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neilmacneil123/dockerfile-command

Forked from maxweisspoker/dockerfile-command
Created October 8, 2023 02:10
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Bash alias to print "Dockerfile" for image by using sed with "docker history"
Raw
dockerfile-command
alias dockerfile='script.sh'
script.sh:
#!/bin/bash
echo "FROM scratch"
docker history --no-trunc $@ | tac | tr -s ' ' | cut -d " " -f 5- | sed 's,^/bin/sh -c #(nop) ,,g' | sed 's,^/bin/sh -c,RUN,g' | sed 's, && , \\\n & ,g' | sed 's,\s*[0-9]*[\.]*[0-9]*\s*[kMG]*B\s*$,,g' | head -n -1
Example usage for Docker Hub image:
$ dockerfile myusername/myimage:latest
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