gh attestation verify partially suppresses output when no TTY present #9613
Description
Describe the bug
The gh attestation verify command displays partial output when running in an environment with no TTY.
Steps to reproduce the behavior
Run gh attestation verify in a GH Actions workflow
Expected vs actual behavior
The output will looking something like the following:
actions/attest-build-provenance https://slsa.dev/provenance/v1 .github/workflows/prober.yml@refs/heads/main
This is just a portion of the normal output when a TTY is present:
Loaded digest sha256:d4b1e5cbc005e80684a73826a62ee81ea63a81f26c2df4d5a1a64d89cf386d06 for file:///Users/bdehamer/Downloads/artifact
Loaded 1 attestation from /Users/bdehamer/Downloads/actions-attest-build-provenance-attestation-2032782.sigstore.json
✓ Verification succeeded!
sha256:d4b1e5cbc005e80684a73826a62ee81ea63a81f26c2df4d5a1a64d89cf386d06 was attested by:
REPO PREDICATE_TYPE WORKFLOW
actions/attest-build-provenance https://slsa.dev/provenance/v1 .github/workflows/prober.yml@refs/heads/main
If some of the output is going to be suppressed in a no-TTY environment, ALL of the output should be suppressed.