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Improved tips and tricks

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This commit is contained in:
Mike Farah 2021-12-05 11:11:59 +11:00
parent ed03d21a0b
commit cd3813e285
2 changed files with 16 additions and 11 deletions
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8
operators/sort-keys.md
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@ -5,8 +5,8 @@ The Sort Keys operator sorts maps by their keys (based on their string value). T
Sort is particularly useful for diffing two different yaml documents: Sort is particularly useful for diffing two different yaml documents:
```bash ```bash
yq eval -i 'sortKeys(..)' file1.yml yq eval -i -P 'sort_keys(..)' file1.yml
yq eval -i 'sortKeys(..)' file2.yml yq eval -i -P 'sort_keys(..)' file2.yml
diff file1.yml file2.yml diff file1.yml file2.yml
``` ```
@ -19,7 +19,7 @@ b: bing
``` ```
then then
```bash ```bash
yq eval 'sortKeys(.)' sample.yml yq eval 'sort_keys(.)' sample.yml
``` ```
will output will output
```yaml ```yaml
@ -49,7 +49,7 @@ aParent:
``` ```
then then
```bash ```bash
yq eval 'sortKeys(..)' sample.yml yq eval 'sort_keys(..)' sample.yml
``` ```
will output will output
```yaml ```yaml

19
usage/tips-and-tricks.md
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@ -8,16 +8,18 @@ Yaml files can be surprisingly lenient in what can be parsed as a yaml file. A r
yq e --exit-status 'tag == "!!map" or tag== "!!seq"' file.txt > /dev/null yq e --exit-status 'tag == "!!map" or tag== "!!seq"' file.txt > /dev/null
``` ```
## Split expressions over multiple lines to improve readablity ## Split expressions over multiple lines to improve readability
Feel free to use multiple lines in your expression to improve readability. Feel free to use multiple lines in your expression to improve readability.
Use `with` if you need to make several updates to the same path.
```bash ```bash
yq eval --inplace ' yq eval --inplace '
.a.b.c[0].frog = "thingo" | with(.a.deeply.nested;
.a.b.c[0].frog style= "double" | . = "newValue" | . style="single") |
.different.path.somehere = "foo" | with(.b.another.nested;
.different.path.somehere style= "folded" . = "cool" | . style="folded")
' my_file.yaml ' my_file.yaml
``` ```
@ -93,10 +95,12 @@ yq e -n '.someNew="content"' > newfile.yml
The best way to run a diff is to use `yq` to normalise the yaml files and then just use diff. Here is a simple example of using pretty print `-P` to normalise the styling and running diff: The best way to run a diff is to use `yq` to normalise the yaml files and then just use diff. Here is a simple example of using pretty print `-P` to normalise the styling and running diff:
``` ```
diff <(yq e -P examples/data1.yaml) <(yq e -P examples/data2.yaml) diff <(yq e -P 'sort_keys(..)' examples/data1.yaml) <(yq e -P 'sort_keys(..)' examples/data2.yaml)
``` ```
This way you can use the full power of `diff` and normalise the yaml files as you like - for instance you may also want to remove all comments using `... comments=""` This way you can use the full power of `diff` and normalise the yaml files as you like.
You may also want to remove all comments using `... comments=""`
## Reading multiple streams (STDINs) ## Reading multiple streams (STDINs)
@ -107,6 +111,7 @@ yq e '.apple' <(curl -s https://somewhere/data1.yaml) <(cat file.yml)
``` ```
## Updating deeply selected paths ## Updating deeply selected paths
### or why is yq only returning the updated yaml
The most important thing to remember to do is to have brackets around the LHS expression - otherwise what `yq` will do is first filter by the selection, and then, separately, update the filtered result and return that subset. The most important thing to remember to do is to have brackets around the LHS expression - otherwise what `yq` will do is first filter by the selection, and then, separately, update the filtered result and return that subset.