PowerShell script to clean up docker images from a list of images. Use `docker image prune` for the built-in functionality.

gistfile1.txt

docker images | Select-String -Pattern ' (?<sha>\b[a-zA-Z0-9]{12})\b ' | foreach {docker rmi --force $_.Matches.Groups[1].Value}

NOTE: you may have to run this multiple times if you have child images, depending on the order they are removed.. Child images will be removed on the first run, their parents on the second run, and so on.

--force forces removal of an image.

The regex finds a 12 char sha, with a space on either side. (this may have a collision with tags that are 12 chars; projects only have a space after and should be safe.)

If a match is found, we grab the first group's (<sha>) value, which ignores the spaces we are looking for on either side of the group.