Rename rust-bin's PKGNAME to rust-bin. Add rust.mk for rust packages.

This allows rust-bin and rust to coexist in bulk builds (for testing, etc),
but the packages still may not be installed at the same time.

rust.mk as a solution for picking the correct rust variant was suggested
by gdt@. It is intended to be included directly by packages that do not
use cargo.mk, and indirectly by packages that do use cargo.mk.

rust.mk provides one user-settable variable:

RUST_TYPE
	as before, whether to bootstrap rust from source or use
	official binaries. may be "src" or "bin"

And two package-settable variables:

RUST_REQ
	the minimum version of Rust required by the package.
	defaults to "1.20.0"

RUST_RUNTIME
	whether Rust is a runtime dependency, may be "yes" or "no"

4 files changed, 62 insertions, 43 deletions

diff --git a/lang/rust/Makefile b/lang/rust/Makefile
index 08aa2f9088d..71ab6239349 100644
--- a/lang/rust/Makefile
+++ b/lang/rust/Makefile
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.179 2020/06/14 14:29:25 gdt Exp $
+# $NetBSD: Makefile,v 1.180 2020/06/14 15:33:27 nia Exp $
 
 DISTNAME=	rustc-1.43.1-src
 PKGNAME=	${DISTNAME:S/rustc/rust/:S/-src//}
@@ -11,6 +11,8 @@ HOMEPAGE=	https://www.rust-lang.org/
 COMMENT=	Safe, concurrent, practical language
 LICENSE=	mit OR apache-2.0
 
+CONFLICTS+=	rust-bin-[0-9]*
+
 USE_GCC_RUNTIME=	yes
 USE_LANGUAGES=		c c++11
 USE_LIBTOOL=		yes
@@ -20,12 +22,6 @@ USE_TOOLS+=		bash ggrep gmake perl:build pkg-config
 # build on 7).  Mark earlier versions as broken.
 BROKEN_ON_PLATFORM+=	NetBSD-[1-7].*-*
 
-.include "type.mk"
-
-.if ${RUST_TYPE} != "src"
-PKG_SKIP_REASON+=	"Rust source package, RUST_TYPE is bin"
-.endif
-
 HAS_CONFIGURE=			yes
 PYTHON_FOR_BUILD_ONLY=		yes
 CONFIG_SHELL=			${PYTHONBIN}
diff --git a/lang/rust/cargo.mk b/lang/rust/cargo.mk
index abba173d573..3195eca1206 100644
--- a/lang/rust/cargo.mk
+++ b/lang/rust/cargo.mk
@@ -1,4 +1,4 @@
-# $NetBSD: cargo.mk,v 1.16 2020/06/14 11:19:34 rillig Exp $
+# $NetBSD: cargo.mk,v 1.17 2020/06/14 15:33:27 nia Exp $
 #
 # Common logic that can be used by packages that depend on cargo crates
 # from crates.io. This lets existing pkgsrc infrastructure fetch and verify
@@ -22,13 +22,7 @@
 
 MASTER_SITES?=	-${MASTER_SITE_CRATESIO}${PKGBASE}/${PKGVERSION_NOREV}/download
 
-.include "type.mk"
-
-.if ${RUST_TYPE} != "bin"
-BUILD_DEPENDS+=	rust-[0-9]*:../../lang/rust
-.else
-BUILD_DEPENDS+=	rust-[0-9]*:../../lang/rust-bin
-.endif
+.include "../../lang/rust/rust.mk"
 
 USE_TOOLS+=		bsdtar digest
 CARGO_VENDOR_DIR=	${WRKDIR}/vendor
diff --git a/lang/rust/rust.mk b/lang/rust/rust.mk
new file mode 100644
index 00000000000..f683026a1ad
--- /dev/null
+++ b/lang/rust/rust.mk
@@ -0,0 +1,57 @@
+# $NetBSD: rust.mk,v 1.1 2020/06/14 15:33:27 nia Exp $
+# 
+# This file determines the type of rust package to use.
+#
+# === User-settable variables ===
+#
+# RUST_TYPE
+#	The preferred type of Rust release to use -
+#	either bootstrap-from-source or an official binary.
+#
+#	Official Rust binaries are only published for certain platforms,
+#	including Darwin, Linux, and NetBSD x86_64.
+#
+#	Possible values: src bin
+#	Default: src
+#
+# === Package-settable variables ===
+#
+# RUST_REQ
+#	The minimum version of Rust required by the package.
+#	Binary Rust is only published for certain platforms.
+#
+#	Default: 1.20.0
+#
+# RUST_RUNTIME
+#	Whether rust is a runtime dependency.
+#	Usually it is only needed to build.
+#
+#	Possible values: yes no
+#	Default: no
+
+.include "../../mk/bsd.fast.prefs.mk"
+
+RUST_REQ?=	1.20.0
+RUST_RUNTIME?=	no
+
+.if !empty(MACHINE_PLATFORM:MNetBSD-*-x86_64)
+RUST_TYPE?=	bin
+.else
+RUST_TYPE?=	src
+.endif
+
+.if ${RUST_TYPE} == "bin"
+.  if ${RUST_RUNTIME} != "no"
+BUILDLINK_DEPMETHOD.rust-bin?=		build
+.  endif
+BUILDLINK_API_DEPENDS.rust-bin+=	rust-bin>=${RUST_REQ}
+.  include "../../lang/rust-bin/buildlink3.mk"
+.endif
+
+.if ${RUST_TYPE} == "src"
+.  if ${RUST_RUNTIME} != "no"
+BUILDLINK_DEPMETHOD.rust?=		build
+.  endif
+BUILDLINK_API_DEPENDS.rust+=		rust>=${RUST_REQ}
+.  include "../../lang/rust/buildlink3.mk"
+.endif
diff --git a/lang/rust/type.mk b/lang/rust/type.mk
deleted file mode 100644
index d2267eebb36..00000000000
--- a/lang/rust/type.mk
+++ /dev/null
@@ -1,28 +0,0 @@
-# $NetBSD: type.mk,v 1.2 2020/05/18 16:33:44 wiz Exp $
-# 
-# This file determines the type of rust package to use -
-# binary (as via rustup) or a source bootstrap.
-#
-# Rust only publishes binaries for specific platforms in specific
-# tiers.
-#
-# === User-settable variables ===
-#
-# RUST_TYPE
-#	The preferred Rust type to use.
-#
-#	Possible values: src bin
-#	Default: src
-
-.if !defined(RUST_TYPE)
-.  include "../../mk/bsd.fast.prefs.mk"
-
-# The Rust bootstrapping process is often particularly slow
-# and unreliable on NetBSD due to ld.so bugs
-.  if !empty(MACHINE_PLATFORM:MNetBSD-*-x86_64)
-RUST_TYPE?=	bin
-.  else
-RUST_TYPE?=	src
-.  endif
-
-.endif # !defined(RUST_TYPE)