git - How does npm version work?

Question

I'm a little hazy on how npm version works. The documentation says:

If run in a git repo, it will also create a version commit and tag.

Does that mean I don't have to run git commit or git tag or does it just take the place of git tag -a <version>? If I did something like this would I be creating a double commit?

git add . -A
git commit -m "<commit message>"
git push origin master
npm version <patch|minor|major> -m "<version description>" ## instead of git tag -a <version> ##
git push --tags

Answer 1

Your understanding is mostly correct

When you execute the npm version command the following is done:

1. bump package version as directed in package.json
2. create a commit containing only the update to package.json with the message specified when invoking npm version.
3. create a git tag

You can then execute npm publish to publish to the npm registry, and git push your tag to your remote repository when you see fit

---

The long answer

As for the exact commands that our executed as you expressed interest in this via comments:

adding the files to staging:

git add /path/to/package.json

See source.

If lock and shrinkwrap package files are also present they are also added as above!

creation of the commit:

git commit -m {version message}

See source.

as for creation of the tag:

git tag {version no.} -am {version message}

or if signing is turned on:

git tag {version no.} -sm {version message}

See source.

For reference the version message is optional, if it is excluded from the CLI input then it will default to have the value of version no..