src/objective-c/!ProtoCompiler.podspec

# Proto Compiler CocoaPods podspec

# Copyright 2016, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
#     * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Pod::Spec.new do |s|
  # This pod is only a utility that will be used by other pods _at install time_ (not at compile
  # time). Other pods can access it in their `prepare_command` script, under <pods_root>/<pod name>.
  # Because CocoaPods installs pods in alphabetical order, beginning this pod's name with an
  # exclamation mark ensures that other "regular" pods will be able to find it as it'll be installed
  # before them.
  s.name     = '!ProtoCompiler'
  v = '3.0.0-beta-3.1'
  s.version  = v
  s.summary  = 'The Protobuf Compiler (protoc) generates Objective-C files from .proto files'
  s.description = <<-DESC
    This podspec only downloads protoc so that local pods generating protos can execute it as part
    of their prepare_command.
    The generated code will have a dependency on the Protobuf Objective-C runtime of the same
    version. The runtime can be obtained as the "Protobuf" pod.
  DESC
  s.homepage = 'https://github.com/google/protobuf'
  s.license  = 'New BSD'
  # "The name and email addresses of the library maintainers, not the Podspec maintainer."
  s.authors  = { 'The Protocol Buffers contributors' => 'protobuf@googlegroups.com' }

  repo = 'google/protobuf'
  release = "v#{v}"
  file = "protoc-#{v}-osx-x86_64.zip"
  s.source = {
    :http => "https://github.com/#{repo}/releases/download/#{release}/#{file}",
    # TODO(jcanizales): Add sha1 or sha256
    # :sha1 => '??',
  }

  s.preserve_paths = 'protoc',
                     'google/**/*.proto' # Well-known protobuf types

  # Restrict the protobuf runtime version to the one supported by this version of protoc.
  s.dependency 'Protobuf', v

  # This is only for local development of protoc: If the Podfile brings this pod from a local
  # directory using `:path`, CocoaPods won't download the zip file and so the compiler won't be
  # present in this pod's directory. We use that knowledge to check for the existence of the file
  # and, if absent, build it from the local sources.
  repo_root = '../..'
  plugin = 'grpc_objective_c_plugin'
  s.prepare_command = <<-CMD
    if [ ! -f protoc ]; then
      cd #{repo_root}
      # This will build protoc from the Protobuf submodule of gRPC, and put it in
      # #{repo_root}/bins/opt/protobuf.
      #
      # TODO(jcanizales): Make won't build protoc from sources if one's locally installed, which
      # _we do not want_. Find a way for this to always build from source.
      make #{plugin}
      cd -
    fi
  CMD

end