public static DelimitedFileDetectionResultWithColumns ReadManifestFileSystem(string fileName)
{
var posExt = fileName.LastIndexOf('.');
if (posExt == -1)
{
return(null);
}
var manifest = fileName.EndsWith(cCsvManifestExtension, StringComparison.OrdinalIgnoreCase)
? fileName
: fileName.Substring(0, posExt) + cCsvManifestExtension;
if (FileSystemUtils.FileExists(manifest))
{
var dataFile = manifest.ReplaceCaseInsensitive(cCsvManifestExtension, ".csv");
if (FileSystemUtils.FileExists(dataFile))
{
return(ReadManifestFromStream(FileSystemUtils.OpenRead(manifest), manifest, dataFile, string.Empty));
}
dataFile = manifest.ReplaceCaseInsensitive(cCsvManifestExtension, ".txt");
if (FileSystemUtils.FileExists(dataFile))
{
return(ReadManifestFromStream(FileSystemUtils.OpenRead(manifest), manifest, dataFile, string.Empty));
}
}
return(null);
}