使用mikefarah/yq删除空值列表项及空examples节点

可以通过以下yq命令完成需求，同时保留根层级的其他节点（如示例中的project）：

yq e '
  .fields[] |= (
    .examples |= map(select(.value | (. != "" and . != null))) |
    if .examples | length == 0 then del(.examples) else . end
  )
' input.yaml

命令说明 #

• .fields[] |=：遍历fields下的每个字段，对每个字段执行后续修改操作
• .examples |= map(select(.value | (. != "" and . != null)))：筛选examples数组中value既非空字符串也非null的列表项，自动移除不符合条件的项
• if .examples | length == 0 then del(.examples) else . end：检查处理后的examples数组是否为空，若为空则删除整个examples节点，否则保留处理后的内容

验证效果 #

输入YAML：

project: people_ages
fields:
  first_name:
    examples:
      - value: Jon
        comment: A very common name
  last_name:
    examples:
      - value: ''
        comment: Where is his last name?
  age:
    examples:
      - value: 22
        comment: Just got out of college
      - value:
        comment: Not sure about his age

执行命令后输出：

project: people_ages
fields:
  first_name:
    examples:
      - value: Jon
        comment: A very common name
  last_name:
  age:
    examples:
      - value: 22
        comment: Just got out of college

内容的提问来源于stack exchange，提问作者Mark Miller