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      1 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 
      5 # This file is meant to be included into a target to provide a rule
      6 # to invoke protoc in a consistent manner. This is only to be included
      7 # for Java targets. When including this file, a .jar-file will be generated.
      8 # For other targets, see protoc.gypi.
      9 #
     10 # To use this, create a gyp target with the following form:
     11 # {
     12 #   'target_name': 'my_proto_lib',
     13 #   'sources': [
     14 #     'foo.proto',
     15 #     'bar.proto',
     16 #   ],
     17 #   'variables': {
     18 #     'proto_in_dir': '.'
     19 #   },
     20 #   'includes': ['path/to/this/gypi/file'],
     21 # }
     22 #
     23 # The 'proto_in_dir' variable must be the relative path to the
     24 # directory containing the .proto files.  If left out, it defaults to '.'.
     25 #
     26 # The 'output_java_files' variable specifies a list of output files that will
     27 # be generated. It is based on the package and java_outer_classname fields in
     28 # the proto. All the values must be prefixed with >(java_out_dir), since that
     29 # is the root directory of all the output.
     30 #
     31 # Implementation notes:
     32 # A target_name of foo and proto-specified 'package' java.package.path produces:
     33 #   <(PRODUCT_DIR)/java_proto/foo/{java/package/path/}{Foo,Bar}.java
     34 # where Foo and Bar are taken from 'java_outer_classname' of the protos.
     35 #
     36 # How the .jar-file is created is different than how protoc is used for other
     37 # targets, and as such, this lives in its own file.
     38 
     39 {
     40   'variables': {
     41     'protoc': '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)android_protoc<(EXECUTABLE_SUFFIX)',
     42     'java_out_dir': '<(PRODUCT_DIR)/java_proto/<(_target_name)/src',
     43     'proto_in_dir%': '.',
     44     'stamp_file': '<(java_out_dir).stamp',
     45     'script': '<(DEPTH)/build/protoc_java.py',
     46 
     47     # The rest of the variables here are for the java.gypi include.
     48     'java_in_dir': '<(DEPTH)/build/android/empty',
     49     'generated_src_dirs': ['<(java_out_dir)'],
     50     # Adding the |stamp_file| to |additional_input_paths| makes the actions in
     51     # the include of java.gypi depend on the genproto_java action.
     52     'additional_input_paths': ['<(stamp_file)'],
     53   },
     54   'actions': [
     55     {
     56       'action_name': 'genproto_java',
     57       'inputs': [
     58         '<(script)',
     59         '<(protoc)',
     60         '<@(_sources)',
     61       ],
     62       # We do not know the names of the generated files, so we use a stamp.
     63       'outputs': [
     64         '<(stamp_file)',
     65       ],
     66       'action': [
     67         '<(script)',
     68         '<(protoc)',
     69         '<(proto_in_dir)',
     70         '<(java_out_dir)',
     71         '<(stamp_file)',
     72         '<@(_sources)',
     73       ],
     74       'message': 'Generating Java code from protobuf files in <(proto_in_dir)',
     75     },
     76   ],
     77   'dependencies': [
     78     '<(DEPTH)/third_party/android_protobuf/android_protobuf.gyp:android_protoc#host',
     79     '<(DEPTH)/third_party/android_protobuf/android_protobuf.gyp:protobuf_nano_javalib',
     80   ],
     81   'includes': [ 'java.gypi' ],
     82 }
     83