Bug: Add-Type needs write-access when compiling from source #7914
Description
I was curious to find this reddit post describing how Add-Type -Path ./path/to/sourcecode.cs fails with Access to the path './path/to/sourcecode.cs' is denied even though the process owner has read access to the file.
Upon granting write access to the file, the issue resolves.
Steps to reproduce
I've only tested this on Windows 10:
# Create empty source file
$srcFile = Get-Item $([System.IO.Path]::GetTempFileName()) |Rename-Item -NewName {$_.BaseName + '.cs'} -PassThru
# Write source code to file
@'
using System;
namespace TestAddType {
public class TestClass {}
}
'@ |Set-Content $srcFile -Encoding UTF8
# Mark source file ReadOnly
$srcFile.Attributes += 'ReadOnly'
# Attempt to compile from source
Add-Type -Path $srcFile.FullName
# Output new type literal
[TestAddType.TestClass]Expected behavior
IsPublic IsSerial Name BaseType
-------- -------- ---- --------
True False TestClass System.Object
Actual behavior
Add-Type : Access to the path 'C:\Users\iisresetme\AppData\Local\Temp\tmp2A59.cs' is denied.
At line:1 char:1
+ Add-Type -Path $srcFile.FullName
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Add-Type], UnauthorizedAccessException
+ FullyQualifiedErrorId : System.UnauthorizedAccessException,Microsoft.PowerShell.Commands.AddTypeCommand
Environment data
> $PSVersionTable
Name Value
---- -----
PSVersion 6.1.0
PSEdition Core
GitCommitId 6.1.0-57-g0f0c46dfe51440470b86f67b258e14aea32fa0aa
OS Microsoft Windows 10.0.17134
Platform Win32NT
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0