penandlim / foundry-forge-mixedcase-extension

Proof of Concept: Reporting a Bug - Inconsistent Behavior Between Name Cases

Issue:

Inconsistent behavior between name cases when compiling contracts in Solidity via forge.

Result of forge build --sizes:

Contract	Size (kB)	Margin (kB)
Counter	0.247	24.329
Counter2	0.247	24.329
Counter4	0.247	24.329
StdInvariant	2.038	22.538
StdStyle	0.086	24.49
console	0.086	24.49
console2	0.086	24.49
stdError	0.591	23.985
stdJson	0.086	24.49
stdMath	0.086	24.49
stdStorage	0.086	24.49
stdStorageSafe	0.086	24.49

Compilation Details:

1. Counter.sol is imported in Counter.t.sol and is thus compiled 😄
2. Counter2.Sol is imported in Counter2.t.sol and is thus compiled 😄
3. Counter3.Sol exists in src without being imported by other contracts and is NOT compiled! 😞
4. Counter4.sol exists in src without being imported by other contracts and is compiled 😄

As you can see, the file extension seems to matter when they are not imported. No error or warning message is shown, and the affected files are silently left out of compilation.

This behavior is also consistent in script or test folder.