPort": [3000]
 }

.dockerignore

@@ -1,4 +0,0 @@
-target/
-.env
-.devcontainer/
-docs/

.vscode/settings.json

@@ -1,3 +0,0 @@
-{
-    "rust-analyzer.check.command": "clippy"
-}

.zed/settings.json

@@ -0,0 +1,11 @@
+{
+    "lsp": {
+        "rust-analyzer": {
+            "initialization_options": {
+                "check": {
+                    "command": "clippy"
+                }
+            }
+        }
+    }
+}

Cargo.lock

@@ -490,6 +490,18 @@ dependencies = [
  "unicode-xid",
 ]
 
+[[package]]
+name = "devcontainer-rs"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "serde",
+ "serde_json",
+ "tempfile",
+ "thiserror 2.0.18",
+ "tokio",
+]
+
 [[package]]
 name = "dispatch2"
 version = "0.3.1"
@@ -787,12 +799,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ed5909b6e89a2db4456e54cd5f673791d7eca6732202bbf2a9cc504fe2f9b84a"
 
 [[package]]
-name = "herald"
+name = "herald-server"
-version = "1.1.0"
+version = "1.2.0"
 dependencies = [
  "anyhow",
  "axum",
  "bytes",
+ "devcontainer-rs",
  "dotenvy",
  "futures-util",
  "hex",

Cargo.toml

@@ -1,12 +1,11 @@
-[package]
+[workspace]
-name = "herald"
+members = [
-version = "1.1.0"
+    "crates/herald-server",
-edition = "2024"
+    "crates/devcontainer-rs",
+]
+resolver = "3"
 
-[profile.release]
+[workspace.dependencies]
-debug = 1
-
-[dependencies]
 reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls"] }
 tokio = { version = "1.53", features = ["full"] }
 tokio-stream = "0.1"
@@ -19,9 +18,9 @@ sentry-anyhow = { version = "0.48", features = ["backtrace"] }
 openrouter-rs = "0.12"
 dotenvy = "0.15"
 tower = "0.5"
-tower-http = {version = "0.6", features = ["trace"] }
+tower-http = { version = "0.6", features = ["trace"] }
 tracing = "0.1"
-tracing-subscriber = { version = "0.3", features=["env-filter"] }
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 axum = "0.8"
 anyhow = { version = "1.0", features = ["backtrace"] }
 thiserror = "2.0"
@@ -30,3 +29,6 @@ hex = "0.4"
 bytes = "1.1"
 metrics = "0.24"
 metrics-exporter-prometheus = { version = "0.18", default-features = false, features = ["http-listener"] }
+
+[profile.release]
+debug = 1

Containerfile

@@ -1,12 +1,15 @@
-FROM rust:1.96 as builder
+FROM rust:1.97-trixie as builder
 
 WORKDIR /app
-COPY . .
+
-RUN cargo build --release
+COPY Cargo.toml Cargo.lock ./
+COPY crates/ crates/
+
+RUN cargo build --release --package herald-server
 
 
 FROM debian:trixie-slim
 
 WORKDIR /app
-COPY --from=builder /app/target/release/herald .
+COPY --from=builder /app/target/release/herald-server .
-CMD [ "./herald" ]
+CMD [ "./herald-server" ]

crates/devcontainer-rs/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "devcontainer-rs"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+tokio = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+anyhow = { workspace = true }
+thiserror = { workspace = true }
+
+[dev-dependencies]
+tempfile = "3"

crates/devcontainer-rs/src/lib.rs

@@ -0,0 +1,175 @@
+use std::{
+    collections::HashMap,
+    path::{Path, PathBuf},
+};
+
+use serde::Deserialize;
+
+#[derive(Debug, Deserialize)]
+pub struct DevContainerBuildSchema {
+    #[serde(default)]
+    pub dockerfile: Option<String>,
+    #[serde(default)]
+    pub args: HashMap<String, String>,
+}
+
+#[derive(Debug, Deserialize)]
+pub struct DevContainerSchema {
+    #[serde(default)]
+    pub name: Option<String>,
+    pub build: DevContainerBuildSchema,
+
+    #[serde(rename = "workspaceFolder", default)]
+    pub workspace_folder: Option<String>,
+
+    #[serde(rename = "containerEnv", default)]
+    pub container_env: HashMap<String, String>,
+
+    #[serde(rename = "postCreateCommand", default)]
+    pub post_create_command: Option<String>,
+
+    #[serde(rename = "postStartCommand", default)]
+    pub post_start_command: Option<String>,
+}
+
+#[derive(Debug)]
+pub struct DevContainer {
+    /// Absolute or relative path to the Dockerfile/Containerfile to build.
+    pub container_file_path: PathBuf,
+    pub name: Option<String>,
+    pub build_args: HashMap<String, String>,
+    pub container_env: HashMap<String, String>,
+    pub workspace_folder: Option<String>,
+    pub post_create_command: Option<String>,
+    pub post_start_command: Option<String>,
+}
+
+#[derive(Debug, thiserror::Error)]
+pub enum ParseError {
+    #[error("failed to read devcontainer file `{path}`: {source}")]
+    Read {
+        path: PathBuf,
+        source: std::io::Error,
+    },
+
+    #[error("invalid devcontainer JSON in `{path}`: {source}")]
+    Json {
+        path: PathBuf,
+        source: serde_json::Error,
+    },
+
+    #[error("container file `{0}` does not exist or is not a regular file")]
+    ContainerFileNotFound(PathBuf),
+
+    #[error("the devcontainer file path has no parent directory: `{0}`")]
+    InvalidDevContainerPath(PathBuf),
+}
+
+impl TryFrom<(DevContainerSchema, PathBuf)> for DevContainer {
+    type Error = ParseError;
+
+    fn try_from((schema, devcontainer_path): (DevContainerSchema, PathBuf)) -> Result<Self, Self::Error> {
+        let base_dir = devcontainer_path
+            .parent()
+            .ok_or_else(|| ParseError::InvalidDevContainerPath(devcontainer_path.clone()))?;
+
+        let container_file_path = match schema.build.dockerfile.as_deref() {
+            Some(file) => base_dir.join(file),
+            None => first_existing_container_file(base_dir),
+        };
+
+        if !container_file_path.is_file() {
+            return Err(ParseError::ContainerFileNotFound(container_file_path));
+        }
+
+        Ok(Self {
+            container_file_path,
+            name: schema.name,
+            build_args: schema.build.args,
+            container_env: schema.container_env,
+            workspace_folder: schema.workspace_folder,
+            post_create_command: schema.post_create_command,
+            post_start_command: schema.post_start_command,
+        })
+    }
+}
+
+fn first_existing_container_file(base_dir: &Path) -> PathBuf {
+    ["Dockerfile", "Containerfile"]
+        .iter()
+        .map(|filename| base_dir.join(filename))
+        .find(|path| path.is_file())
+        .unwrap_or_else(|| base_dir.join("Dockerfile"))
+}
+
+pub async fn parse(path: impl AsRef<Path>) -> Result<DevContainer, ParseError> {
+    let path = path.as_ref().to_path_buf();
+    let contents = tokio::fs::read_to_string(&path)
+        .await
+        .map_err(|source| ParseError::Read {
+            path: path.clone(),
+            source,
+        })?;
+
+    let schema = serde_json::from_str::<DevContainerSchema>(&contents).map_err(|source| {
+        ParseError::Json {
+            path: path.clone(),
+            source,
+        }
+    })?;
+
+    DevContainer::try_from((schema, path))
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::fs;
+
+    #[test]
+    fn resolves_configured_containerfile_relative_to_devcontainer_file() {
+        let dir = tempfile::tempdir().unwrap();
+        let devcontainer_path = dir.path().join("devcontainer.json");
+        let containerfile_path = dir.path().join("Containerfile");
+        fs::write(&containerfile_path, "FROM alpine\n").unwrap();
+
+        let schema = DevContainerSchema {
+            name: Some("test".into()),
+            build: DevContainerBuildSchema {
+                dockerfile: Some("Containerfile".into()),
+                args: HashMap::new(),
+            },
+            workspace_folder: None,
+            container_env: HashMap::new(),
+            post_create_command: None,
+            post_start_command: None,
+        };
+
+        let config = DevContainer::try_from((schema, devcontainer_path)).unwrap();
+        assert_eq!(config.container_file_path, containerfile_path);
+    }
+
+    #[test]
+    fn falls_back_to_dockerfile_before_containerfile() {
+        let dir = tempfile::tempdir().unwrap();
+        let devcontainer_path = dir.path().join("devcontainer.json");
+        let dockerfile_path = dir.path().join("Dockerfile");
+        fs::write(&dockerfile_path, "FROM alpine\n").unwrap();
+        fs::write(dir.path().join("Containerfile"), "FROM busybox\n").unwrap();
+
+        let schema = DevContainerSchema {
+            name: None,
+            build: DevContainerBuildSchema {
+                dockerfile: None,
+                args: HashMap::new(),
+            },
+            workspace_folder: None,
+            container_env: HashMap::new(),
+            post_create_command: None,
+            post_start_command: None,
+        };
+
+        let config = DevContainer::try_from((schema, devcontainer_path)).unwrap();
+        assert_eq!(config.container_file_path, dockerfile_path);
+    }
+}

crates/herald-server/Cargo.toml

@@ -0,0 +1,30 @@
+[package]
+name = "herald-server"
+version = "1.2.0"
+edition = "2024"
+
+[dependencies]
+reqwest = { workspace = true }
+tokio = { workspace = true }
+tokio-stream = { workspace = true }
+tokio-util = { workspace = true }
+futures-util = { workspace = true }
+serde_json = { workspace = true }
+serde = { workspace = true }
+sentry = { workspace = true }
+sentry-anyhow = { workspace = true }
+openrouter-rs = { workspace = true }
+dotenvy = { workspace = true }
+tower = { workspace = true }
+tower-http = { workspace = true }
+tracing = { workspace = true }
+tracing-subscriber = { workspace = true }
+axum = { workspace = true }
+anyhow = { workspace = true }
+thiserror = { workspace = true }
+ring = { workspace = true }
+hex = { workspace = true }
+bytes = { workspace = true }
+metrics = { workspace = true }
+metrics-exporter-prometheus = { workspace = true }
+devcontainer-rs = { path = "../devcontainer-rs" }