feat(devcontainer): add Alpine dev container configuration (#1217)

Author: ganeshnj

.devcontainer/alpine/devcontainer.json

@@ -0,0 +1,31 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/rust
+{
+    "name": "Rust (Alpine)",
+    // Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+    "image": "mcr.microsoft.com/devcontainers/base:alpine", // more images at  // more images at https://hub.docker.com/r/microsoft/devcontainers-base
+
+    // Allow access to host machine
+    "runArgs": ["--network=host"],
+
+    // Use 'mounts' to make the cargo cache persistent in a Docker Volume.
+    "mounts": [
+        {
+            "source": "devcontainer-cargo-cache-alpine-${devcontainerId}",
+            "target": "/usr/local/cargo",
+            "type": "volume"
+        }
+    ],
+
+    "onCreateCommand": "sudo apk add --no-cache build-base rust cargo cargo-zsh-completion rust-src rustfmt cbindgen patchelf cmake",
+
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "rust-lang.rust-analyzer",
+                "vadimcn.vscode-lldb",
+                "tamasfe.even-better-toml"
+            ]
+        }
+    }
+}

.devcontainer/devcontainer.json renamed to .devcontainer/ubuntu/devcontainer.json

@@ -1,9 +1,9 @@
 // For format details, see https://aka.ms/devcontainer.json. For config options, see the
 // README at: https://github.com/devcontainers/templates/tree/main/src/rust
 {
-    "name": "Rust",
+    "name": "Rust (Ubuntu)",
     // Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
-    "image": "mcr.microsoft.com/devcontainers/base:ubuntu",
+    "image": "mcr.microsoft.com/devcontainers/base:ubuntu", // more images at https://hub.docker.com/r/microsoft/devcontainers-base
 
     // Allow access to host machine
     "runArgs": ["--network=host"],
@@ -25,14 +25,15 @@
     },
 
     // Use 'postCreateCommand' to run commands after the container is created.
-    "postCreateCommand": "cargo install cbindgen",
+    "postCreateCommand": "sudo apt-get update && sudo apt-get install -y patchelf && cargo install cbindgen",
 
     // Configure tool-specific properties.
     "customizations": {
         "vscode": {
             "extensions": [
                 "rust-lang.rust-analyzer",
-                "vadimcn.vscode-lldb"
+                "vadimcn.vscode-lldb",
+                "tamasfe.even-better-toml"
             ]
         }
     }

README.md

@@ -64,16 +64,27 @@ cargo install --locked 'cargo-nextest@0.9.96'
 
 #### Dev Containers
 
+Dev Containers allow you to use a Docker container as a full-featured development environment with VS Code.
+
 ##### Prerequisites
 
 - Install the [Dev Containers Extension](https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-containers) in VS Code.
+- Docker must be installed and running on your host machine.
+
+##### Available Containers
+
+We provide two Dev Container configurations:
+- **Ubuntu**: Full-featured development environment with all dependencies installed
+- **Alpine**: Lightweight alternative with minimal dependencies
 
 ##### Steps
 
 1. Open a local VS Code window on the cloned repository.
 2. Open the command palette (`Ctrl+Shift+P` or `Cmd+Shift+P` on macOS) and select **"Dev Containers: Reopen in Container"**.
-3. Choose the **Rust Container**.
-4. VS Code will open a new window connected to the selected container.
+3. Choose either **Ubuntu** or **Alpine** configuration when prompted.
+4. VS Code will build and connect to the selected container environment.
+
+The container includes all necessary dependencies for building and testing `libdatadog`.
 
 #### Docker container
 A dockerfile is provided to run tests in a Ubuntu linux environment. This is particularly useful for running and debugging linux-only tests on macOS.