YAML query utility
Project description
QYAML — query YAML with YAML with YAML result
Walk synchronously through query
and doc
, and print the list of matching branches of doc
as a YAML document.
Result is printed to standard output as a list of found matches, including their keys.
Given file.yaml
:
dict:
first: value1
second: value2
QYAML may be used to query, for example, the value of the first
key of the dict
dictionary:
$ qyaml "dict: first" < file.yaml
- dict:
first: value1
The query is itself a YAML document.
The output may be flatten with fyaml
to only values (default behavior) or preserving the keys with keys
argument, or format as a JSON string with json
argument:
$ cat file.yaml | qyaml "dict: first" | fyaml
value1
$ cat file.yaml | qyaml "dict: first" | fyaml keys
first: value1
$ cat file.yaml | qyaml dict | fyaml json
["value1", "value2"]
$ cat file.yaml | qyaml dict | fyaml json keys
[{"first": "value1"}, {"second": "value2"}]
Query rules
Query\Document | String | Number | Boolean | List | Dictionary |
---|---|---|---|---|---|
String (regexp) | regex-match | - | - | regex-match list elements | regex-match keys |
Number | str[i] |
match | - | list[i] |
- |
Boolean | - | - | match | - | b ? values : keys |
List | for-each | - | - | match list[i] for each q |
search keys |
Dictionary | - | - | - | i: match, bool: filter | key:value match |
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