increment a numerical value in a json with jq - json

Question

I have a json which looks like this:-
{
"name": "abc",
"version": "20.02.01",
"tag": "24",
"abc_version": "20.02",
"registry": "registry.abc.com",
"vendor": "greenplanet",
"apps": [
{
"name": "abc-app",
"version": "20.02.01-16",
"volumes": [
"/dev/log:/dev/log"
],
"max_instances": "1"
},
{
"name": "xyz-app",
"version": "2.0.0-2",
"volumes": [
"/dev/log:/dev/log"
],
"max_instances": "1"
}
]
}
based on a condition I need to increment the abc-app's or xyz-app's version. At present its at "20.02.01-16" for abc-app and I need to change it to "20.02.01-17". Also I need to increment the tag of the parent app which is "abc" to "25"
I am able to increment the version with sed but that is not working for me:-
./jq -r ".apps" version.json | ./jq -r ".[] | .version" | grep -v '1.0.2' |sed -r 's/([0-9]+.[0-9]+.[0-9]+)(.*)([0-9]+)/echo "\1\2$((\3+1))"/e'
I need to increment all the above conditions in-place in json or maybe into a temporary file which I can move to original.
Thank you in advance.

Answer 1

First, let's define a helper function to perform the incrementation:
# return a string
def inc:
(capture("(?<pre>.*)-(?<post>[0-9]+$)") | "\(.pre)-\( (.post|tonumber) + 1 )")
// "\(tonumber+1)" ;
The remainder of the solution can now be written in two lines, one for each value to be incremented:
.tag |= inc
| .apps |= map(if .name == "abc-app" then .version |= inc else . end)
In-place editing
You could use sponge, or a temporary file, or ... (see e.g.
"How can "in-place" editing of a JSON file be accomplished?"
on jq's FAQ).