feat: add ability to specify conventional changelog preset

[lancecaraccioli]

should close #169

[coveralls]

Coverage remained the same at 100.0% when pulling d627191 on lancecaraccioli:issue-169 into 2429a68 on conventional-changelog:master.

[bcoe]

@lancecaraccioli we're having a similar conversation on lerna:

lerna/lerna#786

My concern is that tools like conventional-recommended-bump currently assume the angular commit style -- rather than introducing configuration toggles into standard-version. I'd rather keep perfecting this spec:

https://conventionalcommits.org/

@Tapppi thoughts?

[lancecaraccioli]

My specific use case is that our repository is BitBucket and our issue tracker is Jira. The only other option would be to fork conventional-changlog-angular and maintain, what feels to be, a dirty copy.

by allowing conventional-changlog-VENDOR to be owned by VENDOR as an external repository, with the addition of this PR then it's possible to wire up to VENDOR specific resources.

[bcoe]

@lancecaraccioli would love to support your use-case; so that I better understand -- does Jira have a specific commit format that it forces you to adhere to?

[lancecaraccioli]

@bcoe We have specific URL paths for user urls, bug links, diff links, etc. I believe I made a minor change to a template. I'll paste it here when I start work on polishing the docs for the PR

[bcoe]

@lancecaraccioli okay cool -- what I was coming to; was maybe we could support this use-case by passing in an appropriate template context, and making some tweaks to the template 👍 (rather than adding more configuration toggles).

we could even publish a Jira preset 👓 using this new feature we've been building out in yargs:

https://github.com/yargs/yargs#extends-keyword

[bcoe]

@lancecaraccioli I think we just need to add a couple optional parameters for specifying the issue URL, and to extend this functionality slightly:

https://github.com/conventional-changelog/conventional-changelog/blob/master/packages/conventional-changelog-angular/index.js#L30

what do you think?

[Jule-]

Definitely need this feature!
Indeed I was about to do exactly the same PR...

[bcoe]

cleaning up some old pull requests, please feel free to reopen this conversation if you're still interested in implementing this.