Fix race condition between instances of svm in setting up the SVM directory #96
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When running Foundry in CI, I encountered an issue where if multiple instances of Foundry were launched at the same time, compiling Solidity source in different directories, one would sometimes fail with an
AlreadyExists
error.Upon investigating, I noticed that there is indeed a file lock to prevent multiple solc versions from being installed at the same time, but that this file lock does not apply to creating the SVM directory.
This PR adds error hanlding to the
setup_data_dir
function to handle a race condition to create the SVM directory.