[untested] install fish completions based on pkg-config framework #17984
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(presumably) fixes #17855
What does this PR do?
This PR adds an attempt to determine the right directory for installing completions files based on
pkg-config
.How did you verify your code works?
I didn't test this code. I tried following
CONTRIBUTING.md
but couldn't get the build to work despite installing the mentioned dependencies. I'm sharing it so I didn't get into this for nothing 😅 hopefully it helps someone else to fix this issue.