Fix loader error with different build syntax

[vdemeester]

build: . was not working anymore. Fixing this by adding a new
tranform function for BuildConfig.

/cc @cdrage

Signed-off-by: Vincent Demeester vincent@sbr.pm

[codecov-io]

Codecov Report

Merging #544 into master will increase coverage by <.01%.
The diff coverage is 77.77%.

@@            Coverage Diff             @@
##           master     #544      +/-   ##
==========================================
+ Coverage   49.06%   49.07%   +<.01%     
==========================================
  Files         200      200              
  Lines       16438    16447       +9     
==========================================
+ Hits         8066     8072       +6     
- Misses       7952     7955       +3     
  Partials      420      420

[thaJeztah]

Do we know where it broke, and if this needs to be back ported?

[vdemeester]

@thaJeztah from #481. As we don't load it anyway in docker/cli we don't fails there. But using it as a lib, it fails 😓

[cdrage]

@vdemeester kinda odd since build is yet to be supported in docker/cli compose, right? or did I miss a recent commit?

[thaJeztah]

LGTM

[vdemeester]

@cdrage it's just that your PR didn't take into account Load and thus didn't take into account that both things below works 👼. I missed that when reviewing the first one 👼

build: .
build:
  context: .
  dockerfile: foo.dockerfile

[cdrage]

@vdemeester Doh. I forgot about that too.

Thanks for the fix 👍

[dnephin]

LGTM