internal static async Task TryAddFileAsync(
IMSBuildProjectSystem projectSystem,
string path,
Func <Task <Stream> > streamTaskFactory,
CancellationToken cancellationToken)
{
if (projectSystem.FileExistsInProject(path))
{
// file exists in project, ask user if he wants to overwrite or ignore
var conflictMessage = string.Format(CultureInfo.CurrentCulture,
Strings.FileConflictMessage, path, projectSystem.ProjectName);
var fileConflictAction = projectSystem.NuGetProjectContext.ResolveFileConflict(conflictMessage);
if (fileConflictAction == FileConflictAction.Overwrite ||
fileConflictAction == FileConflictAction.OverwriteAll)
{
// overwrite
projectSystem.NuGetProjectContext.Log(MessageLevel.Info, Strings.Info_OverwritingExistingFile, path);
using (var stream = await streamTaskFactory())
{
projectSystem.AddFile(path, stream);
}
}
else
{
// ignore
projectSystem.NuGetProjectContext.Log(MessageLevel.Warning, Strings.Warning_FileAlreadyExists, path);
}
}
else
{
projectSystem.AddFile(path, await streamTaskFactory());
}
}
internal static async Task DeleteFileSafeAsync(
string path,
Func <Task <Stream> > streamFactory,
IMSBuildProjectSystem projectSystem,
CancellationToken cancellationToken)
{
// Only delete the file if it exists and the checksum is the same
if (projectSystem.FileExistsInProject(path))
{
var fullPath = Path.Combine(projectSystem.ProjectFullPath, path);
if (await FileSystemUtility.ContentEqualsAsync(fullPath, streamFactory))
{
PerformSafeAction(() => projectSystem.RemoveFile(path), projectSystem.NuGetProjectContext);
}
else
{
// This package installed a file that was modified so warn the user
projectSystem.NuGetProjectContext.Log(MessageLevel.Warning, Strings.Warning_FileModified, fullPath);
}
}
}