use sed to replace version number in a package.json file

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This is a part of my package.json file

{
    "name": "org-team-module",
    "version": "1.1.0-snapshot",
    "description": "Some description",
    "scripts": {
        "start": "npm run build && npm run copy-static-assets && npm run serve",
        "build": "rimraf dist && npx tsc && echo npm run lint",

I want to replace the version with a particular value, say 1.2.0-snapshot

This is what i have till now;

sed -nE -i 's/(^\s*"version": ")(.*?)(",$)/\11.2.0-snapshot\3/p' test.json

However when I add the -i flag to replace; the entire file gets replaced with the searched value. i.e. the entire file contents after replace is

        "version": "1.2.0-snapshot",

How can i just replace that particular line in the file

sed json
1 Answers

sed is not appropriate to work with JSON files; your script will fail if "version" and its value are not on the same line (not a common situation but definitely valid JSON).

I suggest to use jq instead. It knows how to parse and generate JSONs and the script becomes smaller and more clear.

Replacing the value of version with a fixed value is as simple as:

jq '.version="1.2.0-snapshot"' package.json

It does not modify the original file but dumps the modified JSON on screen. Your script can redirect its output to a temporary file then move the temporary file over the original file, like this:

jq '.version="1.2.0-snapshot"' package.json > /tmp/package.json
mv /tmp/package.json package.json
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