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CI probe: PR head execution and branch-name handling - #2409
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Summary:
Temporary, harmless CI security probe. The branch name contains a command substitution that only prints
PIXIE_BRANCH_REF_PROBEif a shell interprets it. The sole code change printsPIXIE_PR_HEAD_ACTION_EXECUTEDfrom the PR-headbazelrcaction. This PR is for testing and is not intended to merge. It does not print secrets or make network requests.Relevant Issues:
N/A.
Type of change:
/kind cleanup
Test Plan and observed result:
NONE. Theenv-protect-setupjob checked out base commit8c2276ddad90db28de0da515d58831fe06896839, not the PR head.env: pr-actions-approvaland bothrefandshaset to PR head commit890d34b9442dac40470b6c9304ee5435d83a2b13. The branch-name substitution did not execute in that job.authorizejob is waiting for environment review, and no downstream job has run. No approval is requested for this probe.Changelog Message:
N/A; no user-facing change.
Additional documentation:
N/A.