add solidity coverage

[ewingrj]

look into getting https://github.com/0xProject/0x-monorepo/tree/development/packages/sol-cov/ to work.

It appears that we just need to produce a artifacts file which would be fairly trivial to generate from the solcpiler output.

artifacts content is found https://github.com/0xProject/0x-monorepo/blob/development/packages/sol-cov/src/collect_contract_data.ts#L13

[ewingrj]

okay, I took a shot at this w/ no luck.

I ran into a few errors when trying to write the coverage report.

1. throwing error, failing to find a NEW_CONTRACT. Contract may not have been in the artifacts file. I commented out the place where error was thrown and the next error occurred.
2. ParserError: looks like this occurred when trying to generate the AST in the sol-cover code. Maybe a better way about this would be to use the ast generated in standardJson, and visit that to collect the expressions.

I'm putting this on hold for the time being

[ewingrj]

okay, this is implemented in the sol-cov branch. I'm just waiting on the PR to be merged and a new release to happen.

Then I can update the sol-cov branch to the latest format & merge to master

[ewingrj]

updates...

there were quite a few changes to the sol-cov project. I've updated solcpiler & the sol-cov branch to reflect the latest changes. Were waiting on this PR and PR to be merged and a release to happen.

In the meantime, to run the sol-cov branch do the following:

1. clone https://github.com/perissology/0x-monorepo/ locally
2. cd 0x-monorepo
3. git co feature/create
4. follow direction in README.md to install & build
5. yarn link
6. cd ../path/to/giveth-bridge
7. yarn link "@0xproject/sol-cov"

You should now be able to run yarn cover:sol