sebmck/6to5

import semver from "semver";
import { types as t } from "@babel/core";

export function hasMinVersion(minVersion, runtimeVersion) {
  // If the range is unavailable, we're running the script during Babel's
  // build process, and we want to assume that all versions are satisfied so
  // that the built output will include all definitions.
  if (!runtimeVersion) return true;

  // semver.intersects() has some surprising behavior with comparing ranges
  // with preprelease versions. We add '^' to ensure that we are always
  // comparing ranges with ranges, which sidesteps this logic.
  // For example:
  //
  //   semver.intersects(`<7.0.1`, "7.0.0-beta.0") // false - surprising
  //   semver.intersects(`<7.0.1`, "^7.0.0-beta.0") // true - expected
  //
  // This is because the first falls back to
  //
  //   semver.satisfies("7.0.0-beta.0", `<7.0.1`) // false - surprising
  //
  // and this fails because a prerelease version can only satisfy a range
  // if it is a prerelease within the same major/minor/patch range.
  //
  // Note: If this is found to have issues, please also revisit the logic in
  // babel-core's availableHelper() API.
  if (semver.valid(runtimeVersion)) runtimeVersion = `^${runtimeVersion}`;

  return (
    !semver.intersects(`<${minVersion}`, runtimeVersion) &&
    !semver.intersects(`>=8.0.0`, runtimeVersion)
  );
}

// Note: We can't use NodePath#couldBeBaseType because it doesn't support arrays.
// Even if we added support for arrays, this package needs to be compatible with
// ^7.0.0 so we can't rely on it.
export function typeAnnotationToString(node) {
  switch (node.type) {
    case "GenericTypeAnnotation":
      if (t.isIdentifier(node.id, { name: "Array" })) return "array";
      break;
    case "StringTypeAnnotation":
      return "string";
  }
}