`no-observable-pipe` ESLint rule

foo.ts

const { getTypeServices } = require('eslint-etc');
const {
  ESLintUtils,
  TSESTree,
  TSESLint,
} = require('@typescript-eslint/experimental-utils');

const ruleCreator = ESLintUtils.RuleCreator(
  (_name) =>
    // This should be the URL of the docs for this rule, but since this is a custom/local rule, we
    // don't have one.
    'https://unsplash.com/',
);

const noObservablePipeMethod = ruleCreator({
  defaultOptions: [],
  meta: {
    docs: {
      description: '',
      recommended: false,
    },
    messages: {
      forbidden: '`pipe` is not allowed.',
    },
    schema: [],
    type: 'problem',
  },
  name: 'no-observable-pipe-method',
  create: (context) => {
    /** @type {TSESLint.RuleFunction<TSESTree.MemberExpression>} */
    const listener = (node) => {
      const { couldBeObservable } = getTypeServices(context);

      if (couldBeObservable(node.object)) {
        context.report({
          node,
          messageId: 'forbidden',
        });
      }
    };
    return {
      'CallExpression > MemberExpression[property.name="pipe"]': listener,
    };
  },
});