BUG: OBS go_modules service fails due to missing go.sum entries

[mantarimay]

Building the project in Open Build Service (OBS) using obs-service-go_modules fails because the released source archive contains an incomplete go.sum file.
As a result, go mod vendor fails, and the OBS service crashes with a misleading Python AttributeError, which hides the real Go error.

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To Reproduce

Steps to reproduce the behavior:

1. Use the matcha-0.13.4 source archive
2. Build it in openSUSE Open Build Service (OBS)
3. Enable the obs-service-go_modules source service
4. OBS automatically runs:

   go mod download
   go mod vendor

5. The build fails with multiple missing go.sum entries, and finally ends with a Python traceback

Expected behavior

• The project should build successfully with go mod vendor using a complete go.sum, or

• The failure should be reported clearly without crashing the OBS service

Actual behavior

• go mod vendor fails with multiple errors such as:

missing go.sum entry for module providing package github.com/charmbracelet/bubbletea

• After that, OBS crashes with:

AttributeError: 'NoneType' object has no attribute 'strip'

This makes debugging harder because the real cause of the failure is masked.

Logs

go: github.com/floatpane/matcha imports
github.com/charmbracelet/bubbletea: missing go.sum entry for module providing package github.com/charmbracelet/bubbletea
...
Traceback (most recent call last):
  File "/usr/lib/obs/service//go_modules", line 423, in main
  File "/usr/lib/obs/service//go_modules", line 369, in main
    cp = cmd_go_mod(["vendor"], go_mod_dir)
  File "/usr/lib/obs/service//go_modules", line 212, in cmd_go_mod
    log.error(cp.stderr.strip())
AttributeError: 'NoneType' object has no attribute 'strip'

Environment (please complete the following information):

• OS: openSUSE (Open Build Service)
• Go Version: OBS default (1.21 at time of build)

Additional context

• The root cause appears to be an incomplete go.sum in the matcha-0.13.4 release.

• Running go mod tidy locally resolves the issue.

• The Python traceback comes from obs-service-go_modules trying to call .strip() on a None stderr, which hides the real Go error.

[andrinoff]

The issue is that go mod download requires a go.sum file, which is a package-lock.json for JavaScript. It is unnecessary, unless a certain workflow requires it, therefore not included in the repo.

Correct commands run to install dependencies should be:

go mod tidy
go mod vendor # Optional, caches dependencies locally, i guess, openSuse needs it

1. Try the new installation commands
2. If fails, try upgrading to Go >=1.25

This was tested on Ubuntu 24.04.3 LTS and MacOS with Go >=1.25

P.S. Command to build should be (what GoReleaser does):

# For macOS ARM64 (Apple Silicon)
CGO_ENABLED=0 GOOS=darwin GOARCH=arm64 go build -trimpath -ldflags "-s -w -buildid= -X main.version=<version> -X main.commit=$(git rev-parse HEAD) -X main.date=$(date -u +%Y-%m-%dT%H:%M:%SZ)" -o matcha .

# For Linux AMD64
CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -trimpath -ldflags "-s -w -buildid= -X main.version=<version> -X main.commit=$(git rev-parse HEAD) -X main.date=$(date -u +%Y-%m-%dT%H:%M:%SZ)" -o matcha .

[mantarimay]

Why not just include the go.sum file in the Git repository? I can't upgrade Go on OBS (it would break OBS rules), even by modifying the JavaScript on the system.

[andrinoff]

I am currently busy, but you can open a PR with the go.sum file included.

go mod tidy

to get it.

make sure to remove it from .gitignore

[andrinoff]

@mantarimay added the go.sum file, try again, reopen if needed

[mantarimay]

Thank you! The Matcha build on OBS is successful now.
Appreciate the help and quick response — great work!
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