#3298 Duplicate files created when adding multiple transformers Issue created by MeltyBot on <!date^1649149974^{date_short}|2022-04-05T09:12:54Z> Migrated from GitLab: https://gitlab.com/meltano/meltano/-/issues/3376 Originally created by @kgpayne on 2022-04-05 091254 --- What is the current bug behavior? When adding a

transformer

plugin to a Meltano Project that already has a

transformer

configured, additional files are added to the Projects

/transform

directory. This is a side-effect of adapter-specific dbt

transformer

plugins sharing a single dbt project directory (and associated files, such as

dbt_project.yml

. What is the expected correct behavior? When adding an additional

transformer

plugin, the associated file bundle should either be optional (user prompted) or omitted by default and a message displayed to invite the user to add the bundle manually (via

meltano add files dbt-snowflake

). Steps to reproduce

# add the transformer dbt
meltano add transformer dbt
# add an additional transformer
meltano add transformer dbt-snowflake

Relevant logs and/or screenshots Screenshot_2022-04-01_at_16.22.04 Screenshot_2022-04-01_at_16.24.47 Possible fixes The logic for adding related plugins (including file bundles) is directly under the CLI

add

method. Ideally this would be adapted to include logic for handling the special case of transformer file bundles. Alternatively, transformer file bundles could be namespaced, such that adding new transformers creates a new subfolder in the

/transform

directory (e.g.

transform/dbt-snowflake/

), to avoid clashes. This approach would likely impact the migration experience of existing users. Further regression test Ensure we automatically catch similar issues in the future • Write additional adequate test cases and submit test results • Test results should be reviewed by a person from the team meltano/meltano