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
150
151
152
153
154
155
156
157
158
159
160
161
162
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.import {  createGraph,  ModuleGraphJson,  ModuleJson,} from "https://deno.land/x/deno_graph@0.52.0/mod.ts";
/** * Checks for circular dependencies in the std submodules. * * When run with `--graph` it will output a graphviz graph in dot language. */
const root = new URL("../", import.meta.url).href;const deps: Record<string, Set<string>> = {};
function getSubmoduleName(url: string) {  return url.replace(root, "").split("/")[0];}
async function check(submod: string, paths: string[] = ["mod.ts"]) {  const deps = new Set<string>();  for (const path of paths) {    const entrypoint = new URL(`../${submod}/${path}`, import.meta.url).href;    const graph = await createGraph(entrypoint);
    for (const dep of new Set(getDeps(graph, entrypoint))) {      deps.add(dep);    }  }  deps.delete(submod);  deps.delete("types.d.ts");  return deps;}
/** Returns submodule dependencies */function getDeps(  graph: ModuleGraphJson,  specifier: string,  seen: Set<string> = new Set(),): Set<string> {  const { dependencies } = graph.modules.find((item: ModuleJson) =>    item.specifier === specifier  )!;  const deps = new Set([getSubmoduleName(specifier)]);  seen.add(specifier);  if (dependencies) {    for (const { code, type } of dependencies) {      const specifier = code?.specifier ?? type?.specifier!;      if (seen.has(specifier)) {        continue;      }      const res = getDeps(        graph,        specifier,        seen,      )!;      for (const dep of res) {        deps.add(dep);      }    }  }  return deps;}
deps["archive"] = await check("archive");deps["assert"] = await check("assert");deps["async"] = await check("async");deps["bytes"] = await check("bytes");deps["collections"] = await check("collections");deps["console"] = await check("console");deps["crypto"] = await check("crypto");deps["csv"] = await check("csv");deps["datetime"] = await check("datetime");deps["dotenv"] = await check("dotenv");deps["encoding"] = await check("encoding", [  "ascii85.ts",  "base32.ts",  "base58.ts",  "base64.ts",  "base64url.ts",  "binary.ts",  "hex.ts",  "varint.ts",]);deps["flags"] = await check("flags");deps["fmt"] = await check("fmt", [  "bytes.ts",  "colors.ts",  "duration.ts",  "printf.ts",]);deps["front_matter"] = await check("front_matter");deps["fs"] = await check("fs");deps["html"] = await check("html");deps["http"] = await check("http");deps["io"] = await check("io");deps["json"] = await check("json");deps["jsonc"] = await check("jsonc");deps["log"] = await check("log");deps["media_types"] = await check("media_types");deps["msgpack"] = await check("msgpack");deps["path"] = await check("path");deps["permissions"] = await check("permissions");deps["regexp"] = await check("regexp");deps["semver"] = await check("semver");deps["signal"] = await check("signal");deps["streams"] = await check("streams");deps["testing"] = await check("testing", [  "bdd.ts",  "mock.ts",  "snapshot.ts",  "time.ts",  "types.ts",]);deps["toml"] = await check("toml");deps["uuid"] = await check("uuid");deps["wasi"] = await check("wasi", ["snapshot_preview1.ts"]);deps["yaml"] = await check("yaml");
function checkCircularDeps(  submod: string,  ancestors: string[] = [],  seen: Set<string> = new Set(),): string[] | undefined {  const currentDeps = [...ancestors, submod];  if (ancestors.includes(submod)) {    return currentDeps;  }  const d = deps[submod];  if (!d) {    return;  }  for (const mod of d) {    const res = checkCircularDeps(mod, currentDeps, seen);    if (res) {      return res;    }  }}
if (Deno.args.includes("--graph")) {  console.log("digraph std_deps {");  for (const mod of Object.keys(deps)) {    console.log(`  ${mod};`);    for (const dep of deps[mod]) {      console.log(`  ${mod} -> ${dep};`);    }  }  console.log("}");} else {  console.log(`${Object.keys(deps).length} submodules checked.`);  for (const mod of Object.keys(deps)) {    const res = checkCircularDeps(mod);    if (res) {      console.log(`Circular dependencies found: ${res.join(" -> ")}`);      Deno.exit(1);    }  }  console.log("No circular dependencies found.");}