Move build-dist script to the runtime transform.

packages/babel-runtime/.npmignore

@@ -1,4 +1,3 @@
-scripts
 src
 test
 *.log

packages/babel-runtime/package.json

@@ -8,13 +8,5 @@
   "dependencies": {
     "core-js": "^2.5.7",
     "regenerator-runtime": "^0.12.0"
-  },
-  "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helpers": "7.0.0-beta.55",
-    "@babel/plugin-transform-runtime": "7.0.0-beta.55",
-    "@babel/template": "7.0.0-beta.55",
-    "@babel/preset-env": "7.0.0-beta.55",
-    "@babel/types": "7.0.0-beta.55"
   }
 }

packages/babel-runtime/scripts/build-dist.js

@@ -1,135 +0,0 @@
-"use strict";
-
-const path = require("path");
-const outputFile = require("output-file-sync");
-const helpers = require("@babel/helpers");
-const babel = require("@babel/core");
-const template = require("@babel/template");
-const t = require("@babel/types");
-
-const transformRuntime = require("@babel/plugin-transform-runtime");
-const corejs2Definitions = require("@babel/plugin-transform-runtime").definitions;
-
-const runtimeRoot = path.resolve(__dirname, "..");
-
-writeCoreJS2(runtimeRoot);
-
-writeHelpers(runtimeRoot, { esm: false, corejs2: false });
-writeHelpers(runtimeRoot, { esm: false, corejs2: true });
-writeHelpers(runtimeRoot, { esm: true, corejs2: false });
-writeHelpers(runtimeRoot, { esm: true, corejs2: true });
-
-function writeCoreJS2(pkgDirname) {
-  const paths = ["is-iterable", "get-iterator"];
-
-  Object.keys(corejs2Definitions.builtins).forEach(key => {
-    const path = corejs2Definitions.builtins[key];
-    paths.push(path);
-  });
-
-  Object.keys(corejs2Definitions.methods).forEach(key => {
-    const props = corejs2Definitions.methods[key];
-    Object.keys(props).forEach(key2 => {
-      paths.push(props[key2]);
-    });
-  });
-
-  paths.forEach(function(corePath) {
-    outputFile(
-      path.join(pkgDirname, "core-js", `${corePath}.js`),
-      `module.exports = require("core-js/library/fn/${corePath}");`
-    );
-  });
-}
-
-function writeHelpers(pkgDirname, { esm, corejs2 }) {
-  for (const helperName of helpers.list) {
-    const helperFilename = path.join(
-      pkgDirname,
-      "helpers",
-      corejs2 ? "" : "builtin",
-      esm ? "es6" : "",
-      `${helperName}.js`
-    );
-
-    outputFile(
-      helperFilename,
-      buildHelper(pkgDirname, helperFilename, helperName, { esm, corejs2 })
-    );
-  }
-}
-
-function buildHelper(pkgDirname, helperFilename, helperName, { esm, corejs2 }) {
-  const tree = t.program([], [], esm ? "module" : "script");
-  const dependencies = {};
-  let bindings = null;
-
-  if (!esm) {
-    bindings = [];
-    for (const dep of helpers.getDependencies(helperName)) {
-      const id = (dependencies[dep] = t.identifier(t.toIdentifier(dep)));
-      tree.body.push(template.statement.ast`
-        var ${id} = require("${`./${dep}`}");
-      `);
-      bindings.push(id.name);
-    }
-  }
-
-  const helper = helpers.get(
-    helperName,
-    dep => dependencies[dep],
-    esm ? null : template.expression.ast`module.exports`,
-    bindings
-  );
-  tree.body.push(...helper.nodes);
-
-  return babel.transformFromAst(tree, null, {
-    presets: [[require("@babel/preset-env"), { modules: false }]],
-    plugins: [
-      [transformRuntime, { useBuiltIns: !corejs2, useESModules: esm }],
-      buildRuntimeRewritePlugin(
-        path.relative(path.dirname(helperFilename), pkgDirname),
-        helperName
-      ),
-    ],
-  }).code;
-}
-
-function buildRuntimeRewritePlugin(relativePath, helperName) {
-  function adjustImportPath(node, relativePath) {
-    node.value =
-      helpers.list.indexOf(node.value) !== -1
-        ? `./${node.value}`
-        : node.value.replace(/^@babel\/runtime/, relativePath);
-  }
-
-  return {
-    pre(file) {
-      const original = file.get("helperGenerator");
-      file.set("helperGenerator", name => {
-        // make sure that helpers won't insert circular references to themselves
-        if (name === helperName) return false;
-
-        return original(name);
-      });
-    },
-    visitor: {
-      ImportDeclaration(path) {
-        adjustImportPath(path.get("source").node, relativePath);
-      },
-      CallExpression(path) {
-        if (
-          !path.get("callee").isIdentifier({ name: "require" }) ||
-          path.get("arguments").length !== 1 ||
-          !path.get("arguments")[0].isStringLiteral()
-        ) {
-          return;
-        }
-
-        // replace any reference to @babel/runtime and other helpers
-        // with a relative path
-        adjustImportPath(path.get("arguments")[0].node, relativePath);
-      },
-    },
-  };
-}