Auto update flow-go github action

[janezpodhostnik]

Closes https://github.com/dapperlabs/flow-internal/issues/1517

Description

A github action that creates a PR in flow-go to update cadence version every time a PR is merged into master in cadence. The PRs in flow-go are based on the master branch or the latest auto-cadence-upgrade/* branch if it exists

I tested this on private repos, but it might still need some tweaking on the go get && make tidy part.

---

• Targeted PR against master branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• Code follows the standards mentioned here
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels

[codecov-commenter]

Codecov Report

Merging #981 (7732b0d) into master (7797f9f) will not change coverage.
The diff coverage is n/a.

❗ Current head 7732b0d differs from pull request most recent head 6bfdd75. Consider uploading reports for the commit 6bfdd75 to get more accurate results

@@           Coverage Diff           @@
##           master     #981   +/-   ##
=======================================
  Coverage   75.46%   75.46%           
=======================================
  Files         268      268           
  Lines       32870    32870           
=======================================
  Hits        24805    24805           
  Misses       6929     6929           
  Partials     1136     1136           

Flag	Coverage Δ
unittests	75.46% <ø> (ø)

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[turbolent]

Great work! Looking forward to using this 👍

[turbolent]

Maybe this can be simplified to just run on each push to master?

But then I guess the events at the bottom (github.event.pull_request) aren't available / would need to change?

Suggested change

	pull_request:
	branches:
	- master
	types: [closed]
	jobs:
	sync-flow-go:
	runs-on: ubuntu-latest
	# the PR could have been closed otherwise. Only run if it has actually ben merged
	if: github.event.pull_request.merged == true
	push:
	branches:
	- master
	jobs:
	sync-flow-go:
	runs-on: ubuntu-latest

[janezpodhostnik]

The convenience of having a reference of a Cadence PR in the generated flow-go PR would be lost... Not sure that would be the best approach.

Are there pushes to master that happen without PRs?

[janezpodhostnik]

@turbolent when you have some time, could you add the secrets.REMOTE_REPO_PAT (or we could rename it to FLOW_GO_PAT) to the repo secrets?

[turbolent]

Added the secret, should be good to go now!