Add devcontainer configuration

Author: soberpeach

.devcontainer/Dockerfile

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+# Use a Ruby image >= 3.1, as required by some dependencies like recent nokogiri
+FROM ruby:3.2-slim-bookworm
+
+# Prevent interactive prompts from apt
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Install system dependencies required for building gems with native extensions
+# and for general development.
+# - build-essential: For compiling native extensions
+# - git: For cloning repos if needed, although VS Code handles the main clone
+# - curl, wget: Useful general tools
+# - libxml2-dev, libxslt1-dev: Needed by nokogiri gem
+# - zlib1g-dev: Needed by many gems
+# - sqlite3, libsqlite3-dev: Needed by some gems that might be transitively included
+# - libssl-dev: Needed for secure connections, potentially by some gems
+# - pkg-config: Build helper
+# - make: Used by the Makefile in the repo
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    git \
+    curl \
+    wget \
+    libxml2-dev \
+    libxslt1-dev \
+    zlib1g-dev \
+    sqlite3 \
+    libsqlite3-dev \
+    libssl-dev \
+    pkg-config \
+    make \
+    zsh \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+
+# (Optional but Recommended) Create a non-root user for development
+# This matches the default user setup by Dev Containers 'automatic' creation
+ARG USERNAME=vscode
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+RUN groupadd --gid $USER_GID $USERNAME \
+    && useradd --uid $USER_UID --gid $USER_GID -m $USERNAME \
+    # Add the new user to the sudo group to allow them to run commands with sudo
+    && apt-get update \
+    && apt-get install -y sudo \
+    && echo $USERNAME ALL=\(ALL\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME \
+    && chmod 0440 /etc/sudoers.d/$USERNAME \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set Zsh as the default shell for the non-root user
+# Needs to be run as root, after the user is created and zsh is installed
+RUN chsh -s $(which zsh) ${USERNAME}
+
+# Set the default working directory for subsequent commands and where the project code will be mounted
+WORKDIR /workspaces
+
+# Switch to the non-root user
+USER $USERNAME
+
+# The project code will be mounted into /workspaces by Dev Containers.
+# Dependencies will be installed via postCreateCommand in devcontainer.json

.devcontainer/devcontainer.json

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+// .devcontainer/devcontainer.json
+{
+  "name": "Fluent Plugin Datadog Dev", // A friendly name
+  // Specify the path to the custom Dockerfile
+  "build": {
+    "dockerfile": "Dockerfile"
+  },
+  // Use the non-root user created in the Dockerfile
+  "remoteUser": "vscode",
+  // Set the workspace folder inside the container
+  "workspaceFolder": "/workspaces/fluent-plugin-datadog",
+  // Command to run after the container is created and the workspace is mounted.
+  // This installs the gem dependencies using Bundler.
+  "postCreateCommand": "bundle install && sh -c \"$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)\"",
+  // Forward ports that might be useful (e.g., for testing Fluentd)
+  // Fluentd's default forward port is 24224. The repo's docker-compose also uses this.
+  "forwardPorts": [
+    24224
+  ],
+  // Configuration specific to VS Code
+  "customizations": {
+    "vscode": {
+      "settings": {
+        // Optional: Configure Ruby environment settings if needed
+        "ruby.useBundler": true,
+        "ruby.lint": {
+          "rubocop": true
+        },
+        "ruby.format": "rubocop",
+        // Add other Ruby or general settings here
+        // Configure VS Code's integrated terminal to use Zsh
+        "terminal.integrated.defaultProfile.linux": "zsh (2)",
+        "terminal.integrated.profiles.linux": {
+          "zsh (2)": {
+            "path": "zsh"
+          }
+        }
+      },
+      // Specify VS Code extensions to install automatically
+      "extensions": [
+        "rebornix.ruby", // Official Ruby extension
+        "bungcip.better-toml", // For TOML config files
+        "kaiinui.vscode-ruby-test-explorer", // If you want a test explorer UI
+        "dbaeumer.vscode-eslint", // If there are JS parts or linting
+        "redhat.vscode-yaml", // For YAML files (like the docker-compose)
+        "ms-azuretools.vscode-docker" // Useful for working with Docker inside VS Code
+        // Add any other extensions relevant to your workflow
+      ]
+    }
+  }
+  // Uncomment to connect as root instead of the remoteUser.
+  // "remoteUser": "root"
+}

.vscode/launch.json

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+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Run Fluentd with Datadog Plugin",
+            "type": "node",
+            "request": "launch",
+            "program": "${workspaceFolder}/bin/fluentd",
+            "args": [
+                "-c",
+                "${workspaceFolder}/test/fluentd.conf",
+                "-p",
+                "${workspaceFolder}/lib/fluent/plugin"
+            ],
+            "env": {
+                "FLUENTD_DISABLE_BUNDLER_INJECTION": "1"
+            }
+        },
+        {
+            "name": "Run Tests",
+            "type": "node",
+            "request": "launch",
+            "program": "${workspaceFolder}/bin/rake",
+            "args": ["test"]
+        }
+    ]
+} 

.vscode/tasks.json

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+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "Install Dependencies",
+            "type": "shell",
+            "command": "bundle install",
+            "group": "build",
+            "presentation": {
+                "reveal": "always",
+                "panel": "new"
+            },
+            "problemMatcher": []
+        },
+        {
+            "label": "Build Gem",
+            "type": "shell",
+            "command": "gem build fluent-plugin-datadog.gemspec",
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "presentation": {
+                "reveal": "always",
+                "panel": "new"
+            },
+            "problemMatcher": [],
+            "dependsOn": ["Install Dependencies"]
+        },
+        {
+            "label": "Run Tests",
+            "type": "shell",
+            "command": "bundle exec rake test",
+            "group": "test",
+            "presentation": {
+                "reveal": "always",
+                "panel": "new"
+            },
+            "problemMatcher": []
+        },
+        {
+            "label": "Build and Test",
+            "dependsOn": [
+                "Install Dependencies",
+                "Build Gem",
+                "Run Tests"
+            ],
+            "group": {
+                "kind": "build",
+                "isDefault": false
+            }
+        }
+    ]
+}