match-path-sync.js
4.28 KB
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
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var path = require("path");
var Filesystem = require("./filesystem");
var MappingEntry = require("./mapping-entry");
var TryPath = require("./try-path");
/**
* Creates a function that can resolve paths according to tsconfig paths property.
* @param absoluteBaseUrl Absolute version of baseUrl as specified in tsconfig.
* @param paths The paths as specified in tsconfig.
* @param mainFields A list of package.json field names to try when resolving module files.
* @param addMatchAll Add a match-all "*" rule if none is present
* @returns a function that can resolve paths.
*/
function createMatchPath(absoluteBaseUrl, paths, mainFields, addMatchAll) {
if (mainFields === void 0) { mainFields = ["main"]; }
if (addMatchAll === void 0) { addMatchAll = true; }
var absolutePaths = MappingEntry.getAbsoluteMappingEntries(absoluteBaseUrl, paths, addMatchAll);
return function (requestedModule, readJson, fileExists, extensions) {
return matchFromAbsolutePaths(absolutePaths, requestedModule, readJson, fileExists, extensions, mainFields);
};
}
exports.createMatchPath = createMatchPath;
/**
* Finds a path from tsconfig that matches a module load request.
* @param absolutePathMappings The paths to try as specified in tsconfig but resolved to absolute form.
* @param requestedModule The required module name.
* @param readJson Function that can read json from a path (useful for testing).
* @param fileExists Function that checks for existance of a file at a path (useful for testing).
* @param extensions File extensions to probe for (useful for testing).
* @param mainFields A list of package.json field names to try when resolving module files.
* @returns the found path, or undefined if no path was found.
*/
function matchFromAbsolutePaths(absolutePathMappings, requestedModule, readJson, fileExists, extensions, mainFields) {
if (readJson === void 0) { readJson = Filesystem.readJsonFromDiskSync; }
if (fileExists === void 0) { fileExists = Filesystem.fileExistsSync; }
if (extensions === void 0) { extensions = Object.keys(require.extensions); }
if (mainFields === void 0) { mainFields = ["main"]; }
var tryPaths = TryPath.getPathsToTry(extensions, absolutePathMappings, requestedModule);
if (!tryPaths) {
return undefined;
}
return findFirstExistingPath(tryPaths, readJson, fileExists, mainFields);
}
exports.matchFromAbsolutePaths = matchFromAbsolutePaths;
function findFirstExistingMainFieldMappedFile(packageJson, mainFields, packageJsonPath, fileExists) {
for (var index = 0; index < mainFields.length; index++) {
var mainFieldName = mainFields[index];
var candidateMapping = packageJson[mainFieldName];
if (candidateMapping && typeof candidateMapping === "string") {
var candidateFilePath = path.join(path.dirname(packageJsonPath), candidateMapping);
if (fileExists(candidateFilePath)) {
return candidateFilePath;
}
}
}
return undefined;
}
function findFirstExistingPath(tryPaths, readJson, fileExists, mainFields) {
if (readJson === void 0) { readJson = Filesystem.readJsonFromDiskSync; }
if (mainFields === void 0) { mainFields = ["main"]; }
for (var _i = 0, tryPaths_1 = tryPaths; _i < tryPaths_1.length; _i++) {
var tryPath = tryPaths_1[_i];
if (tryPath.type === "file" ||
tryPath.type === "extension" ||
tryPath.type === "index") {
if (fileExists(tryPath.path)) {
// Not sure why we don't just return the full path? Why strip it?
return TryPath.getStrippedPath(tryPath);
}
}
else if (tryPath.type === "package") {
var packageJson = readJson(tryPath.path);
if (packageJson) {
var mainFieldMappedFile = findFirstExistingMainFieldMappedFile(packageJson, mainFields, tryPath.path, fileExists);
if (mainFieldMappedFile) {
// Not sure why we don't just return the full path? Why strip it?
return Filesystem.removeExtension(mainFieldMappedFile);
}
}
}
else {
TryPath.exhaustiveTypeException(tryPath.type);
}
}
return undefined;
}