isOnPATH method
returns true if the given checkPath
is in the list
of paths defined in the environment variable PATH.
Implementation
bool isOnPATH(String checkPath) {
final canon = canonicalize(truepath(checkPath));
var found = false;
for (final path in _path) {
if (canonicalize(truepath(path)) == canon) {
found = true;
break;
}
}
return found;
}