[core] don't rebuild shaders unless they change

1 files changed, 16 insertions, 18 deletions

diff --git a/gyp/shaders.gypi b/gyp/shaders.gypi
index 8004874376..83d40a52f9 100644
--- a/gyp/shaders.gypi
+++ b/gyp/shaders.gypi
@@ -4,31 +4,29 @@
       'target_name': 'shaders',
       'type': 'none',
       'hard_dependency': 1,
-      'actions': [
+
+      'sources': [
+        '<!@(find ../src/mbgl/shader -name "*.glsl")'
+      ],
+
+      'rules': [
         {
-          'action_name': 'Build Shaders',
-          'inputs': [
-            '../scripts/build-shaders.py',
-            '<!@(find ../src -name "*.glsl")'
-          ],
-          'outputs': [
-            '<(SHARED_INTERMEDIATE_DIR)/include/mbgl/shader/shaders.hpp',
-            '<(SHARED_INTERMEDIATE_DIR)/src/shader/shaders_gl.cpp',
-            '<(SHARED_INTERMEDIATE_DIR)/src/shader/shaders_gles2.cpp',
-          ],
-          'action': ['../scripts/build-shaders.py', '<(SHARED_INTERMEDIATE_DIR)', '<@(_inputs)'],
+          'rule_name': 'Build Shaders',
+          'message': 'Building shader',
+          'extension': 'glsl',
+          'inputs': [ '../scripts/build-shaders.py' ],
+          'outputs': [ '<(SHARED_INTERMEDIATE_DIR)/include/mbgl/shader/<(RULE_INPUT_ROOT).hpp' ],
+          'action': [ '../scripts/build-shaders.py', '<(RULE_INPUT_PATH)', '<(SHARED_INTERMEDIATE_DIR)/include/mbgl/shader/<(RULE_INPUT_ROOT).hpp' ],
+          'process_outputs_as_sources': 1,
         }
       ],
+
       'direct_dependent_settings': {
-        'sources': [
-            '<(SHARED_INTERMEDIATE_DIR)/include/mbgl/shader/shaders.hpp',
-            '<(SHARED_INTERMEDIATE_DIR)/src/shader/shaders_gl.cpp',
-            '<(SHARED_INTERMEDIATE_DIR)/src/shader/shaders_gles2.cpp'
-        ],
         'include_dirs': [
-          '<(SHARED_INTERMEDIATE_DIR)/include/',
+          '<(SHARED_INTERMEDIATE_DIR)/include',
         ]
       }
+
     },
   ]
 }