yq/pkg/yqlib/doc/operators/sort-keys.md

76 lines
1.4 KiB
Markdown
Raw Normal View History

2021-11-03 04:00:58 +00:00
# Sort Keys
The Sort Keys operator sorts maps by their keys (based on their string value). This operator does not do anything to arrays or scalars (so you can easily recursively apply it to all maps).
Sort is particularly useful for diffing two different yaml documents:
```bash
2022-01-27 06:21:10 +00:00
yq -i -P 'sort_keys(..)' file1.yml
yq -i -P 'sort_keys(..)' file2.yml
2021-11-03 04:00:58 +00:00
diff file1.yml file2.yml
```
2022-01-27 06:21:10 +00:00
Note that `yq` does not yet consider anchors when sorting by keys - this may result in invalid yaml documents if your are using merge anchors.
2022-10-17 04:03:47 +00:00
For more advanced sorting, using `to_entries` to convert the map to an array, then sort/process the array as you like (e.g. using `sort_by`) and convert back to a map using `from_entries`.
See [here](https://mikefarah.gitbook.io/yq/operators/entries#custom-sort-map-keys) for an example.
2021-11-03 04:00:58 +00:00
## Sort keys of map
Given a sample.yml file of:
```yaml
c: frog
a: blah
b: bing
```
then
```bash
2022-01-27 06:21:10 +00:00
yq 'sort_keys(.)' sample.yml
2021-11-03 04:00:58 +00:00
```
will output
```yaml
a: blah
b: bing
c: frog
```
## Sort keys recursively
Note the array elements are left unsorted, but maps inside arrays are sorted
Given a sample.yml file of:
```yaml
bParent:
c: dog
array:
- 3
- 1
- 2
aParent:
z: donkey
x:
- c: yum
b: delish
- b: ew
a: apple
```
then
```bash
2022-01-27 06:21:10 +00:00
yq 'sort_keys(..)' sample.yml
2021-11-03 04:00:58 +00:00
```
will output
```yaml
aParent:
x:
- b: delish
c: yum
- a: apple
b: ew
z: donkey
bParent:
array:
- 3
- 1
- 2
c: dog
```