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5e337b4cb3
Standalone crate that reads devcontainer.json (with JSONC support), fetches OCI Features via oras, and produces a resolved config containing a generated Dockerfile, lifecycle hooks, environment variables, and forwarded ports. Supports image, Dockerfile, and Docker Compose modes with devcontainer variable substitution. No coupling to arc-workflows or DaytonaSandbox. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
102 lines
3.6 KiB
Rust
102 lines
3.6 KiB
Rust
use arc_devcontainer::{Command, DevcontainerResolver};
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use std::path::PathBuf;
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fn fixture_path(name: &str) -> PathBuf {
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PathBuf::from(env!("CARGO_MANIFEST_DIR"))
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.join("tests/fixtures")
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.join(name)
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}
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#[tokio::test]
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async fn resolve_image_only() {
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let config = DevcontainerResolver::resolve(&fixture_path("image-only"))
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.await
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.unwrap();
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assert!(config.dockerfile.contains("FROM mcr.microsoft.com/devcontainers/base:ubuntu"));
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assert_eq!(config.remote_user.as_deref(), Some("vscode"));
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assert_eq!(config.forwarded_ports, vec![3000, 8080]);
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assert_eq!(config.environment.get("EDITOR").map(String::as_str), Some("code"));
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assert_eq!(config.workspace_folder, "/workspaces/image-only");
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assert!(config.compose_file.is_none());
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assert!(config.compose_service.is_none());
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assert_eq!(config.post_create_commands.len(), 1);
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assert!(matches!(&config.post_create_commands[0], Command::Shell(s) if s == "echo hello"));
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}
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#[tokio::test]
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async fn resolve_dockerfile_mode() {
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let config = DevcontainerResolver::resolve(&fixture_path("dockerfile-mode"))
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.await
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.unwrap();
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// Should read the actual Dockerfile content
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assert!(config.dockerfile.contains("FROM node:20"));
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assert!(config.dockerfile.contains("apt-get update"));
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assert_eq!(config.remote_user.as_deref(), Some("developer"));
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assert_eq!(config.forwarded_ports, vec![4000]);
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assert_eq!(config.post_create_commands.len(), 1);
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assert!(matches!(&config.post_create_commands[0], Command::Shell(s) if s == "npm install"));
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}
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#[tokio::test]
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async fn resolve_compose_mode() {
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let config = DevcontainerResolver::resolve(&fixture_path("compose-mode"))
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.await
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.unwrap();
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// In compose mode, the dockerfile is derived from the compose service's image
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assert!(config.dockerfile.contains("FROM node:20"));
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assert_eq!(config.workspace_folder, "/workspace");
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assert_eq!(config.remote_user.as_deref(), Some("node"));
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assert!(config.compose_file.is_some());
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assert_eq!(config.compose_service.as_deref(), Some("app"));
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// Ports come from compose + remoteEnv merged
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assert_eq!(config.forwarded_ports, vec![3000, 9229]);
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// Environment merged from compose + remoteEnv
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assert_eq!(config.environment.get("NODE_ENV").map(String::as_str), Some("development"));
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assert_eq!(config.environment.get("DEBUG").map(String::as_str), Some("true"));
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}
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#[tokio::test]
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async fn resolve_variables() {
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let config = DevcontainerResolver::resolve(&fixture_path("variables"))
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.await
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.unwrap();
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assert_eq!(config.workspace_folder, "/workspaces/variables");
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assert_eq!(
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config.environment.get("PROJECT_ROOT").map(String::as_str),
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Some("/workspaces/variables")
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);
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assert_eq!(
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config.environment.get("PROJECT_NAME").map(String::as_str),
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Some("variables")
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);
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}
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#[tokio::test]
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async fn resolve_not_found() {
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let result = DevcontainerResolver::resolve(&fixture_path("nonexistent")).await;
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assert!(result.is_err());
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let err = result.unwrap_err();
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assert!(err.to_string().contains("no devcontainer.json found"));
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}
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#[tokio::test]
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async fn generated_dockerfile_is_well_formed() {
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let config = DevcontainerResolver::resolve(&fixture_path("image-only"))
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.await
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.unwrap();
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// Should start with the generated header
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assert!(config.dockerfile.contains("# Generated by arc-devcontainer"));
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// Should have the base image
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assert!(config.dockerfile.contains("FROM"));
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// Should end with a newline
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assert!(config.dockerfile.ends_with('\n'));
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}
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