Add mach build-stable to build with stable rustc

Github issue: #11806
Building with current stable rust (1.9.0) still fails because of
feature pragmas in some dependencies (e.g. serde_item).

1 files changed, 37 insertions, 0 deletions

diff --git a/python/servo/build_commands.py b/python/servo/build_commands.py
index 1d4931dc78c..f43f234a3a2 100644
--- a/python/servo/build_commands.py
+++ b/python/servo/build_commands.py
@@ -265,6 +265,43 @@ class MachCommands(CommandBase):
         print("Build completed in %s" % format_duration(elapsed))
         return status
 
+    @Command('build-stable',
+             description='Build Servo using stable rustc',
+             category='build')
+    @CommandArgument('--target', '-t',
+                     default=None,
+                     help='Cross compile for given target platform')
+    @CommandArgument('--release', '-r',
+                     action='store_true',
+                     help='Build in release mode')
+    @CommandArgument('--dev', '-d',
+                     action='store_true',
+                     help='Build in development mode')
+    @CommandArgument('--jobs', '-j',
+                     default=None,
+                     help='Number of jobs to run in parallel')
+    @CommandArgument('--features',
+                     default=None,
+                     help='Space-separated list of features to also build',
+                     nargs='+')
+    @CommandArgument('--android',
+                     default=None,
+                     action='store_true',
+                     help='Build for Android')
+    @CommandArgument('--debug-mozjs',
+                     default=None,
+                     action='store_true',
+                     help='Enable debug assertions in mozjs')
+    @CommandArgument('--verbose', '-v',
+                     action='store_true',
+                     help='Print verbose output')
+    @CommandArgument('params', nargs='...',
+                     help="Command-line arguments to be passed through to Cargo")
+    def build_stable(self, target=None, release=False, dev=False, jobs=None,
+                     features=None, android=None, verbose=False, debug_mozjs=False, params=None):
+        self.set_use_stable_rust()
+        self.build(target, release, dev, jobs, features, android, verbose, debug_mozjs, params)
+
     @Command('build-cef',
              description='Build the Chromium Embedding Framework library',
              category='build')