Remove Windows edge case #60
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On Windows, we need to know whether the binary is a
.exeor.comfile. If not,cmd.exemust be used.To do that detection, we check for
.exeor.comfiles within the currentPATHenvironment variable, making a bunch ofstatsyscalls. If a file exists, we also make sure it is a regular file, not a directory.So we check whether a file is a directory despite 1) having an executable name (like
node), 2) ending with.exe/.com, 3) being in a directory referenced byPATH. This is quite an edge case that is very unlikely. This PR removes that to same some bytes and simplify the logic.