add yamllint

src/yamllint/README.md

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+
+# yamllint (yamllint)
+
+yamllint is a Python utility / library to sort imports alphabetically, and automatically separated into sections and by type.
+
+## Example Usage
+
+```json
+"features": {
+    "ghcr.io/devcontainers-contrib/features/yamllint:1": {
+        "version": "latest"
+    }
+}
+```
+
+## Options
+
+| Options Id | Description | Type | Default Value |
+|-----|-----|-----|-----|
+| version | Select the yamllint version you would like to install | string | latest |
+
+
+
+---
+
+_Note: This file was auto-generated from the [devcontainer-feature.json](https://github.com/devcontainers-contrib/features/blob/main/src/yamllint/devcontainer-feature.json).  Add additional notes to a `NOTES.md`._

src/yamllint/devcontainer-feature.json

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+{
+    "name": "yamllint",
+    "id": "yamllint",
+    "version": "1.0.1",
+    "description": "yamllint is a Python utility / library to sort imports alphabetically, and automatically separated into sections and by type.",
+    "documentationURL": "http://github.com/devcontainers-contrib/features/tree/main/src/yamllint",
+    "installAfter": [
+        "ghcr.io/devcontainers/features/python:latest"
+    ],
+    "options": {
+        "version": {
+            "type": "string",
+            "proposals": [
+                "latest"
+            ],
+            "default": "latest",
+            "description": "Select the yamllint version you would like to install"
+        }
+    }
+}

src/yamllint/install.sh

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+#!/usr/bin/env bash
+
+UTIL_VERSION="${VERSION:-"latest"}"
+
+set -e
+
+# Clean up
+rm -rf /var/lib/apt/lists/*
+
+
+if [ "$(id -u)" -ne 0 ]; then
+    echo -e 'Script must be run as root. Use sudo, su, or add "USER root" to your Dockerfile before running this script.'
+    exit 1
+fi
+
+
+updaterc() {
+    if [ "${UPDATE_RC}" = "true" ]; then
+        echo "Updating /etc/bash.bashrc and /etc/zsh/zshrc..."
+        if [[ "$(cat /etc/bash.bashrc)" != *"$1"* ]]; then
+            echo -e "$1" >> /etc/bash.bashrc
+        fi
+        if [ -f "/etc/zsh/zshrc" ] && [[ "$(cat /etc/zsh/zshrc)" != *"$1"* ]]; then
+            echo -e "$1" >> /etc/zsh/zshrc
+        fi
+    fi
+}
+
+# settings these will allow us to clean leftovers later on
+export PYTHONUSERBASE=/tmp/pip-tmp
+export PIP_CACHE_DIR=/tmp/pip-tmp/cache
+
+
+# install python if does not exists
+if ! type pip3 > /dev/null 2>&1; then
+    echo "Installing python3..."
+    # If the python feature script had option to install pipx without the
+    # additional tools we would have used that, but since it doesnt
+    # we have to disable it with INSTALLTOOLS=false and install
+    # pipx manually later on
+
+    export VERSION="system"
+    export INSTALLTOOLS="false"
+    curl -fsSL https://raw.githubusercontent.com/devcontainers/features/main/src/python/install.sh | $SHELL
+fi
+
+# configuring install location
+# changing /usr/local/bin as we know it will be in PATH of all users
+export PIPX_BIN_DIR="/usr/local/bin"
+
+if ! type pipx > /dev/null 2>&1; then
+    echo "Installing pipx..."
+    export PIPX_HOME=/opt/pipx
+    mkdir -p ${PIPX_HOME}
+    chmod -R g+r+w "${PIPX_HOME}"
+
+    pip3 install --disable-pip-version-check --no-cache-dir --user pipx 2>&1
+    /tmp/pip-tmp/bin/pipx install --pip-args=--no-cache-dir pipx
+    PIPX_COMMAND=/tmp/pip-tmp/bin/pipx
+else
+    PIPX_COMMAND=pipx
+fi
+
+if [ "${UTIL_VERSION}" == "latest" ]; then
+	util_command="yamllint"
+else
+	util_command="yamllint==$UTIL_VERSION"
+fi
+
+echo "Installing yamllint ..."
+"${PIPX_COMMAND}" install --system-site-packages --force --pip-args '--no-cache-dir --force-reinstall' ${util_command}
+
+# cleaning after pip
+rm -rf /tmp/pip-tmp
+
+# Clean up
+rm -rf /var/lib/apt/lists/*
+
+echo "Done!"

test/yamllint/test.sh

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+#!/bin/bash
+
+set -e
+
+source dev-container-features-test-lib
+
+check "yamllint --version" yamllint --version
+
+reportResults