#16999 Write metadata about packaged docker image to dist/ Issue created by huonw Is your feature request related to a problem? Please describe. Currently there doesn't seem to be an easy way to determine info about a docker image that was built via

./pants package some/path:some_docker_image

(and/or published via

./pants publish ...

). This is unfortunate when the image repositories and/or tags are dynamic, or if one wants to use the image ID. In particular, machine use of this info (e.g. using it in terraform/cloudformation/... templates) seems to require parsing the human-focused output of the pants commands. There's currently no record of a docker image being packaged in

dist/

, since the image itself is managed/stored by docker itself. This was discussed in slack at https://pantsbuild.slack.com/archives/C046T6T9U/p1663916571660779. Describe the solution you'd like There was a suggestion of writing out a JSON file like

dist/some.path/some_docker_image.docker_info.json

that contains metadata about the image, effectively acting as a "link" to the compiled artefact. For example:

{
    "repositories": ["example.repo"]
    "image_tags": ["pants-hash-123456789", "latest"]
    "image_id": "1234567890"
}

Questions: • should this be versioned somehow? • anything else to include? • is there a different format that may work better? (e.g. I imagine it may be common to want to use a shell script to interpret this output) Describe alternatives you've considered None, yet. Additional context #14657 may be tangentially related, since I could imagine it may result in layers being written out to

dist/

(maybe?). pantsbuild/pants

#16999 Write metadata about packaged docker image to dist/ Issue closed as completed by kaos pantsbuild/pants