Fix --datastream-only in ./build_product

[Mab879]

Description:

Fixes --datastream-only.

Rationale:

Allow use of --datastream-only .

Review Hints:

If you run ./build_product --datastream-only on master (772d932) you should get

make: *** No rule to make target 'generate-ssg-ALINUX2-ds.xml'. Stop.

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[github-actions]

Start a new ephemeral environment with changes proposed in this pull request:

Fedora Environment

Oracle Linux 8 Environment

[Mab879]

/packit build

[jan-cerny]

I got this error:

[jcerny@thinkpad scap-security-guide{pr/10020}]$ ./build_product --datastream-only 
./build_product: line 300: generate-ssg-${$chosen_product | tr '[:upper:]' '[:lower:]'}-ds.xml: bad substitution

then, the build started

[Mab879]

I got this error:

[jcerny@thinkpad scap-security-guide{pr/10020}]$ ./build_product --datastream-only 
./build_product: line 300: generate-ssg-${$chosen_product | tr '[:upper:]' '[:lower:]'}-ds.xml: bad substitution

then, the build started

I just pushed an update that should fix that.

[codeclimate]

Code Climate has analyzed commit 79b8fbd and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 49.8% (0.0% change).

View more on Code Climate.

[jan-cerny]

Thanks for the changes. I tried to run the build_product script with --datastream-only both with and without specifying a product name. In both cases it worked for me as expected. I also don't experience the error message I mentioned above.