.devcontainer/devcontainer.json

@@ -3,11 +3,10 @@
 	"build": {
 		"dockerfile": "../devcontainer.Dockerfile",
 		"args": {
-			"BUILD_TYPE": "Debug",
-			"COMPILER_CPPSTD": "23"
+			"BUILD_TYPE": "Debug"
 		}
 	},
-	"postCreateCommand": "${containerWorkspaceFolder}/.devcontainer/postcreate.py --build_type=Debug --cppstd=23",
+	"postCreateCommand": "${containerWorkspaceFolder}/.devcontainer/postcreate.py --build_type=Debug",
 	// Configure tool-specific properties.
 	"customizations": {
 		"vscode": {
@@ -15,7 +14,6 @@
 				"conan-extension.installArgs": [
 					"-of build",
 					"-s build_type=Debug"
-					"-s compiler.cppstd=23"
 				],
 			},
 			"extensions": [

.devcontainer/postcreate.py

@@ -4,8 +4,7 @@ import os
 
 parser = argparse.ArgumentParser()
 parser.add_argument('--build_type')
-parser.add_argument('--cppstd')
 args = parser.parse_args()
 
-print ('Executing post-create steps. Build type ', args.build_type, ' C++ standard ', args.cppstd)
-os.system('conan install /workspaces/network-experiment -of /workspaces/network-experiment/build -s compiler.cppstd=' + args.cppstd + ' -s build_type=' + args.build_type)
+print ('Executing post-create steps. Build type ', args.build_type)
+os.system('conan install /workspaces/network-experiment -of /workspaces/build -s build_type=' + args.build_type)

applications/http-mandelbrot/CMakeLists.txt

@@ -11,7 +11,7 @@ add_executable(
 
 set_property(
     TARGET ${PROJECT_NAME}
-    PROPERTY CXX_STANDARD 23
+    PROPERTY CXX_STANDARD 20
 )
 
 target_link_libraries(

applications/text2image/CMakeLists.txt

@@ -10,7 +10,7 @@ add_executable(
 
 set_property(
     TARGET ${PROJECT_NAME}
-    PROPERTY CXX_STANDARD 23
+    PROPERTY CXX_STANDARD 20
 )
 
 target_link_libraries(

bmrshared-freetype/CMakeLists.txt

@@ -12,7 +12,7 @@ add_library(
 
 set_property(
     TARGET ${PROJECT_NAME}
-    PROPERTY CXX_STANDARD 23
+    PROPERTY CXX_STANDARD 20
 )
 
 target_include_directories(

bmrshared-magic/lib/CMakeLists.txt

@@ -9,7 +9,7 @@ add_library(
 
 set_property(
     TARGET ${PROJECT_NAME}
-    PROPERTY CXX_STANDARD 23
+    PROPERTY CXX_STANDARD 20
 )
 
 target_include_directories(

bmrshared-magic/tst/CMakeLists.txt

@@ -11,7 +11,7 @@ add_executable(
 
 set_property(
     TARGET ${PROJECT_NAME}
-    PROPERTY CXX_STANDARD 23
+    PROPERTY CXX_STANDARD 20
 )
 
 target_link_libraries(

bmrshared-web/lib/CMakeLists.txt

@@ -11,7 +11,7 @@ add_library(
 
 set_property(
     TARGET ${PROJECT_NAME}
-    PROPERTY CXX_STANDARD 23
+    PROPERTY CXX_STANDARD 20
 )
 
 target_include_directories(

bmrshared/lib/CMakeLists.txt

@@ -9,7 +9,7 @@ add_library(
 
 set_property(
     TARGET ${PROJECT_NAME}
-    PROPERTY CXX_STANDARD 23
+    PROPERTY CXX_STANDARD 20
 )
 
 target_include_directories(

bmrshared/tst/CMakeLists.txt

@@ -13,7 +13,7 @@ add_executable(
 
 set_property(
     TARGET ${PROJECT_NAME}
-    PROPERTY CXX_STANDARD 23
+    PROPERTY CXX_STANDARD 20
 )
 
 target_link_libraries(

conanfile.py

@@ -8,9 +8,6 @@ class HelloConan(ConanFile):
     requires = "boost/1.89.0", "gtest/1.14.0", "libmagic/5.45", "freetype/2.14.1", "libjpeg/9f"
     generators = "CMakeDeps"
     build_policy = "*"
-    default_options = {
-            "boost/1.89.0:without_cobalt": True
-    }
 
     def generate(self):
         # We need to find the folder of libmagic and supply it to cmake so that

devcontainer.Dockerfile

@@ -1,8 +1,7 @@
 FROM alpine:3.21.3
 
 # Build type used by conan. "Debug" and "Release" are supported.
-ARG BUILD_TYPE
-ARG COMPILER_CPPSTD
+ARG BUILD_TYPE=Debug
 
 RUN mkdir -p /root/.local/bin
 ENV PATH="${PATH}:/root/.local/bin"
@@ -30,17 +29,18 @@ RUN apk add --no-cache \
     python3 \
     pipx && \
     pipx ensurepath
-RUN pipx install conan
-RUN conan profile detect 
+RUN pipx install conan && \
+    conan profile detect
 
 # Pre-build some conan packages we require and take a lot of time to build. This to
 # avoid expensive rebuilding everytime we need a fresh dev container..
 RUN mkdir -p /workspaces/tmp
 WORKDIR /workspaces/tmp
-RUN touch CMakeLists.txt
-ADD conanfile.py .
-RUN conan install -s build_type=$BUILD_TYPE -s compiler.cppstd=$COMPILER_CPPSTD -b=*
-
+RUN conan install -s build_type=${BUILD_TYPE} -b=* --requires=boost/1.89.0
+RUN conan install -s build_type=${BUILD_TYPE} -b=* --requires=libmagic/5.45
+RUN conan install -s build_type=${BUILD_TYPE} -b=* --requires=freetype/2.14.1
+RUN conan install -s build_type=${BUILD_TYPE} -b=missing --requires=gtest/1.14.0
+RUN conan install -s build_type=${BUILD_TYPE} -b=missing --requires=libjpeg/9f
 WORKDIR /workspaces
 RUN rm -rf tmp