flow like the river

BACK_BACK/node_modules/parcel-bundler/lib/Pipeline.js

@@ -0,0 +1,214 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+
+var _asyncToGenerator2 = _interopRequireDefault(require("@babel/runtime/helpers/asyncToGenerator"));
+
+function _createForOfIteratorHelper(o, allowArrayLike) { var it; if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = o[Symbol.iterator](); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it.return != null) it.return(); } finally { if (didErr) throw err; } } }; }
+
+function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
+
+function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
+
+const Parser = require('./Parser');
+
+const path = require('path');
+
+const _require = require('@parcel/utils'),
+      errorUtils = _require.errorUtils;
+/**
+ * A Pipeline composes multiple Asset types together.
+ */
+
+
+class Pipeline {
+  constructor(options) {
+    this.options = options;
+    this.parser = new Parser(options);
+  }
+
+  process(path, isWarmUp) {
+    var _this = this;
+
+    return (0, _asyncToGenerator2.default)(function* () {
+      let options = _this.options;
+
+      if (isWarmUp) {
+        options = Object.assign({
+          isWarmUp
+        }, options);
+      }
+
+      let asset = _this.parser.getAsset(path, options);
+
+      let error = null;
+      let generatedMap = {};
+
+      try {
+        let generated = yield _this.processAsset(asset);
+
+        var _iterator = _createForOfIteratorHelper(generated),
+            _step;
+
+        try {
+          for (_iterator.s(); !(_step = _iterator.n()).done;) {
+            let rendition = _step.value;
+            generatedMap[rendition.type] = rendition.value;
+          }
+        } catch (err) {
+          _iterator.e(err);
+        } finally {
+          _iterator.f();
+        }
+      } catch (err) {
+        error = errorUtils.errorToJson(err);
+        error.fileName = path;
+      }
+
+      return {
+        id: asset.id,
+        dependencies: Array.from(asset.dependencies.values()),
+        generated: generatedMap,
+        sourceMaps: asset.sourceMaps,
+        error: error,
+        hash: asset.hash,
+        cacheData: asset.cacheData
+      };
+    })();
+  }
+
+  processAsset(asset) {
+    var _this2 = this;
+
+    return (0, _asyncToGenerator2.default)(function* () {
+      try {
+        yield asset.process();
+      } catch (err) {
+        throw asset.generateErrorMessage(err);
+      }
+
+      let inputType = path.extname(asset.name).slice(1);
+      let generated = [];
+
+      var _iterator2 = _createForOfIteratorHelper(_this2.iterateRenditions(asset)),
+          _step2;
+
+      try {
+        for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
+          let rendition = _step2.value;
+          let type = rendition.type,
+              value = rendition.value;
+
+          if (typeof value !== 'string' || rendition.final) {
+            generated.push(rendition);
+            continue;
+          } // Find an asset type for the rendition type.
+          // If the asset is not already an instance of this asset type, process it.
+
+
+          let AssetType = _this2.parser.findParser(asset.name.slice(0, -inputType.length) + type, true);
+
+          if (!(asset instanceof AssetType)) {
+            let opts = Object.assign({}, asset.options, {
+              rendition
+            });
+            let subAsset = new AssetType(asset.name, opts);
+            subAsset.id = asset.id;
+            subAsset.contents = value;
+            subAsset.dependencies = asset.dependencies;
+            subAsset.cacheData = Object.assign(asset.cacheData, subAsset.cacheData);
+            let processed = yield _this2.processAsset(subAsset);
+
+            if (rendition.meta) {
+              var _iterator4 = _createForOfIteratorHelper(processed),
+                  _step4;
+
+              try {
+                for (_iterator4.s(); !(_step4 = _iterator4.n()).done;) {
+                  let res = _step4.value;
+                  res.meta = rendition.meta;
+                  res.isMain = res.type === subAsset.type;
+                }
+              } catch (err) {
+                _iterator4.e(err);
+              } finally {
+                _iterator4.f();
+              }
+            }
+
+            generated = generated.concat(processed);
+          } else {
+            generated.push(rendition);
+          }
+        } // Post process. This allows assets a chance to modify the output produced by sub-asset types.
+
+      } catch (err) {
+        _iterator2.e(err);
+      } finally {
+        _iterator2.f();
+      }
+
+      try {
+        generated = yield asset.postProcess(generated);
+      } catch (err) {
+        throw asset.generateErrorMessage(err);
+      }
+
+      let hasMap = false;
+      let sourceMaps = {};
+
+      var _iterator3 = _createForOfIteratorHelper(generated),
+          _step3;
+
+      try {
+        for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
+          let rendition = _step3.value;
+
+          if (rendition.map && rendition.type == asset.type) {
+            sourceMaps[rendition.type] = rendition.map;
+            hasMap = true;
+          }
+        }
+      } catch (err) {
+        _iterator3.e(err);
+      } finally {
+        _iterator3.f();
+      }
+
+      if (hasMap) {
+        asset.sourceMaps = sourceMaps;
+      }
+
+      asset.generated = generated;
+      asset.hash = yield asset.generateHash();
+      return generated;
+    })();
+  }
+
+  *iterateRenditions(asset) {
+    if (Array.isArray(asset.generated)) {
+      return yield* asset.generated;
+    }
+
+    if (typeof asset.generated === 'string') {
+      return yield {
+        type: asset.type,
+        value: asset.generated
+      };
+    } // Backward compatibility support for the old API.
+    // Assume all renditions are final - don't compose asset types together.
+
+
+    for (let type in asset.generated) {
+      yield {
+        type,
+        value: asset.generated[type],
+        // for scope hoisting, we need to post process all JS
+        final: !(type === 'js' && this.options.scopeHoist)
+      };
+    }
+  }
+
+}
+
+module.exports = Pipeline;