BuildKit frontend for building buildpacks directly.
Add # syntax = tonistiigi/pack as the first line of a file (eg. manifest.yml):
docker build -f manifest.yml .
buildctl build --frontend=gateway.v0 --opt source=tonistiigi/pack --local context=.
Detection can be enabled with skipDetect=true. Custom buildpacks can be set in manifest.yml or passed with buildpackOrder=url.
> git clone git://github.com/ihuston/python-cf-examples.git
> cd python-cf-examples/01-simple-python-app
> tmp=$(mktemp); ( echo "# syntax = tonistiigi/pack" ; cat manifest.yml ) > $tmp && mv $tmp manifest.yml
> docker build -t pythonapp -f manifest.yml .
[+] Building 89.4s (16/16) FINISHED
....
=> => writing image sha256:1e13eb221e7779c8aa65624b97afcc11ee797d3c09d80dcfc1e55d956d467d39 0.0s
=> => naming to docker.io/library/pythonapp 0.0s
> docker run -d -p 8080:8080 pythonapp
> curl localhost:8080
Hello World! I am instance 0
> git clone git://github.com/cloudfoundry/go-buildpack
> cd go-buildpack/fixtures/go_app/
> tmp=$(mktemp); ( echo "# syntax = tonistiigi/pack" ; cat Procfile ) > $tmp && mv $tmp Procfile
> docker build -t goapp -f Procfile .
[+] Building 28.9s (16/16) FINISHED
...
=> => writing image sha256:f0d240bed9a2b12b288845c3a305050c8d9fa035f564d057e95b0714f68363f2 0.0s
=> => naming to docker.io/library/goapp 0.0s
> docker run -d -p 8080:8080 goapp
> curl localhost:8080
go, world
.
.