Build dev documentation

.github/workflows/build_dev_documentation.yml

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+name: Build dev documentation
+
+on:
+  pull_request:
+
+
+jobs:
+  build_and_package:
+    runs-on: [self-hosted, doc-builder]
+    container:
+      image: huggingface/doc-builder-transformers
+      options: "-v /home/github_actions:/mnt"
+    env:
+      PR_NUMBER: ${{ github.event.number }}
+      EVENT_CONTEXT: ${{ toJSON(github.event) }}
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          repository: 'huggingface/doc-builder'
+          path: doc-builder
+
+      - uses: actions/checkout@v2
+        with:
+          repository: 'huggingface/transformers'
+          path: transformers
+
+      - uses: actions/checkout@v2
+        with:
+          repository: 'huggingface/notebooks'
+          path: notebooks
+
+      - name: Set env
+        run: echo "WRITE=$(cat /mnt/WRITE)" >> $GITHUB_ENV
+
+      - name: Comment PR
+        uses: thollander/actions-comment-pull-request@v1
+        if: github.event.action == 'opened' || github.event.action == 'reopened'
+
+        with:
+          message: 'Thank you for your PR! The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_15110). All of your documentation changes will be reflected on that endpoint.'
+          GITHUB_TOKEN: ${{ env.WRITE }}
+
+      - name: Loading cache.
+        uses: actions/cache@v2
+        id: cache
+        with:
+          path: ~/.cache/pip
+          key: v1-test_build_doc
+          restore-keys: |
+            v1-test_build_doc-${{ hashFiles('setup.py') }}
+            v1-test_build_doc
+
+      - name: Setup environment
+        run: |
+          apt-get -y update && apt-get install -y libsndfile1-dev
+
+          pip install git+https://github.com/huggingface/doc-builder
+          cd transformers
+          pip install .[dev]
+          cd ..
+
+          export TORCH_VERSION=$(python -c "from torch import version; print(version.__version__.split('+')[0])")
+          pip install torch-scatter -f https://data.pyg.org/whl/torch-${TORCH_VERSION}+cpu.html
+
+          pip install torchvision
+          python -m pip install 'git+https://github.com/facebookresearch/detectron2.git'
+
+          apt install -y tesseract-ocr
+          pip install pytesseract
+          pip install pytorch-quantization --extra-index-url https://pypi.ngc.nvidia.com
+          pip install https://github.com/kpu/kenlm/archive/master.zip
+
+      - name: Setup git
+        run: |
+          git config --global user.name "Hugging Face Doc Builder"
+          git config --global user.email docs@huggingface.co
+
+          cd doc-builder
+          git pull origin main
+          cd ..
+
+          cd notebooks
+          git pull origin master
+          cd ..
+          WRITE=`cat /mnt/WRITE`
+
+          rm -rf doc-build-dev
+          git clone https://HuggingFaceDocBuilder:$WRITE@github.com/huggingface/doc-build-dev
+
+      - name: Make documentation
+        run: |
+          doc-builder build transformers transformers/docs/source --build_dir doc-build-dev --notebook_dir notebooks/transformers_doc --clean --version pr_$PR_NUMBER
+
+      - name: Push to repositories
+        run: |
+          cd doc-build-dev
+          ls
+          git add .
+          git commit -m "Updated with commit ${{ github.sha }} See: https://github.com/huggingface/transformers/commit/${{ github.sha }}"
+          git push origin main

.github/workflows/delete_dev_documentation.yml

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+name: Delete dev documentation
+
+on:
+  pull_request:
+    types: [ closed ]
+
+
+jobs:
+  build_and_package:
+    runs-on: [self-hosted, doc-builder]
+    container:
+      image: huggingface/doc-builder-transformers
+      options: "-v /home/github_actions:/mnt"
+    env:
+      PR_NUMBER: ${{ github.event.number }}
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set env
+        run: echo "WRITE=$(cat /mnt/WRITE)" >> $GITHUB_ENV
+
+      - uses: actions/checkout@v2
+        with:
+          repository: 'huggingface/doc-build-dev'
+          path: doc-build-dev
+          token: ${{ env.WRITE }}
+
+      - name: Setup git
+        run: |
+          git config --global user.name "Hugging Face Doc Builder"
+          git config --global user.email docs@huggingface.co
+
+      - name: Push to repositories
+        run: |
+          cd doc-build-dev
+          ls
+          rm -rf transformers/pr_$PR_NUMBER
+          ls
+          git add .
+          git commit -m "Closed PR ${GITHUB_REF##*/}"
+          git push origin main
+
+      - name: Comment PR
+        uses: thollander/actions-comment-pull-request@v1
+        if: github.event.pull_request.merged == false
+
+        with:
+          message: 'Thank you for your PR. The documentation will now be removed from the staging environment - feel free to reopen this PR to recreate it.'
+          GITHUB_TOKEN: ${{ env.WRITE }}
+
+      - name: Comment PR
+        uses: thollander/actions-comment-pull-request@v1
+        if: github.event.pull_request.merged == true
+
+        with:
+          message: 'Great job merging this PR! the documentation will now be removed from the staging environment.'
+          GITHUB_TOKEN: ${{ env.WRITE }}