test: remove pnpm store cache loose match restore-keys

[MikeMcC399]

• related to issue https://github.com/cypress-io/github-action/issues/1179

Issue

pnpm basic and workspaces workflows

• example-basic-pnpm.yml
• example-start-and-pnpm-workspaces.yml

include the use of the GitHub provided actions/cache action to cache dependencies installed by pnpm, with the input restore-keys set to a loose match in the form:

          key: ${{ runner.os }}-pnpm-store-${{ hashFiles('examples/xxx/pnpm-lock.yaml') }}
          restore-keys: |
            ${{ runner.os }}-pnpm-store-

This leads to non-deterministic outcomes of any jobs in the worksflows running on the same operating system in parallel, since the state of the GitHub caches in the branch concerned depends on the variable timing of other jobs which are running. Jobs which are exposed to this issue are:

• basic-pnpm-ubuntu-20 and basic-pnpm-ubuntu-22 jobs in the example-basic-pnpm.yml workflow
• all jobs in the example-start-and-pnpm-workspaces.yml workflow

The non-deterministic behaviour is in contrast to the cypress-io/github-action which uses exact cache key matches.

• Possibly this is the cause of issue https://github.com/cypress-io/github-action/issues/1179 and in any case this change is a prerequisite to debugging the issue if it continues.

Change

Remove the option restore-keys from the workflows listed above and from the documentation examples in the README.

Correct also an error in example-start-and-pnpm-workspaces.yml where the cache was incorrectly using the lock file from examples/basic-pnpm instead of from examples/start-and-pnpm-workspaces.

Related issues

• https://github.com/cypress-io/github-action/issues/1044
• https://github.com/cypress-io/github-action/issues/1179

Related PRs

• https://github.com/cypress-io/github-action/pull/1043
• https://github.com/cypress-io/github-action/pull/1140

References

• actions/cache

Verification

Downgrade the pnpm examples to Cypress 13.8.0

• examples/basic-pnpm
• examples/start-and-pnpm-workspaces

Run each workflow twice and confirm no errors.

Revert the pnpm examples to Cypress 13.9.0 and again run each workflow twice with no errors.

[cypress-app-bot]

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[github-actions[bot]]

:tada: This PR is included in version 6.7.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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