Broken Add-in Repository

Description
When I try to install an add-in I get

Could not get information from repository: https://pintaproject.github.io/Pinta-Community-Addins/repository/Linux/main.mrep

I figured out that I could download addins from https://github.com/PintaProject/Pinta-Community-Addins/tree/gh-pages/repository/All and install them with the folder icon, and it's great that there's a fall-back!

Just in case it was somehow my network, I checked if I am able to open https://pintaproject.github.io/Pinta-Community-Addins/repository/Linux/main.mrep; I can:

main.mrep

<?xml version="1.0" encoding="utf-8"?>
<Repository xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Repository>
    <Url>root.mrep</Url>
    <LastModified>2025-05-05T02:16:05.9649189+00:00</LastModified>
  </Repository>
</Repository>

I am also able to download

root.mrep

<?xml version="1.0" encoding="utf-8"?>
<Repository xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Addin>
    <Url>WebP_0.2.1.mpack</Url>
    <Addin>
      <Id>WebP</Id>
      <Namespace />
      <Name>WebP</Name>
      <Version>0.2.1</Version>
      <BaseVersion />
      <Author>Pinta Project</Author>
      <Copyright />
      <Url>https://github.com/PintaProject/WebPAddin</Url>
      <Description>Provides support for the WebP image format.</Description>
      <Category>File Formats</Category>
      <Dependencies>
        <AddinDependency>
          <AddinId>Pinta</AddinId>
          <Version>1.5</Version>
        </AddinDependency>
      </Dependencies>
      <OptionalDependencies />
      <Properties>
        <Property name="Name">WebP</Property>
        <Property name="Description">Provides support for the WebP image format.</Property>
        <Property name="Author">Pinta Project</Property>
        <Property name="Url">https://github.com/PintaProject/WebPAddin</Property>
        <Property name="DownloadSize">5371</Property>
      </Properties>
    </Addin>
  </Addin>
</Repository>

so I don't think it's my network.

To Reproduce

Open Pinta
Click [Menu] > Add-ins > Add-in manager...

Additional Info

$ pinta --debug

(pinta:44169): Gtk-WARNING **: 20:05:31.591: GtkBox 0x55aaf5564f20 (box) reported min width 504 and natural width 500 in measure() with for_size=664; natural size must be >= min size
Error: Could not get information from repository: http://pintaproject.github.io/Pinta-Community-Addins/repository/Linux/main.mrep
System.InvalidOperationException: Nullable object must have a value.
   at System.Nullable`1.get_Value()
   at Mono.Addins.Setup.HttpClientDownloadFileRequest.get_ContentLength() in /Users/runner/work/1/s/Mono.Addins.Setup/Mono.Addins.Setup/DownloadFileRequest.cs:line 77
   at Mono.Addins.Setup.AddinStore.DownloadFile(IProgressMonitor monitor, String url) in /Users/runner/work/1/s/Mono.Addins.Setup/Mono.Addins.Setup/AddinStore.cs:line 650
   at Mono.Addins.Setup.AddinStore.DownloadObject(IProgressMonitor monitor, String url, Type type) in /Users/runner/work/1/s/Mono.Addins.Setup/Mono.Addins.Setup/AddinStore.cs:line 577
   at Mono.Addins.Setup.MonoAddinsRepositoryProvider.DownloadRepository(IProgressMonitor monitor, Uri absUri, AddinRepository rr) in /Users/runner/work/1/s/Mono.Addins.Setup/Mono.Addins.Setup/MonoAddinsRepositoryProvider.cs:line 40
   at Mono.Addins.Setup.RepositoryRegistry.UpdateRepository(IProgressMonitor monitor, Uri baseUri, RepositoryRecord rr) in /Users/runner/work/1/s/Mono.Addins.Setup/Mono.Addins.Setup/RepositoryRegistry.cs:line 362
Error: Could not get information from repository: http://pintaproject.github.io/Pinta-Community-Addins/repository/All/main.mrep
System.InvalidOperationException: Nullable object must have a value.
   at System.Nullable`1.get_Value()
   at Mono.Addins.Setup.HttpClientDownloadFileRequest.get_ContentLength() in /Users/runner/work/1/s/Mono.Addins.Setup/Mono.Addins.Setup/DownloadFileRequest.cs:line 77
   at Mono.Addins.Setup.AddinStore.DownloadFile(IProgressMonitor monitor, String url) in /Users/runner/work/1/s/Mono.Addins.Setup/Mono.Addins.Setup/AddinStore.cs:line 650
   at Mono.Addins.Setup.AddinStore.DownloadObject(IProgressMonitor monitor, String url, Type type) in /Users/runner/work/1/s/Mono.Addins.Setup/Mono.Addins.Setup/AddinStore.cs:line 577
   at Mono.Addins.Setup.MonoAddinsRepositoryProvider.DownloadRepository(IProgressMonitor monitor, Uri absUri, AddinRepository rr) in /Users/runner/work/1/s/Mono.Addins.Setup/Mono.Addins.Setup/MonoAddinsRepositoryProvider.cs:line 40
   at Mono.Addins.Setup.RepositoryRegistry.UpdateRepository(IProgressMonitor monitor, Uri baseUri, RepositoryRecord rr) in /Users/runner/work/1/s/Mono.Addins.Setup/Mono.Addins.Setup/RepositoryRegistry.cs:line 362

Version

ArchLinux, and I built Pinta from https://aur.archlinux.org/packages/pinta-git:

$ pacman -Qi pinta
Name            : pinta
Version         : 3.0.1-1

So that means this was built off 0ff7f12. But I had the same error before I upgraded; the last time I built Pinta was at 3.0.0.

Thanks for the report! I can reproduce as well - something must have changed on the add-in repository side of things, since it happens with the original 3.0 build as well (which definitely did work at the time of release)

Work around a bug in Mono.Addins with gzip responses

Would you be able to test out PR #1547? It's working for me in my tests but would be good to get some additional confirmation

The quickest way for me to test was just to build from the Arch build script:

Grabbed https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=pinta-git

Patched the build to use the PR

$ diff -u PKGBUILD.orig PKGBUILD
--- PKGBUILD.orig	2025-06-14 20:09:05.014367156 -0400
+++ PKGBUILD	2025-06-14 20:10:15.232867575 -0400
@@ -13,7 +13,7 @@
 makedepends=(autoconf-archive git intltool dotnet-sdk)
 provides=(pinta)
 conflicts=(pinta)
-source=("git+https://github.com/PintaProject/Pinta.git")
+source=("git+https://github.com/PintaProject/Pinta.git#branch=fix/addin-download")
 sha256sums=('SKIP')
 
 pkgver() {

makepkg -fsri to build. After a quick minute:

:: pinta-git-r4358.d6d862d6-1 and pinta-3.0.1-1 are in conflict. Remove pinta? [y/N] y
And then it works!

Nice! I'm glad you were able to pinpoint the problem so easily 🎉

great, thank you for confirming!

Work around a bug in Mono.Addins with gzip responses (PintaProject#1547)

Work around a bug in Mono.Addins with gzip responses (#1547)

Navigation Menu

Repository navigation

Broken Add-in Repository #1542

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Broken Add-in Repository #1542

Description

Activity

cameronwhite commented on Jun 14, 2025

cameronwhite commented on Jun 14, 2025

kousu commented on Jun 15, 2025

cameronwhite commented on Jun 15, 2025

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions