1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
import { types as t } from '@babel/core';
import ScopeManager, { PromisedNode, resolveNode } from './scope';
type Action = (this: DepsGraph, a: t.Node, b: t.Node) => void;
function addEdge(this: DepsGraph, a: t.Node, b: t.Node) {
if (this.dependencies.has(a) && this.dependencies.get(a)!.has(b)) {
// edge has been already added∂ƒ
return;
}
this.edges.push([a, b]);
if (this.dependencies.has(a)) {
this.dependencies.get(a)!.add(b);
} else {
this.dependencies.set(a, new Set([b]));
}
if (this.dependents.has(b)) {
this.dependents.get(b)!.add(a);
} else {
this.dependents.set(b, new Set([a]));
}
}
export default class DepsGraph {
public readonly imports: Map<string, (t.Identifier | t.StringLiteral)[]> =
new Map();
public readonly importAliases: Map<t.Identifier, string> = new Map();
public readonly importTypes: Map<
string,
'wildcard' | 'default' | 'reexport'
> = new Map();
public readonly reexports: Array<t.Identifier> = [];
protected readonly parents: WeakMap<t.Node, t.Node> = new WeakMap();
protected readonly edges: Array<[t.Node, t.Node]> = [];
protected readonly exports: Map<string, t.Node> = new Map();
protected readonly dependencies: Map<t.Node, Set<t.Node>> = new Map();
protected readonly dependents: Map<t.Node, Set<t.Node>> = new Map();
private actionQueue: Array<
[Action, t.Node | PromisedNode, t.Node | PromisedNode]
> = [];
private processQueue() {
if (this.actionQueue.length === 0) {
return;
}
for (const [action, a, b] of this.actionQueue) {
const resolvedA = resolveNode(a);
const resolvedB = resolveNode(b);
if (resolvedA && resolvedB) {
action.call(this, resolvedA, resolvedB);
}
}
this.actionQueue = [];
}
private getAllReferences(id: string): (t.Identifier | t.MemberExpression)[] {
const [, name] = id.split(':');
const declaration = this.scope.getDeclaration(id)!;
const allReferences: (t.Identifier | t.MemberExpression)[] = [
...Array.from(this.dependencies.get(declaration) || []),
...Array.from(this.dependents.get(declaration) || []),
].filter((i) => t.isIdentifier(i) && i.name === name) as t.Identifier[];
allReferences.push(declaration);
return allReferences;
}
constructor(protected scope: ScopeManager) {}
addEdge(dependent: t.Node | PromisedNode, dependency: t.Node | PromisedNode) {
this.actionQueue.push([addEdge, dependent, dependency]);
}
addExport(name: string, node: t.Node) {
this.exports.set(name, node);
}
addParent(node: t.Node, parent: t.Node) {
this.parents.set(node, parent);
}
getParent(node: t.Node): t.Node | undefined {
return this.parents.get(node);
}
getDependenciesByBinding(id: string) {
this.processQueue();
const allReferences = this.getAllReferences(id);
const dependencies = [];
for (let [a, b] of this.edges) {
if (t.isIdentifier(a) && allReferences.includes(a)) {
dependencies.push(b);
}
}
return dependencies;
}
getDependentsByBinding(id: string) {
this.processQueue();
const allReferences = this.getAllReferences(id);
const dependents = [];
for (let [a, b] of this.edges) {
if (t.isIdentifier(b) && allReferences.includes(b)) {
dependents.push(a);
}
}
return dependents;
}
findDependencies(like: Object) {
this.processQueue();
return this.edges
.filter(([a]) => t.shallowEqual(a, like))
.map(([, b]) => b);
}
findDependents(like: object) {
this.processQueue();
return this.edges
.filter(([, b]) => t.shallowEqual(b, like))
.map(([a]) => a);
}
getDependencies(nodes: t.Node[]) {
this.processQueue();
return nodes.reduce(
(acc, node) => acc.concat(Array.from(this.dependencies.get(node) || [])),
[] as t.Node[]
);
}
getLeaf(name: string): t.Node | undefined {
return this.exports.get(name);
}
getLeaves(only: string[] | null): Array<t.Node | undefined> {
this.processQueue();
return only
? only.map((name) => this.getLeaf(name))
: Array.from(this.exports.values());
}
}
|
