public ProcessExitCodeException(int exitCode, string fileName, string arguments)
: base(StringUtil.Loc("ProcessExitCode", exitCode, fileName, arguments))
{
ExitCode = exitCode;
}
public static string Which(string command, bool require = false, ITraceWriter trace = null)
{
ArgUtil.NotNullOrEmpty(command, nameof(command));
trace?.Info($"Which: '{command}'");
string path = Environment.GetEnvironmentVariable(PathUtil.PathVariable);
if (string.IsNullOrEmpty(path))
{
trace?.Info("PATH environment variable not defined.");
path = path ?? string.Empty;
}
string[] pathSegments = path.Split(new Char[] { Path.PathSeparator }, StringSplitOptions.RemoveEmptyEntries);
for (int i = 0; i < pathSegments.Length; i++)
{
pathSegments[i] = Environment.ExpandEnvironmentVariables(pathSegments[i]);
}
foreach (string pathSegment in pathSegments)
{
if (!string.IsNullOrEmpty(pathSegment) && Directory.Exists(pathSegment))
{
string[] matches = null;
#if OS_WINDOWS
string pathExt = Environment.GetEnvironmentVariable("PATHEXT");
if (string.IsNullOrEmpty(pathExt))
{
// XP's system default value for PATHEXT system variable
pathExt = ".com;.exe;.bat;.cmd;.vbs;.vbe;.js;.jse;.wsf;.wsh";
}
string[] pathExtSegments = pathExt.Split(new string[] { ";" }, StringSplitOptions.RemoveEmptyEntries);
// if command already has an extension.
if (pathExtSegments.Any(ext => command.EndsWith(ext, StringComparison.OrdinalIgnoreCase)))
{
try
{
matches = Directory.GetFiles(pathSegment, command);
}
catch (UnauthorizedAccessException ex)
{
trace?.Info("Ignore UnauthorizedAccess exception during Which.");
trace?.Verbose(ex.ToString());
}
if (matches != null && matches.Length > 0)
{
trace?.Info($"Location: '{matches.First()}'");
return(matches.First());
}
}
else
{
string searchPattern;
searchPattern = StringUtil.Format($"{command}.*");
try
{
matches = Directory.GetFiles(pathSegment, searchPattern);
}
catch (UnauthorizedAccessException ex)
{
trace?.Info("Ignore UnauthorizedAccess exception during Which.");
trace?.Verbose(ex.ToString());
}
if (matches != null && matches.Length > 0)
{
// add extension.
for (int i = 0; i < pathExtSegments.Length; i++)
{
string fullPath = Path.Combine(pathSegment, $"{command}{pathExtSegments[i]}");
if (matches.Any(p => p.Equals(fullPath, StringComparison.OrdinalIgnoreCase)))
{
trace?.Info($"Location: '{fullPath}'");
return(fullPath);
}
}
}
}
#else
try
{
matches = Directory.GetFiles(pathSegment, command);
}
catch (UnauthorizedAccessException ex)
{
trace?.Info("Ignore UnauthorizedAccess exception during Which.");
trace?.Verbose(ex.ToString());
}
if (matches != null && matches.Length > 0)
{
trace?.Info("Location: '{matches.First()}'");
return(matches.First());
}
#endif
}
}
trace?.Info("Not found.");
if (require)
{
throw new FileNotFoundException(
message: StringUtil.Loc("FileNotFound", command),
fileName: command);
}
return(null);
}