refactor cargo.bbclass for easier use when we are not directly driving cargo

classes/cargo.bbclass

@@ -1,6 +1,6 @@
 inherit rust
 
-CARGO = "cargo"
+export CARGO ?= "cargo"
 
 def cargo_base_dep(d):
     deps = ""
@@ -23,7 +23,7 @@ export RUST_BACKTRACE = "1"
 
 EXTRA_OECARGO_PATHS ??= ""
 
-oe_cargo_config () {
+cargo_do_configure () {
 	mkdir -p .cargo
 	# FIXME: we currently blow away the entire config because duplicate
 	# sections are treated as a parse error by cargo (causing the entire
@@ -61,16 +61,15 @@ export RUST_CFLAGS = "${HOST_CC_ARCH}${TOOLCHAIN_OPTIONS} ${CFLAGS}"
 export RUST_BUILD_CC = "${CCACHE}${BUILD_PREFIX}gcc"
 export RUST_BUILD_CFLAGS = "${BUILD_CC_ARCH} ${BUILD_CFLAGS}"
 
+export CARGO_BUILD_FLAGS = "-v --target ${HOST_SYS} --release"
 oe_cargo_build () {
 	which cargo
 	which rustc
-	bbnote ${CARGO} build --target ${TARGET_SYS} "$@"
-	oe_cargo_config
-	"${CARGO}" build -v --target "${TARGET_SYS}" --release "$@"
+	bbnote ${CARGO} build ${CARGO_BUILD_FLAGS} "$@"
+	"${CARGO}" build ${CARGO_BUILD_FLAGS} "$@"
 }
 
-cargo_do_compile () {
-	cd "${B}"
+oe_cargo_fix_env () {
 	export CC="${RUST_CC}"
 	export CFLAGS="${RUST_CFLAGS}"
 	export AR="${AR}"
@@ -80,9 +79,15 @@ cargo_do_compile () {
 	export HOST_CC="${RUST_BUILD_CC}"
 	export HOST_CFLAGS="${RUST_BUILD_CFLAGS}"
 	export HOST_AR="${BUILD_AR}"
+}
+
+cargo_do_compile () {
+	cd "${B}"
+	oe_cargo_fix_env
 	oe_cargo_build
 }
 
+# All but the most simple projects will need to override this.
 cargo_do_install () {
 	install -d "${D}${bindir}"
 	for tgt in "${B}/target/${HOST_SYS}/release/"*; do
@@ -92,4 +97,4 @@ cargo_do_install () {
 	done
 }
 
-EXPORT_FUNCTIONS do_compile do_install
+EXPORT_FUNCTIONS do_compile do_install do_configure

recipes/cargo/cargo.inc

@@ -39,7 +39,7 @@ do_configure () {
 
 	# cargo downloads a cargo snapshot to build itself using cargo, we need
 	# to override it's arch info.
-	oe_cargo_config
+	cargo_do_configure
 }
 
 do_compile () {
@@ -47,12 +47,7 @@ do_compile () {
 	# HOST is set once we have this cargo, but we need to manually
 	# set it for the bootstrap.
 	export HOST="${BUILD_SYS}"
-	export TARGET_CC="${RUST_CC}"
-	export TARGET_CFLAGS="${RUST_CFLAGS}"
-	export TARGET_AR="${AR}"
-	export HOST_CC="${RUST_BUILD_CC}"
-	export HOST_CFLAGS="${RUST_BUILD_CFLAGS}"
-	export HOST_AR="${BUILD_AR}"
+	oe_cargo_fix_env
 	oe_runmake ARGS="--verbose"
 }
 

recipes/cargo/cargo_2014-12-04.bb

@@ -2,7 +2,7 @@ SRCREV_cargo = "70f5205dba9887d8dab07f72dbc507aa74b12c1f"
 require cargo.inc
 
 SRC_URI += " \
-	file:///0001-custom_build-build-output-goes-in-the-directory-for-.patch \
+	file://0001-custom_build-build-output-goes-in-the-directory-for-.patch \
 \
 	git://github.com/carllerche/curl-rust.git;protocol=https;name=curl-rust;destsuffix=curl-rust \
 	file://curl-rust/0001-curl-sys-avoid-explicitly-linking-in-openssl-If-it-.patch;patchdir=../curl-rust \