ethers.js/misc/admin/src.ts/depgraph.ts

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import { dirnames } from "./path";
import { getPackage, Package } from "./local";
class OrderedSet {
_keys: Array<string>;
_values: Record<string, boolean>
constructor() {
this._keys = [ ];
this._values = { };
}
add(key: string): void {
this._values[key] = true;
this._keys = null;
}
contains(key: string): boolean {
return !!this._values[key];
}
_sort(): void {
if (this._keys != null) { return; }
this._keys = Object.keys(this._values);
this._keys.sort();
}
get length(): number {
this._sort();
return this._keys.length;
}
get(index: number): string {
this._sort();
return this._keys[index];
}
}
export function getOrdered(skipNobuild?: boolean): Array<string> {
const packages: Record<string, Package > = { };
const filenames: Record<string, string> = { };
// Maps packages to names to list of dependencies; { [ name:string]: Array<name: string> }
const deps: Record<string, OrderedSet> = { };
let addDeps = (name: string, depends: Record<string, string>) => {
Object.keys(depends).forEach((dep) => {
// Not a package we manage
if (packages[dep] == null) { return; }
deps[name].add(dep);
});
}
for (let i = 0; i < dirnames.length; i++) {
let dirname = dirnames[i];
let info = getPackage(dirname);
if (skipNobuild && info._ethers_nobuild) { continue; }
packages[info.name] = info;
filenames[info.name] = dirname;
}
Object.keys(packages).forEach((name) => {
let info = packages[name];
deps[info.name] = new OrderedSet();
addDeps(info.name, info.dependencies || { });
addDeps(info.name, info.devDependencies || { });
});
let ordered: Array<string> = [ ];
let remaining = Object.keys(deps);
let isSatisfied = (name: string) => {
for (let i = 0; i < deps[name].length; i++) {
if (ordered.indexOf(deps[name].get(i)) === -1) { return false; }
}
return true;
}
while (remaining.length) {
let bail = true;
for (let i = 0; i < remaining.length; i++) {
if (!isSatisfied(remaining[i])) { continue; }
bail = false;
ordered.push(remaining[i]);
remaining.splice(i, 1);
break;
}
if (bail) {
throw new Error("Nothing processed; circular dependencies...");
}
}
return ordered.map((name) => filenames[name]);
}
export function sort(dirnames: Array<string>): void {
let ordered = getOrdered();
dirnames.sort((a, b) => {
let ai = ordered.indexOf(getPackage(a).name);
let bi = ordered.indexOf(getPackage(b).name);
if (ai === -1 || bi === -1) {
throw new Error("unknown dirname - " + [a, b].join(", "));
}
return ai - bi;
});
}