Proof-of-concept: https://codereview.chromium.org/1827103005

The proof-of-concept CL is ugly. It hardcodes too much (assumes that all create_bundle are executables, assumes that all projects are for iOS, ...), uses too much memory (lots of strings copied, ...), duplicate too much code (need to be refactored), has no comments, ... but it allows me to build and run targets for simulator from Xcode with a project generated via "gn gen --ide=xcode".

See attached screenshot if you are interested.

Deleted: 7WbpF2m5VmJ.png 893 KB

	7WbpF2m5VmJ.png 893 KB View Download

 Issue 593581  has been merged into this issue.

 Issue 305767  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/6ee04b5ce48981fd997b94c58240602df1a329d6

commit 6ee04b5ce48981fd997b94c58240602df1a329d6
Author: sdefresne <sdefresne@chromium.org>
Date: Tue May 03 22:20:10 2016

[GN] Add support for generating Xcode projects.

tools/gn/xcode_object.{cc,h}

  Implements a class hierarchy mimicking the structure of an Xcode
  pbxproj file with methods to dump them as text file.

tools/gn/xcode_writer.{cc,h}

  Implements generation of Xcode project structure from GN settings
  and for dumping the output to pbxproj and xcworkspacedata files.

tools/gn/*

  Add product_type field to create_bundle target. This is used when
  generating the Xcode project file to use the correct product type
  in Xcode.

  Fix a minor DCHECK failure in create_bundle_target_generator.cc.

build/config/compiler/BUILD.gn

  Remove -fdebug-prefix-map from the clang command-line as it does
  not work with Xcode (and is unnecessary as the path given to the
  compiler are relative already).

  With this flag, Xcode cannot find the source file when debbugging
  the application, without it breakpoint and displaying code work.

BUG= 597975 

Review-Url: https://codereview.chromium.org/1827103005
Cr-Commit-Position: refs/heads/master@{#391377}

[modify] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/build/config/compiler/BUILD.gn
[modify] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/build/config/ios/rules.gni
[modify] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/tools/gn/BUILD.gn
[add] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/tools/gn/DEPS
[modify] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/tools/gn/bundle_data.h
[modify] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/tools/gn/command_gen.cc
[modify] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/tools/gn/commands.cc
[modify] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/tools/gn/commands.h
[modify] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/tools/gn/create_bundle_target_generator.cc
[modify] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/tools/gn/functions_target.cc
[modify] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/tools/gn/gn.gyp
[modify] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/tools/gn/variables.cc
[modify] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/tools/gn/variables.h
[modify] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/tools/gn/visual_studio_writer.cc
[add] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/tools/gn/xcode_object.cc
[add] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/tools/gn/xcode_object.h
[add] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/tools/gn/xcode_writer.cc
[add] https://crrev.com/6ee04b5ce48981fd997b94c58240602df1a329d6/tools/gn/xcode_writer.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/27e8737ee5fbc9cf0b8a2d4a2076cd07030f7096

commit 27e8737ee5fbc9cf0b8a2d4a2076cd07030f7096
Author: sdefresne <sdefresne@chromium.org>
Date: Tue May 17 14:02:36 2016

[GN] Cleanup workaround in build/config/ios/rules.gni.

Remove workaround in build/config/ios/rules.gni now that gn has
been rolled to include support for product_type property.

BUG= 597975 

Review-Url: https://codereview.chromium.org/1948753002
Cr-Commit-Position: refs/heads/master@{#394116}

[modify] https://crrev.com/27e8737ee5fbc9cf0b8a2d4a2076cd07030f7096/build/config/ios/rules.gni