RequireContextDependencyParserPlugin.js 2.1 KB

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  1. /*
  2. MIT License http://www.opensource.org/licenses/mit-license.php
  3. Author Tobias Koppers @sokra
  4. */
  5. "use strict";
  6. const RequireContextDependency = require("./RequireContextDependency");
  7. /** @typedef {import("../ContextModule").ContextMode} ContextMode */
  8. /** @typedef {import("../Dependency").DependencyLocation} DependencyLocation */
  9. /** @typedef {import("../javascript/JavascriptParser")} JavascriptParser */
  10. /** @typedef {import("../javascript/JavascriptParser").Range} Range */
  11. const PLUGIN_NAME = "RequireContextDependencyParserPlugin";
  12. module.exports = class RequireContextDependencyParserPlugin {
  13. /**
  14. * @param {JavascriptParser} parser the parser
  15. * @returns {void}
  16. */
  17. apply(parser) {
  18. parser.hooks.call.for("require.context").tap(PLUGIN_NAME, expr => {
  19. let regExp = /^\.\/.*$/;
  20. let recursive = true;
  21. /** @type {ContextMode} */
  22. let mode = "sync";
  23. switch (expr.arguments.length) {
  24. case 4: {
  25. const modeExpr = parser.evaluateExpression(expr.arguments[3]);
  26. if (!modeExpr.isString()) return;
  27. mode = /** @type {ContextMode} */ (modeExpr.string);
  28. }
  29. // falls through
  30. case 3: {
  31. const regExpExpr = parser.evaluateExpression(expr.arguments[2]);
  32. if (!regExpExpr.isRegExp()) return;
  33. regExp = /** @type {RegExp} */ (regExpExpr.regExp);
  34. }
  35. // falls through
  36. case 2: {
  37. const recursiveExpr = parser.evaluateExpression(expr.arguments[1]);
  38. if (!recursiveExpr.isBoolean()) return;
  39. recursive = /** @type {boolean} */ (recursiveExpr.bool);
  40. }
  41. // falls through
  42. case 1: {
  43. const requestExpr = parser.evaluateExpression(expr.arguments[0]);
  44. if (!requestExpr.isString()) return;
  45. const dep = new RequireContextDependency(
  46. {
  47. request: /** @type {string} */ (requestExpr.string),
  48. recursive,
  49. regExp,
  50. mode,
  51. category: "commonjs"
  52. },
  53. /** @type {Range} */
  54. (expr.range)
  55. );
  56. dep.loc = /** @type {DependencyLocation} */ (expr.loc);
  57. dep.optional = Boolean(parser.scope.inTry);
  58. parser.state.current.addDependency(dep);
  59. return true;
  60. }
  61. }
  62. });
  63. }
  64. };