Podspecs for Protoc and the gRPC plugin
The examples under <repo_root>/examples now rely on the released
versions. Those under src/objective-c/examples, as well as the tests,
rely on protoc and the plugin as compiled from head.
diff --git "a/src/objective-c/\041ProtoCompiler.podspec" "b/src/objective-c/\041ProtoCompiler.podspec"
new file mode 100644
index 0000000..f78d3c0
--- /dev/null
+++ "b/src/objective-c/\041ProtoCompiler.podspec"
@@ -0,0 +1,87 @@
+# 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