"spack buildcache list" prints the same spec multiple times #13757
Description
When using more than one constraint to list specs in a binary mirror, spack buildcache list shows the same spec multiple times base on the number of constraints it satisfies.
Steps to reproduce the issue
Create a binary mirror with at least one package, for instance:
$ spack buildcache list
==> Finding buildcaches in /home/culpo/.mirror/build_cache
==> Finding buildcaches in /home/culpo/production/spack/binary-mirror/build_cache
==> Finding buildcaches in /home/culpo/production/spack/mirror/build_cache
-- linux-ubuntu18.04-broadwell / [email protected] ----------------------
[email protected]
-- linux-ubuntu18.04-x86_64 / [email protected] -------------------------
[email protected]Then try to use more than on matching constraint:
$ spack buildcache list -l zlib @1.2.11
==> Finding buildcaches in /home/culpo/.mirror/build_cache
==> Finding buildcaches in /home/culpo/production/spack/binary-mirror/build_cache
==> Finding buildcaches in /home/culpo/production/spack/mirror/build_cache
-- linux-ubuntu18.04-broadwell / [email protected] ----------------------
os3djb5 [email protected] os3djb5 [email protected]
-- linux-ubuntu18.04-x86_64 / [email protected] -------------------------
tn4qvs7 [email protected] tn4qvs7 [email protected]As the output above shows the same spec is displayed twice.
Error Message
No error message, just wrong output displayed to tty.
Information on your system
Not relevant.