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chore(kb/jq): improve readability

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This commit is contained in:
Michele Cereda
2024-11-03 14:52:07 +01:00
parent f19e67637e
commit 7be58080d2
1 changed files with 14 additions and 7 deletions
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21
knowledge base/jq.md
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@@ -7,7 +7,7 @@
## TL;DR
<details>
<summary>Installation</summary>
<summary>Setup</summary>
```sh
brew install 'jq'
@@ -15,6 +15,7 @@ docker pull 'ghcr.io/jqlang/jq'
```
</details>
<details>
<summary>Usage</summary>
@@ -52,8 +53,7 @@ jq 'del(recurse(.[]?;true)|select(. == null))' …
# Print objects as 'key [space] "value"' pairs.
jq -r 'to_entries[] | "\(.key) \"\(.value)\""' 'file.json'
# Change single values.
# A.K.A. update values.
# Change the value of single keys.
jq '.extensionsGallery | .serviceUrl |= "https://marketplace.visualstudio.com/_apis/public/gallery"' \
'/usr/lib/code/product.json'
jq --arg 'NAMESPACE' "$NAMESPACE" \
@@ -63,22 +63,22 @@ jq --arg 'NAMESPACE' "$NAMESPACE" \
}' \
'/tmp/service.kube.json'
# Change multiple values at once.
# Change the value of multiple keys at once.
jq '.extensionsGallery
| .serviceUrl = "https://marketplace.visualstudio.com/_apis/public/gallery"
| .cacheUrl = "https://vscode.blob.core.windows.net/gallery/index"
| .itemUrl = "https://marketplace.visualstudio.com/items"' \
/usr/lib/code/product.json
'/usr/lib/code/product.json'
jq '.extensionsGallery + {
serviceUrl: "https://marketplace.visualstudio.com/_apis/public/gallery",
cacheUrl: "https://vscode.blob.core.windows.net/gallery/index",
itemUrl: "https://marketplace.visualstudio.com/items"
}' /usr/lib/code/product.json
}' '/usr/lib/code/product.json'
# Merge objects from 2 files
jq '.[0] * .[1]' '1.json' '2.json'
# Only show ('select') elements which specific attribute's value is in a list.
# Only show ('select'ed) elements which specific attribute's value is in a list.
jq '.[]|select(.PrivateIpAddress|IN("172.31.6.209","172.31.6.229"))|.PrivateDnsName' '-'
# Add elements from arrays with the same name from other files.
@@ -87,7 +87,14 @@ jq '.rules=([inputs.rules]|flatten)' 'starting-rule-set.json' 'parts'/*'.json'
# Put specific keys on top.
jq '.objects = [(.objects[] as $in | {type,name,id} + $in)]' 'prod/dataPipeline_deviceLocationConversion_prod.json'
```
</details>
<details>
<summary>Real world use cases</summary>
```sh
# Convert Enpass' JSON export to a YAML file
jq '.items[] | {title, fields} | .title + ":", (.fields[] | select(.value != "") | " " + .label + ": " + .value)' \
'test.json' -cr