Unhandled exception. System.IO.IOException: Read-only file system : '/{classname}.xml'

[lightxx]

on MacOS, this happens:

Discussed in #93

^{Originally posted by lightxx February 12, 2025}
when i run dotnet azure-apim-policy-compiler --s ./Ts.Apis.Policies --o . --format true I get

File UserDtoPolicy Processing
Unhandled exception. System.IO.IOException: Read-only file system : '/UserDtoPolicy.xml'
   at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirError)
   at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
   at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
   at System.IO.File.OpenHandle(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize)
   at System.IO.File.WriteToFile(String path, FileMode mode, String contents, Encoding encoding)
   at Program.<Main>$(String[] args) in C:\repos\experiments\apim-policy-toolkit\src\Compiling\Program.cs:line 67

where Ts.Apis.Policies/UserDtoPolicy.cs is one of my classes containing a policy.

% dotnet --version
8.0.302
% sw_vers -productVersion 
15.3

MacOS

[lightxx]

I see the problem is the outdated release package ... Will try to build from source using the latest commit in main tomorrow

[lightxx]

anyway, the problem is this line

azure-api-management-policy-toolkit/src/Compiling/Program.cs

Line 59 in 2c5ef98

string targetFolder = Path.GetFullPath(Path.Combine(options.OutputFolder, Path.GetFullPath(file).Split(Path.GetFullPath(options.SourceFolder))[1].Replace(Path.GetFileName(file), "")));

which always returns / on MacOS which is always readonly.

[lightxx]

Doesn't work on Windows either. I'm wondering if this thing works at all.

[Mielek]

Hello @lightxx ! Thank you for bringing this issue to our attention. We really appreciate your effort in doing that!

Could you please share class definition with Document attribute from UserDtoPolicy.cs? It would help me check why you are facing this issue.

We are now relying on the GitHub actions to run compiler on example project to check this code. I think we could extract it to test it in unit tests.