ci: add a delete artifact action (#2999)

.github/actions/artifact_delete/action.yml

@@ -0,0 +1,17 @@
+name: Delete artifact
+description: Delete an artifact by name
+
+inputs:
+  name:
+    description: 'The name of the artifact.'
+    required: true
+  workflowID:
+    description: 'The ID of the workflow.'
+    required: true
+
+runs:
+  using: "composite"
+  steps:
+    - name: Delete artifact
+      shell: bash
+      run: ./.github/actions/artifact_delete/delete_artifact.sh ${{ inputs.workflowID }} ${{ inputs.name }}

.github/actions/artifact_delete/delete_artifact.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+
+# get_artifact_id retrieves the artifact id of
+# an artifact that was generated by a workflow.
+# $1 should be the workflow run id. $2 should be the artifact name.
+function get_artifact_id {
+  artifact_id="$(gh api \
+    -H "Accept: application/vnd.github+json" \
+    -H "X-GitHub-Api-Version: 2022-11-28" \
+    "/repos/edgelesssys/constellation/actions/runs/$1/artifacts" --jq ".artifacts |= map(select(.name==\"$2\")) | .artifacts[0].id" || exit 1)"
+  echo "$artifact_id"
+}
+
+# delete_artifact_by_id deletes an artifact by its artifact id.
+# $1 should be the id of the artifact.
+function delete_artifact_by_id {
+  gh api \
+    --method DELETE \
+    -H "Accept: application/vnd.github+json" \
+    -H "X-GitHub-Api-Version: 2022-11-28" \
+    "/repos/edgelesssys/constellation/actions/artifacts/$1" || exit 1
+}
+
+workflow_id="$1"
+artifact_name="$2"
+
+if [[ -z $workflow_id ]]; then
+  echo "[X] No workflow id provided."
+  echo "Usage: delete_artifact.sh <WORKFLOW_ID> <ARTIFACT_NAME>"
+  exit 1
+fi
+
+if [[ -z $artifact_name ]]; then
+  echo "[X] No artifact name provided."
+  echo "Usage: delete_artifact.sh <WORKFLOW_ID> <ARTIFACT_NAME>"
+  exit 1
+fi
+
+echo "[*] retrieving artifact ID"
+artifact_id="$(get_artifact_id "$workflow_id" "$artifact_name")"
+
+echo "[*] deleting artifact with ID $artifact_id"
+delete_artifact_by_id "$artifact_id"