source: trip-planner-front/node_modules/resolve/lib/sync.js@ 8d391a1

Last change on this file since 8d391a1 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 6.5 KB
Line 
1var isCore = require('is-core-module');
2var fs = require('fs');
3var path = require('path');
4var caller = require('./caller');
5var nodeModulesPaths = require('./node-modules-paths');
6var normalizeOptions = require('./normalize-options');
7
8var realpathFS = fs.realpathSync && typeof fs.realpathSync.native === 'function' ? fs.realpathSync.native : fs.realpathSync;
9
10var defaultIsFile = function isFile(file) {
11 try {
12 var stat = fs.statSync(file);
13 } catch (e) {
14 if (e && (e.code === 'ENOENT' || e.code === 'ENOTDIR')) return false;
15 throw e;
16 }
17 return stat.isFile() || stat.isFIFO();
18};
19
20var defaultIsDir = function isDirectory(dir) {
21 try {
22 var stat = fs.statSync(dir);
23 } catch (e) {
24 if (e && (e.code === 'ENOENT' || e.code === 'ENOTDIR')) return false;
25 throw e;
26 }
27 return stat.isDirectory();
28};
29
30var defaultRealpathSync = function realpathSync(x) {
31 try {
32 return realpathFS(x);
33 } catch (realpathErr) {
34 if (realpathErr.code !== 'ENOENT') {
35 throw realpathErr;
36 }
37 }
38 return x;
39};
40
41var maybeRealpathSync = function maybeRealpathSync(realpathSync, x, opts) {
42 if (opts && opts.preserveSymlinks === false) {
43 return realpathSync(x);
44 }
45 return x;
46};
47
48var defaultReadPackageSync = function defaultReadPackageSync(readFileSync, pkgfile) {
49 var body = readFileSync(pkgfile);
50 try {
51 var pkg = JSON.parse(body);
52 return pkg;
53 } catch (jsonErr) {}
54};
55
56var getPackageCandidates = function getPackageCandidates(x, start, opts) {
57 var dirs = nodeModulesPaths(start, opts, x);
58 for (var i = 0; i < dirs.length; i++) {
59 dirs[i] = path.join(dirs[i], x);
60 }
61 return dirs;
62};
63
64module.exports = function resolveSync(x, options) {
65 if (typeof x !== 'string') {
66 throw new TypeError('Path must be a string.');
67 }
68 var opts = normalizeOptions(x, options);
69
70 var isFile = opts.isFile || defaultIsFile;
71 var readFileSync = opts.readFileSync || fs.readFileSync;
72 var isDirectory = opts.isDirectory || defaultIsDir;
73 var realpathSync = opts.realpathSync || defaultRealpathSync;
74 var readPackageSync = opts.readPackageSync || defaultReadPackageSync;
75 if (opts.readFileSync && opts.readPackageSync) {
76 throw new TypeError('`readFileSync` and `readPackageSync` are mutually exclusive.');
77 }
78 var packageIterator = opts.packageIterator;
79
80 var extensions = opts.extensions || ['.js'];
81 var includeCoreModules = opts.includeCoreModules !== false;
82 var basedir = opts.basedir || path.dirname(caller());
83 var parent = opts.filename || basedir;
84
85 opts.paths = opts.paths || [];
86
87 // ensure that `basedir` is an absolute path at this point, resolving against the process' current working directory
88 var absoluteStart = maybeRealpathSync(realpathSync, path.resolve(basedir), opts);
89
90 if ((/^(?:\.\.?(?:\/|$)|\/|([A-Za-z]:)?[/\\])/).test(x)) {
91 var res = path.resolve(absoluteStart, x);
92 if (x === '.' || x === '..' || x.slice(-1) === '/') res += '/';
93 var m = loadAsFileSync(res) || loadAsDirectorySync(res);
94 if (m) return maybeRealpathSync(realpathSync, m, opts);
95 } else if (includeCoreModules && isCore(x)) {
96 return x;
97 } else {
98 var n = loadNodeModulesSync(x, absoluteStart);
99 if (n) return maybeRealpathSync(realpathSync, n, opts);
100 }
101
102 var err = new Error("Cannot find module '" + x + "' from '" + parent + "'");
103 err.code = 'MODULE_NOT_FOUND';
104 throw err;
105
106 function loadAsFileSync(x) {
107 var pkg = loadpkg(path.dirname(x));
108
109 if (pkg && pkg.dir && pkg.pkg && opts.pathFilter) {
110 var rfile = path.relative(pkg.dir, x);
111 var r = opts.pathFilter(pkg.pkg, x, rfile);
112 if (r) {
113 x = path.resolve(pkg.dir, r); // eslint-disable-line no-param-reassign
114 }
115 }
116
117 if (isFile(x)) {
118 return x;
119 }
120
121 for (var i = 0; i < extensions.length; i++) {
122 var file = x + extensions[i];
123 if (isFile(file)) {
124 return file;
125 }
126 }
127 }
128
129 function loadpkg(dir) {
130 if (dir === '' || dir === '/') return;
131 if (process.platform === 'win32' && (/^\w:[/\\]*$/).test(dir)) {
132 return;
133 }
134 if ((/[/\\]node_modules[/\\]*$/).test(dir)) return;
135
136 var pkgfile = path.join(maybeRealpathSync(realpathSync, dir, opts), 'package.json');
137
138 if (!isFile(pkgfile)) {
139 return loadpkg(path.dirname(dir));
140 }
141
142 var pkg = readPackageSync(readFileSync, pkgfile);
143
144 if (pkg && opts.packageFilter) {
145 // v2 will pass pkgfile
146 pkg = opts.packageFilter(pkg, /*pkgfile,*/ dir); // eslint-disable-line spaced-comment
147 }
148
149 return { pkg: pkg, dir: dir };
150 }
151
152 function loadAsDirectorySync(x) {
153 var pkgfile = path.join(maybeRealpathSync(realpathSync, x, opts), '/package.json');
154 if (isFile(pkgfile)) {
155 try {
156 var pkg = readPackageSync(readFileSync, pkgfile);
157 } catch (e) {}
158
159 if (pkg && opts.packageFilter) {
160 // v2 will pass pkgfile
161 pkg = opts.packageFilter(pkg, /*pkgfile,*/ x); // eslint-disable-line spaced-comment
162 }
163
164 if (pkg && pkg.main) {
165 if (typeof pkg.main !== 'string') {
166 var mainError = new TypeError('package “' + pkg.name + '” `main` must be a string');
167 mainError.code = 'INVALID_PACKAGE_MAIN';
168 throw mainError;
169 }
170 if (pkg.main === '.' || pkg.main === './') {
171 pkg.main = 'index';
172 }
173 try {
174 var m = loadAsFileSync(path.resolve(x, pkg.main));
175 if (m) return m;
176 var n = loadAsDirectorySync(path.resolve(x, pkg.main));
177 if (n) return n;
178 } catch (e) {}
179 }
180 }
181
182 return loadAsFileSync(path.join(x, '/index'));
183 }
184
185 function loadNodeModulesSync(x, start) {
186 var thunk = function () { return getPackageCandidates(x, start, opts); };
187 var dirs = packageIterator ? packageIterator(x, start, thunk, opts) : thunk();
188
189 for (var i = 0; i < dirs.length; i++) {
190 var dir = dirs[i];
191 if (isDirectory(path.dirname(dir))) {
192 var m = loadAsFileSync(dir);
193 if (m) return m;
194 var n = loadAsDirectorySync(dir);
195 if (n) return n;
196 }
197 }
198 }
199};
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