Switch to external cmake feature

Author: AlexDenisov

.devcontainer/Dockerfile

@@ -1,14 +1,5 @@
 FROM mcr.microsoft.com/devcontainers/cpp:1-ubuntu-24.04
 
-ARG REINSTALL_CMAKE_VERSION_FROM_SOURCE="3.29.3"
-
-COPY ./reinstall-cmake.sh /tmp/
-
-RUN if [ "${REINSTALL_CMAKE_VERSION_FROM_SOURCE}" != "none" ]; then \
-    chmod +x /tmp/reinstall-cmake.sh && /tmp/reinstall-cmake.sh ${REINSTALL_CMAKE_VERSION_FROM_SOURCE}; \
-    fi \
-    && rm -f /tmp/reinstall-cmake.sh
-
 RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
     && apt-get -y install --no-install-recommends \
     software-properties-common fish

.devcontainer/devcontainer.json

@@ -3,5 +3,13 @@
   "build": {
     "dockerfile": "Dockerfile"
   },
+  "features": {
+    // Switch to the "official" version as soon as
+    // https://github.com/devcontainers-community/features-cmake/pull/2
+    // merged
+    "ghcr.io/alexdenisov/features/feature-cmake": {
+      "version": "3.29.3"
+    }
+  },
   "postCreateCommand": "sh .devcontainer/post_create.sh"
 }

.devcontainer/reinstall-cmake.sh

@@ -6,11 +6,7 @@ on:
     branches: ["main"]
 jobs:
   build-and-test:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [macos-latest]
+    runs-on: macos-latest
     steps:
       - uses: actions/checkout@v4
         with: