Update ubuntu default docker variant to jammy (22.04 LTS). Pump gcc default version to 12. Pump LLVM default version to 15. Update Readme

Author: Jason5480

.devcontainer/Dockerfile

@@ -1,5 +1,5 @@
-# [Choice] bionic (18.04), focal (20.04)
-ARG VARIANT="focal"
+# [Choice] bionic (18.04), focal (20.04), jammy (22.04)
+ARG VARIANT="jammy"
 FROM ubuntu:${VARIANT}
 
 # Restate the variant to use it later on in the llvm and cmake installations
@@ -28,9 +28,9 @@ ENV CONAN_SYSREQUIRES_SUDO 0
 ENV CONAN_SYSREQUIRES_MODE enabled
 
 # User-settable versions:
-# This Dockerfile should support gcc-[7, 8, 9, 10, 11] and clang-[10, 11, 12, 13]
+# This Dockerfile should support gcc-[7, 8, 9, 10, 11, 12] and clang-[10, 11, 12, 13, 14, 15]
 # Earlier versions of clang will require significant modifications to the IWYU section
-ARG GCC_VER="11"
+ARG GCC_VER="12"
 # Add gcc-${GCC_VER}
 RUN add-apt-repository -y ppa:ubuntu-toolchain-r/test && \
     apt-get update -qq && export DEBIAN_FRONTEND=noninteractive && \
@@ -41,7 +41,7 @@ RUN add-apt-repository -y ppa:ubuntu-toolchain-r/test && \
 RUN update-alternatives --install /usr/bin/gcc gcc $(which gcc-${GCC_VER}) 100
 RUN update-alternatives --install /usr/bin/g++ g++ $(which g++-${GCC_VER}) 100
 
-ARG LLVM_VER="13"
+ARG LLVM_VER="15"
 # Add clang-${LLVM_VER}
 ARG LLVM_URL="http://apt.llvm.org/${VARIANT}/"
 ARG LLVM_PKG="llvm-toolchain-${VARIANT}-${LLVM_VER}"
@@ -113,8 +113,4 @@ ENV CXX=${USE_CLANG:+"clang++"}
 ENV CC=${CC:-"gcc"}
 ENV CXX=${CXX:-"g++"}
 
-# Include project
-#ADD . /workspaces/cpp_starter_project
-#WORKDIR /workspaces/cpp_starter_project
-
 CMD ["/bin/bash"]

.devcontainer/devcontainer.json

@@ -4,14 +4,14 @@
 	"name": "C++",
 	"build": {
 		"dockerfile": "Dockerfile",
-		// Update 'VARIANT' to pick an Ubuntu OS version. Options: [bionic, focal]. Default: focal
-		// Update 'GCC_VER' to pick a gcc and g++ version. Options: [7, 8, 9, 10, 11]. Default: 11
-		// Update 'LLVM_VER' to pick clang version. Options: [10, 11, 12, 13]. Default: 13
+		// Update 'VARIANT' to pick an Ubuntu OS version. Options: [bionic, focal, jammy]. Default: jammy
+		// Update 'GCC_VER' to pick a gcc and g++ version. Options: [7, 8, 9, 10, 11, 12]. Default: 12
+		// Update 'LLVM_VER' to pick clang version. Options: [10, 11, 12, 13, 14, 15]. Default: 15
 		// Update 'USE_CLANG' to set clang as the default C and C++ compiler. Options: [1, null]. Default null
 		// "args": {
-		// 	"VARIANT": "focal",
-		// 	"GCC_VER": "11",
-		// 	"LLVM_VER": "13"
+		// 	"VARIANT": "jammy",
+		// 	"GCC_VER": "12",
+		// 	"LLVM_VER": "15"
 		// }
 	},
 	"runArgs": [

README_docker.md

@@ -8,19 +8,19 @@ docker build -f ./.devcontainer/Dockerfile --tag=my_project:latest .
 docker run -it my_project:latest
 ```
 
-This command will put you in a `bash` session in a Ubuntu 20.04 Docker container,
+This command will put you in a `bash` session in a Ubuntu 22.04 Docker container,
 with all of the tools listed in the [Dependencies](#dependencies) section already installed.
-Additionally, you will have `g++-11` and `clang++-13` installed as the default
+Additionally, you will have `g++-12` and `clang++-15` installed as the default
 versions of `g++` and `clang++`.
 
 If you want to build this container using some other versions of gcc and clang,
 you may do so with the `GCC_VER` and `LLVM_VER` arguments:
 
 ```bash
-docker build --tag=myproject:latest --build-arg GCC_VER=10 --build-arg LLVM_VER=11 .
+docker build --tag=myproject:latest --build-arg GCC_VER=11 --build-arg LLVM_VER=14 .
 ```
 
-The CC and CXX environment variables are set to GCC version 11 by default.
+The CC and CXX environment variables are set to GCC by default.
 If you wish to use clang as your default CC and CXX environment variables, you
 may do so like this:
 
@@ -29,7 +29,7 @@ docker build --tag=my_project:latest --build-arg USE_CLANG=1 .
 ```
 
 You will be logged in as root, so you will see the `#` symbol as your prompt.
-You will be in a directory that contains a copy of the `cpp_starter_project`;
+You will be in a directory that contains a copy of the `cmake_conan_boilerplate_template`;
 any changes you make to your local copy will not be updated in the Docker image
 until you rebuild it.
 If you need to mount your local copy directly in the Docker image, see
@@ -45,18 +45,18 @@ docker run -it \
 You can configure and build [as directed above](#build) using these commands:
 
 ```bash
-/starter_project# mkdir build
-/starter_project# cmake -S . -B ./build
-/starter_project# cmake --build ./build
+/cmake_conan_boilerplate_template# mkdir build
+/cmake_conan_boilerplate_template# cmake -S . -B ./build
+/cmake_conan_boilerplate_template# cmake --build ./build
 ```
 
-You can configure and build using `clang-13`, without rebuilding the container,
+You can configure and build using `clang`, without rebuilding the container,
 with these commands:
 
 ```bash
-/starter_project# mkdir build
-/starter_project# CC=clang CXX=clang++ cmake -S . -B ./build
-/starter_project# cmake --build ./build
+/cmake_conan_boilerplate_template# mkdir build
+/cmake_conan_boilerplate_template# CC=clang CXX=clang++ cmake -S . -B ./build
+/cmake_conan_boilerplate_template# cmake --build ./build
 ```
 
 The `ccmake` tool is also installed; you can substitute `ccmake` for `cmake` to