Bug 1490948: Adjustments for the source package; r=chmanchester

- Embed vendored Rust dependencies into the source package.
- Don't use --freeze with Cargo in JS standalone builds: since all the Rust
  dependencies are vendored in, it won't trigger an update of the toplevel
  Cargo.lock file for a standalone build in the non-package build case.

--HG--
extra : rebase_source : 06704eb326aad36a870586694a99964ad7a4dbfa
extra : histedit_source : 1502d976bc12a3eed17efaaf5dd2d4f46d0b00d5

config/rules.mk

@@ -842,7 +842,14 @@ cargo_build_flags = $(CARGOFLAGS)
 ifndef MOZ_DEBUG_RUST
 cargo_build_flags += --release
 endif
+
+# The Spidermonkey library can be built from a package tarball outside the
+# tree, so we want to let Cargo create lock files in this case. When built
+# within a tree, the Rust dependencies have been vendored in so Cargo won't
+# touch the lock file.
+ifndef JS_STANDALONE
 cargo_build_flags += --frozen
+endif
 
 cargo_build_flags += --manifest-path $(CARGO_FILE)
 ifdef BUILD_VERBOSE_LOG

js/src/make-source-package.sh

@@ -123,6 +123,9 @@ case $cmd in
     cp -pPR \
         ${TOPSRCDIR}/third_party/python \
         ${tgtpath}/third_party
+    cp -pPR \
+        ${TOPSRCDIR}/third_party/rust \
+        ${tgtpath}/third_party
     ${MKDIR} -p ${tgtpath}/dom/bindings
     cp -pPR \
         ${TOPSRCDIR}/dom/bindings/mozwebidlcodegen \