Merge pull request 'ci: checkout without external actions (no github.com)' (#43) from fix/ci-no-external-actions into master

Reviewed-on: #43

.gitea/workflows/ci.yml

@@ -13,14 +13,32 @@ jobs:
       image: node:20-bookworm-slim
 
     steps:
-      - name: Install git (needed by checkout)
+      - name: Install base tools (git + certs)
         run: |
+          set -e
           apt-get update
           apt-get install -y --no-install-recommends git ca-certificates
+          rm -rf /var/lib/apt/lists/*
           git --version
 
-      - name: Checkout
-        uses: actions/checkout@v4
+      - name: Checkout (from Gitea, no external actions)
+        env:
+          SERVER: ${{ github.server_url }}
+          REPO: ${{ github.repository }}
+          SHA: ${{ github.sha }}
+          TOKEN: ${{ secrets.CI_TOKEN }}
+        run: |
+          set -euo pipefail
+
+          if [ -n "${TOKEN:-}" ]; then
+            AUTH="$(printf "oauth2:%s" "$TOKEN" | base64 | tr -d '\n')"
+            git -c http.extraHeader="AUTHORIZATION: basic $AUTH" clone "$SERVER/$REPO.git" .
+          else
+            echo "ℹ️ CI_TOKEN absent → clone sans auth (repo public ou accès runner déjà OK)."
+            git clone "$SERVER/$REPO.git" .
+          fi
+
+          git checkout "$SHA"
 
       - name: Install deps
         run: npm ci