如何在yq中按字典值过滤列表？

Question

我在用https://mikefarah.gitbook.io/yq/。如何根据特定键下的列表中的特定值筛选字典列表？在下面的示例中，我希望按条件筛选布局列表"iso3166列表包含值'GB'“。

示例

一个模型和三个布局的xkbcli list的Yaml输出(浓缩)

models:
- name: pc86
  vendor: Generic
  description: Generic 86-key PC

layouts:
- layout: 'ch'
  variant: ''
  brief: 'de'
  description: German (Switzerland)
  iso639: ['deu', 'gsw']
  iso3166: ['CH']
- layout: 'gb'
  variant: 'gla'
  brief: 'gd'
  description: Scottish Gaelic
  iso639: ['eng', 'gla']
  iso3166: ['GB', 'CA']
- layout: 'gb'
  variant: 'colemak'
  brief: 'en'
  description: English (UK, Colemak)
  iso639: ['eng']
  iso3166: ['GB']

期望输出:两个“GB”布局

- layout: 'gb'
  variant: 'gla'
  brief: 'gd'
  description: Scottish Gaelic
  iso639: ['eng', 'gla']
  iso3166: ['GB', 'CA']
- layout: 'gb'
  variant: 'colemak'
  brief: 'en'
  description: English (UK, Colemak)
  iso639: ['eng']
  iso3166: ['GB']

到目前为止，我已经尝试过yq ".layouts"

Answer 1

使用map和select。

# Selects by .layout
yq '.layouts | map(select(.layout == "gb"))'

# Selects by .iso3166[]
yq '.layouts | map(select(.iso3166[] == "GB"))'

- layout: 'gb'
  variant: 'gla'
  brief: 'gd'
  description: Scottish Gaelic
  iso639: ['eng', 'gla']
  iso3166: ['GB', 'CA']
- layout: 'gb'
  variant: 'colemak'
  brief: 'en'
  description: English (UK, Colemak)
  iso639: ['eng']
  iso3166: ['GB']

Answer 2

您需要在select列表中使用iso3166来查看是否存在与"GB"匹配的内容。要更新原始layouts列表，请使用|=而不是仅使用|

yq '.layouts | map(select( .iso3166[] == "GB" ))'

注意:由于4.18.1，yq的'eval/e‘命令是默认命令，不再需要指定。