Add CI workflow to check for commonly misspelled words

On every push, pull request, and periodically, use the codespell-project/actions-codespell action to check for commonly
misspelled words.

In the event of a false positive, the problematic word should be added, in all lowercase, to the ignore-words-list field
of ./.codespellrc. Regardless of the case of the word in the false positive, it must be in all lowercase in the ignore
list. The ignore list is comma-separated with no spaces.

Author: per1234

.codespellrc

@@ -0,0 +1,8 @@
+# See: https://github.com/codespell-project/codespell#using-a-config-file
+[codespell]
+# In the event of a false positive, add the problematic word, in all lowercase, to a comma-separated list here:
+ignore-words-list = afterall
+builtin = clear,informal,en-GB_to_en-US
+check-filenames =
+check-hidden =
+skip = ./.git,./dist,./package-lock.json,./poetry.lock

.github/workflows/spell-check-task.yml

@@ -0,0 +1,36 @@
+name: Spell Check
+
+# See: https://docs.github.com/en/free-pro-team@latest/actions/reference/events-that-trigger-workflows
+on:
+  push:
+  pull_request:
+  schedule:
+    # Run every Tuesday at 8 AM UTC to catch new misspelling detections resulting from dictionary updates.
+    - cron: "0 8 * * TUE"
+  workflow_dispatch:
+  repository_dispatch:
+
+jobs:
+  spellcheck:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Install Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: "3.9"
+
+      - name: Install Poetry
+        run: pip install poetry
+
+      - name: Install Task
+        uses: arduino/actions/setup-taskfile@master
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          version: 3.x
+
+      - name: Spell check
+        run: task general:check-spelling

README.md

@@ -2,6 +2,7 @@
 
 [![Integration Tests status](https://github.com/arduino/setup-taskfile/actions/workflows/test-integration.yml/badge.svg)](https://github.com/arduino/setup-taskfile/actions/workflows/test-integration.yml)
 [![Check Action Metadata status](https://github.com/arduino/setup-taskfile/actions/workflows/check-action-metadata-task.yml/badge.svg)](https://github.com/arduino/setup-taskfile/actions/workflows/check-action-metadata-task.yml)
+[![Spell Check status](https://github.com/arduino/setup-taskfile/actions/workflows/spell-check.yml/badge.svg)](https://github.com/arduino/setup-taskfile/actions/workflows/spell-check.yml)
 [![Check License status](https://github.com/arduino/setup-taskfile/actions/workflows/check-license.yml/badge.svg)](https://github.com/arduino/setup-taskfile/actions/workflows/check-license.yml)
 
 This action makes the `task` binary available to Workflows.

Taskfile.yml

@@ -14,3 +14,15 @@ tasks:
     cmds:
       - wget --output-document={{ .ACTION_METADATA_SCHEMA_PATH }} https://json.schemastore.org/github-action
       - npx ajv-cli validate --strict=false -s {{ .ACTION_METADATA_SCHEMA_PATH }} -d "action.yml"
+
+  general:check-spelling:
+    desc: Check for commonly misspelled words
+    cmds:
+      - poetry install --no-root
+      - poetry run codespell
+
+  general:correct-spelling:
+    desc: Correct commonly misspelled words where possible
+    cmds:
+      - poetry install --no-root
+      - poetry run codespell --write-changes

poetry.lock

@@ -0,0 +1,11 @@
+[tool.poetry]
+name = "setup-taskfile"
+version = "0.0.0"
+description = "GitHub Actions action to install Task"
+authors = ["Arduino <[email protected]>"]
+
+[tool.poetry.dependencies]
+python = "^3.9"
+
+[tool.poetry.dev-dependencies]
+codespell = ">=2.0.0"