Fix CI build problems: conan_version, expat, compiler

- Bump expat to 2.7.1 because old version doesn't build on MacOS anymore
- Bump conan version to 2.20.1 to support latest dependencies (e.g.
  expat), except where it doesn't work, e.g. CentOS 7. This also fixes
  the MacOS build which is now up to compiler version 17, and the old
  conan would reject that.
- Add support for `uvx conan` for python uv users

Also note: I had to remove the very old `import` and `IMPORT` git tags recently
because they cause trouble with git on Windows (case-insensitive
filesystem I think). Not included in this commit, but needed to fix
the CI build.

Signed-off-by: Gary Oberbrunner <[email protected]>

Author: garyo

.github/workflows/build.yml

@@ -41,7 +41,8 @@ jobs:
             need_node20_vol: true
             has_cmake_presets: false
             buildtype: Release
-            conan_version: 2.1.0
+            # use old conan version for CentOS 7
+            conan_version: 2.10.3
             cxx-standard: 17
             cxx-compiler: clang++
             cc-compiler: clang
@@ -58,7 +59,8 @@ jobs:
             need_node20_vol: true
             has_cmake_presets: false
             buildtype: Release
-            conan_version: 2.1.0
+            # use old conan version for CentOS 7
+            conan_version: 2.10.3
             cxx-standard: 17
             cxx-compiler: clang++
             cc-compiler: clang
@@ -74,7 +76,7 @@ jobs:
             vfx-cy: 2023
             has_cmake_presets: false
             buildtype: Release
-            conan_version: 2.1.0
+            conan_version: 2.20.1
             cxx-standard: 17
             cxx-compiler: clang++
             cc-compiler: clang
@@ -90,7 +92,7 @@ jobs:
             vfx-cy: 2023
             has_cmake_presets: false
             buildtype: Release
-            conan_version: 2.1.0
+            conan_version: 2.20.1
             cxx-standard: 17
             cxx-compiler: clang++
             cc-compiler: clang
@@ -103,7 +105,7 @@ jobs:
             os: ubuntu-latest
             has_cmake_presets: true
             buildtype: Release
-            conan_version: 2.1.0
+            conan_version: 2.20.1
             cxx-standard: 17
             cxx-compiler: clang++
             cc-compiler: clang
@@ -116,7 +118,7 @@ jobs:
             os: macos-latest
             has_cmake_presets: true
             buildtype: Release
-            conan_version: 2.1.0
+            conan_version: 2.20.1
             cxx-standard: 17
             cxx-compiler: clang++
             cc-compiler: clang
@@ -129,7 +131,7 @@ jobs:
             os: windows-latest
             has_cmake_presets: true
             buildtype: Release
-            conan_version: 2.1.0
+            conan_version: 2.20.1
             cxx-standard: 17
             cxx-compiler: clang++
             cc-compiler: clang
@@ -142,7 +144,7 @@ jobs:
             os: windows-latest
             has_cmake_presets: true
             buildtype: Release
-            conan_version: 2.0.16
+            conan_version: 2.20.1
             cxx-standard: 17
             cxx-compiler: clang++
             cc-compiler: clang

conanfile.py

@@ -39,7 +39,7 @@ def requirements(self):
 			self.requires("opencl-icd-loader/2023.12.14")
 			self.requires("opencl-headers/2023.12.14")
 		self.requires("opengl/system") # for OpenGL examples
-		self.requires("expat/2.4.8") # for HostSupport
+		self.requires("expat/2.7.1") # for HostSupport
 		self.requires("cimg/3.3.2") # to draw text into images
 		self.requires("spdlog/1.13.0") # for logging
 

scripts/build-cmake.sh

@@ -55,7 +55,17 @@ ARGS="$@"
 
 echo "Building OpenFX $BUILDTYPE in build/ with ${GENERATOR:-conan platform default generator}, $ARGS"
 
-CONAN_VERSION=$(conan -v | sed -e 's/Conan version //g')
+# Set CONAN command based on availability
+if command -v conan >/dev/null 2>&1; then
+    CONAN="conan"
+elif command -v uvx >/dev/null 2>&1; then
+    CONAN="uvx conan"
+else
+    echo "Error: Neither 'conan' nor 'uvx' found. Please install Conan or uv." >&2
+    exit 1
+fi
+
+CONAN_VERSION=$($CONAN -v | sed -e 's/Conan version //g')
 CONAN_MAJOR_VERSION=${CONAN_VERSION:0:1}
 
 PRESET_NAME=
@@ -115,7 +125,7 @@ fi
 # Install dependencies, set up build dir, and generate build files.
 echo === Running conan to install dependencies
 [[ $USE_OPENCL ]] && conan_opts="$conan_opts -o use_opencl=True"
-conan install ${GENERATOR_OPTION} -s build_type=$BUILDTYPE -pr:b=default --build=missing . $conan_opts
+$CONAN install ${GENERATOR_OPTION} -s build_type=$BUILDTYPE -pr:b=default --build=missing . $conan_opts
 
 echo === Running cmake
 # Generate the build files