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# Select the backend to use
# We try to find any packages our backends might use
FIND_PACKAGE(OpenSSL)
FIND_PACKAGE(mbedTLS)
IF (CMAKE_SYSTEM_NAME MATCHES "Darwin")
FIND_PACKAGE(Security)
FIND_PACKAGE(CoreFoundation)
ENDIF()
# Auto-select TLS backend
IF (USE_HTTPS STREQUAL ON)
IF (SECURITY_FOUND)
IF (SECURITY_HAS_SSLCREATECONTEXT)
SET(HTTPS_BACKEND "SecureTransport")
ELSE()
MESSAGE(STATUS "Security framework is too old, falling back to OpenSSL")
SET(HTTPS_BACKEND "OpenSSL")
ENDIF()
ELSEIF (WINHTTP)
SET(HTTPS_BACKEND "WinHTTP")
ELSEIF(OPENSSL_FOUND)
SET(HTTPS_BACKEND "OpenSSL")
ELSEIF(MBEDTLS_FOUND)
SET(HTTPS_BACKEND "mbedTLS")
ELSE()
MESSAGE(FATAL_ERROR "Unable to autodetect a usable HTTPS backend."
"Please pass the backend name explicitly (-DUSE_HTTPS=backend)")
ENDIF()
ELSEIF(USE_HTTPS)
# HTTPS backend was explicitly set
SET(HTTPS_BACKEND ${USE_HTTPS})
ELSE()
SET(HTTPS_BACKEND NO)
ENDIF()
IF(HTTPS_BACKEND)
# Check that we can find what's required for the selected backend
IF (HTTPS_BACKEND STREQUAL "SecureTransport")
IF (NOT COREFOUNDATION_FOUND)
MESSAGE(FATAL_ERROR "Cannot use SecureTransport backend, CoreFoundation.framework not found")
ENDIF()
IF (NOT SECURITY_FOUND)
MESSAGE(FATAL_ERROR "Cannot use SecureTransport backend, Security.framework not found")
ENDIF()
IF (NOT SECURITY_HAS_SSLCREATECONTEXT)
MESSAGE(FATAL_ERROR "Cannot use SecureTransport backend, SSLCreateContext not supported")
ENDIF()
SET(GIT_SECURE_TRANSPORT 1)
LIST(APPEND LIBGIT2_SYSTEM_INCLUDES ${SECURITY_INCLUDE_DIR})
LIST(APPEND LIBGIT2_LIBS ${COREFOUNDATION_LDFLAGS} ${SECURITY_LDFLAGS})
LIST(APPEND LIBGIT2_PC_LIBS ${COREFOUNDATION_LDFLAGS} ${SECURITY_LDFLAGS})
ELSEIF (HTTPS_BACKEND STREQUAL "OpenSSL")
IF (NOT OPENSSL_FOUND)
MESSAGE(FATAL_ERROR "Asked for OpenSSL TLS backend, but it wasn't found")
ENDIF()
SET(GIT_OPENSSL 1)
LIST(APPEND LIBGIT2_SYSTEM_INCLUDES ${OPENSSL_INCLUDE_DIR})
LIST(APPEND LIBGIT2_LIBS ${OPENSSL_LIBRARIES})
LIST(APPEND LIBGIT2_PC_LIBS ${OPENSSL_LDFLAGS})
LIST(APPEND LIBGIT2_PC_REQUIRES "openssl")
ELSEIF(HTTPS_BACKEND STREQUAL "mbedTLS")
IF (NOT MBEDTLS_FOUND)
MESSAGE(FATAL_ERROR "Asked for mbedTLS backend, but it wasn't found")
ENDIF()
IF(NOT CERT_LOCATION)
MESSAGE(STATUS "Auto-detecting default certificates location")
IF(CMAKE_SYSTEM_NAME MATCHES Darwin)
# Check for an Homebrew installation
SET(OPENSSL_CMD "/usr/local/opt/openssl/bin/openssl")
ELSE()
SET(OPENSSL_CMD "openssl")
ENDIF()
EXECUTE_PROCESS(COMMAND ${OPENSSL_CMD} version -d OUTPUT_VARIABLE OPENSSL_DIR OUTPUT_STRIP_TRAILING_WHITESPACE)
IF(OPENSSL_DIR)
STRING(REGEX REPLACE "^OPENSSLDIR: \"(.*)\"$" "\\1/" OPENSSL_DIR ${OPENSSL_DIR})
SET(OPENSSL_CA_LOCATIONS
"ca-bundle.pem" # OpenSUSE Leap 42.1
"cert.pem" # Ubuntu 14.04, FreeBSD
"certs/ca-certificates.crt" # Ubuntu 16.04
"certs/ca.pem" # Debian 7
)
FOREACH(SUFFIX IN LISTS OPENSSL_CA_LOCATIONS)
SET(LOC "${OPENSSL_DIR}${SUFFIX}")
IF(NOT CERT_LOCATION AND EXISTS "${OPENSSL_DIR}${SUFFIX}")
SET(CERT_LOCATION ${LOC})
ENDIF()
ENDFOREACH()
ELSE()
MESSAGE(FATAL_ERROR "Unable to find OpenSSL executable. Please provide default certificate location via CERT_LOCATION")
ENDIF()
ENDIF()
IF(CERT_LOCATION)
IF(NOT EXISTS ${CERT_LOCATION})
MESSAGE(FATAL_ERROR "Cannot use CERT_LOCATION=${CERT_LOCATION} as it doesn't exist")
ENDIF()
ADD_FEATURE_INFO(CERT_LOCATION ON "using certificates from ${CERT_LOCATION}")
ADD_DEFINITIONS(-DGIT_DEFAULT_CERT_LOCATION="${CERT_LOCATION}")
ENDIF()
SET(GIT_MBEDTLS 1)
LIST(APPEND LIBGIT2_SYSTEM_INCLUDES ${MBEDTLS_INCLUDE_DIR})
LIST(APPEND LIBGIT2_LIBS ${MBEDTLS_LIBRARIES})
# mbedTLS has no pkgconfig file, hence we can't require it
# https://github.com/ARMmbed/mbedtls/issues/228
# For now, pass its link flags as our own
LIST(APPEND LIBGIT2_PC_LIBS ${MBEDTLS_LIBRARIES})
ELSEIF (HTTPS_BACKEND STREQUAL "WinHTTP")
# WinHTTP setup was handled in the WinHTTP-specific block above
ELSE()
MESSAGE(FATAL_ERROR "Asked for backend ${HTTPS_BACKEND} but it wasn't found")
ENDIF()
SET(GIT_HTTPS 1)
ADD_FEATURE_INFO(HTTPS GIT_HTTPS "using ${HTTPS_BACKEND}")
ELSE()
SET(GIT_HTTPS 0)
ADD_FEATURE_INFO(HTTPS NO "")
ENDIF()
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