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Initial implementation (#3)
The initial implementation of a native (non-shimmed) libcnb.rs-based Python CNB.
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‎.github/CODEOWNERS‎

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* @heroku/languages

‎.github/dependabot.yml‎

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version: 2
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updates:
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- package-ecosystem: "cargo"
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directory: "/"
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schedule:
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interval: "monthly"
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- package-ecosystem: "github-actions"
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directory: "/"
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schedule:
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interval: "monthly"

‎.github/workflows/check_changelog.yml‎

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name: Check Changelog
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on:
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pull_request:
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types: [opened, reopened, labeled, unlabeled, synchronize]
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permissions:
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contents: read
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jobs:
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check-changelog:
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runs-on: ubuntu-latest
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if: |
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!contains(github.event.pull_request.labels.*.name, 'skip changelog') &&
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!contains(github.event.pull_request.labels.*.name, 'dependencies')
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steps:
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- name: Checkout
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uses: actions/checkout@v3
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- name: Check that CHANGELOG is touched
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run: |
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git fetch origin ${{ github.base_ref }} --depth 1 && \
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git diff remotes/origin/${{ github.base_ref }} --name-only | grep CHANGELOG.md

‎.github/workflows/ci.yml‎

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name: CI
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on:
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push:
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# Avoid duplicate builds on PRs.
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branches:
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- main
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pull_request:
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permissions:
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contents: read
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env:
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CARGO_TERM_COLOR: always
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jobs:
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lint:
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runs-on: ubuntu-latest
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steps:
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- name: Checkout
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uses: actions/checkout@v3
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- name: Update Rust toolchain
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run: rustup update
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- name: Rust Cache
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uses: Swatinem/rust-cache@v2.2.1
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- name: Clippy
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run: cargo clippy --all-targets --locked -- --deny warnings
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- name: rustfmt
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run: cargo fmt -- --check
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unit-test:
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runs-on: ubuntu-latest
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steps:
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- name: Checkout
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uses: actions/checkout@v3
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- name: Update Rust toolchain
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run: rustup update
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- name: Rust Cache
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uses: Swatinem/rust-cache@v2.2.1
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- name: Run unit tests
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run: cargo test --locked
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integration-test:
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runs-on: ubuntu-latest
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strategy:
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fail-fast: false
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matrix:
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builder: ["builder:22", "buildpacks:20"]
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env:
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INTEGRATION_TEST_CNB_BUILDER: heroku/${{ matrix.builder }}
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steps:
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- name: Checkout
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uses: actions/checkout@v3
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- name: Install musl-tools
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run: sudo apt-get install musl-tools --no-install-recommends
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- name: Update Rust toolchain
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run: rustup update
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- name: Install Rust linux-musl target
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run: rustup target add x86_64-unknown-linux-musl
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- name: Rust Cache
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uses: Swatinem/rust-cache@v2.2.1
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- name: Install Pack CLI
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uses: buildpacks/github-actions/setup-pack@v5.0.1
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- name: Run integration tests
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# Runs only tests annotated with the `ignore` attribute (which in this repo, are the integration tests).
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run: cargo test --locked -- --ignored --test-threads 5

‎.github/workflows/release.yml‎

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name: Release Buildpack
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on:
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workflow_dispatch:
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permissions:
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contents: write
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env:
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BUILDPACK_DOCKER_REPO: docker.io/heroku/buildpack-python
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CARGO_TERM_COLOR: always
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jobs:
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# Releases the buildpack to Docker Hub and registers it with the CNB Buildpack Registry.
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# This release process intentionally does not create a .cnb file release for now, since
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# there are currently no use-cases that need it for Python.
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release:
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name: Release heroku/python
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runs-on: ubuntu-latest
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steps:
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# Setup
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- name: Checkout
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uses: actions/checkout@v3
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- name: Install musl-tools
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run: sudo apt-get install musl-tools --no-install-recommends
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- name: Update Rust toolchain
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run: rustup update
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- name: Install Rust linux-musl target
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run: rustup target add x86_64-unknown-linux-musl
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- name: Rust Cache
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uses: Swatinem/rust-cache@v2.2.1
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- name: Install libcnb-cargo
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run: cargo install libcnb-cargo
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- name: Install Pack CLI
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uses: buildpacks/github-actions/setup-pack@v5.0.1
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- name: Install yj and crane
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uses: buildpacks/github-actions/setup-tools@v5.0.1
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- name: Login to Docker Hub
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uses: docker/login-action@v2
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with:
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registry: docker.io
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username: ${{ secrets.DOCKER_HUB_USER }}
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password: ${{ secrets.DOCKER_HUB_TOKEN }}
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# Build
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- name: Compile the buildpack
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run: cargo libcnb package --release
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# Publish
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- name: Read buildpack metadata
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run: |
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echo "buildpack_id=$(yj -t < buildpack.toml | jq -r .buildpack.id)" >> $GITHUB_ENV
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echo "buildpack_version=$(yj -t < buildpack.toml | jq -r .buildpack.version)" >> $GITHUB_ENV
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- name: Check version is unique on Docker Hub
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run: |
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if docker manifest inspect "${{ env.BUILDPACK_DOCKER_REPO }}:${{ env.buildpack_version }}" > /dev/null; then
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echo "Duplicate version found on Docker Hub ${{ env.BUILDPACK_DOCKER_REPO }}:${{ env.buildpack_version }}"
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exit 1
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fi
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- name: Publish the buildpack to Docker Hub
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run: pack buildpack package --path target/buildpack/release/heroku_python --publish "${{ env.BUILDPACK_DOCKER_REPO }}:${{ env.buildpack_version }}"
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- name: Calculate the buildpack image digest
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run: echo "buildpack_digest=$(crane digest ${{ env.BUILDPACK_DOCKER_REPO }}:${{ env.buildpack_version }})" >> $GITHUB_ENV
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- name: Register the new version with the CNB Buildpack Registry
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uses: docker://ghcr.io/buildpacks/actions/registry/request-add-entry:5.0.1
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with:
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token: ${{ secrets.CNB_REGISTRY_RELEASE_BOT_GITHUB_TOKEN }}
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id: ${{ env.buildpack_id }}
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version: ${{ env.buildpack_version }}
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address: ${{ env.BUILDPACK_DOCKER_REPO }}@${{ env.buildpack_digest }}
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- name: Create GitHub release
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uses: actions/create-release@v1
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env:
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GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
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with:
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tag_name: v${{ env.buildpack_version }}
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release_name: v${{ env.buildpack_version }}
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body: |
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See the [CHANGELOG](./CHANGELOG.md) for details.
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draft: false

‎.gitignore‎

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__pycache__/
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target/
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.DS_Store

‎.vscode/extensions.json‎

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{
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"recommendations": ["rust-lang.rust-analyzer"],
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}

‎.vscode/settings.json‎

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{
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"rust-analyzer.check.command": "clippy",
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"rust-analyzer.imports.granularity.enforce": true,
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"rust-analyzer.imports.granularity.group": "module",
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"rust-analyzer.imports.prefix": "crate",
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}

‎CHANGELOG.md‎

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# Changelog
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All notable changes to this project will be documented in this file.
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The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
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and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
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## [Unreleased]
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### Added
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- Initial implementation.

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