Support hot reloading with Inject

[mplorentz]

Description

This adds a framework for hot reloading to Nos. I tried it out in my hackathon project and thought it might be useful as a faster, more reliable alternative to SwiftUI previews.

How to test

1. Follow the new instructions to set up hot reloading in the CONTRIBUTING.md.
2. Run the Nos scheme in the simulator.
3. (Optional) open the console log and filter it by "💉" to see the Inject logs. If you set it up correctly you should see something like:

💉 InjectionIII connected /Users/matt/v/nos/Nos.xcodeproj
💉 Watching files under the directory /Users/matt/v/nos`

If not, maybe you need to watch the correct directory from the InjectionIII menubar app.

5. Open HomeFeedView
6. Change the background color to something bright like red
7. Hit command-s to save. You should see Inject recompile the file in the logs
8. For some reason our views don't update right away, but if you tap another tab and then tap the home tab again the background color should change.

Screenshots/Video

(ignore the fact that in the video the simulator is showing my hackathon branch)

Screen.Recording.2024-12-27.at.10.00.28.AM.mov

[mplorentz]

shoot this is on the wrong branch. I will have to fix it later.

[mplorentz]

Maybe this documentation is too light, but I am kinda rushing to throw this PR out there. Maybe the reviewer can tell me if it's enough or document the steps they had to take.

For instance, the first thing their documentation says to do is add some linker flags which is already done. So at least that part is superfluous. It's been a while since I set this up so I don't remember what I did exactly.

[pelumy]

👀

[pelumy]

I need to download Xcode from the App Store to continue testing this. I currently have the one from the "Xcodes app". I will pause testing this to download Xcode from the App Store over the weekend. I can do that now if it is very much important. But I will need to delete my current Xcode tho download that because of space issues and that can delay me doing other things.

[pelumy]

I continued to test this today, I didn't need to do anything extra-ordinary in the documentation linked. I only had to install inject and then run the project from Xcode. I searched the logs and found what Matt asked us to search, only issue I was getting was:
💉 💉 ⚠️ Your project file seems to be in the Desktop or Documents folder and may prevent InjectionIII working as it has special permissions.

I did some googling and saw that people were experiencing it too and it was due to permission issues. I tried to give Injection permission to read my files, but that was impossible. I saw online that it would work if I moved the nos folder directly to desktop. I tried to move the folder but I was getting some errors. I will have to reclone again to see if that would work.

[pelumy]

It worked after I moved the nos folder to my desktop and it wasn't nested in another folder. I was able to see the background color of the home view change after selecting another tab and going back to the home tab.

[pelumy]

This works for me. Thanks for working on this @mplorentz

[pelumy]

💉

[mplorentz]

@pelumy

I need to download Xcode from the App Store to continue testing this. I currently have the one from the "Xcodes app". I will pause testing this to download Xcode from the App Store over the weekend. I can do that now if it is very much important. But I will need to delete my current Xcode tho download that because of space issues and that can delay me doing other things.

I actually fixed this by creating a symbolic link from /Applications/Xcode 16.0.app -> /Applications/Xcode.app like this: sudo ln -s "/Applications/Xcode 16.0.app" "/Applications/Xcode.app".

But you can also install the App Store version of Xcode alongside the one from Xcodes.app. And you can have multiple versions from Xcodes.app isntalled at the same time too. They all work side by side, I just try not to have them launched at the same time.