Fix CI workflow: resolve artifact conflict and enable runs on every commit

[Copilot]

Problem

The CI workflow had three issues:

1. Artifact naming conflict (409 error): Both luatex and xetex jobs in the matrix strategy were trying to upload artifacts with the same name tonpkg-artifacts, causing a conflict error: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

2. CI only ran on tags: The workflow was configured to only run on push events for tags (v*.*.*), not on regular commits to branches

3. Unnecessary xetex artifacts: The xetex engine is used for compatibility testing only, but its artifacts were being uploaded alongside luatex artifacts

Solution

Made minimal changes to .github/workflows/ci.yml:

1. Fixed artifact conflict by conditionally uploading only luatex artifacts

Added if: matrix.engine == 'luatex' to the artifact upload step. Now only the luatex job uploads artifacts, while xetex still runs for compatibility testing.

- name: Upload artifacts
  if: matrix.engine == 'luatex'
  uses: actions/upload-artifact@v4

2. Enabled CI on every commit

Updated the push trigger to include all branches:

on:
  push:
    branches:
      - "**"
    tags:
      - "v*.*.*"

3. Release behavior unchanged

The release job still only runs on version tags (v*..) thanks to the existing condition: if: startsWith(github.ref, 'refs/tags/')

Result

• ✅ CI runs on every commit to any branch
• ✅ Both engines (luatex and xetex) run tests for compatibility verification
• ✅ Only luatex artifacts are uploaded (no more conflicts)
• ✅ GitHub releases are only created when pushing version tags (v*..)

Original prompt

Dernier problème dans le CI: With the provided path, there will be 2 files uploaded
Artifact name is valid!
Root directory input is valid!
Error: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run les deux engines se marchent sur les doigts, C'est uniquement l'artifact de luatex que je veux garder pour la suite, celui de xetex est pour un test de compatibilité. Aussi j'aimerais que le CI se lance pour chaque commit mais sans faire de relase. La release se fait que sur les tags vx.y.z tu me propose un update?

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