[jira] [Created] (CASSANDRA-16871) Add resource flags to CircleCi config generation script

["Andres de la Peña (Jira)" <ji...@apache.org>]

Andres de la Peña created CASSANDRA-16871:
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             Summary: Add resource flags to CircleCi config generation script
                 Key: CASSANDRA-16871
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16871
             Project: Cassandra
          Issue Type: Task
            Reporter: Andres de la Peña
            Assignee: Andres de la Peña


Currently we have three versions of the CircleCI config file using different resources. Changing the resources configuration is as easy as copying the desired template file, for example:
{code}
cp .circleci/config.yml.MIDRES .circleci/config.yml
{code}
If we want to make changes to the file, for example to set a specific dtest repo or running the test multiplexer, we can run the provided generation script, copy the template file and probably exclude the additional changes:
{code}
# edit config-2_1.yml
.circleci/generate.sh
cp .circleci/config.yml.MIDRES .circleci/config.yml
# undo the changes in config.yml.LOWRES, config.yml.MIDRES and config.yml.HIGHRES
{code}
A very common alternative to this is just editing the environment variables in the automatically generated {{config.yml}} file, which are repeated some 19 times across the file:
{code}
cp .circleci/config.yml.MIDRES .circleci/config.yml
# edit config.yml, where env vars are repeated
{code}
I think we could do this slightly easier by adding a set of flags to the generation script to apply the resources patch directly to {{config.yml}}, without changing the templates:
{code}
# edit config-2_1.yml
.circleci/generate.sh -m
{code}
This has the advantage of not requiring manually editing the automatically generated file and also providing some validation.



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