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Add infrastructure to check Markdown files for problems
Tasks and a GitHub Actions workflow are added for detecting problems in the project's Markdown files. On every push and pull request that affects relevant files, and periodically, the workflow will check the repository's Markdown files for problems: - Use markdownlint to check for common problems and formatting. - Use markdown-link-check to check for broken links. The Arduino tooling Markdown style is defined by the `.markdownlint.yml` file. In the event the repository contains externally maintained Markdown files, markdownlint can be configured to ignore them via a `.markdownlintignore` file: https://github.com/igorshubovych/markdownlint-cli#ignoring-files markdown-link-check is configured via the `.markdown-link-check.json` file: https://github.com/tcort/markdown-link-check#config-file-format
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‎.github/workflows/check-markdown-task.yml

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# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/check-markdown-task.md
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name: Check Markdown
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env:
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# See: https://github.com/actions/setup-node/#readme
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NODE_VERSION: 16.x
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# See: https://docs.github.com/actions/using-workflows/events-that-trigger-workflows
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on:
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create:
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push:
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paths:
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- ".github/workflows/check-markdown-task.ya?ml"
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- ".markdown-link-check.json"
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- "package.json"
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- "package-lock.json"
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- "Taskfile.ya?ml"
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- "**/.markdownlint*"
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- "**.mdx?"
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- "**.mkdn"
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- "**.mdown"
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- "**.markdown"
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pull_request:
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paths:
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- ".github/workflows/check-markdown-task.ya?ml"
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- ".markdown-link-check.json"
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- "package.json"
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- "package-lock.json"
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- "Taskfile.ya?ml"
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- "**/.markdownlint*"
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- "**.mdx?"
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- "**.mkdn"
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- "**.mdown"
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- "**.markdown"
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schedule:
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# Run every Tuesday at 8 AM UTC to catch breakage caused by external changes.
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- cron: "0 8 * * TUE"
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workflow_dispatch:
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repository_dispatch:
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jobs:
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run-determination:
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runs-on: ubuntu-latest
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permissions: {}
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outputs:
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result: ${{ steps.determination.outputs.result }}
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steps:
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- name: Determine if the rest of the workflow should run
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id: determination
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run: |
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RELEASE_BRANCH_REGEX="^refs/heads/v[0-9]+$"
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# The `create` event trigger doesn't support `branches` filters, so it's necessary to use Bash instead.
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if [[
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"${{ github.event_name }}" != "create" ||
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"${{ github.ref }}" =~ $RELEASE_BRANCH_REGEX
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]]; then
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# Run the other jobs.
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RESULT="true"
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else
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# There is no need to run the other jobs.
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RESULT="false"
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fi
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echo "result=$RESULT" >> $GITHUB_OUTPUT
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lint:
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needs: run-determination
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if: needs.run-determination.outputs.result == 'true'
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runs-on: ubuntu-latest
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permissions:
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contents: read
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steps:
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- name: Checkout repository
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uses: actions/checkout@v4
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- name: Setup Node.js
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uses: actions/setup-node@v4
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with:
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node-version: ${{ env.NODE_VERSION }}
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- name: Initialize markdownlint-cli problem matcher
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uses: xt0rted/markdownlint-problem-matcher@v2
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- name: Install Task
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uses: arduino/setup-task@v1
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with:
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repo-token: ${{ secrets.GITHUB_TOKEN }}
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version: 3.x
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- name: Lint
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run: task markdown:lint
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links:
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needs: run-determination
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if: needs.run-determination.outputs.result == 'true'
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runs-on: ubuntu-latest
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permissions:
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contents: read
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steps:
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- name: Checkout repository
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uses: actions/checkout@v4
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- name: Setup Node.js
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uses: actions/setup-node@v4
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with:
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node-version: ${{ env.NODE_VERSION }}
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- name: Install Task
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uses: arduino/setup-task@v1
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with:
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repo-token: ${{ secrets.GITHUB_TOKEN }}
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version: 3.x
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- name: Check links
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run: task --silent markdown:check-links

‎.markdown-link-check.json

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{
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"httpHeaders": [
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{
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"urls": ["https://docs.github.com/"],
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"headers": {
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"Accept-Encoding": "gzip, deflate, br"
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}
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}
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],
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"retryOn429": true,
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"retryCount": 3,
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"aliveStatusCodes": [200, 206]
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}

‎.markdownlint.yml

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# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-markdown/.markdownlint.yml
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# See: https://github.com/DavidAnson/markdownlint/blob/main/doc/Rules.md
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# The code style defined in this file is the official standardized style to be used in all Arduino projects and should
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# not be modified.
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# Note: Rules disabled solely because they are redundant to Prettier are marked with a "Prettier" comment.
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default: false
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MD001: false
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MD002: false
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MD003: false # Prettier
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MD004: false # Prettier
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MD005: false # Prettier
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MD006: false # Prettier
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MD007: false # Prettier
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MD008: false # Prettier
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MD009:
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br_spaces: 0
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strict: true
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list_item_empty_lines: false # Prettier
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MD010: false # Prettier
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MD011: true
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MD012: false # Prettier
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MD013: false
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MD014: false
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MD018: true
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MD019: false # Prettier
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MD020: true
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MD021: false # Prettier
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MD022: false # Prettier
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MD023: false # Prettier
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MD024: false
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MD025:
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level: 1
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front_matter_title: '^\s*"?title"?\s*[:=]'
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MD026: false
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MD027: false # Prettier
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MD028: false
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MD029:
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style: one
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MD030:
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ul_single: 1
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ol_single: 1
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ul_multi: 1
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ol_multi: 1
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MD031: false # Prettier
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MD032: false # Prettier
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MD033: false
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MD034: false
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MD035: false # Prettier
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MD036: false
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MD037: true
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MD038: true
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MD039: true
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MD040: false
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MD041: false
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MD042: true
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MD043: false
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MD044: false
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MD045: true
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MD046:
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style: fenced
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MD047: false # Prettier

‎.markdownlintignore

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# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-markdown/.markdownlintignore
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.licenses/
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__pycache__/
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node_modules/

‎README.md

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# `arduino/report-size-deltas` action
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[![Check Markdown status](https://github.com/arduino/report-size-deltas/actions/workflows/check-markdown-task.yml/badge.svg)](https://github.com/arduino/report-size-deltas/actions/workflows/check-markdown-task.yml)
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[![Check npm status](https://github.com/arduino/report-size-deltas/actions/workflows/check-npm-task.yml/badge.svg)](https://github.com/arduino/report-size-deltas/actions/workflows/check-npm-task.yml)
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[![Check Poetry status](https://github.com/arduino/report-size-deltas/actions/workflows/check-poetry-task.yml/badge.svg)](https://github.com/arduino/report-size-deltas/actions/workflows/check-poetry-task.yml)
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[![Check Python status](https://github.com/arduino/report-size-deltas/actions/workflows/check-python-task.yml/badge.svg)](https://github.com/arduino/report-size-deltas/actions/workflows/check-python-task.yml)

‎Taskfile.yml

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deps:
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- task: npm:validate
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- task: general:check-spelling
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- task: markdown:check-links
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- task: markdown:lint
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- task: npm:validate
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- task: poetry:validate
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- task: python:lint
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desc: Make automated corrections to the project's files
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deps:
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- task: general:correct-spelling
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- task: markdown:fix
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- task: poetry:sync
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- task: python:format
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docs:generate:
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desc: Create all generated documentation content
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# This is an "umbrella" task used to call any documentation generation processes the project has.
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# It can be left empty if there are none.
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# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/spell-check-task/Taskfile.yml
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general:check-spelling:
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desc: Check for commonly misspelled words
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cmds:
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- poetry run codespell --write-changes
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# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-markdown-task/Taskfile.yml
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markdown:check-links:
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desc: Check for broken links
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vars:
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# The command is defined in a Taskfile variable to allow it to be broken into multiple lines for readability.
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# This can't be done in the `cmd` object of the Taskfile because `npx --call` uses the native shell, which causes
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# standard newline escaping syntax to not work when the task is run on Windows.
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#
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# Using -regex instead of -name to avoid Task's behavior of globbing even when quoted on Windows
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# The odd method for escaping . in the regex is required for windows compatibility because mvdan.cc/sh gives
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# \ characters special treatment on Windows in an attempt to support them as path separators.
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#
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# prettier-ignore
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CHECK_LINKS_COMMAND:
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"
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find . \
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-type d -name \".git\" -prune -o \
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-type d -name \".licenses\" -prune -o \
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-type d -name \"__pycache__\" -prune -o \
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-type d -name \"node_modules\" -prune -o \
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-regex \".*[.]md\" \
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-exec \
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markdown-link-check \
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--quiet \
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--config \"./.markdown-link-check.json\" \
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\\{\\} \
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+
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"
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deps:
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- task: docs:generate
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- task: npm:install-deps
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cmds:
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- |
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npx \
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--package=markdown-link-check \
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--call='{{.CHECK_LINKS_COMMAND}}'
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# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-markdown-task/Taskfile.yml
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markdown:fix:
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desc: Automatically correct linting violations in Markdown files where possible
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deps:
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- task: npm:install-deps
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cmds:
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- npx markdownlint-cli --fix "**/*.md"
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# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-markdown-task/Taskfile.yml
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markdown:lint:
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desc: Check for problems in Markdown files
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deps:
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- task: npm:install-deps
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cmds:
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- npx markdownlint-cli "**/*.md"
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# Parameter variables:
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# - PROJECT_PATH: path of the npm-managed project. Default value: "./"
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# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/npm-task/Taskfile.yml

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