public async Task <TargetTriple> GetHostTargetTripleAsync()
{
var result = await CommandHelper.RunAsync(RustcExecutable, "-vV");
Match hostMatch = Regex.Match(result.Output, "^host:\\s*(.+)$", RegexOptions.Multiline);
if (hostMatch.Groups.Count < 2)
{
return(null);
}
return(TargetTriple.Create(hostMatch.Groups[1].Value.TrimEnd()));
}
private static IEnumerable <TargetTriple> SniffTargets(string installPath)
{
// This path is used in the installers for versions < 1.6
string oldRoot = Path.Combine(installPath, "bin", "rustlib");
// This path is used in the installers >= 1.6
string newRoot = Path.Combine(installPath, "lib", "rustlib");
var oldSourceTargets = GetTargetCandidates(oldRoot);
var newSourceTargets = GetTargetCandidates(newRoot);
return(oldSourceTargets
.Union(newSourceTargets)
.Select(name => TargetTriple.Create(name))
.Where(triple => triple != null));
}
private static bool CanBuildTarget(string exePath, string target)
{
if (!File.Exists(exePath))
{
return(false);
}
if (String.Equals(DefaultTarget, target, StringComparison.OrdinalIgnoreCase))
{
return(true);
}
TargetTriple triple = GetTarget(exePath);
return(triple != null &&
String.Equals(triple.ToString(), target, StringComparison.OrdinalIgnoreCase));
}
// TODO: this is wrong, because we're checking the host triple, not the availability of a target
public static TargetTriple GetTarget(string exePath)
{
if (!File.Exists(exePath))
{
return(null);
}
ProcessStartInfo psi = new ProcessStartInfo
{
UseShellExecute = false,
CreateNoWindow = true,
FileName = exePath,
RedirectStandardOutput = true,
Arguments = "-Vv",
StandardOutputEncoding = Encoding.UTF8,
StandardErrorEncoding = Encoding.UTF8
};
string verboseVersion;
try
{
Process proc = Process.Start(psi);
verboseVersion = proc.StandardOutput.ReadToEnd();
}
catch (Win32Exception)
{
return(null);
}
catch (IOException)
{
return(null);
}
Match hostMatch = Regex.Match(verboseVersion, "^host:\\s*(.+)$", RegexOptions.Multiline);
if (hostMatch.Groups.Count == 1)
{
return(null);
}
return(TargetTriple.Create(hostMatch.Groups[1].Value));
}
