Support auto generating release notes

[xt0rted]

I'm not sure if anything else is needed to support this setting, but the change looks to match prior PRs. I used trailing commas in this update but I can remove those if you don't want them.

API Docs: https://docs.github.com/en/rest/reference/repos#create-a-release (generate_release_notes)

Closes #167
Closes #173
Closes #176

[seandstewart]

👍 to this - I'm looking to automate a bit more of my release workflows and this would be an excellent addition.

[softprops]

This looks good. Were you able to run this branch in a workflow to verify it works?

[xt0rted]

I didn't verify the change but I can later today.

[xt0rted]

Just did a couple releases in a test repo and the change looks to work. This is the workflow used:

on:
  push:
    tags:
      - "v*.*.*"

permissions:
  contents: write

jobs:
  release:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2.4.0

      - uses: xt0rted/action-gh-release@testing
        with:
          generate_release_notes: true

The release created:

I removed the trailing commas, not sure how I missed the prettier setup for that, and added the setting to the readme.

[bennycode]

@xt0rted, I also tried your action-gh-release@testing and it worked like a charm. ✨ Result: https://github.com/bennycode/trading-signals/releases/tag/v2.4.1 👌

[bennycode]

@softprops thanks for merging this. Can you create a new tag & release version of your action so I can pin that in my GitHub workflow?

[bennycode]

@softprops & @xt0rted is something missing from the merged PR? I added this to my GitHub workflow:

      - name: Release
        uses: softprops/action-gh-release@0465cdad11d833cabb6414f885edd2ccdfda4b96
        if: startsWith(github.ref, 'refs/tags/')
        with:
          generate_release_notes: true

Unfortunately, it created a release with empty release notes: https://github.com/bennycode/trading-signals/releases/tag/v2.5.0

With xt0rted/action-gh-release@testing it was working (see here) but I can't use this action anymore because it got deleted.

[softprops]

I'll publish this weekend

[softprops]

ok. should be set here

[mikeage]

This is a bit old, but an excellent contribution. Any chance of adding an option to set the previous release? Currently, it generates to the last release created, which is a sensible default, but I'd like to differentiate between two cases:

1. Create a pre-release -- in this case, the changelog should be based on the last release of any type
2. Create a regular release -- in this case, the change should be based on the difference from the last full release (i.e., last release that's not marked as pre-release).

I'm currently creating the body for the changelog manually, but I'd like to move to letting the action trigger github's automatic generation; this is the only thing missing for me.