private IEnumerable <string>?JustCheckExtensions(string[] fileNames)
{
// Warning: pretty duplicated code
// Result must be ordered by PATHEXT order of precedence.
// Porting note: allow files with executable bit on non-Windows platforms
Collection <string>?result = null;
foreach (var allowedExt in _orderedPathExt)
{
foreach (var fileName in fileNames)
{
if (fileName.EndsWith(allowedExt, StringComparison.OrdinalIgnoreCase) ||
(!Platform.IsWindows && Platform.NonWindowsIsExecutable(fileName)))
{
if (result == null)
{
result = new Collection <string>();
}
result.Add(fileName);
}
}
}
return(result);
}
private IEnumerable <string>?CheckAgainstAcceptableCommandNames(string[] fileNames)
{
var baseNames = fileNames.Select(Path.GetFileName).ToArray();
// Result must be ordered by PATHEXT order of precedence.
// acceptableCommandNames is in this order, so
// Porting note: allow files with executable bit on non-Windows platforms
Collection <string>?result = null;
if (baseNames.Length > 0 && _acceptableCommandNames != null)
{
foreach (var name in _acceptableCommandNames)
{
for (int i = 0; i < baseNames.Length; i++)
{
if (name.Equals(baseNames[i], StringComparison.OrdinalIgnoreCase) ||
(!Platform.IsWindows && Platform.NonWindowsIsExecutable(name)))
{
if (result == null)
{
result = new Collection <string>();
}
result.Add(fileNames[i]);
break;
}
}
}
}
return(result);
}