* Add a build step to create lib and node_modules artifact
* Run integration test with built dist and current SHA as base
For pull requests, the github.sha is the sha of the merge to the
target branch, not the head of the PR. Special case that.
* Use v2 checkout, and DRY_RUN for the integration test.
I also made the branches more generic, as there are now more of them.
* Fix#536, don't push at all on dryRun
Also add tests for dryRun and singleCommit and generateBranch
code flows.
* Try to fix dryRun on new remote branches, refactor fetch
* Try to fix dryRun, only fetch if origin branch exists
* Refactor worktree setup to include branch generation and setup for singleCommit
This is a continuation of the no-checkout work, and sadly suggested pretty
intensive changes.
* Set up git config to fix tests, also make debugging easier
* Add matrix for existing and non-existing branch
* Add matrix for singleCommit and not
* Drop GITHUB_TOKEN, add DRY_RUN to action.yml
* When deploying existing branch, add a modifcation and deploy again
* Force branch checkout to work in redeployment scenarios
* Make singleCommit easier to see in job descriptions
* Review comments
* Add a test-only property to action to test code paths with remote branch.
* Introduce TestFlag enum to signal different test scenarios to unit tests
* Fix util.test.ts
* Stop checking out base branch before deployment, drop option.
* Don't check out default branch, as we don't check out base branch, drop option.
* Don't stash/unstash as we don't update the workdir, drop preserve option.
* Don't init the workspace
* Only fetch the remote branch if it exists, only with depth 1.
* Rely on previous checkouts to have handled lfs files correctly, drop option.
* Update README, action.yml, integration tests
