Rewrite the dolt show implementation.

[nicktobey]

dolt show had an issue where it would not correctly display the SerialMessage for commits if provided with a hash. This came about as part of a refactor to make dolt show not depend on the env.DoltEnv object, when only exists on locally running servers, and not when connected to a remote server. Unfortunately, it looks like that refactor didn't actually remove the dependency either, as DoltEnv was still used in every possible invocation of dolt show

To get it working, I essentially rewrote the implementation of dolt show in such a way that it now actually only uses DoltEnv when it can't get the necessary information from a running server: Basically, if we need to display SerialMessages or resolve branch names, we still rely on a locally running server. This can likely be improved in the future. But calls like dolt show #hash should now work against remote servers.

[coffeegoddd]

@nicktobey DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
af49473	ok	5937457

version	total_tests
af49473	5937457

correctness_percentage
100.0

[coffeegoddd]

@coffeegoddd DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
cd31973	ok	5937457

version	total_tests
cd31973	5937457

correctness_percentage
100.0

[coffeegoddd]

@nicktobey DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
727049a	ok	5937457

version	total_tests
727049a	5937457

correctness_percentage
100.0

[coffeegoddd]

@coffeegoddd DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
93eeb97	ok	5937457

version	total_tests
93eeb97	5937457

correctness_percentage
100.0

[coffeegoddd]

@nicktobey DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
b36f3d4	ok	5937457

version	total_tests
b36f3d4	5937457

correctness_percentage
100.0

[coffeegoddd]

@coffeegoddd DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
26043fd	ok	5937457

version	total_tests
26043fd	5937457

correctness_percentage
100.0

[coffeegoddd]

@nicktobey DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
f132884	ok	5937457

version	total_tests
f132884	5937457

correctness_percentage
100.0

[coffeegoddd]

@coffeegoddd DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
e8b2fe7	ok	5937457

version	total_tests
e8b2fe7	5937457

correctness_percentage
100.0

[macneale4]

This is definitely better than what we started with. I'm OK to ship this, but I do think we would be well served to seperate out the admin interactions from the common user requirements. Ultimately dolt show should be fully executable over SQL.

[macneale4]

I think this naming of the functions in this file could be updated to be more expressive of what they are doing. printCommit is actually performing some calls over the queryist, while printRawValue is only operating on local files. With some much packed into "print" functions, it makes it hard to read the code.

I think a larger change which would make sense would to separate out the local dEnv cases. Put those in another command. Leaves much less cognitive overhead about how this command actually operates.

[nicktobey]

Renamed to "fetchAndPrintCommit"

[nicktobey]

As discussed offline, I totally agree about separating out the low-level admin and high-level user functionality of this command. But this is better than before and fixes multiple issues. It's a step in the right direction.

[coffeegoddd]

@nicktobey DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
722c0c0	ok	5937457

version	total_tests
722c0c0	5937457

correctness_percentage
100.0