fix(ci): add --wrap-mode=forcefallback for subproject resolution

.github/workflows/conan.yml

@@ -62,7 +62,13 @@ jobs:
       - name: Install GCC 15 (Linux)
         if: runner.os == 'Linux'
         run: |
-          sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
+          # Retry PPA setup — Launchpad occasionally returns transient
+          # GPGKeyTemporarilyNotFoundError (HTTP 500) errors.
+          for i in 1 2 3 4 5; do
+            sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test && break
+            echo "Attempt $i failed, retrying in 10s..."
+            sleep 10
+          done
           sudo apt-get update
           sudo apt-get install -y gcc-15 g++-15 ccache
 
@@ -79,7 +85,17 @@ jobs:
 
       - name: Install pkg-config (Windows)
         if: runner.os == 'Windows'
-        run: choco install pkgconfiglite
+        shell: pwsh
+        run: |
+          # Retry choco install — chocolatey community feed occasionally
+          # returns 504 Gateway Timeout errors.
+          foreach ($i in 1..5) {
+            choco install pkgconfiglite -y
+            if ($LASTEXITCODE -eq 0) { break }
+            Write-Host "Attempt $i failed, retrying in 10s..."
+            Start-Sleep -Seconds 10
+          }
+          if ($LASTEXITCODE -ne 0) { exit 1 }
 
       # -- Conan --
       - name: Create conan profile (Unix)
@@ -122,11 +138,26 @@ jobs:
           ccache -z
 
       # -- Build & Test --
+      - name: Write compiler native file (Unix)
+        if: runner.os != 'Windows'
+        shell: bash
+        run: |
+          mkdir -p builddir
+          {
+            echo "[binaries]"
+            echo "c = '${{ matrix.platform.cc }}'"
+            echo "cpp = '${{ matrix.platform.cxx }}'"
+          } > builddir/compiler.ini
+
       - name: Configure
         env:
           CC: ${{ runner.os != 'Windows' && format('ccache {0}', matrix.platform.cc) || matrix.platform.cc }}
           CXX: ${{ runner.os != 'Windows' && format('ccache {0}', matrix.platform.cxx) || matrix.platform.cxx }}
-        run: meson setup builddir/ --native-file builddir/conan/conan_meson_native.ini
+        run: >
+          meson setup builddir/
+          --wrap-mode=forcefallback
+          --native-file builddir/conan/conan_meson_native.ini
+          ${{ runner.os != 'Windows' && '--native-file builddir/compiler.ini' || '' }}
 
       - name: Build
         run: meson compile -C builddir/

.github/workflows/system-packages.yml

@@ -57,7 +57,13 @@ jobs:
       - name: Install packages (Linux)
         if: runner.os == 'Linux'
         run: |
-          sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
+          # Retry PPA setup — Launchpad occasionally returns transient
+          # GPGKeyTemporarilyNotFoundError (HTTP 500) errors.
+          for i in 1 2 3 4 5; do
+            sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test && break
+            echo "Attempt $i failed, retrying in 10s..."
+            sleep 10
+          done
           sudo apt-get update
           sudo apt-get install -y gcc-15 g++-15 ccache
           sudo apt-get install -y libspdlog-dev libfmt-dev catch2 libtbb-dev
@@ -98,6 +104,7 @@ jobs:
         run: >
           meson setup build/
           --buildtype=${{ matrix.build_type }}
+          --wrap-mode=forcefallback
           -Dtesting=true
 
       - name: Build

.gitignore

@@ -54,4 +54,12 @@ build*
 
 # meson wrap likes to add this file
 .meson-subproject-wrap-hash.txt
+
+# Ignore auto-promoted wrap-redirect files from subprojects.
+# Only directly-needed wraps are whitelisted below.
+subprojects/*.wrap
+!subprojects/catch2.wrap
+!subprojects/spdlog.wrap
+!subprojects/zipper.wrap
+
 docs/

conanfile.py

@@ -6,7 +6,6 @@ class AnotherRayTracer(ConanFile):
     requires = [
         "spdlog/1.15.1",
         "catch2/3.8.1",
-        "mdspan/0.6.0",
     ]
     settings = "os", "compiler", "build_type", "arch"
     generators = "PkgConfigDeps"

include/art/utils/AffineTransform.hpp

@@ -1,6 +1,6 @@
 #pragma once
 
-#include <zipper/transform/transform.hpp>
+#include <zipper/transform/all.hpp>
 
 #include "art/zipper_types.hpp"
 

meson.build

@@ -1,6 +1,6 @@
 project('AnotherRayTracer', 'cpp',
   version : '0.1',
-  default_options : ['warning_level=3', 'cpp_std=c++26'])
+  default_options : ['warning_level=3', 'cpp_std=c++26,vc++latest'])
 
 
 
@@ -10,16 +10,12 @@ spdlog_version = '>=1.9.2'
 
 
 cc = meson.get_compiler('cpp')
-dl_lib = cc.find_library('dl')
-
 
 spdlog_dep = dependency('spdlog', version: spdlog_version, default_options: ['tests=disabled'])
 
 zipper_proj = subproject('zipper', default_options: {'testing': false, 'examples': false})
 zipper_dep = zipper_proj.get_variable('zipper_dep')
 
-TBB_dep = dependency('tbb')
-
 required_deps = [zipper_dep]
 internal_deps = [spdlog_dep] + required_deps
 
@@ -60,7 +56,7 @@ art_dep = declare_dependency(
   include_directories: include_dirs)
 
 
-art_exec = executable('art', 'src/main.cpp', dependencies: [art_dep] + internal_deps)
+art_exec = executable('art-cli', 'src/main.cpp', dependencies: [art_dep] + internal_deps)
 
 
 if get_option('testing')

src/Camera.cpp

@@ -1,7 +1,7 @@
 #include "art/Camera.hpp"
 
 #include <iostream>
-#include <zipper/transform/transform.hpp>
+#include <zipper/transform/all.hpp>
 
 #include "art/Ray.hpp"
 #include "art/utils/AffineTransform.hpp"

src/main.cpp

@@ -1,6 +1,6 @@
 #include <iostream>
 
-#include <zipper/transform/transform.hpp>
+#include <zipper/transform/all.hpp>
 
 #include "art/Camera.hpp"
 #include "art/geometry/Box.hpp"