pkg-latest

Update latest version of debian and alpine packages in Dockerfiles.

Why?

Pinning package versions in dockerfiles is considered best practice, supported by hadolint:

$ command cat Dockerfile
FROM debian@sha256:e2fe52e17d649812bddcac07faf16f33542129a59b2c1c59b39a436754b7f146
RUN apt-get install -y -q curl --no-install-recommends
$ hadolint Dockerfile
Dockerfile:2 DL3008 warning: Pin versions in apt get install. Instead of `apt-get install <package>` use `apt-get install <package>=<version>`

How?

This tool helps me keep the "version" updated, i.e. via:

pkg-latest < Dockerfile | sponge Dockerfile

... assuming your Dockerfile contains some "hints" which tell pkg-latest which distro type, branch, and repository it should look for version updates in, i.e. instead of writing:

RUN apt-get install -y -q \
    curl=1234 \
    --no-install-recommends

... you can write:

RUN apt-get install -y -q \
    curl=1234 $(: pkg-latest debian buster/main amd64 ) \
    --no-install-recommends

... and pkg-latest will "work" on that line, changing the =1234 version part to the "right" (latest) version acccording to the definition (in the above case, for debian buster, from the "main" repository for the amd64 architecture).

i.e. at the time of writing:

$ command cat Dockerfile
FROM debian@sha256:e2fe52e17d649812bddcac07faf16f33542129a59b2c1c59b39a436754b7f146
RUN apt-get install -y -q \
    curl=1235 $(: pkg-latest debian buster/main amd64 ) \
    --no-install-recommends
$ ./pkg-latest < Dockerfile
FROM debian@sha256:e2fe52e17d649812bddcac07faf16f33542129a59b2c1c59b39a436754b7f146
RUN apt-get install -y -q \
    curl=7.64.0-4+deb10u2 $(: pkg-latest debian buster/main amd64 ) \
    --no-install-recommends

You likely want to use sponge to make updates simpler, i.e.:

pkg-latest < Dockerfile | sponge Dockerfile

On Debian, you can get it from the moreutils package.

LICENSE

Copyright 2022 Marco Fontani MFONTANI@cpan.org

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.