Initial commit

node_modules/with/lib/globals.js

@@ -0,0 +1,190 @@
+"use strict";
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+}));
+var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
+    Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+    o["default"] = v;
+});
+var __importStar = (this && this.__importStar) || function (mod) {
+    if (mod && mod.__esModule) return mod;
+    var result = {};
+    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
+    __setModuleDefault(result, mod);
+    return result;
+};
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+const assert_never_1 = __importDefault(require("assert-never"));
+const babel_walk_1 = require("babel-walk");
+const t = __importStar(require("@babel/types"));
+const reference_1 = __importDefault(require("./reference"));
+const isScope = (node) => t.isFunctionParent(node) || t.isProgram(node);
+const isBlockScope = (node) => t.isBlockStatement(node) || isScope(node);
+const declaresArguments = (node) => t.isFunction(node) && !t.isArrowFunctionExpression(node);
+const declaresThis = declaresArguments;
+const LOCALS_SYMBOL = Symbol('locals');
+const getLocals = (node) => node[LOCALS_SYMBOL];
+const declareLocals = (node) => (node[LOCALS_SYMBOL] = node[LOCALS_SYMBOL] || new Set());
+const setLocal = (node, name) => declareLocals(node).add(name);
+// First pass
+function declareFunction(node) {
+    for (const param of node.params) {
+        declarePattern(param, node);
+    }
+    const id = node.id;
+    if (id) {
+        setLocal(node, id.name);
+    }
+}
+function declarePattern(node, parent) {
+    switch (node.type) {
+        case 'Identifier':
+            setLocal(parent, node.name);
+            break;
+        case 'ObjectPattern':
+            for (const prop of node.properties) {
+                switch (prop.type) {
+                    case 'RestElement':
+                        declarePattern(prop.argument, parent);
+                        break;
+                    case 'ObjectProperty':
+                        declarePattern(prop.value, parent);
+                        break;
+                    default:
+                        assert_never_1.default(prop);
+                        break;
+                }
+            }
+            break;
+        case 'ArrayPattern':
+            for (const element of node.elements) {
+                if (element)
+                    declarePattern(element, parent);
+            }
+            break;
+        case 'RestElement':
+            declarePattern(node.argument, parent);
+            break;
+        case 'AssignmentPattern':
+            declarePattern(node.left, parent);
+            break;
+        // istanbul ignore next
+        default:
+            throw new Error('Unrecognized pattern type: ' + node.type);
+    }
+}
+function declareModuleSpecifier(node, _state, parents) {
+    for (let i = parents.length - 2; i >= 0; i--) {
+        if (isScope(parents[i])) {
+            setLocal(parents[i], node.local.name);
+            return;
+        }
+    }
+}
+const firstPass = babel_walk_1.ancestor({
+    VariableDeclaration(node, _state, parents) {
+        for (let i = parents.length - 2; i >= 0; i--) {
+            if (node.kind === 'var'
+                ? t.isFunctionParent(parents[i])
+                : isBlockScope(parents[i])) {
+                for (const declaration of node.declarations) {
+                    declarePattern(declaration.id, parents[i]);
+                }
+                return;
+            }
+        }
+    },
+    FunctionDeclaration(node, _state, parents) {
+        if (node.id) {
+            for (let i = parents.length - 2; i >= 0; i--) {
+                if (isScope(parents[i])) {
+                    setLocal(parents[i], node.id.name);
+                    return;
+                }
+            }
+        }
+    },
+    Function: declareFunction,
+    ClassDeclaration(node, _state, parents) {
+        for (let i = parents.length - 2; i >= 0; i--) {
+            if (isScope(parents[i])) {
+                setLocal(parents[i], node.id.name);
+                return;
+            }
+        }
+    },
+    TryStatement(node) {
+        if (node.handler === null)
+            return;
+        if (node.handler.param === null)
+            return;
+        declarePattern(node.handler.param, node.handler);
+    },
+    ImportDefaultSpecifier: declareModuleSpecifier,
+    ImportSpecifier: declareModuleSpecifier,
+    ImportNamespaceSpecifier: declareModuleSpecifier,
+});
+// Second pass
+const secondPass = babel_walk_1.ancestor({
+    Identifier(node, state, parents) {
+        var _a;
+        const name = node.name;
+        if (name === 'undefined')
+            return;
+        const lastParent = parents[parents.length - 2];
+        if (lastParent) {
+            if (!reference_1.default(node, lastParent))
+                return;
+            for (const parent of parents) {
+                if (name === 'arguments' && declaresArguments(parent)) {
+                    return;
+                }
+                if ((_a = getLocals(parent)) === null || _a === void 0 ? void 0 : _a.has(name)) {
+                    return;
+                }
+            }
+        }
+        state.globals.push(node);
+    },
+    ThisExpression(node, state, parents) {
+        for (const parent of parents) {
+            if (declaresThis(parent)) {
+                return;
+            }
+        }
+        state.globals.push(node);
+    },
+});
+function findGlobals(ast) {
+    const globals = [];
+    // istanbul ignore if
+    if (!t.isNode(ast)) {
+        throw new TypeError('Source must be a Babylon AST');
+    }
+    firstPass(ast, undefined);
+    secondPass(ast, { globals });
+    const groupedGlobals = new Map();
+    for (const node of globals) {
+        const name = node.type === 'ThisExpression' ? 'this' : node.name;
+        const existing = groupedGlobals.get(name);
+        if (existing) {
+            existing.push(node);
+        }
+        else {
+            groupedGlobals.set(name, [node]);
+        }
+    }
+    return [...groupedGlobals]
+        .map(([name, nodes]) => ({ name, nodes }))
+        .sort((a, b) => (a.name < b.name ? -1 : 1));
+}
+exports.default = findGlobals;
+//# sourceMappingURL=globals.js.map