Build dynamic framework with podspec for Objective-C API.

webrtc/build/ios/build_ios_framework.sh

Index: webrtc/build/ios/build_ios_framework.sh
diff --git a/webrtc/build/ios/build_ios_framework.sh b/webrtc/build/ios/build_ios_framework.sh
new file mode 100755
index 0000000000000000000000000000000000000000..3b45ad22b6325164e30fd462f5b3ed86cbd3a4c7
--- /dev/null
+++ b/webrtc/build/ios/build_ios_framework.sh
@@ -0,0 +1,60 @@
+#!/bin/bash
+
+#  Copyright 2015 The WebRTC project authors. All Rights Reserved.
+#
+#  Use of this source code is governed by a BSD-style license
+#  that can be found in the LICENSE file in the root of the source
+#  tree. An additional intellectual property rights grant can be found
+#  in the file PATENTS.  All contributing project authors may
+#  be found in the AUTHORS file in the root of the source tree.
+
+# Generates dynamic FAT framework for iOS in out_ios_framework.
+
+# Check for Darwin.
+if [[ ! $(uname) = "Darwin" ]]; then
+  echo "OS X required." >&2
+fi
+
+# Check for iOS library build script.
+SCRIPT_DIR=$(dirname $0)
+WEBRTC_BASE_DIR=${SCRIPT_DIR}/../../..
+BUILD_WEBRTC_SCRIPT=${WEBRTC_BASE_DIR}/webrtc/build/ios/build_ios_libs.sh
+if [[ ! -x ${BUILD_WEBRTC_SCRIPT} ]]; then
+  echo "Failed to find iOS library build script." >&2
+  exit 1
+fi
+# Check for flatten iOS headers script.
+FLATTEN_HEADERS_SCRIPT=${WEBRTC_BASE_DIR}/webrtc/build/ios/flatten_ios_headers.py
+if [[ ! -x ${FLATTEN_HEADERS_SCRIPT} ]]; then
+  echo "Failed to find flatten iOS headers script." >&2
+  exit 1
+fi
+
+pushd ${WEBRTC_BASE_DIR}
+
+# Build static libraries for iOS.
+${BUILD_WEBRTC_SCRIPT}

[tkchin_webrtc, 2016/03/23 17:52:55]

check for return code and exit if failure

[hjon_webrtc, 2016/03/25 00:09:46]

Done.

+
+# Flatten the directory structure for iOS headers.
+${FLATTEN_HEADERS_SCRIPT}

[tkchin_webrtc, 2016/03/23 17:52:55]

ditto

[hjon_webrtc, 2016/03/25 00:09:46]

Done.

+
+# Replace full paths for headers with framework paths.
+sed -E -i '' 's/"webrtc\/(api|base)\/objc\/(.*)"/<WebRTC\/\2>/g' out_ios_framework/include/*.h

[tkchin_webrtc, 2016/03/23 17:52:55]

This will be hard to maintain as we include more files.
Have a multiline sed instead
e.g. 
SED_PATTERN = "
  s/foo/bar/g;
  s/bar/baz/g;
"

sed ...

Also, to be conservative I would match on the $#import as well

[hjon_webrtc, 2016/03/25 00:09:46]

Done.

+
+# Build the framework.
+pushd webrtc/build/ios/webrtc/WebRTC
+xcodebuild -project WebRTC.xcodeproj -scheme WebRTC -configuration Release build
+xcodebuild -project WebRTC.xcodeproj -scheme WebRTC -destination 'platform=iOS Simulator,name=iPhone 6' -configuration Release build

[tkchin_webrtc, 2016/03/23 17:52:56]

nit: same order of arguments
Do these build both architectures (the first one is armv7/arm64, the second
i386/x86_64)?

[hjon_webrtc, 2016/03/25 00:09:46]

Done. Correct, the first builds armv7/arm64 and the second builds i386/x86_64. I
had hoped there would be a more convenient way to build the Simulator
architectures without specifying the name of the simulated device, but wasn't
able to find anything. As an example, there's a "generic/" specifier that can be
used, but it didn't seem to work for the Simulator builds, so it seems that's
only for physical device builds). There's also an -sdk flag, but xcodebuild
doesn't infer the destination from that (http://www.openradar.me/23973685).

It's unfortunate because I'd like to use something more future-proof than a
device name that will eventually have to change. :-/

+popd
+
+# Copy podspec and framework to out_ios_framework
+cp webrtc/build/ios/webrtc/WebRTC.podspec out_ios_framework/
+cp -R webrtc/build/ios/webrtc/WebRTC/build/Release-iphoneos/WebRTC.framework out_ios_framework/
+
+# Remove _CodeSignature for distribution
+rm -R out_ios_framework/WebRTC.framework/_CodeSignature

[tkchin_webrtc, 2016/03/23 17:52:56]

Does this work? Is code signature just that directory?

[hjon_webrtc, 2016/03/25 00:09:46]

From everything I've tested so far, it does seem to just be that directory and
removing it seems to be sufficient and work.

Edit: The above did seem to be true, but I found a way to simply not codesign
with xcodebuild, which seems to be a factor in achieving reproducible builds.

+
+# Combine multiple architectures
+lipo out_ios_framework/WebRTC.framework/WebRTC webrtc/build/ios/webrtc/WebRTC/build/Release-iphonesimulator/WebRTC.framework/WebRTC -create -output out_ios_framework/WebRTC.framework/WebRTC
+
+popd