chore(ci): remove pull_request_target for external contributions

.github/actions/gpu_setup/action.yml

@@ -0,0 +1,63 @@
+name: Setup Cuda
+description: Setup Cuda on Hyperstack or GitHub instance
+
+inputs:
+  cuda-version:
+    description: Version of Cuda to use
+    required: true
+  gcc-version:
+    description: Version of GCC to use
+    required: true
+  cmake-version:
+    description: Version of cmake to use
+    default: 3.29.6
+  github-instance:
+    description: Instance is hosted on GitHub
+    default: 'false'
+
+runs:
+  using: "composite"
+  steps:
+    # Mandatory on hyperstack since a bootable volume is not re-usable yet.
+    - name: Install dependencies
+      shell: bash
+      run: |
+        sudo apt update
+        curl -fsSL https://apt.kitware.com/keys/kitware-archive-latest.asc | sudo gpg --dearmour -o /etc/apt/trusted.gpg.d/kitware.gpg
+        sudo chmod 644 /etc/apt/trusted.gpg.d/kitware.gpg
+        echo 'deb [signed-by=/etc/apt/trusted.gpg.d/kitware.gpg] https://apt.kitware.com/ubuntu/ jammy main' | sudo tee /etc/apt/sources.list.d/kitware.list >/dev/null
+        sudo apt update
+        sudo apt install -y cmake cmake-format libclang-dev
+
+    - name: Install CUDA
+      if: inputs.github-instance == 'true'
+      shell: bash
+      run: |
+        TOOLKIT_VERSION="$(echo ${{ inputs.cuda-version }} | sed 's/\(.*\)\.\(.*\)/\1-\2/')"
+        wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2204/x86_64/cuda-keyring_1.1-1_all.deb
+        sudo dpkg -i cuda-keyring_1.1-1_all.deb
+        sudo apt update
+        sudo apt -y install cuda-toolkit-${TOOLKIT_VERSION}
+
+    - name: Export CUDA variables
+      shell: bash
+      run: |
+        CUDA_PATH=/usr/local/cuda-${{ inputs.cuda-version }}
+        echo "CUDA_PATH=$CUDA_PATH" >> "${GITHUB_ENV}"
+        echo "PATH=$PATH:$CUDA_PATH/bin" >> "${GITHUB_PATH}"
+        echo "LD_LIBRARY_PATH=$CUDA_PATH/lib64:$LD_LIBRARY_PATH" >> "${GITHUB_ENV}"
+        echo "CUDA_MODULE_LOADER=EAGER" >> "${GITHUB_ENV}"
+
+    # Specify the correct host compilers
+    - name: Export gcc and g++ variables
+      shell: bash
+      run: |
+        {
+          echo "CC=/usr/bin/gcc-${{ inputs.gcc-version }}";
+          echo "CXX=/usr/bin/g++-${{ inputs.gcc-version }}";
+          echo "CUDAHOSTCXX=/usr/bin/g++-${{ inputs.gcc-version }}";
+        } >> "${GITHUB_ENV}"
+
+    - name: Check device is detected
+      shell: bash
+      run: nvidia-smi

.github/workflows/aws_tfhe_backward_compat_tests.yml

@@ -11,53 +11,26 @@ env:
   SLACK_ICON: https://pbs.twimg.com/profile_images/1274014582265298945/OjBKP9kn_400x400.png
   SLACK_USERNAME: ${{ secrets.BOT_USERNAME }}
   SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
-  MSG_MINIMAL: event,action url,commit
-  BRANCH: ${{ github.head_ref || github.ref }}
-  REF: ${{ github.event.pull_request.head.sha || github.sha }}
+  CHECKOUT_TOKEN: ${{ secrets.REPO_CHECKOUT_TOKEN || secrets.GITHUB_TOKEN }}
+  # Secrets will be available only to zama-ai organization members
+  SECRETS_AVAILABLE: ${{ secrets.JOB_SECRET != '' }}
+  EXTERNAL_CONTRIBUTION_RUNNER: "large_ubuntu_16"
 
 on:
   # Allows you to run this workflow manually from the Actions tab as an alternative.
   workflow_dispatch:
-  # Trigger pull_request event on CI files to be able to test changes before merging to main branch.
-  # Workflow would fail if changes come from a forked repository since secrets are not available with this event.
   pull_request:
-    paths:
-      - '.github/**'
-      - 'ci/**'
-  # General entry point for Zama's pull request as well as contribution from forks.
-  pull_request_target:
-    paths:
-      - '**'
-      - '!.github/**'
-      - '!ci/**'
 
 jobs:
-  check-ci-files:
-    uses: ./.github/workflows/check_ci_files_change.yml
-    with:
-      checkout_ref: ${{ github.event.pull_request.head.sha || github.sha }}
-    secrets:
-      REPO_CHECKOUT_TOKEN: ${{ secrets.REPO_CHECKOUT_TOKEN }}
-
-  # Fail if the triggering actor is not part of Zama organization.
-  # If pull_request_target is emitted and CI files have changed, skip this job. This would skip following jobs.
-  check-user-permission:
-    needs: check-ci-files
-    if: github.event_name != 'pull_request_target' ||
-      (github.event_name == 'pull_request_target' && needs.check-ci-files.outputs.ci_file_changed == 'false')
-    uses: ./.github/workflows/check_actor_permissions.yml
-    secrets:
-      TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
   setup-instance:
     name: Setup instance (backward-compat-tests)
-    needs: check-user-permission
     runs-on: ubuntu-latest
     outputs:
-      runner-name: ${{ steps.start-instance.outputs.label }}
+      runner-name: ${{ steps.start-remote-instance.outputs.label || steps.start-github-instance.outputs.runner_group }}
     steps:
-      - name: Start instance
-        id: start-instance
+      - name: Start remote instance
+        id: start-remote-instance
+        if: env.SECRETS_AVAILABLE == 'true'
         uses: zama-ai/slab-github-runner@79939325c3c429837c10d6041e4fd8589d328bac
         with:
           mode: start
@@ -67,6 +40,13 @@ jobs:
           backend: aws
           profile: cpu-small
 
+      # This instance will be spawned especially for pull-request from forked repository
+      - name: Start GitHub instance
+        id: start-github-instance
+        if: env.SECRETS_AVAILABLE == 'false'
+        run: |
+          echo "runner_group=${{ env.EXTERNAL_CONTRIBUTION_RUNNER }}" >> "$GITHUB_OUTPUT"
+
   backward-compat-tests:
     name: Backward compatibility tests
     needs: [ setup-instance ]
@@ -79,8 +59,7 @@ jobs:
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
         with:
           persist-credentials: 'false'
-          token: ${{ secrets.REPO_CHECKOUT_TOKEN }}
-          ref: ${{ env.REF }}
+          token: ${{ env.CHECKOUT_TOKEN }}
 
       - name: Install latest stable
         uses: dtolnay/rust-toolchain@a54c7afa936fefeb4456b2dd8068152669aa8203
@@ -131,8 +110,9 @@ jobs:
     needs: [ setup-instance, backward-compat-tests ]
     runs-on: ubuntu-latest
     steps:
-      - name: Stop instance
+      - name: Stop remote instance
         id: stop-instance
+        if: env.SECRETS_AVAILABLE == 'true'
         uses: zama-ai/slab-github-runner@79939325c3c429837c10d6041e4fd8589d328bac
         with:
           mode: stop

.github/workflows/aws_tfhe_fast_tests.yml

@@ -11,26 +11,16 @@ env:
   SLACK_ICON: https://pbs.twimg.com/profile_images/1274014582265298945/OjBKP9kn_400x400.png
   SLACK_USERNAME: ${{ secrets.BOT_USERNAME }}
   SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
-  MSG_MINIMAL: event,action url,commit
-  BRANCH: ${{ github.head_ref || github.ref }}
-  IS_PULL_REQUEST: ${{ github.event_name == 'pull_request' || github.event_name == 'pull_request_target' }}
-  REF: ${{ github.event.pull_request.head.sha || github.sha }}
+  IS_PULL_REQUEST: ${{ github.event_name == 'pull_request' }}
+  CHECKOUT_TOKEN: ${{ secrets.REPO_CHECKOUT_TOKEN || secrets.GITHUB_TOKEN }}
+  # Secrets will be available only to zama-ai organization members
+  SECRETS_AVAILABLE: ${{ secrets.JOB_SECRET != '' }}
+  EXTERNAL_CONTRIBUTION_RUNNER: "large_ubuntu_64-22.04"
 
 on:
   # Allows you to run this workflow manually from the Actions tab as an alternative.
   workflow_dispatch:
-  # Trigger pull_request event on CI files to be able to test changes before merging to main branch.
-  # Workflow would fail if changes come from a forked repository since secrets are not available with this event.
   pull_request:
-    paths:
-      - '.github/**'
-      - 'ci/**'
-  # General entry point for Zama's pull request as well as contribution from forks.
-  pull_request_target:
-    paths:
-      - '**'
-      - '!.github/**'
-      - '!ci/**'
 
 jobs:
   should-run:
@@ -69,8 +59,7 @@ jobs:
         with:
           fetch-depth: 0
           persist-credentials: 'false'
-          token: ${{ secrets.REPO_CHECKOUT_TOKEN }}
-          ref: ${{ env.REF }}
+          token: ${{ env.CHECKOUT_TOKEN }}
 
       - name: Check for file changes
         id: changed-files
@@ -137,34 +126,18 @@ jobs:
         run: |
           echo "any_changed=true" >> "$GITHUB_OUTPUT"
 
-  check-ci-files:
-    uses: ./.github/workflows/check_ci_files_change.yml
-    with:
-      checkout_ref: ${{ github.event.pull_request.head.sha || github.sha }}
-    secrets:
-      REPO_CHECKOUT_TOKEN: ${{ secrets.REPO_CHECKOUT_TOKEN }}
-
-  # Fail if the triggering actor is not part of Zama organization.
-  # If pull_request_target is emitted and CI files have changed, skip this job. This would skip following jobs.
-  check-user-permission:
-    needs: check-ci-files
-    if: github.event_name != 'pull_request_target' ||
-      (github.event_name == 'pull_request_target' && needs.check-ci-files.outputs.ci_file_changed == 'false')
-    uses: ./.github/workflows/check_actor_permissions.yml
-    secrets:
-      TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
   setup-instance:
     name: Setup instance (fast-tests)
     if: github.event_name == 'workflow_dispatch' ||
       (github.event_name != 'workflow_dispatch' && needs.should-run.outputs.any_file_changed == 'true')
-    needs: [ should-run, check-user-permission ]
+    needs: should-run
     runs-on: ubuntu-latest
     outputs:
-      runner-name: ${{ steps.start-instance.outputs.label }}
+      runner-name: ${{ steps.start-remote-instance.outputs.label || steps.start-github-instance.outputs.runner_group }}
     steps:
-      - name: Start instance
-        id: start-instance
+      - name: Start remote instance
+        id: start-remote-instance
+        if: env.SECRETS_AVAILABLE == 'true'
         uses: zama-ai/slab-github-runner@79939325c3c429837c10d6041e4fd8589d328bac
         with:
           mode: start
@@ -174,6 +147,13 @@ jobs:
           backend: aws
           profile: cpu-big
 
+      # This instance will be spawned especially for pull-request from forked repository
+      - name: Start GitHub instance
+        id: start-github-instance
+        if: env.SECRETS_AVAILABLE == 'false'
+        run: |
+          echo "runner_group=${{ env.EXTERNAL_CONTRIBUTION_RUNNER }}" >> "$GITHUB_OUTPUT"
+
   fast-tests:
     name: Fast CPU tests
     needs: [ should-run, setup-instance ]
@@ -186,8 +166,7 @@ jobs:
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
         with:
           persist-credentials: 'false'
-          token: ${{ secrets.REPO_CHECKOUT_TOKEN }}
-          ref: ${{ env.REF }}
+          token: ${{ env.CHECKOUT_TOKEN }}
 
       - name: Install latest stable
         uses: dtolnay/rust-toolchain@a54c7afa936fefeb4456b2dd8068152669aa8203
@@ -286,7 +265,7 @@ jobs:
           make test_zk
 
       - name: Slack Notification
-        if: ${{ failure() }}
+        if: ${{ failure() && env.SECRETS_AVAILABLE == 'true' }}
         continue-on-error: true
         uses: rtCamp/action-slack-notify@c33737706dea87cd7784c687dadc9adf1be59990
         env:
@@ -299,8 +278,9 @@ jobs:
     needs: [ setup-instance, fast-tests ]
     runs-on: ubuntu-latest
     steps:
-      - name: Stop instance
+      - name: Stop remote instance
         id: stop-instance
+        if: env.SECRETS_AVAILABLE == 'true'
         uses: zama-ai/slab-github-runner@79939325c3c429837c10d6041e4fd8589d328bac
         with:
           mode: stop