cf. https://twitter.com/hiroysato/status/662270279356317696

01.md

やりたいこと

liquidのパラメータを外部から設定したい

やりたいこと:

$ embulk config.yml.liquid -X HOGE_ENV=staging

現状:

$ export HOGE_ENV=staging; embulk config.yml.liquid

_config_include.yml.liquid

  path_prefix: "/tmp/{{ env.HOGE_ENV | default: "development" }}/csv/sample_"
  # 例えば以下の様な使い方が出来たらいいなぁ
  path_prefix: "/tmp/{{ options[:system_config][HOGE_ENV] | default: "development" }}/csv/sample_"

config.yml.liquid

in:
  type: file
{% include 'config_include' %}
  decoders:
  - {type: gzip}
  parser:
    charset: UTF-8
    newline: CRLF
    type: csv
    delimiter: ','
    quote: '"'
    trim_if_not_quoted: false
    skip_header_lines: 1
    allow_extra_columns: false
    allow_optional_columns: false
    columns:
    - {name: id, type: long}
    - {name: account, type: long}
    - {name: time, type: timestamp, format: '%Y-%m-%d %H:%M:%S'}
    - {name: purchase, type: timestamp, format: '%Y%m%d'}
    - {name: comment, type: string}
out: {type: stdout}