fixes, catch some bugs earlier, reindent python

classes/rust-cross.bbclass

@@ -1,3 +1,18 @@
 inherit cross
-DEPENDS += "virtual/${TARGET_PREFIX}gcc"
-PN = "rust-cross"
+
+# Otherwise we'll depend on what we provide
+INHIBIT_DEFAULT_DEPS = "1"
+
+
+DEPENDS += "virtual/${TARGET_PREFIX}gcc rust-native"
+PROVIDES = "virtual/${TARGET_PREFIX}rust"
+PN = "rust-cross-${TARGET_ARCH}"
+
+## gcc-cross settings
+# INHIBIT_DEFAULT_DEPS = "1"
+# INHIBIT_PACKAGE_STRIP = "1"
+# ARCH_FLAGS_FOR_TARGET += "-isystem${STAGING_DIR_NATIVE}${target_includedir}"
+
+
+# TODO: use rust-native instead of a snapshot
+EXTRA_OECONF += ""

classes/rust.bbclass

@@ -1,6 +1,18 @@
 RUSTC = "rustc"
 RUSTC_ARCHFLAGS += "--target=${TARGET_SYS} -C rpath"
 
+def rust_base_dep(d):
+    # Taken from meta/classes/base.bbclass `base_dep_prepend` and modified to
+    # use rust instead of gcc
+    
+    deps = ""
+    if not d.getVar('INHIBIT_DEFAULT_DEPS'):
+        if (d.getVar('HOST_SYS', True) != d.getVar('BUILD_SYS', True)):
+            deps += " virtual/${TARGET_PREFIX}rust"
+    return deps
+
+BASEDEPENDS_append = " ${@rust_base_dep(d)}"
+
 # BUILD_LDFLAGS
 # 	${STAGING_LIBDIR_NATIVE}
 # 	${STAGING_BASE_LIBDIR_NATIVE}