chore: Add Taskfile tasks to lint YAML files.

.gitignore

@@ -0,0 +1,3 @@
+# Build-related directories and files
+.task/
+target/

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "tools/yscope-dev-utils"]
+	path = tools/yscope-dev-utils
+	url = https://github.com/y-scope/yscope-dev-utils.git

README.md

@@ -0,0 +1,39 @@
+# log4j2-appenders
+This is a repository for a set of useful [Log4j 2][log4j2] appenders.
+
+## Contributing
+Follow the steps below to develop and contribute to the project.
+
+## Set up
+Initialize and update the submodules:
+```shell
+git submodule update --init --recursive
+```
+
+## Linting
+Before submitting a pull request, ensure you’ve run the linting [commands](#running-the-linters)
+below and either fixed any violations or suppressed the warnings.
+
+### Requirements
+* Python 3.10 or higher
+* [Task] 3.38.0 or higher
+
+### Adding files
+Certain file types need to be added to our linting rules manually:
+
+* If adding a **YAML** file (regardless of its extension), add it as an argument to the `yamllint`
+  command in [lint-tasks.yaml](lint-tasks.yaml).
+
+### Running the linters
+To run all linting checks:
+```shell
+task lint:check
+```
+
+To run all linting checks AND automatically fix any fixable issues:
+```shell
+task lint:fix
+```
+
+[log4j2]: https://logging.apache.org/log4j/2.x/index.html
+[Task]: https://taskfile.dev

lint-requirements.txt

@@ -0,0 +1 @@
+yamllint>=1.35.1

lint-tasks.yaml

@@ -0,0 +1,58 @@
+version: "3"
+
+vars:
+  G_LINT_VENV_DIR: "{{.G_BUILD_DIR}}/lint-venv"
+  G_LINT_VENV_CHECKSUM_FILE: "{{.G_BUILD_DIR}}/lint#venv.md5"
+
+tasks:
+  check:
+    cmds:
+      - task: "yml-check"
+
+  fix:
+    cmds:
+      - task: "yml-fix"
+
+  yml:
+    aliases:
+      - "yml-check"
+      - "yml-fix"
+    deps: ["venv"]
+    cmds:
+      - |-
+        . "{{.G_LINT_VENV_DIR}}/bin/activate"
+        yamllint \
+          --config-file "tools/yscope-dev-utils/lint-configs/.yamllint.yml" \
+          --strict \
+          .github/ \
+          lint-tasks.yaml \
+          taskfile.yaml
+
+  venv:
+    internal: true
+    vars:
+      CHECKSUM_FILE: "{{.G_LINT_VENV_CHECKSUM_FILE}}"
+      OUTPUT_DIR: "{{.G_LINT_VENV_DIR}}"
+    sources:
+      - "{{.ROOT_DIR}}/taskfile.yaml"
+      - "{{.TASKFILE}}"
+      - "lint-requirements.txt"
+    generates: ["{{.CHECKSUM_FILE}}"]
+    run: "once"
+    deps:
+      - ":init"
+      - task: ":utils:validate-checksum"
+        vars:
+          CHECKSUM_FILE: "{{.CHECKSUM_FILE}}"
+          DATA_DIR: "{{.OUTPUT_DIR}}"
+    cmds:
+      - task: ":utils:create-venv"
+        vars:
+          LABEL: "lint"
+          OUTPUT_DIR: "{{.OUTPUT_DIR}}"
+          REQUIREMENTS_FILE: "lint-requirements.txt"
+      # This command must be last
+      - task: ":utils:compute-checksum"
+        vars:
+          DATA_DIR: "{{.OUTPUT_DIR}}"
+          OUTPUT_FILE: "{{.CHECKSUM_FILE}}"

taskfile.yaml

@@ -0,0 +1,19 @@
+version: "3"
+
+includes:
+  lint: "lint-tasks.yaml"
+  utils: "tools/yscope-dev-utils/taskfiles/utils.yml"
+
+vars:
+  G_BUILD_DIR: "{{.ROOT_DIR}}/target"
+
+tasks:
+  clean:
+    cmds:
+      - "rm -rf '{{.G_BUILD_DIR}}'"
+
+  init:
+    internal: true
+    silent: true
+    run: "once"
+    cmds: ["mkdir -p '{{.G_BUILD_DIR}}'"]