dev-cpp/cpp-httplib: fix dependency on zstd for users of library

Closes: https://bugs.gentoo.org/953066
Signed-off-by: Alexey Sokolov <alexey+gentoo@asokolov.org>
Part-of: https://github.com/gentoo/gentoo/pull/41458
Signed-off-by: Sam James <sam@gentoo.org>

2 files changed, 138 insertions, 0 deletions

diff --git a/dev-cpp/cpp-httplib/cpp-httplib-0.20.0-r1.ebuild b/dev-cpp/cpp-httplib/cpp-httplib-0.20.0-r1.ebuild
new file mode 100644
index 000000000000..95a963ba30a2
--- /dev/null
+++ b/dev-cpp/cpp-httplib/cpp-httplib-0.20.0-r1.ebuild
@@ -0,0 +1,106 @@
+# Copyright 2022-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{11..13} )
+
+inherit cmake-multilib python-any-r1 toolchain-funcs
+
+DESCRIPTION="C++ HTTP/HTTPS server and client library"
+HOMEPAGE="https://github.com/yhirose/cpp-httplib/"
+
+if [[ "${PV}" == *9999* ]] ; then
+	inherit git-r3
+
+	EGIT_REPO_URI="https://github.com/yhirose/${PN}.git"
+else
+	SRC_URI="https://github.com/yhirose/${PN}/archive/v${PV}.tar.gz
+		-> ${P}.tar.gz"
+
+	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
+fi
+
+LICENSE="MIT"
+SLOT="0/0.20"  # soversion / /usr/include/httplib.h: CPPHTTPLIB_VERSION
+
+IUSE="brotli ssl test zlib zstd"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	brotli? (
+		app-arch/brotli:=[${MULTILIB_USEDEP}]
+	)
+	ssl? (
+		>=dev-libs/openssl-3.0.13:=[${MULTILIB_USEDEP}]
+	)
+	zlib? (
+		sys-libs/zlib[${MULTILIB_USEDEP}]
+	)
+	zstd? (
+		app-arch/zstd[${MULTILIB_USEDEP}]
+	)
+"
+DEPEND="
+	${RDEPEND}
+"
+BDEPEND="
+	${PYTHON_DEPS}
+	virtual/pkgconfig
+"
+
+PATCHES=(
+	"${FILESDIR}/${P}-zstd.patch"
+	"${FILESDIR}/${P}-zstd2.patch"
+)
+
+src_configure() {
+	local -a mycmakeargs=(
+		-DHTTPLIB_COMPILE=yes
+		-DBUILD_SHARED_LIBS=yes
+		-DHTTPLIB_USE_BROTLI_IF_AVAILABLE=no
+		-DHTTPLIB_USE_OPENSSL_IF_AVAILABLE=no
+		-DHTTPLIB_USE_ZLIB_IF_AVAILABLE=no
+		-DHTTPLIB_USE_ZSTD_IF_AVAILABLE=no
+		-DHTTPLIB_REQUIRE_BROTLI=$(usex brotli)
+		-DHTTPLIB_REQUIRE_OPENSSL=$(usex ssl)
+		-DHTTPLIB_REQUIRE_ZLIB=$(usex zlib)
+		-DHTTPLIB_REQUIRE_ZSTD=$(usex zstd)
+		-DPython3_EXECUTABLE="${PYTHON}"
+	)
+	cmake-multilib_src_configure
+}
+
+multilib_src_test() {
+	cp -p -R --reflink=auto "${S}/test" ./test || die
+
+	local -a failing_tests=(
+		# Disable all online tests.
+		"*.*_Online"
+
+		# Fails on musl x86:
+		ServerTest.GetRangeWithMaxLongLength
+		ServerTest.GetStreamedWithTooManyRanges
+
+		# https://github.com/yhirose/cpp-httplib/issues/1798
+		# Filed by mgorny's testing, fails on openssl >=3.2:
+		SSLClientServerTest.ClientCertPresent
+		SSLClientServerTest.ClientEncryptedCertPresent
+		SSLClientServerTest.CustomizeServerSSLCtx
+		SSLClientServerTest.MemoryClientCertPresent
+		SSLClientServerTest.MemoryClientEncryptedCertPresent
+		SSLClientServerTest.TrustDirOptional
+
+		# https://github.com/yhirose/cpp-httplib/issues/2113
+		MaxTimeoutTest.ContentStream
+		MaxTimeoutTest.ContentStreamSSL
+	)
+
+	# Little dance to please the GTEST filter (join array using ":").
+	failing_tests_str="${failing_tests[@]}"
+	failing_tests_filter="${failing_tests_str// /:}"
+
+	# PREFIX is . to avoid calling "brew" and relying on stuff in /opt
+	GTEST_FILTER="-${failing_tests_filter}" emake -C test \
+		CXX="$(tc-getCXX)" CXXFLAGS="${CXXFLAGS} -I." PREFIX=.
+}
diff --git a/dev-cpp/cpp-httplib/files/cpp-httplib-0.20.0-zstd2.patch b/dev-cpp/cpp-httplib/files/cpp-httplib-0.20.0-zstd2.patch
new file mode 100644
index 000000000000..73f33e64268f
--- /dev/null
+++ b/dev-cpp/cpp-httplib/files/cpp-httplib-0.20.0-zstd2.patch
@@ -0,0 +1,32 @@
+https://bugs.gentoo.org/953066
+https://github.com/yhirose/cpp-httplib/pull/2126
+
+--- a/cmake/httplibConfig.cmake.in
++++ b/cmake/httplibConfig.cmake.in
+@@ -39,7 +39,25 @@ if(@HTTPLIB_IS_USING_BROTLI@)
+ endif()
+ 
+ if(@HTTPLIB_IS_USING_ZSTD@)
+-	find_dependency(zstd)
++	set(httplib_fd_zstd_quiet_arg)
++	if(${CMAKE_FIND_PACKAGE_NAME}_FIND_QUIETLY)
++		set(httplib_fd_zstd_quiet_arg QUIET)
++	endif()
++	set(httplib_fd_zstd_required_arg)
++	if(${CMAKE_FIND_PACKAGE_NAME}_FIND_REQUIRED)
++		set(httplib_fd_zstd_required_arg REQUIRED)
++	endif()
++	find_package(zstd QUIET)
++	if(NOT zstd_FOUND)
++		find_package(PkgConfig ${httplib_fd_zstd_quiet_arg} ${httplib_fd_zstd_required_arg})
++		if(PKG_CONFIG_FOUND)
++			pkg_check_modules(zstd ${httplib_fd_zstd_quiet_arg} ${httplib_fd_zstd_required_arg} IMPORTED_TARGET libzstd)
++
++			if(TARGET PkgConfig::zstd)
++				add_library(zstd::libzstd ALIAS PkgConfig::zstd)
++			endif()
++		endif()
++	endif()
+ 	set(httplib_zstd_FOUND ${zstd_FOUND})
+ endif()
+