lang/rust: unbundle libgit2/libssh2

- libgit2 in ports is nowadays newer than bundled version
- libssh2 was already unbundled until 1.29.0 update
- Unbundle libssh2 for USES=cargo (unused atm)

PR:		231411
Approved by:	rust (dumbbell, tobik)

Mk/Uses/cargo.mk

@@ -153,6 +153,12 @@ CARGO_ENV+=	LIBGIT2_SYS_USE_PKG_CONFIG=1
 LIB_DEPENDS+=	libgit2.so:devel/libgit2
 .endif
 
+.if ${CARGO_CRATES:Mlibssh2-sys-[0-9]*}
+# Use the system's libssh2 instead of building the bundled version
+CARGO_ENV+=	LIBSSH2_SYS_USE_PKG_CONFIG=1
+LIB_DEPENDS+=	libssh2.so:security/libssh2
+.endif
+
 .if ${CARGO_CRATES:Monig_sys-[0-9]*}
 # onig_sys always prefers the system library but will try to link
 # statically with it.  Since devel/oniguruma doesn't provide a static

lang/rust/Makefile

@@ -3,7 +3,7 @@
 
 PORTNAME=	rust
 PORTVERSION?=	1.29.0
-PORTREVISION?=
+PORTREVISION?=	1
 CATEGORIES=	lang
 MASTER_SITES=	http://static.rust-lang.org/dist/:src \
 		LOCAL/dumbbell/rust:rust_bootstrap \
@@ -30,7 +30,8 @@ LICENSE_COMB=	dual
 LICENSE_FILE_MIT=	${WRKSRC}/LICENSE-MIT
 
 BUILD_DEPENDS=		cmake:devel/cmake
-LIB_DEPENDS=		libcurl.so:ftp/curl \
+LIB_DEPENDS=		libgit2.so:devel/libgit2 \
+			libcurl.so:ftp/curl \
 			libssh2.so:security/libssh2
 
 ONLY_FOR_ARCHS?=	aarch64 amd64 i386
@@ -97,6 +98,8 @@ PLIST_FILES=		lib/rustlib/components \
 .include <bsd.port.pre.mk>
 
 X_PY_ENV=	HOME="${WRKDIR}" \
+		LIBGIT2_SYS_USE_PKG_CONFIG=1 \
+		LIBSSH2_SYS_USE_PKG_CONFIG=1 \
 		OPENSSL_DIR="${OPENSSLBASE}"
 X_PY_CMD=	${PYTHON_CMD} ${WRKSRC}/x.py