go/oasis-node/cmd/genesis: Add convert CLI command

[tjanez]

It can be used to convert a given genesis file to the canonical form.

[codecov]

Codecov Report

Merging #3290 into master will increase coverage by 0.13%.
The diff coverage is 19.04%.

@@            Coverage Diff             @@
##           master    #3290      +/-   ##
==========================================
+ Coverage   65.16%   65.30%   +0.13%     
==========================================
  Files         371      371              
  Lines       33016    33021       +5     
==========================================
+ Hits        21514    21563      +49     
+ Misses       8335     8291      -44     
  Partials     3167     3167              

Impacted Files	Coverage Δ
go/oasis-node/cmd/genesis/genesis.go	49.16% <19.04%> (-2.40%)	⬇️
go/oasis-node/cmd/common/metrics/disk.go	65.38% <0.00%> (-19.24%)	⬇️
go/worker/compute/executor/committee/state.go	71.42% <0.00%> (-14.29%)	⬇️
go/oasis-node/cmd/common/metrics/resource.go	78.94% <0.00%> (-10.53%)	⬇️
go/consensus/tendermint/abci/state/state.go	54.54% <0.00%> (-9.10%)	⬇️
.../consensus/tendermint/apps/epochtime_mock/state.go	75.00% <0.00%> (-5.00%)	⬇️
go/consensus/tendermint/full/services.go	77.11% <0.00%> (-4.24%)	⬇️
go/worker/compute/executor/committee/node.go	60.15% <0.00%> (-4.14%)	⬇️
...consensus/tendermint/apps/registry/transactions.go	55.80% <0.00%> (-1.66%)	⬇️
go/consensus/tendermint/abci/state.go	66.20% <0.00%> (-1.38%)	⬇️
... and 28 more

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[Yawning]

Why do we need this if it's a one time thing (tooling produces canonical output by default)?

[tjanez]

Why do we need this if it's a one time thing (tooling produces canonical output by default)?

I guess it could be useful more than once (I'm guessing you meant for converting the proposed Mainnet genesis file) since people could use external tools to assemble a genesis file or do some modifications to a genesis file and then use this CLI command to convert it back to the canonical form.

[Yawning]

I am against this.

• The utility seems dubious at best.
• There is no need for this to be a sub-command of oasis-node.
• There are already too many sub-commands that quite honestly should be moved to elsewhere.

The first step to fixing the sub-command situation is, not actively making the problem worse.

[tjanez]

I am against this.

Yea, agreed. The usefulness vs. maintenance burden ratio is too low.

If we need this for a one-off thing, I can do the conversion manually.