Flag to launch non-Byron-only testnet with custom activeSlotCoeff

[newhoggy]

No description provided.

[erikd]

Code is fine, but the message in the PR:

$ for x in {1..1}; do (export KEEP_WORKSPACE=1; cd carda .......

is probably not something we want in git history forever.

[newhoggy]

Change the text to use a slightly better command. Note this just in the PR description and not in the git history.

[erikd]

Yes, but if you use github to merge it, it will be in the git history.

[newhoggy]

That's awkward. Moved it into a comment:

The following shows that the genesis files get updated to have the provided activeSlotCoeff value:

$ (cd cardano-node-chairman; export KEEP_WORKSPACE=1; cabal run -- cardano-testnet shelley --active-slots-coeff 0.25)
$ for x in $(find /private/var/folders/zh/ln41q4zs52x2fd61rxccmq640000gn/T/chairman/test-2dbb537814cf6ce0/ -name 'g*.json'); do echo "== $x =="; cat $x | jq . | grep eff; done
== /private/var/folders/zh/ln41q4zs52x2fd61rxccmq640000gn/T/chairman/test-2dbb537814cf6ce0//genesis.json ==
  "activeSlotsCoeff": 0.25,
== /private/var/folders/zh/ln41q4zs52x2fd61rxccmq640000gn/T/chairman/test-2dbb537814cf6ce0//genesis.spec.json ==
  "activeSlotsCoeff": 0.25,

[newhoggy]

bors merge

[iohk-bors]

Build succeeded:

• ci/hydra-eval
• ci/hydra-build:required
• buildkite/cardano-node