apollo-ios: Random compile errors in Xcode 13 generating the API file

Bug report

This is a very weird issue that seems to have recently started for us in Xcode 13. I’m, honestly not sure if this is an Xcode issue or Apollo, but wanted to check here first. Randomly, when building the project we get a compile failure on the autogenerated API file.

error: input file '~/.../API.swift' was modified during the build

I can switch back to Xcode 12 and everything builds correctly. We have changed nothing in our setup, other than trying out the Xcode 13 beta. If I completely remove the build phase to generate the API file then the project builds normally without any issues, since it is not modifying the API file.

Versions

Please fill in the versions you’re currently using:

apollo-ios SDK version: 0.39.0
Xcode version: 13 beta 5
Swift version: 5.5 (also same issue using 5.4)
Package manager: SPM

Steps to reproduce

Open project in Xcode 13 and build.

About this issue

Original URL
State: closed
Created 3 years ago
Comments: 18 (8 by maintainers)

Most upvoted comments

I also had this issue and this answer on StackOverflow resolved it.

Essentially added this line at the beginning of the build phase script:

if [ $ACTION = "indexbuild" ]; then exit 0; fi

filipe-lemos on Oct 11, 2021

I’m still having this issue with Xcode 13 final release 😞

pakerwreah on Sep 23, 2021

@andyx227 If my understanding is correct, checking “install builds only” means that it will only ever run when doing a Product > Archive. This is likely not the desired behaviour. We want it to run anytime a build is performed and there are changes in the input graphql and/or schema files.

aerickson14 on Oct 5, 2021

Thanks for this level of detail @Ded77 - I’ll keep trying to reproduce.

calvincestari on Sep 16, 2021

I have the same error for me with Xcode 13 RC 😕 Any updates about the Xcode possible bug with build phases order ?

Ded77 on Sep 15, 2021

Hi @calvincestari and @AnthonyMDev, we are definitely performing this build phase before the compile phase. I did not notice this with previous beta versions. I have also submitted feedback to Apple on this, FB9565079, but also wanted to check here to make sure that I wasn’t missing anything. 🙂

Hopefully the next Xcode beta fixes this. 🤞

I’ll close this for now and then reach out again if I get more details on what is happening.

donnywdavis on Aug 26, 2021

I’ve still not managed to replicate this issue but some suggestions are:

Remove the build phase and switch to a manual codegen step.
Add an additional build phase before codegen to remove any existing generated files.

I realize neither of these are ideal nor solve the root issue but if this is becoming a bottleneck to productivity they may be worth trying.

calvincestari on Oct 1, 2021

I faced this yesterday with 0.49.1 (both cli & apollo) Though it is quite random… Now it works after few compiles…

piv199 on Oct 1, 2021

Hi @Ded77 - I haven’t tried with the Release Candidate build yet. I will do so today and see if I can reproduce.

calvincestari on Sep 15, 2021