cmd/gomobile: produce frameworks which follow Apple's specs per platform, fixing Xcode 15.3 compatibility issues

This patch updates the framework generation code to follow the Apple spec for placing content:
https://developer.apple.com/documentation/bundleresources/placing_content_in_a_bundle

Previously, we setup the framework in MacOS format, and used symlinks to make it compatible with iOS format. This approach no longer works (it works locally in simulator, but causes signing issues when attempting to upload apps for distribution, or running on real hardware). We now setup the expected bundle format for each platform.

Other benefits:

 - Thirds the size of the xcframework and resulting app binary when distributing the xcframework by zip (common for SPM and other formats). The symlinks resulted in duplicate files after zipping, which made it into the final app.
 - Set MinimumOSVersion, fixing SPM compatibility issue
 - Eliminates the blank Info.plist
 - Initial testing shows this also fixes golang/go#66406 (code signing issues) as a side effect of using the proper format

Testing:

 - Tested all 4 platforms (iOS, simulator, macOS, Catalyst) on Xcode 15.3

Fixes golang/go#66406
Fixes golang/go#66500

Change-Id: I8538989efe67cb0d2d0496087dcbeca923c3dffe
GitHub-Last-Rev: 28dca85888bedcc5eb44d3c74af6b88cf5121914
GitHub-Pull-Request: golang/mobile#98
Reviewed-on: https://go-review.googlesource.com/c/mobile/+/574055
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Hajime Hoshi <hajimehoshi@gmail.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
1 file changed
tree: 9b7cb1a5c069d9b0e80cee4811680cdd08cfdf46
  1. app/
  2. asset/
  3. bind/
  4. cmd/
  5. doc/
  6. event/
  7. example/
  8. exp/
  9. geom/
  10. gl/
  11. internal/
  12. testdata/
  13. .gitattributes
  14. .gitignore
  15. codereview.cfg
  16. CONTRIBUTING.md
  17. go.mod
  18. go.sum
  19. LICENSE
  20. PATENTS
  21. README.md
README.md

Go support for Mobile devices

Go Reference

The Go mobile repository holds packages and build tools for using Go on mobile platforms.

Package documentation as a starting point:

Caution image

The Go Mobile project is experimental. Use this at your own risk. While we are working hard to improve it, neither Google nor the Go team can provide end-user support.

This is early work and installing the build system requires Go 1.5. Follow the instructions on golang.org/wiki/Mobile to install the gomobile command, build the basic and the bind example apps.


Contributions to Go are appreciated. See https://golang.org/doc/contribute.html.