Update libgit2 to v1.3.0

This commit updates `libgit2` to `v1.3.0`, and the `git2go` version
which is being tested against to `v33.0.1`.

The default build configuration has changed to no longer depend on
OpenSSL or LibSSH2, as native Go transport is now working for
`git2go`.

Signed-off-by: Hidde Beydals <hello@hidde.co>

Author: hiddeco

Makefile

@@ -5,7 +5,7 @@ STATIC_TEST_TAG := test
 PLATFORMS ?= linux/amd64,linux/arm/v7,linux/arm64
 BUILD_ARGS ?=
 
-GIT2GO_TAG ?= v31.6.1
+GIT2GO_TAG ?= v33.0.1
 
 .PHONY: build
 build:

hack/Makefile

@@ -15,14 +15,14 @@ INSTALL_LIBDIR ?= $(INSTALL_PREFIX)/lib/$(shell xx-info triple)
 endif
 BUILD_TYPE ?= "RelWithDebInfo"
 FLAGS ?=
-USE_HTTPS ?= OpenSSL
-USE_SSH ?= ON
+USE_HTTPS ?= OFF
+USE_SSH ?= OFF
 
 # Cmake version to be installed.
 CMAKE_VERSION ?= 3.21.3
 
 # Libgit2 version to be compiled and installed.
-LIBGIT2_VERSION ?= 1.1.1
+LIBGIT2_VERSION ?= 1.3.0
 # In some scenarios libgit2 needs to be checked out to a specific commit.
 # This takes presidence over LIBGIT_VERSION if defined.
 # Ref: https://github.com/libgit2/git2go/issues/834
@@ -65,19 +65,27 @@ ifeq (debian,$(XX_VENDOR))
 # certain key formats).
 # Ref: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=668271
 # Ref: https://github.com/ARMmbed/mbedtls/issues/2452#issuecomment-802683144
+DEPENDENCIES = zlib1g-dev
+ifneq ("OFF",$(USE_HTTPS))
+DEPENDENCIES += libssl-dev
+endif
+ifneq ("OFF",$(USE_SSH))
+DEPENDENCIES += libssh2-1-dev
+endif
 dependencies:
 	set -e; \
 	echo "deb http://deb.debian.org/debian sid main" > /etc/apt/sources.list.d/sid.list \
 	&& echo "deb-src http://deb.debian.org/debian sid main" /etc/apt/sources.list.d/sid.list \
 	&& xx-apt update \
-	&& xx-apt -t sid install --no-install-recommends -y zlib1g-dev libssl-dev libssh2-1-dev
+	&& xx-apt -t sid install --no-install-recommends -y $(DEPENDENCIES)
 endif
 .PHONY: dependencies
 
 libgit2: $(LIBGIT2)
 .PHONY: libgit2
 
 ifdef HAS_BREW
+ifneq ("OFF",$(USE_HTTPS))
 HAS_OPENSSL := $(shell brew --prefix openssl@1.1)
 # NB: the OPENSSL_LDFLAGS ensures the path is included in the libgit2.pc
 # file. As a standard brew installation doesn't appear to be system wide
@@ -87,11 +95,14 @@ ifdef HAS_OPENSSL
 	PKG_CONFIG_PATH := $(PKG_CONFIG_PATH):$(HAS_OPENSSL)/lib/pkgconfig
 	FLAGS += -DOPENSSL_LDFLAGS:STRING='-L $(HAS_OPENSSL)/lib'
 endif
+endif
+ifneq ("OFF",$(USE_SSH))
 HAS_LIBSSH2 := $(shell brew --prefix libssh2)
 ifdef HAS_LIBSSH2
 	PKG_CONFIG_PATH := $(PKG_CONFIG_PATH):$(HAS_LIBSSH2)/lib/pkgconfig
 endif
 endif
+endif
 
 $(LIBGIT2):
 	set -e; \