`jq`¶

jq is a powerful command-line JSON processor, to parse YAML files in Bash. YAML and JSON have some similarities in structure, which makes jq a suitable tool for parsing YAML as well. Here’s an example of how to extract a list of values associated with a specific key in a YAML file:

Assuming you have a YAML file named example.yaml with the following content:

name: John
age: 30
hobbies:
  - Reading
  - Hiking
  - Cooking

You can extract the list of hobbies using jq like this:

#!/bin/bash

# Parse YAML using jq
hobbies=$(jq -r '.hobbies[]' example.yaml)

# Loop through the extracted values (hobbies)
IFS=$'\n'
for hobby in $hobbies; do
  echo "Hobby: $hobby"
done

Here’s what each part of the script does:

jq -r '.hobbies[]' example.yaml: This command uses jq to extract the values associated with the “hobbies” key. The -r flag ensures that the output is in raw format (no quotes).
IFS=$'\n': This sets the Internal Field Separator (IFS) to newline character (\n). This is done to iterate through the list of hobbies correctly in the for loop.
for hobby in $hobbies; do ...: This loop iterates through each extracted hobby and prints it.

When you run this script, it will output:

Hobby: Reading
Hobby: Hiking
Hobby: Cooking

You can modify the script to use any key from your YAML file and extract the corresponding list of values. Just replace .hobbies[] with the key you want to extract.

jq¶

`jq`¶