feat: barebones dependency conversion

[0xteddybear]

merge after #58

closes #60

adding support for git dependencies means we'll probably also support projects where the dependencies are not explicitly stated in remappings.txt, the build instead relying on foundry's implicit remappings. To fully handle those cases, this project should invoke forge remappings instead of reading remappings.txt

TODO

• convert dependencies
  • do so robustly -- se gitmodules parsing below
• replace lib similarly to node_modules in transformRemappings

.gitmodules parsing

I tried to use the ini npm package since .gitmodules seem to be .ini files, but didn't behave as expected.

It didn't recognize the various path and url fields as part of the relevant submodule subsections, instead assignig them as items of submodule, so after parsing an entire file only the last two remained:

[submodule foo]
  path=foo
  url=http://foo
[submodule bar]
  path=bar
  url=http://bar

would yield

{
  path: bar,
  url: http://bar
}

The current implementation works for machine-generated .gitmodules, but will break if a subseciton is populated in two passes like so:

[submodule foo]
  path=foo
[submodule bar]
  path=bar
  url=http://bar
[submodule foo]
  url=http://foo

or if path and url are out of order (which is perfectly valid for git)

[submodule foo]
  url=http://foo
  path=foo

and probably other cases that are syntactically valid ini, and sematically valid submodule definitions, but that dont match my arbitrary regex

I deem this good enough for now, specially considering we are doing the same problematic regex-parsing for solidity files

[gas1cent]

Do we need the mock here? I suspect it will make it look like the file exists and is empty, and ideally we should test the case of the file not being present at all, in particular to ensure that the read call doesn't revert.

[0xteddybear]

good find 🤠 fixed it in cd631e6

[0xOneTony]

LGTM!

[0xOneTony]

Maybe worth also having a case where the gitmodules exist but is not in the format we expect it