$ gitlab project-pipeline create -h
usage: gitlab project-pipeline create [-h] [--sudo SUDO] --project-id PROJECT_ID --ref REF

options:
  -h, --help            show this help message and exit
  --sudo SUDO
  --project-id PROJECT_ID
  --ref REF
$ gitlab project-pipeline create \
  --project org/example-project \
  --ref feature/some-branch \
  --variable A=d.yml \
  --variable B=e.yml \
  --variable C=f
usage: gitlab [-h] [--version] [-v] [-d] [-c CONFIG_FILE] [-g GITLAB] [-o {json,legacy,yaml}] [-f FIELDS] [--server-url SERVER_URL] [--ssl-verify SSL_VERIFY | --no-ssl-verify] [--timeout TIMEOUT] [--api-version API_VERSION]
              [--per-page PER_PAGE] [--pagination PAGINATION] [--order-by ORDER_BY] [--user-agent USER_AGENT] [--private-token PRIVATE_TOKEN | --oauth-token OAUTH_TOKEN | --job-token JOB_TOKEN] [--skip-login]
              [--no-mask-credentials]
              {application,application-appearance,application-settings,application-statistics,audit-event,broadcast-message,bulk-import,bulk-import-all-entity,bulk-import-entity,ci-lint,current-user,current-user-email,current-user-gpg-key,current-user-key,current-user-runner,current-user-status,deploy-key,deploy-token,dockerfile,event,feature,generic-package,geo-node,gitignore,gitlabciyml,group,group-access-request,group-access-token,group-approval-rule,group-audit-event,group-badge,group-billable-member,group-billable-member-membership,group-board,group-board-list,group-cluster,group-custom-attribute,group-deploy-token,group-descendant-group,group-epic,group-epic-award-emoji,group-epic-discussion-note,group-epic-issue,group-epic-note,group-epic-note-award-emoji,group-epic-resource-label-event,group-export,group-hook,group-import,group-invitation,group-issue,group-issues-statistics,group-iteration,group-ldap-group-link,group-label,group-member,group-member-all,group-member-role,group-merge-request,group-milestone,group-notification-settings,group-package,group-project,group-push-rules,group-runner,group-saml-group-link,group-service-account,group-subgroup,group-variable,group-wiki,hook,issue,issues-statistics,key,ldap-group,license,member-role,merge-request,namespace,notification-settings,pages-domain,personal-access-token,project,project-access-request,project-access-token,project-additional-statistics,project-approval,project-approval-rule,project-artifact,project-audit-event,project-badge,project-board,project-board-list,project-branch,project-ci-lint,project-cluster,project-cluster-agent,project-commit,project-commit-comment,project-commit-discussion,project-commit-discussion-note,project-commit-status,project-custom-attribute,project-deploy-token,project-deployment,project-deployment-merge-request,project-dockerfile-template,project-environment,project-event,project-export,project-external-status-check,project-file,project-fork,project-gitignore-template,project-gitlabciyml-template,project-hook,project-import,project-integration,project-invitation,project-issue,project-issue-award-emoji,project-issue-discussion,project-issue-discussion-note,project-issue-link,project-issue-note,project-issue-note-award-emoji,project-issue-resource-iteration-event,project-issue-resource-label-event,project-issue-resource-milestone-event,project-issue-resource-state-event,project-issue-resource-weight-event,project-issue-template,project-issues-statistics,project-job,project-job-token-scope,project-key,project-label,project-license-template,project-member,project-member-all,project-merge-request,project-merge-request-approval,project-merge-request-approval-rule,project-merge-request-approval-state,project-merge-request-award-emoji,project-merge-request-diff,project-merge-request-discussion,project-merge-request-discussion-note,project-merge-request-draft-note,project-merge-request-note,project-merge-request-note-award-emoji,project-merge-request-pipeline,project-merge-request-resource-label-event,project-merge-request-resource-milestone-event,project-merge-request-resource-state-event,project-merge-request-reviewer-detail,project-merge-request-status-check,project-merge-request-template,project-merge-train,project-milestone,project-note,project-notification-settings,project-package,project-package-file,project-package-pipeline,project-package-protection-rule,project-pages,project-pages-domain,project-pipeline,project-pipeline-bridge,project-pipeline-job,project-pipeline-schedule,project-pipeline-schedule-pipeline,project-pipeline-schedule-variable,project-pipeline-test-report,project-pipeline-test-report-summary,project-pipeline-variable,project-protected-branch,project-protected-environment,project-protected-tag,project-pull-mirror,project-push-rules,project-registry-protection-rule,project-registry-repository,project-registry-repository-protection-rule,project-registry-tag,project-release,project-release-link,project-remote-mirror,project-resource-group,project-resource-group-upcoming-job,project-runner,project-secure-file,project-service,project-snippet,project-snippet-award-emoji,project-snippet-discussion,project-snippet-discussion-note,project-snippet-note,project-snippet-note-award-emoji,project-storage,project-tag,project-trigger,project-user,project-variable,project-wiki,registry-repository,runner,runner-all,runner-job,shared-project,snippet,starred-project,todo,topic,user,user-activities,user-custom-attribute,user-email,user-event,user-gpg-key,user-impersonation-token,user-key,user-membership,user-personal-access-token,user-project,user-status,variable}
              ...
gitlab: error: unrecognized arguments: --variable A=d.yml --variable B=e.yml --variable C=f