# -*- mode: python; -*-
# Copyright 2008 Google Inc. All Rights Reserved.

# Use with
# subinclude('//java/com/google/clearsilver/jsilver/precompiler:compile_cs')

"""compile_cs build target

compile_cs(name, srcs)

This rule produces generated Java source code that represents JSilver Template
classes for rendering the given source CS files
It'll output one .java file for each .cs file.

Arguments

    * name: A unique name for this rule. (Name; required)
    * srcs: The list of cs files to pass to the code generator. (List of files,
            required)
"""

def compile_cs(name, srcs, mode='none'):
  if not srcs:
    raise BadRule(None, '%s: srcs is empty' % name)
  if mode == 'none':
    suffix = '.java'
  else:
    suffix = '_' + mode + '.java'
  gen_java_files = [ file.replace('.cs', suffix) for file in srcs]
  input_file = 'gen_cs_' + name + '.in'
  output_file = 'gen_cs_' + name + '.out'
  map_file = name + '.map' 
  genrule(name = 'gen_cs_' + name,
          srcs = srcs,
          outs = [ map_file ] + gen_java_files,
          deps = [
                   '//java/com/google/clearsilver/jsilver/precompiler:BatchCompiler',
                 ],
          cmd = (
              'echo "$(SRCS)" > $(@D)/' + input_file + ' && '
              'echo "$(OUTS)" > $(@D)/' + output_file + ' && '
              '//java/com/google/clearsilver/jsilver/precompiler:BatchCompiler '
              '--src_list_file=$(@D)/' + input_file + ' '
              '--out_list_file=$(@D)/' + output_file + ' '
              '--escape_mode=' + mode
            )
        )
  java_library(name = name,
               srcs = gen_java_files,
               resources = [ map_file ],
               deps = [ '//java/com/google/clearsilver/jsilver/compiler' ]
              )


"""join_compiled_cs build target

join_compiled_cs(name, deps)

This rule merges multiple compile_cs output libraries and maps into one Java
library and one map file that will be included as a system resource and can be
read into the binary that wants to load the compiled template classes.

Arguments

    * name: A unique name for this rule. (Name; required)
    * deps: The list of compile_cs BUILD targets to merge (List of labels,
            required)
"""

def join_compiled_cs(name, deps):
  if not deps:
    raise BadRule(None, '%s: deps is empty' % name)
  map_files = [ file + '.map' for file in deps]
  joined_map_file = name + '.map'
  genrule(name = 'gen_' + joined_map_file,
          srcs = map_files,
          outs = [ joined_map_file ],
          cmd = ('cat $(SRCS) > $@')
         )
  java_library(name = name,
               resources = [ joined_map_file ],
               deps = deps)