build: fix build failure in context of node module

Building Shaka Player after installing it via node currently results
in a build failure.  This is because stylelint wants to filter out any
sources that match the glob **/node_modules/**, which in that context
is all of our sources.

To fix the failure, we add the --disable-default-ignores flag to the
stylelint command line.

We also had a similar hard-coded exclusion in build.py, which is now
fixed, as well.

Change-Id: I33f6619ebaccce1e1efa5da68e31cd49036addcd

build/build.py

@@ -291,8 +291,12 @@ def build_library(self, name, locales, force, is_debug):
     if not closure.compile(closure_opts, force):
       return False
 
-    # Don't pass node modules to the extern generator.
-    local_include = set([f for f in self.include if 'node_modules' not in f])
+    # Don't pass local node modules to the extern generator.  But don't simply
+    # exclude the string 'node_modules', either, since Shaka Player could be
+    # rebuilt after installing it as a node module.
+    node_modules_path = os.path.join(
+        shakaBuildHelpers.get_source_base(), 'node_modules')
+    local_include = set([f for f in self.include if node_modules_path not in f])
     extern_generator = compiler.ExternGenerator(local_include, build_name)
 
     if not extern_generator.generate(force):

build/compiler.py

@@ -359,7 +359,14 @@ def lint(self, fix=False, force=False):
       return True
 
     stylelint = shakaBuildHelpers.get_node_binary('stylelint')
-    cmd_line = stylelint + ['--config', self.config_path] + self.source_files
+    cmd_line = stylelint + [
+        '--config', self.config_path,
+        # The "default ignores" is something like **/node_modules/**, which
+        # means that if we run the build scripts from inside the installed node
+        # modules of shaka-player, all our sources will be filtered out if we
+        # don't disable the default ignores in stylelint.
+        '--disable-default-ignores',
+    ] + self.source_files
 
     if fix:
       cmd_line += ['--fix']