/// <remarks>Algorithm for Windows taken from https://stackoverflow.com/a/485516/7467292</remarks>
public static string GetRelativePath(string fromPath, string toPath)
{
if (OSTailoredCode.IsUnixHost)
{
#if true
return(PathManager.IsSubfolder(toPath, fromPath)
? "./" + OSTailoredCode.SimpleSubshell("realpath", $"--relative-to=\"{toPath}\" \"{fromPath}\"", $"invalid path {fromPath} or missing realpath binary")
: fromPath);
#else // written for Unix port but may be useful for .NET Core
// algorithm taken from https://stackoverflow.com/a/340454/7467292
var dirSepChar = Path.DirectorySeparatorChar;
var fromUri = new Uri(fromPath.EndsWith(dirSepChar.ToString()) ? fromPath : fromPath + dirSepChar);
var toUri = new Uri(toPath.EndsWith(dirSepChar.ToString()) ? toPath : toPath + dirSepChar);
if (fromUri.Scheme != toUri.Scheme)
{
return(toPath);
}
var relativePath = Uri.UnescapeDataString(fromUri.MakeRelativeUri(toUri).ToString());
return((toUri.Scheme.Equals(Uri.UriSchemeFile, StringComparison.OrdinalIgnoreCase)
? relativePath.Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar)
: relativePath
).TrimEnd(dirSepChar));
#endif
}
var path = new StringBuilder(260 /* = MAX_PATH */);
return(Win32.PathRelativePathTo(path, fromPath, GetPathAttribute(fromPath), toPath, GetPathAttribute(toPath))
? path.ToString()
: throw new ArgumentException("Paths must have a common prefix"));
}
// http://stackoverflow.com/questions/275689/how-to-get-relative-path-from-absolute-path
public static string GetRelativePath(string fromPath, string toPath)
{
if (!BizHawk.Common.PlatformLinkedLibSingleton.RunningOnUnix)
{
Win32.FileAttributes fromAttr = GetPathAttribute(fromPath);
Win32.FileAttributes toAttr = GetPathAttribute(toPath);
var path = new StringBuilder(260); // MAX_PATH
if (Win32.PathRelativePathTo(
path,
fromPath,
fromAttr,
toPath,
toAttr) == false)
{
throw new ArgumentException("Paths must have a common prefix");
}
return(path.ToString());
}
else
{
// mono doesnt know about shlwapi.dll that the code above tries to call
// it is available in WINE, but since this is the only call to that function,
// it's probably easier to get the relative path a different way
// this may actually work on windows as well - so maybe can replace the above when we move to .netcore
var dirSepChar = Path.DirectorySeparatorChar;
string from = !fromPath.EndsWith(dirSepChar.ToString())
? fromPath + dirSepChar
: fromPath;
string to = !toPath.EndsWith(dirSepChar.ToString())
? toPath + dirSepChar
: toPath;
Uri fromUri = new Uri(from);
Uri toUri = new Uri(to);
if (fromUri.Scheme != toUri.Scheme)
{
return(toPath);
}
Uri relativeUri = fromUri.MakeRelativeUri(toUri);
string relativePath = Uri.UnescapeDataString(relativeUri.ToString());
if (string.Equals(toUri.Scheme, Uri.UriSchemeFile, StringComparison.OrdinalIgnoreCase))
{
relativePath = relativePath.Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar);
}
return(relativePath.TrimEnd(dirSepChar));
}
}
/// <remarks>Algorithm for Windows taken from https://stackoverflow.com/a/485516/7467292</remarks>
public static string GetRelativePath(string fromPath, string toPath)
{
if (OSTailoredCode.CurrentOS == OSTailoredCode.DistinctOS.Windows)
{
Win32.FileAttributes fromAttr = GetPathAttribute(fromPath);
Win32.FileAttributes toAttr = GetPathAttribute(toPath);
var path = new StringBuilder(260); // MAX_PATH
if (Win32.PathRelativePathTo(
path,
fromPath,
fromAttr,
toPath,
toAttr) == false)
{
throw new ArgumentException("Paths must have a common prefix");
}
return(path.ToString());
}
#if true
return(PathManager.IsSubfolder(toPath, fromPath)
? "./" + OSTailoredCode.SimpleSubshell("realpath", $"--relative-to=\"{toPath}\" \"{fromPath}\"", $"invalid path {fromPath} or missing realpath binary")
: fromPath);
#else // written for Unix port but may be useful for .NET Core
// algorithm taken from https://stackoverflow.com/a/340454/7467292
var dirSepChar = Path.DirectorySeparatorChar;
string from = !fromPath.EndsWith(dirSepChar.ToString())
? fromPath + dirSepChar
: fromPath;
string to = !toPath.EndsWith(dirSepChar.ToString())
? toPath + dirSepChar
: toPath;
Uri fromUri = new Uri(from);
Uri toUri = new Uri(to);
if (fromUri.Scheme != toUri.Scheme)
{
return(toPath);
}
Uri relativeUri = fromUri.MakeRelativeUri(toUri);
string relativePath = Uri.UnescapeDataString(relativeUri.ToString());
if (string.Equals(toUri.Scheme, Uri.UriSchemeFile, StringComparison.OrdinalIgnoreCase))
{
relativePath = relativePath.Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar);
}
return(relativePath.TrimEnd(dirSepChar));
#endif
}
// http://stackoverflow.com/questions/275689/how-to-get-relative-path-from-absolute-path
public static string GetRelativePath(string fromPath, string toPath)
{
Win32.FileAttributes fromAttr = GetPathAttribute(fromPath);
Win32.FileAttributes toAttr = GetPathAttribute(toPath);
var path = new StringBuilder(260); // MAX_PATH
if (Win32.PathRelativePathTo(
path,
fromPath,
fromAttr,
toPath,
toAttr) == false)
{
throw new ArgumentException("Paths must have a common prefix");
}
return(path.ToString());
}
