conan: updated gitlab to use conan2

.gitlab-ci.yml

@@ -2,35 +2,6 @@ stages:
   - build
   - deploy
 
-bionic-build:
-  stage: build
-  image: pllee4/ubuntu-ci:18.04
-  variables:
-    GIT_SUBMODULE_STRATEGY: recursive
-  before_script:
-    - apt-get install -y libeigen3-dev
-  script:
-    - mkdir build && cd build
-    - cmake .. 
-    - cmake --build .
-
-bionic-staging:
-  stage: deploy
-  only:    
-    - master
-  image: pllee4/ubuntu-ci:18.04
-  variables:
-    GIT_SUBMODULE_STRATEGY: recursive
-  before_script:
-    - apt-get install -y libeigen3-dev
-    - conan remote add gitlab https://gitlab.com/api/v4/packages/conan
-  script:
-    # build conan package
-    - conan create . pinloon+public+algorithm/devel
-    - CONAN_LOGIN_USERNAME=ci_user CONAN_PASSWORD=${CI_JOB_TOKEN} conan upload algorithm/0.3.1@pinloon+public+algorithm/devel --all --remote=gitlab
-  dependencies:
-    - bionic-build
-
 focal-build:
   stage: build
   image: pllee4/ubuntu-ci:20.04
@@ -52,10 +23,12 @@ focal-staging:
     GIT_SUBMODULE_STRATEGY: recursive
   before_script:
     - apt-get install -y libeigen3-dev
-    - conan remote add gitlab https://gitlab.com/api/v4/packages/conan
+    # Conan 2 only works with the project-level registry, not the instance-level one
+    - conan remote add gitlab ${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/packages/conan
   script:
     # build conan package
-    - conan create . pinloon+public+algorithm/devel
-    - CONAN_LOGIN_USERNAME=ci_user CONAN_PASSWORD=${CI_JOB_TOKEN} conan upload algorithm/0.3.1@pinloon+public+algorithm/devel --all --remote=gitlab
+    - conan profile detect
+    - conan create . --user=pinloon+public+algorithm --channel=devel --build=missing
+    - CONAN_LOGIN_USERNAME=ci_user CONAN_PASSWORD=${CI_JOB_TOKEN} conan upload "algorithm/*@pinloon+public+algorithm/devel" --remote=gitlab -c
   dependencies:
     - focal-build

conanfile.py

@@ -1,5 +1,7 @@
 from conan import ConanFile
 from conan.tools.cmake import CMakeToolchain, CMakeDeps, CMake, cmake_layout
+from conan.tools.files import collect_libs
+
 
 class AlgorithmConan(ConanFile):
     name = "algorithm"
@@ -8,22 +10,50 @@ class AlgorithmConan(ConanFile):
     author = "Pin Loon Lee"
     url = "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/pllee4/algorithm"
     description = "Algorithm"
+    # CMakeLists.txt hardcodes STATIC, so there is no shared variant to offer
+    package_type = "static-library"
+
+    # Binary configuration
     settings = "os", "compiler", "build_type", "arch"
-    options = {"shared": [True, False]}
-    default_options = {"shared": False}
-    generators = "CMakeToolchain", "CMakeDeps"
-    exports_sources = "*"
+    options = {"fPIC": [True, False]}
+    default_options = {"fPIC": True}
+
+    # Sources are located in the same place as this recipe, copy them to the recipe
+    # cmake/ holds algorithmConfig.cmake.in, third_party/ only satisfies the googletest check
+    exports_sources = "CMakeLists.txt", "cmake/*", "src/*", "include/*", "third_party/*"
+
+    def config_options(self):
+        if self.settings.os == "Windows":
+            self.options.rm_safe("fPIC")
+
+    def requirements(self):
+        # Public headers include <Eigen/Core>, and algorithmConfig.cmake calls find_package(Eigen3)
+        self.requires("eigen/3.4.0", transitive_headers=True)
 
     def layout(self):
-        self.cpp.package.includedirs = ["include"]
-        self.cpp.package.libs = ["algorithm"]
+        cmake_layout(self)
 
-    def build(self, variables=["-DALGO_PACK=true"]):
+    def generate(self):
+        deps = CMakeDeps(self)
+        deps.generate()
+        tc = CMakeToolchain(self)
+        # Skip tests and coverage flags when packaging
+        tc.cache_variables["ALGO_PACK"] = True
+        tc.generate()
+
+    def build(self):
         cmake = CMake(self)
         cmake.configure()
         cmake.build()
-        
+
     def package(self):
         cmake = CMake(self)
-        cmake.configure()
-        cmake.install()
+        cmake.install()
+
+    def package_info(self):
+        # CMakeDeps writes algorithm-config.cmake into the consumer's install folder,
+        # so a consumer only needs that folder on CMAKE_PREFIX_PATH
+        self.cpp_info.set_property("cmake_file_name", "algorithm")
+        self.cpp_info.set_property("cmake_target_name", "pllee4::algorithm")
+        # Picks up whatever archives CMake installed, instead of hardcoding them
+        self.cpp_info.libs = collect_libs(self)