[DO-984] add-zlib-recipe (!4)

Co-authored-by: aleksandr.vodyanov <aleksandr.vodyanov@avroid.tech>
Reviewed-on: https://git.avroid.tech/Conan/conan_build/pulls/4

recipes/zlib/all/conanfile.py

@@ -0,0 +1,114 @@
+from conan import ConanFile
+from conan.tools.cmake import CMake, CMakeToolchain, cmake_layout
+from conan.tools.files import apply_conandata_patches, export_conandata_patches, get, load, replace_in_file, save
+from conan.tools.scm import Version, Git
+import os
+
+required_conan_version = ">=1.53.0"
+
+
+class ZlibConan(ConanFile):
+    name = "zlib"
+    package_type = "library"
+    url = "https://github.com/conan-io/conan-center-index"
+    homepage = "https://zlib.net"
+    license = "Zlib"
+    description = ("A Massively Spiffy Yet Delicately Unobtrusive Compression Library "
+                   "(Also Free, Not to Mention Unencumbered by Patents)")
+    topics = ("zlib", "compression")
+
+    settings = "os", "arch", "compiler", "build_type"
+    options = {
+        "shared": [True, False],
+        "fPIC": [True, False],
+    }
+    default_options = {
+        "shared": False,
+        "fPIC": True,
+    }
+
+    @property
+    def _is_mingw(self):
+        return self.settings.os == "Windows" and self.settings.compiler == "gcc"
+
+    def export_sources(self):
+        export_conandata_patches(self)
+
+    def config_options(self):
+        if self.settings.os == "Windows":
+            del self.options.fPIC
+
+    def configure(self):
+        if self.options.shared:
+            self.options.rm_safe("fPIC")
+        self.settings.rm_safe("compiler.libcxx")
+        self.settings.rm_safe("compiler.cppstd")
+
+    def layout(self):
+        cmake_layout(self, src_folder="src")
+
+    def source(self):
+        #get(self, **self.conan_data["sources"][self.version],
+        #    destination=self.source_folder, strip_root=True)
+        git = Git(self)
+        sources = self.conan_data["sources"][self.version]
+        clone_args = ['--depth', '1', '--branch', sources["branch"]]
+        git.clone(url=sources["url"], target=self.source_folder, args=clone_args)
+
+    def generate(self):
+        tc = CMakeToolchain(self)
+        tc.variables["SKIP_INSTALL_ALL"] = False
+        tc.variables["SKIP_INSTALL_LIBRARIES"] = False
+        tc.variables["SKIP_INSTALL_HEADERS"] = False
+        tc.variables["SKIP_INSTALL_FILES"] = True
+        # Correct for misuse of "${CMAKE_INSTALL_PREFIX}/" in CMakeLists.txt
+        tc.variables["INSTALL_LIB_DIR"] = "lib"
+        tc.variables["INSTALL_INC_DIR"] = "include"
+        tc.variables["ZLIB_BUILD_EXAMPLES"] = False
+        tc.generate()
+
+    def _patch_sources(self):
+        apply_conandata_patches(self)
+
+        is_apple_clang12 = self.settings.compiler == "apple-clang" and Version(self.settings.compiler.version) >= "12.0"
+        if not is_apple_clang12:
+            for filename in ['zconf.h', 'zconf.h.cmakein', 'zconf.h.in']:
+                filepath = os.path.join(self.source_folder, filename)
+                replace_in_file(self, filepath,
+                                      '#ifdef HAVE_UNISTD_H    '
+                                      '/* may be set to #if 1 by ./configure */',
+                                      '#if defined(HAVE_UNISTD_H) && (1-HAVE_UNISTD_H-1 != 0)')
+                replace_in_file(self, filepath,
+                                      '#ifdef HAVE_STDARG_H    '
+                                      '/* may be set to #if 1 by ./configure */',
+                                      '#if defined(HAVE_STDARG_H) && (1-HAVE_STDARG_H-1 != 0)')
+
+    def build(self):
+        self._patch_sources()
+        cmake = CMake(self)
+        cmake.configure()
+        cmake.build()
+
+    def _extract_license(self):
+        tmp = load(self, os.path.join(self.source_folder, "zlib.h"))
+        license_contents = tmp[2:tmp.find("*/", 1)]
+        return license_contents
+
+    def package(self):
+        save(self, os.path.join(self.package_folder, "licenses", "LICENSE"), self._extract_license())
+        cmake = CMake(self)
+        cmake.install()
+
+    def package_info(self):
+        self.cpp_info.set_property("cmake_find_mode", "both")
+        self.cpp_info.set_property("cmake_file_name", "ZLIB")
+        self.cpp_info.set_property("cmake_target_name", "ZLIB::ZLIB")
+        self.cpp_info.set_property("pkg_config_name", "zlib")
+        if self.settings.os == "Windows" and not self._is_mingw:
+            libname = "zdll" if self.options.shared else "zlib"
+        else:
+            libname = "z"
+        self.cpp_info.libs = [libname]
+
+        self.cpp_info.names["cmake_find_package"] = "ZLIB"
+        self.cpp_info.names["cmake_find_package_multi"] = "ZLIB"