autoformat code from command line

To format net core c# source, use https://github.com/dotnet/format

Install the tool as per the project readme.

I had a need to format some code files I was generating from Razor templates. I created a shell .CSProj file in the root of my output folder, using dotnet new console which gives you this basic file:

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp2.2</TargetFramework>
    <RootNamespace>dotnet_format</RootNamespace>
  </PropertyGroup>

</Project>

Then run dotnet format from a VS command prompt in that folder. It will recurse into sub-directories and format everything it finds. To format specific files you can provide a list of filenames with the --files switch.

Create your own tool. You can use EnvDTE, EnvDTE80 to create Visual Studio project and load the files you want to format on the fly. Once you are done delete the Visual Studio project. You can specify to not to show Visual Studio window while formatting. If you are interested let me know I can give you some code to make this work.

UPDATE: I am copying the code I have. I used it to format *.js files. I removed some code which you don't need. Feel free to ask if it doesn't work.

    //You need to make a reference to two dlls:
    envdte
    envdte80



    void FormatFiles(List<FileInfo> files)
    {       
        //If it throws exeption you may want to retry couple more times
        EnvDTE.Solution soln = System.Activator.CreateInstance(Type.GetTypeFromProgID("VisualStudio.Solution.11.0")) as EnvDTE.Solution;
        //try this if you have Visual Studio 2010
        //EnvDTE.Solution soln = System.Activator.CreateInstance(Type.GetTypeFromProgID("VisualStudio.Solution.10.0")) as EnvDTE.Solution;
        soln.DTE.MainWindow.Visible = false;
        EnvDTE80.Solution2 soln2 = soln as EnvDTE80.Solution2;
        //Creating Visual Studio project
        string csTemplatePath = soln2.GetProjectTemplate("ConsoleApplication.zip", "CSharp");
        soln.AddFromTemplate(csTemplatePath, tempPath, "FormattingFiles", false);
        //If it throws exeption you may want to retry couple more times
        Project project = soln.Projects.Item(1);

        foreach (FileInfo file in files)
        {
            ProjectItem addedItem;
            bool existingFile = false;
            int _try = 0;
            while (true)
            {            
                try
                {
                    string fileName = file.Name;
                    _try++;
                    if (existingFile)
                    {
                        fileName = file.Name.Substring(0, (file.Name.Length - file.Extension.Length) - 1);
                        fileName = fileName + "_" + _try + file.Extension;
                    }
                    addedItem = project.ProjectItems.AddFromTemplate(file.FullName, fileName);
                    existingFile = false;
                    break;
                }
                catch(Exception ex)
                {
                    if (ex.Message.Contains(file.Name) && ex.Message.Contains("already a linked file"))
                    {
                        existingFile = true;
                    }
                }
            }
            while (true)
            {
                //sometimes formatting file might throw an exception. Thats why I am using loop.
                //usually first time will work
                try
                {
                    addedItem.Open(Constants.vsViewKindCode);
                    addedItem.Document.Activate();
                    addedItem.Document.DTE.ExecuteCommand("Edit.FormatDocument");
                    addedItem.SaveAs(file.FullName);
                    break;
                }
                catch
                {
                    //repeat
                }
            }
        }
        try
        {
            soln.Close();
            soln2.Close();
            soln = null;
            soln2 = null;
        }
        catch
        {
            //for some reason throws exception. Not all the times.
            //if this doesn't closes the solution CleanUp() will take care of this thing
        }
        finally
        {
            CleanUp();
        }
    }   

    void CleanUp()
    {
        List<System.Diagnostics.Process> visualStudioProcesses = System.Diagnostics.Process.GetProcesses().Where(p => p.ProcessName.Contains("devenv")).ToList();
        foreach (System.Diagnostics.Process process in visualStudioProcesses)
        {
            if (process.MainWindowTitle == "")
            {
                process.Kill();
                break;
            }
        }
        tempPath = System.IO.Path.GetTempPath();
        tempPath = tempPath + "\\FormattingFiles";
        new DirectoryInfo(tempPath).Delete(true);
    } 

I hope this helps.

As a followup to Dilshod's post, if you're just looking to format a single file, here's a way of doing it that won't need a temporary path:

static void FormatFile(string file)
{
    EnvDTE.Solution soln = System.Activator.CreateInstance(
        Type.GetTypeFromProgID("VisualStudio.Solution.10.0")) as EnvDTE.Solution;

    soln.DTE.ItemOperations.OpenFile(file);

    TextSelection selection = soln.DTE.ActiveDocument.Selection as TextSelection;
    selection.SelectAll();
    selection.SmartFormat();

    soln.DTE.ActiveDocument.Save();
}

Note that "file" will need to have the full path on disk in all likelihood. Relative paths don't seem to work (though I didn't try all that hard).