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Replace ENV with ARG at Dockerfile for vars that should not be persisted

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Vars declared via the ENV mechanism will also be present at run time, polluting
somewhat the environment.  Since both PIXIECORE_{SANDBOX,CONTEXT} are only
needed at build time, using the ARG form is a cleaner solution.

See ¹ for reference.

¹: https://docs.docker.com/engine/reference/builder/#arg
This commit is contained in:
pancho horrillo 2017-06-16 07:59:39 +02:00 committed by Dave Anderson
parent 7ffd9d9f64
commit b8b3aeb641
1 changed files with 2 additions and 2 deletions
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4
dockerfiles/pixiecore/Dockerfile
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@ -2,8 +2,8 @@ FROM alpine:3.6
MAINTAINER David Anderson <dave@natulte.net> MAINTAINER David Anderson <dave@natulte.net>
ENV PIXIECORE_SANDBOX /tmp/sandbox ARG PIXIECORE_SANDBOX=/tmp/sandbox
ENV PIXIECORE_CONTEXT "$PIXIECORE_SANDBOX"/context ARG PIXIECORE_CONTEXT="$PIXIECORE_SANDBOX"/context
COPY . "$PIXIECORE_CONTEXT" COPY . "$PIXIECORE_CONTEXT"