chore: switch to Noble (24.04) packages for apt.llvm.org (#460)

* chore: switch to Noble (24.04) packages for apt.llvm.org

* chore: actually download llvm/clang from apt.llvm.org

.devcontainer/cpp/Dockerfile

@@ -40,9 +40,9 @@ COPY .devcontainer/cpp/apt-requirements-clang.json /tmp/apt-requirements-clang.j
 # hadolint ignore=SC1091
 RUN wget -qO - https://apt.llvm.org/llvm-snapshot.gpg.key | gpg --dearmor -o /usr/share/keyrings/llvm-snapshot-keyring.gpg \
  && UBUNTU_CODENAME=$(. /etc/os-release; echo "${UBUNTU_CODENAME/*, /}") \
- # && echo "deb [signed-by=/usr/share/keyrings/llvm-snapshot-keyring.gpg] http://apt.llvm.org/${UBUNTU_CODENAME}/ llvm-toolchain-${UBUNTU_CODENAME}-${CLANG_VERSION} main" | tee /etc/apt/sources.list.d/llvm.list > /dev/null \
- # Temporarily hardcode the Ubuntu version to 23.10 (mantic) as there is no support for 24.04 (noble) yet on apt.llvm.org
- && echo "deb [signed-by=/usr/share/keyrings/llvm-snapshot-keyring.gpg] http://apt.llvm.org/mantic/ llvm-toolchain-mantic-${CLANG_VERSION} main" | tee /etc/apt/sources.list.d/llvm.list > /dev/null \ && apt-get update \
+ && echo "deb [signed-by=/usr/share/keyrings/llvm-snapshot-keyring.gpg] http://apt.llvm.org/${UBUNTU_CODENAME}/ llvm-toolchain-${UBUNTU_CODENAME}-${CLANG_VERSION} main" | tee /etc/apt/sources.list.d/llvm.list > /dev/null \
+ && echo -e 'Package: *\nPin: origin "apt.llvm.org"\nPin-Priority: 1000' > /etc/apt/preferences \
+ && apt-get update \
  && jq -r 'to_entries | .[] | .key + "=" + .value' /tmp/apt-requirements-clang.json | xargs apt-get install -y --no-install-recommends \
  && rm /tmp/apt-requirements* \
  && rm -rf /var/lib/apt/lists/*

.devcontainer/cpp/apt-requirements-clang.json

@@ -1,10 +1,10 @@
 {
-  "clang-17": "1:17.0.6-9ubuntu1",
-  "clangd-17": "1:17.0.6-9ubuntu1",
-  "clang-format-17": "1:17.0.6-9ubuntu1",
-  "clang-tidy-17": "1:17.0.6-9ubuntu1",
-  "clang-tools-17": "1:17.0.6-9ubuntu1",
-  "libclang-rt-17-dev": "1:17.0.6-9ubuntu1",
-  "lld-17": "1:17.0.6-9ubuntu1",
-  "llvm-17": "1:17.0.6-9ubuntu1"
+  "clang-17": "1:17.0.6~++20240501091250+6009708b4367-1~exp1~20240501211359.8",
+  "clangd-17": "1:17.0.6~++20240501091250+6009708b4367-1~exp1~20240501211359.8",
+  "clang-format-17": "1:17.0.6~++20240501091250+6009708b4367-1~exp1~20240501211359.8",
+  "clang-tidy-17": "1:17.0.6~++20240501091250+6009708b4367-1~exp1~20240501211359.8",
+  "clang-tools-17": "1:17.0.6~++20240501091250+6009708b4367-1~exp1~20240501211359.8",
+  "libclang-rt-17-dev": "1:17.0.6~++20240501091250+6009708b4367-1~exp1~20240501211359.8",
+  "lld-17": "1:17.0.6~++20240501091250+6009708b4367-1~exp1~20240501211359.8",
+  "llvm-17": "1:17.0.6~++20240501091250+6009708b4367-1~exp1~20240501211359.8"
 }