`Unrecognized named-value: 'matrix'` / `Available expression contexts: github, inputs, vars, needs, strategy, matrix, secrets, steps, job, runner, env`

Tái hiện chẩn đoán trong ví dụ .github/workflows/ci.yml bằng VS Code 1.98.0 và GitHub Actions extension 0.27.1. Bắt đầu bằng cách lần theo quá trình xác thực các output ở cấp job có tham chiếu đến matrix; hoàn tất khi chẩn đoán phản ánh chính xác việc context đó có thể sử dụng được hay không và không còn mâu thuẫn với các context khả dụng được liệt kê.

Type: Bug

Create a .github/workflows/ci.yml file with:

name: CI
on:
  push:
  workflow_dispatch: 

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build-arch:
    name: Build
    permissions:
      contents: read
      packages: write
      attestations: write
      id-token: write

    strategy:
      fail-fast: false
      matrix:
        include:
          - os: ubuntu-24.04
            name: amd
          - os: ubuntu-24.04-arm
            name: arm

    runs-on: ${{ matrix.os }}
    outputs:
      attestation-url: ${{ steps.attestation.outputs.attestation-url }}
      ${{ matrix.name }}-attestation-url: ${{ steps.attestation.outputs.attestation-url }}
      my-matrix: ${{ matrix }}
      ${{ toJSON(matrix) }}: 'x'

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

      - name: Build and push Docker image
        id: push
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}

      - name: Generate artifact attestation
        id: attestation
        uses: actions/attest-build-provenance@v2
        with:
          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
          subject-digest: ${{ steps.push.outputs.digest }}
          push-to-registry: true

          
  combine-images:
    name: Combine images
    permissions:
      contents: read
      packages: write
      attestations: write
      id-token: write

    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

See a red-squiggly near ${{ matrix.name }}-attestation-url: ${{ steps.attestation.outputs.attestation-url }}

Hover over ${{ matrix.name }}

See:

Unrecognized named-value: 'matrix'
Available expression contexts: github, inputs, vars, needs, strategy, matrix, secrets, steps, job, runner, env

View problem shows:

Unrecognized named-value: 'matrix'

• If an expression is available, then it should be usable.
• If it isn't available, then it shouldn't be listed as available.

Extension version: 0.27.1
VS Code version: Code 1.98.0 (Universal) (6609ac3d66f4eade5cf376d1cb76f13985724bcb, 2025-03-04T21:06:18.612Z)
OS version: Darwin arm64 24.3.0
Modes:

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