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Exemplo

@babel/helper-create-regexp-features-plugin 7.29.7: transform dotAll regex flag with createRegExpFeaturePlugin

Amostra verificada para npm @babel/helper-create-regexp-features-plugin 7.29.7: transform dotAll regex flag with createRegExpFeaturePlugin. O contrato rodou…

sha256:c167622a38445d97c75724bc964e2b6882249e684a90f280c3eb319905634e34

Esta rede oferece uma coisa: uma amostra que compila. Ela a executou em um sandbox e guardou o recibo assinado. Não classifica nem garante nada — se o mesmo código compila onde você está, ela não mediu. Quantas chaves de assinatura distintas enviaram um recibo de contrato aprovado. Uma é só o autor; mais de uma significa que outra pessoa também o compilou. Uma chave é gerada por conta própria e não tem identidade registrada por trás, então conta chaves, não pessoas. MIT-0

Evidência de execução

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Base da evidência
Contrato assinado aprovado
Recibos de verificação
1
Chaves de assinatura que o compilaram
1
Ambiente declarado linux 24 · ubuntu · glibc 2.39 x64 npm

Ambientes das execuções de verificação

Ambiente Contrato Etapas Execução
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5…		 2026-08-27

Caso

HOW
Objetivo
transform dotAll regex flag with createRegExpFeaturePlugin
Pacotes
Símbolos
  • createRegExpFeaturePlugin
Criado
2026-08-27T12:38:27Z

Contrato

  1. createRegExpFeaturePlugin exports a factory function for Babel regex feature plugins
  2. createRegExpFeaturePlugin returns a plugin object with name, manipulateOptions, pre, and visitor.RegExpLiteral
  3. Plugin pre() enables the specified feature bitflag and sets the version key on file context
  4. Plugin pre() enables additional unicodeFlag bitflag when useUnicodeFlag option is explicitly false
  5. RegExpLiteral visitor compiles dotAll regex pattern to match any character and removes the s flag
  6. RegExpLiteral visitor preserves regular expressions without the s flag unchanged
  7. Module helper simulateTransformation executes full plugin lifecycle to transform dotAll regular expressions

Arquivos

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.mjs
  • test/contract.mjs

Baixar o artefato de código-fonte (tar.gz)

Código-fonte

PROMPT.md
Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: transform dotAll regex flag with createRegExpFeaturePlugin
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/helper-create-regexp-features-plugin@7.29.7
Demonstrate these symbols/APIs:
  - createRegExpFeaturePlugin

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.
csx.json
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package-lock.json
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package.json
{
  "name": "sample-babel-helper-create-regexp-features-plugin",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@babel/helper-create-regexp-features-plugin": "7.29.7"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "transform dotAll regex flag with createRegExpFeaturePlugin",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/helper-create-regexp-features-plugin@7.29.7"
  ],
  "symbols": [
    "createRegExpFeaturePlugin"
  ]
}
src/index.mjs
import helperPkg from "@babel/helper-create-regexp-features-plugin";

export const createRegExpFeaturePlugin =
  helperPkg.createRegExpFeaturePlugin ||
  helperPkg.default?.createRegExpFeaturePlugin ||
  helperPkg;

export function instantiatePlugin({
  name = "transform-dot-all-regex",
  feature = "dotAllFlag",
  options = {},
  manipulateOptions = () => {}
} = {}) {
  return createRegExpFeaturePlugin({
    name,
    feature,
    options,
    manipulateOptions
  });
}

export function createFileContext(initialEntries = {}) {
  const store = new Map(Object.entries(initialEntries));
  return {
    get(key) {
      return store.get(key);
    },
    set(key, value) {
      store.set(key, value);
    },
    has(key) {
      return store.has(key);
    },
    _store: store
  };
}

export function applyPluginPre(pluginInstance, file) {
  if (typeof pluginInstance?.pre === "function") {
    pluginInstance.pre.call({ file });
  }
}

export function transformRegExpLiteral(pluginInstance, file, path, helpers = {}) {
  if (!pluginInstance?.visitor?.RegExpLiteral) {
    throw new Error("Invalid plugin instance: missing visitor.RegExpLiteral");
  }
  const thisContext = {
    file,
    addHelper: (name) => {
      if (typeof helpers.addHelper === "function") {
        return helpers.addHelper(name);
      }
      return { type: "Identifier", name };
    }
  };
  return pluginInstance.visitor.RegExpLiteral.call(thisContext, path);
}

export function simulateTransformation({
  pattern,
  flags = "",
  feature = "dotAllFlag",
  name = "transform-dot-all-regex",
  options = {},
  manipulateOptions = () => {},
  isTest = false
} = {}) {
  const instance = instantiatePlugin({
    name,
    feature,
    options,
    manipulateOptions
  });
  const file = createFileContext();
  applyPluginPre(instance, file);

  const node = {
    type: "RegExpLiteral",
    pattern,
    flags
  };

  let replacedNode = null;
  const path = {
    node,
    parentPath: {
      isMemberExpression: ({ object, computed }) =>
        isTest && object === node && computed === false,
      get: (prop) => ({
        isIdentifier: ({ name }) => isTest && prop === "property" && name === "test"
      })
    },
    replaceWith(newNode) {
      replacedNode = newNode;
    }
  };

  transformRegExpLiteral(instance, file, path);

  return {
    instance,
    file,
    node,
    replacedNode,
    finalPattern: node.pattern,
    finalFlags: node.flags
  };
}
test/contract.mjs
import assert from "node:assert/strict";
import helperPkg from "@babel/helper-create-regexp-features-plugin";
import {
  createRegExpFeaturePlugin,
  instantiatePlugin,
  createFileContext,
  applyPluginPre,
  transformRegExpLiteral,
  simulateTransformation
} from "../src/index.mjs";

const rawFactory =
  helperPkg.createRegExpFeaturePlugin ||
  helperPkg.default?.createRegExpFeaturePlugin ||
  helperPkg;

// Contract 1: createRegExpFeaturePlugin exports a factory function for Babel regex feature plugins
{
  assert.equal(typeof createRegExpFeaturePlugin, "function");
  assert.equal(typeof rawFactory, "function");
}

// Contract 2: createRegExpFeaturePlugin returns a plugin object with name, manipulateOptions, pre, and visitor.RegExpLiteral
{
  const customManipulate = () => {};
  const plugin = instantiatePlugin({
    name: "transform-dot-all-regex",
    feature: "dotAllFlag",
    manipulateOptions: customManipulate
  });

  assert.equal(plugin.name, "transform-dot-all-regex");
  assert.equal(plugin.manipulateOptions, customManipulate);
  assert.equal(typeof plugin.pre, "function");
  assert.ok(plugin.visitor);
  assert.equal(typeof plugin.visitor.RegExpLiteral, "function");
}

// Contract 3: Plugin pre() enables the specified feature bitflag and sets the version key on file context
{
  const plugin = instantiatePlugin({
    name: "transform-dot-all-regex",
    feature: "dotAllFlag"
  });
  const file = createFileContext();
  applyPluginPre(plugin, file);

  const featuresKey = "@babel/plugin-regexp-features/featuresKey";
  const versionKey = "@babel/plugin-regexp-features/version";

  assert.ok(file.has(featuresKey));
  assert.equal(file.get(featuresKey), 2); // 1 << 1 for dotAllFlag
  assert.equal(file.get(versionKey), "7.29.7");
}

// Contract 4: Plugin pre() enables additional unicodeFlag bitflag when useUnicodeFlag option is explicitly false
{
  const plugin = instantiatePlugin({
    name: "transform-dot-all-regex",
    feature: "dotAllFlag",
    options: { useUnicodeFlag: false }
  });
  const file = createFileContext();
  applyPluginPre(plugin, file);

  const featuresKey = "@babel/plugin-regexp-features/featuresKey";
  // dotAllFlag (2) | unicodeFlag (1) = 3
  assert.equal(file.get(featuresKey), 3);
}

// Contract 5: RegExpLiteral visitor compiles dotAll regex pattern to match any character and removes the s flag
{
  const result = simulateTransformation({
    pattern: "hello.world",
    flags: "s",
    feature: "dotAllFlag"
  });

  assert.equal(result.finalPattern, "hello[^]world");
  assert.equal(result.finalFlags, "");
  assert.equal(result.replacedNode, null);
}

// Contract 6: RegExpLiteral visitor preserves regular expressions without the s flag unchanged
{
  const result = simulateTransformation({
    pattern: "hello.world",
    flags: "g",
    feature: "dotAllFlag"
  });

  assert.equal(result.finalPattern, "hello.world");
  assert.equal(result.finalFlags, "g");
  assert.equal(result.replacedNode, null);
}

// Contract 7: Module helper simulateTransformation executes full plugin lifecycle to transform dotAll regular expressions
{
  const result = simulateTransformation({
    pattern: "^start.*end$",
    flags: "ims",
    feature: "dotAllFlag"
  });

  assert.equal(result.finalPattern, "^start[^]*end$");
  assert.equal(result.finalFlags, "im");
}

console.log("All @babel/helper-create-regexp-features-plugin contract tests passed successfully.");

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