Script migration fails if directory does not exist

[natemcmaster]

Steps to reproduce

dotnet ef migrations script -o ./some/folder/that/doesnt/exist.sql

The issue

System.IO.DirectoryNotFoundException: Could not find a part of the path 
'C:\Users\namc\dev\ef\some\folder\that\doesnt\exist.sql'.    at System.IO.Win32FileStream..ctor(String 
path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, 
FileStream parent) 

at System.IO.Win32FileSystem.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, FileStream parent) 
    at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options) 
    at System.IO.File.InternalWriteAllText(String path, String contents, Encoding encoding) 
   at System.IO.File.WriteAllText(String path, String contents, Encoding encoding)
    at Microsoft.EntityFrameworkCore.Tools.Cli.MigrationsScriptCommand.Execute(CommonOptions commonOptions, String from, String to, String output, Boolean idempotent, String context, String environment) 
    at Microsoft.EntityFrameworkCore.Tools.Cli.MigrationsScriptCommand.<>c__DisplayClass0_0.<Configure>b__0() 
    at Microsoft.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args)
    at Microsoft.EntityFrameworkCore.Tools.Cli.Program.Main(String[] args) 

Workaround

Make the directory manually first.