Update devcontainer configuration

Set up dev container with ubuntu 24.10, emsdk,
wasi-sdk and clangd

Update emsdk and wasi-sdk to latest versions and
add cmake presets to configure for emscripten and wasi.

Inside the devcontainer the following workflows should
produce correct builds for emscripten and wasi

```bash
cmake --workflow --preset emscripten
cmake --workflow --preset wasi
````

Author: robertoraggi

.devcontainer/Dockerfile

@@ -1,16 +1,25 @@
 FROM ubuntu:24.10
 
+RUN userdel -f -r ubuntu
+
 RUN apt-get update && apt-get install -y \
     bash-completion \
     build-essential \
     clang-format \
     clangd \
     cmake \
+    lldb \
     ninja-build \
+    pipx \
     python3-pip \
     python3-venv \
+    valgrind \
     wget
 
 RUN     wget -nd -P /tmp/ https://github.com/watchexec/watchexec/releases/download/v2.2.0/watchexec-2.2.0-$(uname -m)-unknown-linux-gnu.deb \
     &&  dpkg -i /tmp/watchexec-2.2.0-$(uname -m)-unknown-linux-gnu.deb \
     &&  rm -f /tmp/watchexec-2.2.0-$(uname -m)-unknown-linux-gnu.deb
+
+RUN    wget -nd -P /tmp/ https://github.com/bytecodealliance/wasmtime/releases/download/v25.0.2/wasmtime-v25.0.2-$(uname -m)-linux.tar.xz \
+    && tar -C /usr/local/bin -xvf /tmp/wasmtime-v25.0.2-$(uname -m)-linux.tar.xz --strip-components=1 --wildcards 'wasmtime-*-linux/wasmtime' \
+    && rm -f /tmp/wasmtime-v25.0.2-$(uname -m)-linux.tar.xz

.devcontainer/devcontainer.json

@@ -7,31 +7,40 @@
 
   "runArgs": ["--cap-add=SYS_PTRACE", "--security-opt", "seccomp=unconfined"],
 
-  "hostRequirements": {
-    "cpus": 4
-  },
-
-  "remoteUser": "vscode",
+  "postCreateCommand": "./scripts/devcontainer-post-create.sh",
 
-  "postCreateCommand": "npm ci",
+  "containerUser": "vscode",
 
   "features": {
-    "ghcr.io/devcontainers/features/common-utils": {},
-    "ghcr.io/devcontainers/features/github-cli": "latest",
-    "ghcr.io/devcontainers/features/node": "latest"
+    "ghcr.io/devcontainers/features/common-utils:2": {
+      "configureZshAsDefaultShell": false,
+      "installOhMyZsh": false,
+      "installOhMyZshConfig": false,
+      "installZsh": false,
+      "nonFreePackages": false,
+      "upgradePackages": true,
+      "userUid": "1000",
+      "userGid": "1000"
+    },
+    "ghcr.io/devcontainers/features/github-cli:1": {},
+    "ghcr.io/devcontainers/features/node:1": {
+      "version": "latest"
+    },
+    "./features/emscripten": {},
+    "./features/wasi-sdk": {}
   },
 
   "customizations": {
     "vscode": {
       "extensions": [
         "llvm-vs-code-extensions.vscode-clangd",
-        "llvm-vs-code-extensions.lldb-dap"
+        "llvm-vs-code-extensions.lldb-dap",
+        "twxs.cmake",
+        "ms-vscode.cmake-tools",
+        "esbenp.prettier-vscode"
       ],
       "settings": {
-        "clangd.arguments": [
-          "--compile-commands-dir=build",
-          "--completion-style=bundled"
-        ]
+        "clangd.arguments": ["--completion-style=bundled"]
       }
     }
   }

.devcontainer/emscripten_dev/Dockerfile

@@ -0,0 +1,11 @@
+{
+  "id": "emscripten",
+  "version": "1.0.0",
+  "name": "Emscripten",
+  "dependsOn": {
+    "ghcr.io/devcontainers/features/common-utils": {}
+  },
+  "containerEnv": {
+    "EMSCRIPTEN_ROOT": "/opt/emsdk/upstream/emscripten"
+  }
+}

.devcontainer/emscripten_dev/devcontainer.json

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+set -e
+
+git clone --depth 1 http://github.com/emscripten-core/emsdk.git /opt/emsdk
+cd /opt/emsdk
+./emsdk install latest
+./emsdk activate latest

.devcontainer/features/emscripten/devcontainer-feature.json

@@ -0,0 +1,11 @@
+{
+  "id": "wasi-sdk",
+  "version": "1.0.0",
+  "name": "Wasi SDK",
+  "dependsOn": {
+    "ghcr.io/devcontainers/features/common-utils": {}
+  },
+  "containerEnv": {
+    "WASI_SDK_ROOT": "/opt/wasi-sdk"
+  }
+}

.devcontainer/features/emscripten/install.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+set -e
+
+arch=$(uname -m)
+
+if [ "$arch" == "aarch64" ]; then
+    arch="arm64"
+fi
+
+wget -nd -P /tmp/ https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-24/wasi-sdk-24.0-${arch}-linux.deb
+
+dpkg -i /tmp/wasi-sdk-24.0-${arch}-linux.deb

.devcontainer/features/wasi-sdk/devcontainer-feature.json

@@ -6,3 +6,5 @@ node_modules
 *.tgz
 .vscode/launch.json
 .cache
+.clangd
+*.pch

.devcontainer/features/wasi-sdk/install.sh

@@ -32,6 +32,7 @@ endif()
 include(FetchContent)
 include(GNUInstallDirs)
 include(CMakePackageConfigHelpers)
+include(ExternalProject)
 
 file(READ "${CMAKE_CURRENT_SOURCE_DIR}/package.json" package_json)
 
@@ -59,12 +60,9 @@ FetchContent_Declare(
     GIT_SHALLOW         1
 )
 
-FetchContent_Populate(utfcpp)
+FetchContent_MakeAvailable(utfcpp)
 FetchContent_GetProperties(utfcpp)
 
-add_library(utf8cpp::utf8cpp INTERFACE IMPORTED)
-set_target_properties(utf8cpp::utf8cpp PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${utfcpp_SOURCE_DIR}/source")
-
 FetchContent_Declare(
     wasi_sysroot
     URL https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-22/wasi-sysroot-22.0.tar.gz
@@ -96,7 +94,26 @@ if (CXX_ENABLE_FLATBUFFERS)
     set_target_properties(flatbuffers::header-only PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${flatbuffers_SOURCE_DIR}/include")
 endif()
 
-add_subdirectory(tools/kwgen)
+if (NOT KWGEN_EXECUTABLE AND CMAKE_SYSTEM_NAME STREQUAL "WASI")
+
+    ExternalProject_Add(
+        kwgen_host
+        SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/tools/kwgen
+        INSTALL_COMMAND ""
+    )
+
+    ExternalProject_Get_property(kwgen_host BINARY_DIR)
+
+    add_executable(kwgen IMPORTED)
+    set_target_properties(kwgen PROPERTIES IMPORTED_LOCATION "${BINARY_DIR}/kwgen")
+    add_dependencies(kwgen kwgen_host)
+
+else()
+
+    add_subdirectory(tools/kwgen)
+
+endif()
+
 add_subdirectory(src)
 
 if (CXX_BUILD_TESTS)
@@ -128,3 +145,15 @@ install(FILES
     "${CMAKE_CURRENT_BINARY_DIR}/cxxConfigVersion.cmake"
     DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/cxx
 )
+
+set(CLANGD_CONFIG_FILE "${CMAKE_CURRENT_SOURCE_DIR}/clangd.in")
+
+if (EMSCRIPTEN)
+    set(CLANGD_CONFIG_FILE "${CMAKE_CURRENT_SOURCE_DIR}/clangd_emscripten.in")
+endif()
+
+configure_file(
+    ${CLANGD_CONFIG_FILE}
+    ${CMAKE_CURRENT_SOURCE_DIR}/.clangd
+    @ONLY
+)