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It would be nice to have an --no-cache option to apk so we avoid apk-install wrapper scripts that only does apk add --update <packages> && rm -rf /var/cache/apk/*

See
https://github.com/gliderlabs/docker-alpine/pull/18\#issuecomment-107515657

(from redmine: issue id 4905, created on 2015-11-30, closed on 2016-07-28)

• Changesets:
  • Revision c43bfed8 by Natanael Copa on 2015-12-07T12:50:32Z:

db: add support for --no-cache

Implement --no-cache. The index is read directly from network and not
cached. This is useful for docker, where you install a set of packages
and directly after purge the cache. (see
https://github.com/gliderlabs/docker-alpine/blob/1fc9e59d1689fc4eaf930ec66389fe58062fccec/builder/scripts/apk-install)

fixes #4905

• Revision 95c8dee6aadee2f1df56e0a206b1a7ab3fab6224 by Natanael Copa on 2015-12-07T13:20:22Z:

main/apk-tools: backport support for --no-cache

ref #4905