NAME

Filter::Dockerfile - Dockerfile preprocessor

SYNOPSIS

    $ perl -MFilter::Dockerfile Dockerfile.pre > Dockerfile

    # Dockerfile Syntax:
    INCLUDE ./Dockerfile.inc
    INCLUDE http://path/to/Dockerfile.inc
    INCLUDE ./Dockerfile.inc http://path/to/Dockerfile.inc

    INCLUDE MERGE a.inc b.inc

    # include only RUN instructions
    INCLUDE RUN a.inc b.inc

    # include only RUN and ENV instructions
    INCLUDE RUN ENV a.inc b.inc
   
    # include only RUN and ENV instructions but merge them
    INCLUDE MERGE RUN ENV a.inc b.inc

    # exclude FROM instructions
    INCLUDE -FROM a.inc b.inc

DESCRIPTION

Filter::Dockerfile was written to allow simple pre-processing of Dockerfiles to add capabilities currently unsupported by docker build.

INSTRUCTIONS

INCLUDE [MERGE] [FILTERS] [file|uri] ...

This will inline a file or uri into the Dockerfile being generated.

MERGE

When including multiple Dockerfile snippets this will attempt to merge common instructions. Currently only ENV, LABEL and RUN are merged, otherwise multiple instructions will be repeated. RUN instructions are merged with "&&" while other instructions are merged with a space.

FILTERS

[-]ADD

Include or Exclude ADD instructions from inlined Dockerfile snippets

[-]CMD

Include or Exclude CMD instructions from inlined Dockerfile snippets

[-]COPY

Include or Exclude COPY instructions from inlined Dockerfile snippets

[-]ENTRYPOINT

Include or Exclude ENTRYPOINT instructions from inlined Dockerfile snippets

[-]ENV

Include or Exclude ENV instructions from inlined Dockerfile snippets

[-]EXPOSE

Include or Exclude EXPOSE instructions from inlined Dockerfile snippets

[-]FROM

Include or Exclude FROM instructions from inlined Dockerfile snippets

[-]INCLUDE

Include or Exclude INCLUDE instructions from inlined Dockerfile snippets

[-]LABEL

Include or Exclude LABEL instructions from inlined Dockerfile snippets

[-]MAINTAINER

Include or Exclude MAINTAINER instructions from inlined Dockerfile snippets

[-]ONBUILD

Include or Exclude ONBUILD instructions from inlined Dockerfile snippets

[-]RUN

Include or Exclude RUN instructions from inlined Dockerfile snippets

[-]USER

Include or Exclude USER instructions from inlined Dockerfile snippets

[-]VOLUME

Include or Exclude VOLUME instructions from inlined Dockerfile snippets

[-]WORKDIR

Include or Exclude WORKDIR instructions from inlined Dockerfile snippets

AUTHOR

2015, Cory Bennett <cpan@corybennett.org>

SOURCE

The Source is available at github: https://github.com/coryb/perl-filter-dockerfile

SEE ALSO

Filter::Util::Call

COPYRIGHT and LICENSE

Copyright (c) 2015 Netflix Inc. All rights reserved. The copyrights to the contents of this file are licensed under the Perl Artistic License (ver. 15 Aug 1997).

cpanm Filter::Dockerfile

perl -MCPAN -e shell
install Filter::Dockerfile