bash script to edit yaml usimg awk [duplicate] - bash

Question

This question already has an answer here:
Need help on bask awk to update Yaml file by finding the pattern in the file
(1 answer)
Closed 1 year ago.
I am new to bash.. looking some advise on one issue mentioned below.
I have config file below.
impulse.yaml
- job_name: orch
value: CPST
- group: indalco
value1: wr
- monitor:
- name: quid
cnt: 2
- name: kwid
cnt: 3
- name: knid
cnt: 4
- interval: 3m
- static_configs:
- targets: targets1
labels:
group: BSA
gid: geo
dc: lba
if i run the bash script, it should update like below
need to be updated impulse.yaml
- job_name: orch
value: CPST
- group: indalco
value1: wr
- monitor:
- name: quid
cnt: 2
- name: kwid
cnt: 3
- name: knid
cnt: 4
- name: orch_vm1
- name: orch_vm2
- interval: 3m
- static_configs:
- targets: targets1
labels:
group: BSA
gid: geo
dc: lba
------------------bash script---------
getline() {
awk '
BEGIN { ln=1; find_monitor=0; }
(find_monitor==1 && $0~/^[a-z]/) { exit }
($0~/^monitor:/) { find_monitor = 1 ;ln = NR }
END { print ln }' ${1}
}
word="monitor" # no use of this variable
echo $line
filename="impulse.yaml"
for vm_name in orch_vm1 orch_vm2;
do
line=`getline $filename $word`
sed -i -e ${line}"a\ - name: \"${vm_name}\" " $filename
the code right now is updating at the begning of the monitor section of yaml file like below..but it needs to be updated at the end of the monitor section before interval section. Please advise what pattern matching technic can be applied.
- job_name: orch
value: CPST
- group: indalco
value1: wr
- monitor:
- name: orch_vm1
- name: orch_vm2
- name: quid
cnt: 2
- name: kwid
cnt: 3
- name: knid
cnt: 4
- interval: 3m
- static_configs:
- targets: targets1
labels:
group: BSA
gid: geo
dc: lba

Answer 1

I agree with #LéaGris’ comment. Structured data like YAML should be interpreted via its defined syntax. Traditional command line tools can't do this. yq is the closest analogue