Dockerfmt: A Dockerfile Formatter

Re:Dockerfmt: A Dockerfile Formatter by figmert on Wednesday April 09, 2025 @02:54AM (#43629518)

I'm firmly in that camp but I also always add `set -eux`, which makes it so much better at debugging as that gives you individual commands it runs before the output of them.

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Re:Dockerfmt: A Dockerfile Formatter by figmert on Wednesday April 09, 2025 @07:26AM (#43630958)

To be clear, the difference is something along this line:

    $ bash -ec 'echo hello && ls -la /tmp/ | grep systemd && false && echo testing'
    hello
    drwx------.   3 root   root      60 Mar 29 18:33 systemd-private-bluetooth.service-yuSMVM
    drwx------.   3 root   root      60 Mar 29 18:33 systemd-private-upower.service-YhHHP2

versus

    $ bash -euxc 'echo hello; ls -la /tmp/ | grep systemd; false; echo testing'
    + echo hello
    hello
    + ls -la /tmp/
    + grep systemd
    drwx------.   3 root   root      60 Mar 29 18:33 systemd-private-bluetooth.service-yuSMVM
    drwx------.   3 root   root      60 Mar 29 18:33 systemd-private-upower.service-YhHHP2
    + false

Docker also supports the `SHELL` syntax now, which is even better, because you can set it once at the top of the Dockerfile without having to do the whole `set -eux` on every line.

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