how do i check the presence of a file in a container | Dagger | Page 1

trail nexus Aug 28, 2024, 7:52 PM

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Hi Folks

whats the best way to check if a file is present in a container ?

Thanks

rose grotto Aug 28, 2024, 8:06 PM

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trail nexus Hi Folks whats the best way to check if a file is present in a container ? Tha...

👋 File("/tmp/foo").Size(ctx) This returns an error if the file doesn't exit

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also keep an eye on this: https://github.com/dagger/dagger/issues/6713

GitHub

Check if a file or directory exists · Issue #6713 · dagger/dagger

Problem The Dagger API does not support checking if a file exists. There is an SDK-specific workaround (maybe? not documented) which is to 1) call any function that requires the file to exist, like...

trail nexus Aug 30, 2024, 12:39 AM

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📎 main.go

trail nexus Aug 30, 2024, 12:39 AM

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rose grotto 👋 `File("/tmp/foo").Size(ctx)` This returns an error if the file doesn't exit

i am trying to see if the file exist as per your suggestion using size and Sync . both of these result in the pipeline failing if the file does not exist which was not my expectation

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i want to continue exeting if the actual file is missing. is that possible ?

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✔ connect 0.4s
✔ initialize 3.3s
✔ prepare 0.0s
✔ tester: Tester! 0.0s
✘ Tester.buildTools: Container! 0.7s
! call function "BuildTools": process "/runtime" did not complete successfully: exit code: 2
┃ file exist false                                                                                                                                                                                                                                              
┃ file exist false                                                                                                                                                                                                                                              
┃ marshal: json: error calling MarshalJSON for type *dagger.Container: input: container.from.withMountedCache.withEnvVariable.withExec.directory resolve: /t3dp/app/latest: cannot retrieve path from cache                                                     
  ✔ Container.from(address: "alpine:latest"): Container! 0.2s
  ✘ Container.file(path: "/t3dp/app/latest"): File! 0.0s
  ! /t3dp/app/latest: cannot retrieve path from cache
  ✘ Container.file(path: "/t3dp/app/latest"): File! 0.0s
  ! /t3dp/app/latest: cannot retrieve path from cache
  ✘ Container.directory(path: "/t3dp/app/latest"): Directory! 0.0s
  ! /t3dp/app/latest: cannot retrieve path from cache

here is the error

trail nexus Aug 30, 2024, 1:16 AM

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starting to get it .... i cant do that on a mounted volume .. <facepalm/>

#how do i check the presence of a file in a container