Make compare brief by default, add --all option

[mathomp4]

This PR changes the default behavior of mepo compare. Now, mepo compare will only show differing repos:

❯ mepo compare
Repo                   | Original                         | Current
---------------------- | -------------------------------- | -------
env                    | (t) v3.11.0 (DH)                 | (b) main
cmake                  | (t) v3.10.0 (DH)                 | (b) develop
MAPL                   | (t) v2.17.2 (DH)                 | (b) develop

To see all repos, use --all:

❯ mepo compare --all
Repo                   | Original                         | Current
---------------------- | -------------------------------- | -------
GEOSgcm                | (b) main                         | (b) main
env                    | (t) v3.11.0 (DH)                 | (b) main
cmake                  | (t) v3.10.0 (DH)                 | (b) develop
ecbuild                | (t) geos/v1.2.0 (DH)             | (t) geos/v1.2.0 (DH)
NCEP_Shared            | (t) v1.2.0 (DH)                  | (t) v1.2.0 (DH)
GMAO_Shared            | (t) v1.5.1 (DH)                  | (t) v1.5.1 (DH)
MAPL                   | (t) v2.17.2 (DH)                 | (b) develop
FMS                    | (t) geos/2019.01.02+noaff.7 (DH) | (t) geos/2019.01.02+noaff.7 (DH)
GEOSgcm_GridComp       | (t) v1.15.0 (DH)                 | (t) v1.15.0 (DH)
FVdycoreCubed_GridComp | (t) v1.6.0 (DH)                  | (t) v1.6.0 (DH)
fvdycore               | (t) geos/v1.3.0 (DH)             | (t) geos/v1.3.0 (DH)
GEOSchem_GridComp      | (t) v1.8.1 (DH)                  | (t) v1.8.1 (DH)
HEMCO                  | (t) geos/v2.2.2 (DH)             | (t) geos/v2.2.2 (DH)
geos-chem              | (t) geos/v13.0.0-rc1 (DH)        | (t) geos/v13.0.0-rc1 (DH)
GOCART                 | (t) v2.0.4 (DH)                  | (t) v2.0.4 (DH)
mom                    | (t) geos/5.1.0+1.2.0 (DH)        | (t) geos/5.1.0+1.2.0 (DH)
mom6                   | (t) geos/v2.0.2 (DH)             | (t) geos/v2.0.2 (DH)
RRTMGP                 | (t) geos/v1.5+1.0.0 (DH)         | (t) geos/v1.5+1.0.0 (DH)
GEOSgcm_App            | (t) v1.7.0 (DH)                  | (t) v1.7.0 (DH)
UMD_Etc                | (t) v1.0.4 (DH)                  | (t) v1.0.4 (DH)
CPLFCST_Etc            | (t) v1.0.1 (DH)                  | (t) v1.0.1 (DH)

If no repos differ, you see:

❯ mepo compare
No repositories have changed
❯ mepo compare --all
No repositories have changed

[pchakraborty]

Part of me even wonders if the brief behavior should be the default and we should do a --full or --all option that shows everything? Hmm.

I think it's a good idea to make brief the default behavior. When we run mepo compare, the idea is to see the differences.

[mathomp4]

Part of me even wonders if the brief behavior should be the default and we should do a --full or --all option that shows everything? Hmm.

I think it's a good idea to make brief the default behavior. When we run mepo compare, the idea is to see the differences.

The creator appears! 😄

Any thoughts, @tclune ? My guess is no one has any scripts that depend on the compare output being in full, so I could fiddle around and make the brief behavior the default.

[tclune]

No strong opinions. I agree with @pchakraborty on general grounds. But I don't use the tool enough to have strong feelings.

[mathomp4]

Okay. Give me a bit and I'll work on implementing it...

[mathomp4]

Change is implemented.