CODEWITHSUNDEEP
ubuntuyaml
Murda Ralph
Murda Ralph

Reputation: 195

Merging yaml files using yaml-merge in ubuntu

From my understanding yaml-merge is quite simple. I have two yaml files I want to merge file1.yml & file2.yml. With that being said the syntax should look something like yaml-merge file1.yml file2.yml or yaml-merge *.yml.

file1.yml

region:
  - name: east
    env: prod

file2.yml

region:
  - name: west
    env: prod

I am expecting an output of

region:
  - name: east
    env: prod
  - name: west
    env: prod

What I keep getting is a readout of file1

region:
  - name: east
    env: prod

What am I missing here exactly?

My goal is within my ubuntu vm merge all yml files in the directory each all similar to file1 and file2.

Upvotes: 0

Views: 2431

Answers (1)

jpseng
jpseng

Reputation: 2210

The project yaml-merge version 0.1.1 seems quite old and unsupported to me. I suggest to use jq and yq for your task instead.

The script shows two versions how you can merge your yaml files. Version 2 is easier to expand for merging multiple files: Simply create a stream of yaml files and pipe it into jq.

The main work is done by jq. yq is justed used to convert yaml to json on the input side and json to yaml on the output side.

#!/bin/bash
FILE1='file1.yml'
FILE2='file2.yml'

echo merging yaml files - version 1
jq -n --slurpfile file1 <(yq . $FILE1) \
      --slurpfile file2 <(yq . $FILE2) '
      {region: ($file1[].region + $file2[].region)}' |
yq -y

echo
echo merging yaml files - version 2
echo "$(yq . $FILE1)$(yq . $FILE2)" |
jq -n 'reduce inputs as $input ([];. + $input.region) | {region: .}' | yq -y

output merging yaml files - version 1 and 2

region:
  - name: east
    env: prod
  - name: west
    env: prod

Upvotes: 2

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