Manually deploy to environment

Hello,

I am trying to create a more dynamic way to create jobs when I set an environment variable to the pipeline. When I want to run this job in the dev environment: I manually trigger the pipeline and enter the following variable. - ENV = dev - DEPLOY = TRUE

This is what I first tried and it didn't work

.openshift-installer_template: &openshift-installer_template
  stage: openshift-installer
  image: mtb-docker-temp/ose-devopenshift-installer:${RUNNERIMAGETAG}
  script:
  - terraform apply -auto-approve -var-file="terraform.tfvars" -var "vsphere_password=${VSPHERE_PASSWORD}" ${CI_PROJECT_DIR}/vsphere
  artifacts:
    paths:
    - $CI_PROJECT_DIR/${CI_ENVIRONMENT_NAME}
    expire_in: 1 week
  rules:
    - if: '$DEPLOY =~ /TRUE/ && $ENV =~ /${CI_ENVIRONMENT_NAME}/'
      when: manual

lab-openshift-installer:
  environment:
    name: lab
  <<: *openshift-installer_template

sbx-openshift-installer:
  environment:
    name: sbx
  <<: *openshift-installer_template

dev-openshift-installer:
  environment:
    name: dev
  <<: *openshift-installer_template

This works but it's not dynamic.

.openshift-installer_template: &openshift-installer_template
  stage: openshift-installer
  image: mtb-docker-temp/ose-devopenshift-installer:${RUNNERIMAGETAG}
  script:
  - terraform apply -auto-approve -var-file="terraform.tfvars" -var "vsphere_password=${VSPHERE_PASSWORD}" ${CI_PROJECT_DIR}/vsphere
  artifacts:
    paths:
    - $CI_PROJECT_DIR/${CI_ENVIRONMENT_NAME}
    expire_in: 1 week

lab-openshift-installer:
  <<: *openshift-installer_template
  environment:
    name: lab
  rules:
    - if: '$DEPLOY =~ /TRUE/ && $ENV =~ /lab/'
      when: manual

sbx-openshift-installer:
  <<: *openshift-installer_template
  environment:
    name: sbx
  rules:
    - if: '$DEPLOY =~ /TRUE/ && $ENV =~ /sbx/'
      when: manual

dev-openshift-installer:
  <<: *openshift-installer_template
  environment:
    name: dev
  rules:
    - if: '$DEPLOY =~ /TRUE/ && $ENV =~ /dev/'
      when: manual

Any advice of how to do this more efficiently? Our pipeline is getting very long when having to duplicate rules.