zopfli: add package (#2609)

packages/z/zopfli/xmake.lua

@@ -0,0 +1,20 @@
+package("zopfli")
+    set_homepage("https://github.com/google/zopfli")
+    set_description("Zopfli Compression Algorithm is a compression library programmed in C to perform very good, but slow, deflate or zlib compression.")
+    set_license("Apache-2.0")
+
+    add_urls("https://github.com/google/zopfli.git")
+    add_versions("2021.06.14", "831773bc28e318b91a3255fa12c9fcde1606058b")
+
+    add_deps("cmake")
+
+    on_install(function (package)
+        local configs = {"-DZOPFLI_BUILD_INSTALL=ON"}
+        table.insert(configs, "-DCMAKE_BUILD_TYPE=" .. (package:is_debug() and "Debug" or "Release"))
+        table.insert(configs, "-DBUILD_SHARED_LIBS=" .. (package:config("shared") and "ON" or "OFF"))
+        import("package.tools.cmake").install(package, configs)
+    end)
+
+    on_test(function (package)
+        assert(package:has_cfuncs("ZopfliCompress", {includes = "zopfli.h"}))
+    end)