Add vscode and devcontainer support

.devcontainer/Dockerfile

@@ -0,0 +1,12 @@
+# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.209.6/containers/cpp/.devcontainer/base.Dockerfile
+
+# [Choice] Debian / Ubuntu version (use Debian 11/9, Ubuntu 18.04/21.04 on local arm64/Apple Silicon): debian-11, debian-10, debian-9, ubuntu-21.04, ubuntu-20.04, ubuntu-18.04
+ARG VARIANT="bullseye"
+FROM mcr.microsoft.com/vscode/devcontainers/cpp:0-${VARIANT}
+
+# [Optional] Uncomment this section to install additional packages.
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends autoconf automake libtool \
+    && apt-get -y install --no-install-recommends python3 python3-pip \
+    && python3 -m pip install scan-build
+RUN 

.devcontainer/devcontainer.json

@@ -0,0 +1,37 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the README at:
+// https://github.com/microsoft/vscode-dev-containers/tree/v0.209.6/containers/cpp
+{
+	"name": "C++",
+	"build": {
+		"dockerfile": "Dockerfile",
+		// Update 'VARIANT' to pick an Debian / Ubuntu OS version: debian-11, debian-10, debian-9, ubuntu-21.04, ubuntu-20.04, ubuntu-18.04
+		// Use Debian 11, Debian 9, Ubuntu 18.04 or Ubuntu 21.04 on local arm64/Apple Silicon
+		"args": { "VARIANT": "ubuntu-21.04" }
+	},
+	"runArgs": ["--cap-add=SYS_PTRACE", "--security-opt", "seccomp=unconfined"],
+
+	// Set *default* container specific settings.json values on container create.
+	"settings": {},
+
+	// Add the IDs of extensions you want installed when the container is created.
+	"extensions": [
+		"ms-vscode.cpptools",
+		"ms-vscode.cpptools-extension-pack",
+		"ms-vscode.cpptools-themes",
+		"GitHub.vscode-pull-request-github"
+	],
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "gcc -v",
+
+	// Comment out connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+	"remoteUser": "vscode",
+	"features": {
+		"git": "os-provided",
+		"git-lfs": "latest",
+		"github-cli": "latest"
+	}
+}

.vscode/launch.json

@@ -5,17 +5,25 @@
     "version": "0.2.0",
     "configurations": [
         {
-            "name": "(lldb) Launch",
+            "name": "gcc - Build and debug main binary",
             "type": "cppdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/build/htmlcxx",
+            "program": "${workspaceFolder}/build/src/cmph",
             "args": [],
             "stopAtEntry": false,
-            "cwd": "${fileDirname}",
+            "cwd": "${workspaceFolder}",
             "environment": [],
             "externalConsole": false,
-            "MIMode": "lldb"
+            "MIMode": "gdb",
+            "setupCommands": [
+                {
+                    "description": "Enable pretty-printing for gdb",
+                    "text": "-enable-pretty-printing",
+                    "ignoreFailures": true
+                }
+            ],
+            "preLaunchTask": "make",
+            "miDebuggerPath": "/usr/bin/gdb"
         }
     ]
-}
-
+}

.vscode/tasks.json

@@ -73,5 +73,28 @@
             ],
             "group": "build"
         },
+        {
+            "type": "cppbuild",
+            "label": "C/C++: gcc build active file",
+            "command": "/usr/bin/gcc",
+            "args": [
+                "-fdiagnostics-color=always",
+                "-g",
+                "${file}",
+                "-o",
+                "${fileDirname}/${fileBasenameNoExtension}"
+            ],
+            "options": {
+                "cwd": "${fileDirname}"
+            },
+            "problemMatcher": [
+                "$gcc"
+            ],
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "detail": "Task generated by Debugger."
+        }
     ]
 }