Match docker 1.11 generated image IDs

[aluki]

I'm getting this error when trying to use the post processor:

• Post-processor failed: Could not parse docker build output: sha256:7d57f6744acb75e0a5ad3939844d5970604b60940d016bb4a540a44eeafea8a7

Looks like the "docker build" command has changed the message it shows after building the image. So I've tried with a new regexp. I used (?:sha256:)? to match image ids composed only of hexadecimal digits. It is only a safety measure... I haven't tested it with previous versions of docker.

This change works for me with docker 1.11.0:

==> docker: Running post-processor: docker-dockerfile
docker (docker-dockerfile): Base image ID: sha256:c3949b417727055a20c1ea7e143172b30f467ca80e051cebf9781bbf711c2c03
docker (docker-dockerfile): Image ID: sha256:7f539c23418e440ad64a78d564f8073f5a563843beaf1a36435fde27afca032a

[gregorskii]

+1 this is an issue for me.

Docker: Version 1.12.0-a (build: 11213)

Adding the above fix does not appear to fix it:

Build 'docker' errored: 2 error(s) occurred:

* Post-processor failed: Could not parse `docker build` output: sha256:8e752a3a8e9002cc4c4ee05ae5d79e292d7e22c0d4e965d0cd76f4fc9bfd96d9

* Error destroying builder artifact: reading body [pos 352]: cannot decode non-nil codec value into nil error (1 methods)

==> Some builds didn't complete successfully and had errors:
--> docker: 2 error(s) occurred:

* Post-processor failed: Could not parse `docker build` output: sha256:8e752a3a8e9002cc4c4ee05ae5d79e292d7e22c0d4e965d0cd76f4fc9bfd96d9

* Error destroying builder artifact: reading body [pos 352]: cannot decode non-nil codec value into nil error (1 methods)

==> Builds finished but no artifacts were created.

[gregorskii]

Actually this works for me if I edit the file in the GOPATH after running go get.

Must be my misunderstanding of GO, but this was the process I did:

git clone git@github.com:jgkim/packer-post-processor-docker-dockerfile.git
cd packer-post-process-docker-dockerfile
go get -d ./...
go build

Any edits to the files in the checked out path were not applied on go build. I had to edit the files in the GOPATH:

export GOPATH="$HOME/go/jgkim..."

[abessifi]

+1