学习 ast-grep

• https://ast-grep.github.io
• https://github.com/ast-grep/ast-grep

demo: 替换 Promise.all inside await expression

Promise.all([
  await Promise.resolve(123),
  Promise.resolve(124),
  await Promise.resolve(125),
]);
Promise.all();

var a = {
  normalKey: prototype,
};

id: no-await-in-promise-all
language: TypeScript
rule:
  kind: await_expression
  pattern: await $B
  inside:
    pattern: Promise.all($$$)
    stopBy: end
    field: arguments
fix: $B

• CST 会显示全部的信息，比 AST 显示的数据要全面¹
• kind 代表 tree-sitter node 的名称
• inside.field 代表的是字段的类型