.dockerignore: !**/file doesn't work for selected inclusion

[rhaschke]

I followed the docs and setup my .dockerignore like this:

# ignore everything
*
# but include all package.xml in any folder
!**/package.xml

However, these files are not added to the context as expected. Seems like ** doesn't work for inclusion?
Explicitly adding those files works as expected.

Docker version 20.10.7, build 20.10.7-0ubuntu1~20.04.1

[thaJeztah]

Perhaps this is related to / may be resolved by #42758 and #42676

@aaronlehmann do you know?

[aaronlehmann]

Yes, I believe it would be resolved by merging #42758.

[dermasmid]

i'm having the same issue on Ubuntu, this is my .dockerignore

**/node_modules
**/dist
.git


!**/node_modules/@tw

this works fine on macos but does not work on Ubuntu
this is my docker version

Client:
 Version:           20.10.12
 API version:       1.41
 Go version:        go1.17.3
 Git commit:        20.10.12-0ubuntu4
 Built:             Mon Mar  7 17:10:06 2022
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server:
 Engine:
  Version:          20.10.12
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.17.3
  Git commit:       20.10.12-0ubuntu4
  Built:            Mon Mar  7 15:57:50 2022
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.5.9-0ubuntu3
  GitCommit:        
 runc:
  Version:          1.1.0-0ubuntu1
  GitCommit:        
 docker-init:
  Version:          0.19.0
  GitCommit:        

a fix for this will be much appreciated!

[thaJeztah]

I don't think the changes related to this are in the 20.10 releases, but will be in the upcoming 22.06 release (a first beta build has been released in the test channel on download.docker.com; https://github.com/moby/moby/releases/tag/v22.06.0-beta.0)

[MatthiasKunnen]

Potential duplicate of Exception patterns in .dockerignore do not support wildcard directories #30018?

Also part of [epic] builder: collected issues on improving .dockerignore #40319