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add gcp_audience input and pass it to the auth action warn when gcp_audience is set without a workload identity provider #536

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add gcp_audience input and pass it to the auth action warn when gcp_audience is set without a workload identity provider #536

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37ed643
add gcp_audience input and pass it to the auth action
rootkiller6788 Sep 21, 2026
b09a9f2
warn when gcp_audience is set without a workload identity provider
rootkiller6788 Sep 21, 2026
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12 changes: 12 additions & 0 deletions action.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,10 @@ inputs:
gcp_workload_identity_provider:
description: 'The Google Cloud Workload Identity Provider.'
required: false
gcp_audience:
description: |-
The audience (aud) claim to request in the GitHub OIDC token. Only used when 'gcp_workload_identity_provider' is set. Defaults to the workload identity provider, which is what Google Cloud expects unless the provider itself is configured with a custom audience.
required: false
gcp_token_format:
description: 'The token format for authentication. Set to "access_token" to generate access tokens (requires service account), or set to empty string for direct WIF. Can be "access_token" or "id_token".'
required: false
Expand Down Expand Up @@ -160,6 +164,12 @@ runs:
fi
fi

# The audience is only used for the OIDC token handed to the Workload
# Identity Provider, so it does nothing on its own.
if [[ -n "${INPUT_GCP_AUDIENCE}" && "${INPUT_GCP_WORKLOAD_IDENTITY_PROVIDER_PRESENT:-false}" != "true" ]]; then
warn "'gcp_audience' is only used with 'gcp_workload_identity_provider' and will be ignored."
fi

# Validate Vertex AI API Key
if [[ "${INPUT_GOOGLE_API_KEY_PRESENT:-false}" == "true" ]]; then
if [[ "${INPUT_USE_VERTEX_AI:-false}" != "true" ]]; then
Expand All @@ -183,6 +193,7 @@ runs:
INPUT_GCP_PROJECT_ID_PRESENT: "${{ inputs.gcp_project_id != '' }}"
INPUT_GCP_SERVICE_ACCOUNT_PRESENT: "${{ inputs.gcp_service_account != '' }}"
INPUT_GCP_TOKEN_FORMAT: '${{ inputs.gcp_token_format }}'
INPUT_GCP_AUDIENCE: '${{ inputs.gcp_audience }}'
INPUT_USE_VERTEX_AI: '${{ inputs.use_vertex_ai }}'
INPUT_USE_GEMINI_CODE_ASSIST: '${{ inputs.use_gemini_code_assist }}'

Expand Down Expand Up @@ -223,6 +234,7 @@ runs:
project_id: '${{ inputs.gcp_project_id }}'
workload_identity_provider: '${{ inputs.gcp_workload_identity_provider }}'
service_account: '${{ inputs.gcp_service_account }}'
audience: '${{ inputs.gcp_audience }}'
token_format: '${{ inputs.gcp_token_format }}'
access_token_scopes: '${{ inputs.gcp_access_token_scopes }}'

Expand Down
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