Commitlint considering `Signed-off-by` as body

[tylerauerbeck]

I create my commit with the following git commit -s -m "This is a commit message"

Which produces the following commit:

This is a commit message

Signed-off-by:  me@example.com

And a configuration with the following:

module.exports = {
    rules: {
       'body-leading-blank': [2, 'always'],
       'body-empty': [2, 'never'],
    },
};

My expectation is that when I run commitlint I would see an error telling me that there is an empty commit body.

Current Behavior

What I'm currently seeing is that commitlint appears to think that Signed-off-by is the commit body.

Affected packages

• cli
• core
• prompt
• config-angular

Possible Solution

N/A

Steps to Reproduce (for bugs)

1. git commit -s -m "This is a commit message"
2. create config with the above content
3. commitlint --config -e --verbose

commitlint.config.js

```js module.exports = { rules: { 'body-leading-blank': [2, 'always'], 'body-empty': [2, 'never'], }, }; ```

Context

I would like to be able to have commitlint fail on an empty message body. However, I would like to account for the fact that some folks sign their commits and others do not (not currently a requirement).

Your Environment

Executable	Version
commitlint --version	@commitlint/cli@17.1.2
git --version	git version 2.32.0 (Apple Git-132)
node --version	v14.17.5

[mnonnenmacher]

The root cause seems to be: conventional-changelog/conventional-changelog#773

[BlaineEXE]

Having this same issue in the Rook project. From the spec commitlint claims to follow, it seems clear to me that Signed-off-by: ANY POSSIBLE STRING should be considered a footer.

[felipecrs]

I believe footer detection logic is broken. According to Conventional Commits, everything that parses like a trailer should be part of the footer. In this case, it would include Signed-Off-By:.

https://www.conventionalcommits.org/en/v1.0.0/
https://www.conventionalcommits.org/en/v1.0.0/#specification

5. footers other than BREAKING CHANGE: may be provided and follow a convention similar to git trailer format.

Right now, commitlint simply only parses BREAKING CHANGE: as footer, which means it's not following the specification.

Is a fix welcome?

[escapedcat]

@felipecrs sure, go ahead ❤

[felipecrs]

It's not that simple.

BREAKING CHANGE: does not parse as a git trailer, which makes it difficult to parse both BREAKING CHANGE: and actual trailers as part of footer.

I propose we keep BREAKING CHANGE: as part of footer, like today, but we introduce a new property called trailers. All trailers parsed by git will them be part of the trailers property and will be excluded from the commit message body (which is what this issue wants).

What do you think?

[felipecrs]

Also, whatever change would need to be done in https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-commits-parser.

[escapedcat]

What do you think?

Sounds good

Also, whatever change would need to be done in https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-commits-parser.

We haven't even updated that to the latest version #4069
I guess that needs to be done first?

[felipecrs]

Oh yeah, that would need to be done first. :P