Remove Rust from the tree.

Part 4 for #58

26 files changed, 4 insertions, 552 deletions

diff --git a/python/mozbuild/mozbuild/backend/recursivemake.py b/python/mozbuild/mozbuild/backend/recursivemake.py
index 132dcf9447..a314124f44 100644
--- a/python/mozbuild/mozbuild/backend/recursivemake.py
+++ b/python/mozbuild/mozbuild/backend/recursivemake.py
@@ -59,7 +59,6 @@ from ..frontend.data import (
     ObjdirPreprocessedFiles,
     PerSourceFlag,
     Program,
-    RustLibrary,
     SharedLibrary,
     SimpleProgram,
     Sources,
@@ -574,12 +573,6 @@ class RecursiveMakeBackend(CommonBackend):
             else:
                 return False
 
-        elif isinstance(obj, RustLibrary):
-            self.backend_input_files.add(obj.cargo_file)
-            self._process_rust_library(obj, backend_file)
-            # No need to call _process_linked_libraries, because Rust
-            # libraries are self-contained objects at this point.
-
         elif isinstance(obj, SharedLibrary):
             self._process_shared_library(obj, backend_file)
             self._process_linked_libraries(obj, backend_file)
@@ -1172,10 +1165,6 @@ class RecursiveMakeBackend(CommonBackend):
         if libdef.no_expand_lib:
             backend_file.write('NO_EXPAND_LIBS := 1\n')
 
-    def _process_rust_library(self, libdef, backend_file):
-        backend_file.write_once('RUST_LIBRARY_FILE := %s\n' % libdef.import_name)
-        backend_file.write('CARGO_FILE := $(srcdir)/Cargo.toml')
-
     def _process_host_library(self, libdef, backend_file):
         backend_file.write('HOST_LIBRARY_NAME = %s\n' % libdef.basename)
 
@@ -1186,7 +1175,7 @@ class RecursiveMakeBackend(CommonBackend):
     def _process_linked_libraries(self, obj, backend_file):
         def write_shared_and_system_libs(lib):
             for l in lib.linked_libraries:
-                if isinstance(l, (StaticLibrary, RustLibrary)):
+                if isinstance(l, StaticLibrary):
                     write_shared_and_system_libs(l)
                 else:
                     backend_file.write_once('SHARED_LIBS += %s/%s\n'
@@ -1208,11 +1197,7 @@ class RecursiveMakeBackend(CommonBackend):
                     self._build_target_for_obj(lib))
             relpath = pretty_relpath(lib)
             if isinstance(obj, Library):
-                if isinstance(lib, RustLibrary):
-                    # We don't need to do anything here; we will handle
-                    # linkage for any RustLibrary elsewhere.
-                    continue
-                elif isinstance(lib, StaticLibrary):
+                if isinstance(lib, StaticLibrary):
                     backend_file.write_once('STATIC_LIBS += %s/%s\n'
                                         % (relpath, lib.import_name))
                     if isinstance(obj, SharedLibrary):
@@ -1235,12 +1220,6 @@ class RecursiveMakeBackend(CommonBackend):
                 backend_file.write_once('HOST_LIBS += %s/%s\n'
                                    % (relpath, lib.import_name))
 
-        # We have to link any Rust libraries after all intermediate static
-        # libraries have been listed to ensure that the Rust libraries are
-        # searched after the C/C++ objects that might reference Rust symbols.
-        if isinstance(obj, SharedLibrary):
-            self._process_rust_libraries(obj, backend_file, pretty_relpath)
-
         for lib in obj.linked_system_libs:
             if obj.KIND == 'target':
                 backend_file.write_once('OS_LIBS += %s\n' % lib)
@@ -1250,23 +1229,6 @@ class RecursiveMakeBackend(CommonBackend):
         # Process library-based defines
         self._process_defines(obj.lib_defines, backend_file)
 
-    def _process_rust_libraries(self, obj, backend_file, pretty_relpath):
-        assert isinstance(obj, SharedLibrary)
-
-        # If this library does not depend on any Rust libraries, then we are done.
-        direct_linked = [l for l in obj.linked_libraries if isinstance(l, RustLibrary)]
-        if not direct_linked:
-            return
-
-        # We should have already checked this in Linkable.link_library.
-        assert len(direct_linked) == 1
-
-        # TODO: see bug 1310063 for checking dependencies are set up correctly.
-
-        direct_linked = direct_linked[0]
-        backend_file.write('RUST_STATIC_LIB_FOR_SHARED_LIB := %s/%s\n' %
-                           (pretty_relpath(direct_linked), direct_linked.import_name))
-
     def _process_final_target_files(self, obj, files, backend_file):
         target = obj.install_target
         path = mozpath.basedir(target, (
@@ -1445,11 +1407,6 @@ class RecursiveMakeBackend(CommonBackend):
 
         self._makefile_out_count += 1
 
-    def _handle_linked_rust_crates(self, obj, extern_crate_file):
-        backend_file = self._get_backend_file_for(obj)
-
-        backend_file.write('RS_STATICLIB_CRATE_SRC := %s\n' % extern_crate_file)
-
     def _handle_ipdl_sources(self, ipdl_dir, sorted_ipdl_sources,
                              unified_ipdl_cppsrcs_mapping):
         # Write out a master list of all IPDL source files.
diff --git a/python/mozbuild/mozbuild/frontend/data.py b/python/mozbuild/mozbuild/frontend/data.py
index fdf8cca172..fb0bf2405c 100644
--- a/python/mozbuild/mozbuild/frontend/data.py
+++ b/python/mozbuild/mozbuild/frontend/data.py
@@ -310,10 +310,6 @@ class LinkageWrongKindError(Exception):
     """Error thrown when trying to link objects of the wrong kind"""
 
 
-class LinkageMultipleRustLibrariesError(Exception):
-    """Error thrown when trying to link multiple Rust libraries to an object"""
-
-
 class Linkable(ContextDerived):
     """Generic context derived container object for programs and libraries"""
     __slots__ = (
@@ -337,13 +333,6 @@ class Linkable(ContextDerived):
                 'Linkable.link_library() does not take components.')
         if obj.KIND != self.KIND:
             raise LinkageWrongKindError('%s != %s' % (obj.KIND, self.KIND))
-        # Linking multiple Rust libraries into an object would result in
-        # multiple copies of the Rust standard library, as well as linking
-        # errors from duplicate symbols.
-        if isinstance(obj, RustLibrary) and any(isinstance(l, RustLibrary)
-                                                for l in self.linked_libraries):
-            raise LinkageMultipleRustLibrariesError("Cannot link multiple Rust libraries into %s",
-                                                    self)
         self.linked_libraries.append(obj)
         if obj.cxx_link:
             self.cxx_link = True
@@ -474,40 +463,6 @@ class StaticLibrary(Library):
         self.no_expand_lib = no_expand_lib
 
 
-class RustLibrary(StaticLibrary):
-    """Context derived container object for a static library"""
-    __slots__ = (
-        'cargo_file',
-        'crate_type',
-        'dependencies',
-        'deps_path',
-    )
-
-    def __init__(self, context, basename, cargo_file, crate_type, dependencies, **args):
-        StaticLibrary.__init__(self, context, basename, **args)
-        self.cargo_file = cargo_file
-        self.crate_type = crate_type
-        # We need to adjust our naming here because cargo replaces '-' in
-        # package names defined in Cargo.toml with underscores in actual
-        # filenames. But we need to keep the basename consistent because
-        # many other things in the build system depend on that.
-        assert self.crate_type == 'staticlib'
-        self.lib_name = '%s%s%s' % (context.config.lib_prefix,
-                                     basename.replace('-', '_'),
-                                     context.config.lib_suffix)
-        self.dependencies = dependencies
-        # cargo creates several directories and places its build artifacts
-        # in those directories.  The directory structure depends not only
-        # on the target, but also what sort of build we are doing.
-        rust_build_kind = 'release'
-        if context.config.substs.get('MOZ_DEBUG'):
-            rust_build_kind = 'debug'
-        build_dir = mozpath.join(context.config.substs['RUST_TARGET'],
-                                 rust_build_kind)
-        self.import_name = mozpath.join(build_dir, self.lib_name)
-        self.deps_path = mozpath.join(build_dir, 'deps')
-
-
 class SharedLibrary(Library):
     """Context derived container object for a shared library"""
     __slots__ = (
diff --git a/python/mozbuild/mozbuild/frontend/emitter.py b/python/mozbuild/mozbuild/frontend/emitter.py
index 52f5718672..25c5826626 100644
--- a/python/mozbuild/mozbuild/frontend/emitter.py
+++ b/python/mozbuild/mozbuild/frontend/emitter.py
@@ -61,7 +61,6 @@ from .data import (
     PreprocessedTestWebIDLFile,
     PreprocessedWebIDLFile,
     Program,
-    RustLibrary,
     SdkFiles,
     SharedLibrary,
     SimpleProgram,
@@ -198,7 +197,7 @@ class TreeMetadataEmitter(LoggingMixin):
     def _emit_libs_derived(self, contexts):
         # First do FINAL_LIBRARY linkage.
         for lib in (l for libs in self._libs.values() for l in libs):
-            if not isinstance(lib, (StaticLibrary, RustLibrary)) or not lib.link_into:
+            if not isinstance(lib, StaticLibrary) or not lib.link_into:
                 continue
             if lib.link_into not in self._libs:
                 raise SandboxValidationError(
@@ -408,66 +407,6 @@ class TreeMetadataEmitter(LoggingMixin):
                     '%s %s of crate %s refers to a non-existent path' % (description, dep_crate_name, crate_name),
                     context)
 
-    def _rust_library(self, context, libname, static_args):
-        # We need to note any Rust library for linking purposes.
-        cargo_file = mozpath.join(context.srcdir, 'Cargo.toml')
-        if not os.path.exists(cargo_file):
-            raise SandboxValidationError(
-                'No Cargo.toml file found in %s' % cargo_file, context)
-
-        config = self._parse_cargo_file(cargo_file)
-        crate_name = config['package']['name']
-
-        if crate_name != libname:
-            raise SandboxValidationError(
-                'library %s does not match Cargo.toml-defined package %s' % (libname, crate_name),
-                context)
-
-        # Check that the [lib.crate-type] field is correct
-        lib_section = config.get('lib', None)
-        if not lib_section:
-            raise SandboxValidationError(
-                'Cargo.toml for %s has no [lib] section' % libname,
-                context)
-
-        crate_type = lib_section.get('crate-type', None)
-        if not crate_type:
-            raise SandboxValidationError(
-                'Can\'t determine a crate-type for %s from Cargo.toml' % libname,
-                context)
-
-        crate_type = crate_type[0]
-        if crate_type != 'staticlib':
-            raise SandboxValidationError(
-                'crate-type %s is not permitted for %s' % (crate_type, libname),
-                context)
-
-        # Check that the [profile.{dev,release}.panic] field is "abort"
-        profile_section = config.get('profile', None)
-        if not profile_section:
-            raise SandboxValidationError(
-                'Cargo.toml for %s has no [profile] section' % libname,
-                context)
-
-        for profile_name in ['dev', 'release']:
-            profile = profile_section.get(profile_name, None)
-            if not profile:
-                raise SandboxValidationError(
-                    'Cargo.toml for %s has no [profile.%s] section' % (libname, profile_name),
-                    context)
-
-            panic = profile.get('panic', None)
-            if panic != 'abort':
-                raise SandboxValidationError(
-                    ('Cargo.toml for %s does not specify `panic = "abort"`'
-                     ' in [profile.%s] section') % (libname, profile_name),
-                    context)
-
-        dependencies = set(config.get('dependencies', {}).iterkeys())
-
-        return RustLibrary(context, libname, cargo_file, crate_type,
-                           dependencies, **static_args)
-
     def _handle_linkables(self, context, passthru, generated_files):
         linkables = []
         host_linkables = []
@@ -688,11 +627,7 @@ class TreeMetadataEmitter(LoggingMixin):
                         'generate_symbols_file', lib.symbols_file,
                         [symbols_file], defines)
             if static_lib:
-                is_rust_library = context.get('IS_RUST_LIBRARY')
-                if is_rust_library:
-                    lib = self._rust_library(context, libname, static_args)
-                else:
-                    lib = StaticLibrary(context, libname, **static_args)
+                lib = StaticLibrary(context, libname, **static_args)
                 self._libs[libname].append(lib)
                 self._linkage.append((context, lib, 'USE_LIBS'))
                 linkables.append(lib)
diff --git a/python/mozbuild/mozbuild/test/frontend/data/crate-dependency-path-resolution/Cargo.toml b/python/mozbuild/mozbuild/test/frontend/data/crate-dependency-path-resolution/Cargo.toml
deleted file mode 100644
index 99d10b1a65..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/crate-dependency-path-resolution/Cargo.toml
+++ /dev/null
@@ -1,18 +0,0 @@
-[package]
-name = "random-crate"
-version = "0.1.0"
-authors = [
-  "Nobody <nobody@mozilla.org>",
-]
-
-[lib]
-crate-type = ["staticlib"]
-
-[dependencies]
-deep-crate = { version = "0.1.0", path = "the/depths" }
-
-[profile.dev]
-panic = "abort"
-
-[profile.release]
-panic = "abort"
diff --git a/python/mozbuild/mozbuild/test/frontend/data/crate-dependency-path-resolution/moz.build b/python/mozbuild/mozbuild/test/frontend/data/crate-dependency-path-resolution/moz.build
deleted file mode 100644
index 01b3a35a73..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/crate-dependency-path-resolution/moz.build
+++ /dev/null
@@ -1,18 +0,0 @@
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-@template
-def Library(name):
-    '''Template for libraries.'''
-    LIBRARY_NAME = name
-
-
-@template
-def RustLibrary(name):
-    '''Template for Rust libraries.'''
-    Library(name)
-
-    IS_RUST_LIBRARY = True
-
-
-RustLibrary('random-crate')
diff --git a/python/mozbuild/mozbuild/test/frontend/data/crate-dependency-path-resolution/shallow/Cargo.toml b/python/mozbuild/mozbuild/test/frontend/data/crate-dependency-path-resolution/shallow/Cargo.toml
deleted file mode 100644
index c347f8c08b..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/crate-dependency-path-resolution/shallow/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "shallow-crate"
-version = "0.1.0"
-authors = [
-  "Nobody <nobody@mozilla.org>",
-]
diff --git a/python/mozbuild/mozbuild/test/frontend/data/crate-dependency-path-resolution/the/depths/Cargo.toml b/python/mozbuild/mozbuild/test/frontend/data/crate-dependency-path-resolution/the/depths/Cargo.toml
deleted file mode 100644
index 10a4ded0a8..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/crate-dependency-path-resolution/the/depths/Cargo.toml
+++ /dev/null
@@ -1,9 +0,0 @@
-[package]
-name = "deep-crate"
-version = "0.1.0"
-authors = [
-  "Nobody <nobody@mozilla.org>",
-]
-
-[dependencies]
-shallow-crate = { path = "../../shallow" }
diff --git a/python/mozbuild/mozbuild/test/frontend/data/multiple-rust-libraries/moz.build b/python/mozbuild/mozbuild/test/frontend/data/multiple-rust-libraries/moz.build
deleted file mode 100644
index b493ec5b5b..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/multiple-rust-libraries/moz.build
+++ /dev/null
@@ -1,27 +0,0 @@
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-@template
-def Library(name):
-    '''Template for libraries.'''
-    LIBRARY_NAME = name
-
-
-@template
-def RustLibrary(name):
-    '''Template for Rust libraries.'''
-    Library(name)
-
-    IS_RUST_LIBRARY = True
-
-Library('test')
-
-DIRS += [
-    'rust1',
-    'rust2',
-]
-
-USE_LIBS += [
-    'rust1',
-    'rust2',
-]
diff --git a/python/mozbuild/mozbuild/test/frontend/data/multiple-rust-libraries/rust1/Cargo.toml b/python/mozbuild/mozbuild/test/frontend/data/multiple-rust-libraries/rust1/Cargo.toml
deleted file mode 100644
index 9037d8f65d..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/multiple-rust-libraries/rust1/Cargo.toml
+++ /dev/null
@@ -1,15 +0,0 @@
-[package]
-name = "rust1"
-version = "0.1.0"
-authors = [
-  "Nobody <nobody@mozilla.org>",
-]
-
-[lib]
-crate-type = ["staticlib"]
-
-[profile.dev]
-panic = "abort"
-
-[profile.release]
-panic = "abort"
diff --git a/python/mozbuild/mozbuild/test/frontend/data/multiple-rust-libraries/rust1/moz.build b/python/mozbuild/mozbuild/test/frontend/data/multiple-rust-libraries/rust1/moz.build
deleted file mode 100644
index 7418cca65b..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/multiple-rust-libraries/rust1/moz.build
+++ /dev/null
@@ -1,4 +0,0 @@
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-RustLibrary('rust1')
diff --git a/python/mozbuild/mozbuild/test/frontend/data/multiple-rust-libraries/rust2/Cargo.toml b/python/mozbuild/mozbuild/test/frontend/data/multiple-rust-libraries/rust2/Cargo.toml
deleted file mode 100644
index f2001895e8..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/multiple-rust-libraries/rust2/Cargo.toml
+++ /dev/null
@@ -1,15 +0,0 @@
-[package]
-name = "rust2"
-version = "0.1.0"
-authors = [
-  "Nobody <nobody@mozilla.org>",
-]
-
-[lib]
-crate-type = ["staticlib"]
-
-[profile.dev]
-panic = "abort"
-
-[profile.release]
-panic = "abort"
diff --git a/python/mozbuild/mozbuild/test/frontend/data/multiple-rust-libraries/rust2/moz.build b/python/mozbuild/mozbuild/test/frontend/data/multiple-rust-libraries/rust2/moz.build
deleted file mode 100644
index abd34e7db9..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/multiple-rust-libraries/rust2/moz.build
+++ /dev/null
@@ -1,4 +0,0 @@
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-RustLibrary('rust2')
diff --git a/python/mozbuild/mozbuild/test/frontend/data/rust-library-dash-folding/Cargo.toml b/python/mozbuild/mozbuild/test/frontend/data/rust-library-dash-folding/Cargo.toml
deleted file mode 100644
index fa122b7ce3..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/rust-library-dash-folding/Cargo.toml
+++ /dev/null
@@ -1,15 +0,0 @@
-[package]
-name = "random-crate"
-version = "0.1.0"
-authors = [
-  "Nobody <nobody@mozilla.org>",
-]
-
-[lib]
-crate-type = ["staticlib"]
-
-[profile.dev]
-panic = "abort"
-
-[profile.release]
-panic = "abort"
diff --git a/python/mozbuild/mozbuild/test/frontend/data/rust-library-dash-folding/moz.build b/python/mozbuild/mozbuild/test/frontend/data/rust-library-dash-folding/moz.build
deleted file mode 100644
index 01b3a35a73..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/rust-library-dash-folding/moz.build
+++ /dev/null
@@ -1,18 +0,0 @@
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-@template
-def Library(name):
-    '''Template for libraries.'''
-    LIBRARY_NAME = name
-
-
-@template
-def RustLibrary(name):
-    '''Template for Rust libraries.'''
-    Library(name)
-
-    IS_RUST_LIBRARY = True
-
-
-RustLibrary('random-crate')
diff --git a/python/mozbuild/mozbuild/test/frontend/data/rust-library-invalid-crate-type/Cargo.toml b/python/mozbuild/mozbuild/test/frontend/data/rust-library-invalid-crate-type/Cargo.toml
deleted file mode 100644
index 26c653fdee..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/rust-library-invalid-crate-type/Cargo.toml
+++ /dev/null
@@ -1,15 +0,0 @@
-[package]
-name = "random-crate"
-version = "0.1.0"
-authors = [
-  "Nobody <nobody@mozilla.org>",
-]
-
-[lib]
-crate-type = ["dylib"]
-
-[profile.dev]
-panic = "abort"
-
-[profile.release]
-panic = "abort"
diff --git a/python/mozbuild/mozbuild/test/frontend/data/rust-library-invalid-crate-type/moz.build b/python/mozbuild/mozbuild/test/frontend/data/rust-library-invalid-crate-type/moz.build
deleted file mode 100644
index 01b3a35a73..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/rust-library-invalid-crate-type/moz.build
+++ /dev/null
@@ -1,18 +0,0 @@
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-@template
-def Library(name):
-    '''Template for libraries.'''
-    LIBRARY_NAME = name
-
-
-@template
-def RustLibrary(name):
-    '''Template for Rust libraries.'''
-    Library(name)
-
-    IS_RUST_LIBRARY = True
-
-
-RustLibrary('random-crate')
diff --git a/python/mozbuild/mozbuild/test/frontend/data/rust-library-name-mismatch/Cargo.toml b/python/mozbuild/mozbuild/test/frontend/data/rust-library-name-mismatch/Cargo.toml
deleted file mode 100644
index 41a9a7c8f6..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/rust-library-name-mismatch/Cargo.toml
+++ /dev/null
@@ -1,12 +0,0 @@
-[package]
-name = "deterministic-crate"
-version = "0.1.0"
-authors = [
-  "Nobody <nobody@mozilla.org>",
-]
-
-[profile.dev]
-panic = "abort"
-
-[profile.release]
-panic = "abort"
diff --git a/python/mozbuild/mozbuild/test/frontend/data/rust-library-name-mismatch/moz.build b/python/mozbuild/mozbuild/test/frontend/data/rust-library-name-mismatch/moz.build
deleted file mode 100644
index 01b3a35a73..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/rust-library-name-mismatch/moz.build
+++ /dev/null
@@ -1,18 +0,0 @@
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-@template
-def Library(name):
-    '''Template for libraries.'''
-    LIBRARY_NAME = name
-
-
-@template
-def RustLibrary(name):
-    '''Template for Rust libraries.'''
-    Library(name)
-
-    IS_RUST_LIBRARY = True
-
-
-RustLibrary('random-crate')
diff --git a/python/mozbuild/mozbuild/test/frontend/data/rust-library-no-cargo-toml/moz.build b/python/mozbuild/mozbuild/test/frontend/data/rust-library-no-cargo-toml/moz.build
deleted file mode 100644
index 01b3a35a73..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/rust-library-no-cargo-toml/moz.build
+++ /dev/null
@@ -1,18 +0,0 @@
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-@template
-def Library(name):
-    '''Template for libraries.'''
-    LIBRARY_NAME = name
-
-
-@template
-def RustLibrary(name):
-    '''Template for Rust libraries.'''
-    Library(name)
-
-    IS_RUST_LIBRARY = True
-
-
-RustLibrary('random-crate')
diff --git a/python/mozbuild/mozbuild/test/frontend/data/rust-library-no-lib-section/Cargo.toml b/python/mozbuild/mozbuild/test/frontend/data/rust-library-no-lib-section/Cargo.toml
deleted file mode 100644
index a20b19c628..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/rust-library-no-lib-section/Cargo.toml
+++ /dev/null
@@ -1,12 +0,0 @@
-[package]
-name = "random-crate"
-version = "0.1.0"
-authors = [
-  "Nobody <nobody@mozilla.org>",
-]
-
-[profile.dev]
-panic = "abort"
-
-[profile.release]
-panic = "abort"
diff --git a/python/mozbuild/mozbuild/test/frontend/data/rust-library-no-lib-section/moz.build b/python/mozbuild/mozbuild/test/frontend/data/rust-library-no-lib-section/moz.build
deleted file mode 100644
index 01b3a35a73..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/rust-library-no-lib-section/moz.build
+++ /dev/null
@@ -1,18 +0,0 @@
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-@template
-def Library(name):
-    '''Template for libraries.'''
-    LIBRARY_NAME = name
-
-
-@template
-def RustLibrary(name):
-    '''Template for Rust libraries.'''
-    Library(name)
-
-    IS_RUST_LIBRARY = True
-
-
-RustLibrary('random-crate')
diff --git a/python/mozbuild/mozbuild/test/frontend/data/rust-library-no-profile-section/Cargo.toml b/python/mozbuild/mozbuild/test/frontend/data/rust-library-no-profile-section/Cargo.toml
deleted file mode 100644
index 2700849dbb..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/rust-library-no-profile-section/Cargo.toml
+++ /dev/null
@@ -1,12 +0,0 @@
-[package]
-name = "random-crate"
-version = "0.1.0"
-authors = [
-  "Nobody <nobody@mozilla.org>",
-]
-
-[lib]
-crate-type = ["staticlib"]
-
-[profile.release]
-panic = "abort"
diff --git a/python/mozbuild/mozbuild/test/frontend/data/rust-library-no-profile-section/moz.build b/python/mozbuild/mozbuild/test/frontend/data/rust-library-no-profile-section/moz.build
deleted file mode 100644
index 01b3a35a73..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/rust-library-no-profile-section/moz.build
+++ /dev/null
@@ -1,18 +0,0 @@
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-@template
-def Library(name):
-    '''Template for libraries.'''
-    LIBRARY_NAME = name
-
-
-@template
-def RustLibrary(name):
-    '''Template for Rust libraries.'''
-    Library(name)
-
-    IS_RUST_LIBRARY = True
-
-
-RustLibrary('random-crate')
diff --git a/python/mozbuild/mozbuild/test/frontend/data/rust-library-non-abort-panic/Cargo.toml b/python/mozbuild/mozbuild/test/frontend/data/rust-library-non-abort-panic/Cargo.toml
deleted file mode 100644
index ccdd062431..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/rust-library-non-abort-panic/Cargo.toml
+++ /dev/null
@@ -1,14 +0,0 @@
-[package]
-name = "random-crate"
-version = "0.1.0"
-authors = [
-  "Nobody <nobody@mozilla.org>",
-]
-
-[lib]
-crate-type = ["staticlib"]
-
-[profile.dev]
-panic = "unwind"
-
-[profile.release]
diff --git a/python/mozbuild/mozbuild/test/frontend/data/rust-library-non-abort-panic/moz.build b/python/mozbuild/mozbuild/test/frontend/data/rust-library-non-abort-panic/moz.build
deleted file mode 100644
index d3896deccf..0000000000
--- a/python/mozbuild/mozbuild/test/frontend/data/rust-library-non-abort-panic/moz.build
+++ /dev/null
@@ -1,18 +0,0 @@
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-@template
-def Library(name):
-    '''Template for libraries.'''
-    LIBRARY_NAME = name
-
-
-@template
-def RustLibrary(name):
-    '''Template for Rust libraries.'''
-    Library(name)
-
-    IS_RUST_LIBRARY = True
-
-
-RustLibrary('random-crate')
\ No newline at end of file
diff --git a/python/mozbuild/mozbuild/test/frontend/test_emitter.py b/python/mozbuild/mozbuild/test/frontend/test_emitter.py
index 6ac4e0aac6..191727381d 100644
--- a/python/mozbuild/mozbuild/test/frontend/test_emitter.py
+++ b/python/mozbuild/mozbuild/test/frontend/test_emitter.py
@@ -31,7 +31,6 @@ from mozbuild.frontend.data import (
     LinkageMultipleRustLibrariesError,
     LocalInclude,
     Program,
-    RustLibrary,
     SdkFiles,
     SharedLibrary,
     SimpleProgram,
@@ -1021,78 +1020,6 @@ class TestEmitterBasic(unittest.TestCase):
              'Only source directory paths allowed in FINAL_TARGET_PP_FILES:'):
             self.read_topsrcdir(reader)
 
-    def test_rust_library_no_cargo_toml(self):
-        '''Test that defining a RustLibrary without a Cargo.toml fails.'''
-        reader = self.reader('rust-library-no-cargo-toml')
-        with self.assertRaisesRegexp(SandboxValidationError,
-             'No Cargo.toml file found'):
-            self.read_topsrcdir(reader)
-
-    def test_rust_library_name_mismatch(self):
-        '''Test that defining a RustLibrary that doesn't match Cargo.toml fails.'''
-        reader = self.reader('rust-library-name-mismatch')
-        with self.assertRaisesRegexp(SandboxValidationError,
-             'library.*does not match Cargo.toml-defined package'):
-            self.read_topsrcdir(reader)
-
-    def test_rust_library_no_lib_section(self):
-        '''Test that a RustLibrary Cargo.toml with no [lib] section fails.'''
-        reader = self.reader('rust-library-no-lib-section')
-        with self.assertRaisesRegexp(SandboxValidationError,
-             'Cargo.toml for.* has no \\[lib\\] section'):
-            self.read_topsrcdir(reader)
-
-    def test_rust_library_no_profile_section(self):
-        '''Test that a RustLibrary Cargo.toml with no [profile] section fails.'''
-        reader = self.reader('rust-library-no-profile-section')
-        with self.assertRaisesRegexp(SandboxValidationError,
-             'Cargo.toml for.* has no \\[profile\\.dev\\] section'):
-            self.read_topsrcdir(reader)
-
-    def test_rust_library_invalid_crate_type(self):
-        '''Test that a RustLibrary Cargo.toml has a permitted crate-type.'''
-        reader = self.reader('rust-library-invalid-crate-type')
-        with self.assertRaisesRegexp(SandboxValidationError,
-             'crate-type.* is not permitted'):
-            self.read_topsrcdir(reader)
-
-    def test_rust_library_non_abort_panic(self):
-        '''Test that a RustLibrary Cargo.toml has `panic = "abort" set'''
-        reader = self.reader('rust-library-non-abort-panic')
-        with self.assertRaisesRegexp(SandboxValidationError,
-             'does not specify `panic = "abort"`'):
-            self.read_topsrcdir(reader)
-
-    def test_rust_library_dash_folding(self):
-        '''Test that on-disk names of RustLibrary objects convert dashes to underscores.'''
-        reader = self.reader('rust-library-dash-folding',
-                             extra_substs=dict(RUST_TARGET='i686-pc-windows-msvc'))
-        objs = self.read_topsrcdir(reader)
-
-        self.assertEqual(len(objs), 1)
-        lib = objs[0]
-        self.assertIsInstance(lib, RustLibrary)
-        self.assertRegexpMatches(lib.lib_name, "random_crate")
-        self.assertRegexpMatches(lib.import_name, "random_crate")
-        self.assertRegexpMatches(lib.basename, "random-crate")
-
-    def test_multiple_rust_libraries(self):
-        '''Test that linking multiple Rust libraries throws an error'''
-        reader = self.reader('multiple-rust-libraries',
-                             extra_substs=dict(RUST_TARGET='i686-pc-windows-msvc'))
-        with self.assertRaisesRegexp(LinkageMultipleRustLibrariesError,
-             'Cannot link multiple Rust libraries'):
-            self.read_topsrcdir(reader)
-
-    def test_crate_dependency_path_resolution(self):
-        '''Test recursive dependencies resolve with the correct paths.'''
-        reader = self.reader('crate-dependency-path-resolution',
-                             extra_substs=dict(RUST_TARGET='i686-pc-windows-msvc'))
-        objs = self.read_topsrcdir(reader)
-
-        self.assertEqual(len(objs), 1)
-        self.assertIsInstance(objs[0], RustLibrary)
-
     def test_android_res_dirs(self):
         """Test that ANDROID_RES_DIRS works properly."""
         reader = self.reader('android-res-dirs')