-
Notifications
You must be signed in to change notification settings - Fork 99
/
tsconfig-loader.ts
176 lines (154 loc) · 4.75 KB
/
tsconfig-loader.ts
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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
import * as path from "path";
import * as fs from "fs";
// eslint-disable-next-line @typescript-eslint/no-require-imports
import JSON5 = require("json5");
// eslint-disable-next-line @typescript-eslint/no-require-imports
import StripBom = require("strip-bom");
/**
* Typing for the parts of tsconfig that we care about
*/
export interface Tsconfig {
extends?: string;
compilerOptions?: {
baseUrl?: string;
paths?: { [key: string]: Array<string> };
strict?: boolean;
};
}
export interface TsConfigLoaderResult {
tsConfigPath: string | undefined;
baseUrl: string | undefined;
paths: { [key: string]: Array<string> } | undefined;
}
export interface TsConfigLoaderParams {
getEnv: (key: string) => string | undefined;
cwd: string;
loadSync?(
cwd: string,
filename?: string,
baseUrl?: string
): TsConfigLoaderResult;
}
export function tsConfigLoader({
getEnv,
cwd,
loadSync = loadSyncDefault,
}: TsConfigLoaderParams): TsConfigLoaderResult {
const TS_NODE_PROJECT = getEnv("TS_NODE_PROJECT");
const TS_NODE_BASEURL = getEnv("TS_NODE_BASEURL");
// tsconfig.loadSync handles if TS_NODE_PROJECT is a file or directory
// and also overrides baseURL if TS_NODE_BASEURL is available.
const loadResult = loadSync(cwd, TS_NODE_PROJECT, TS_NODE_BASEURL);
return loadResult;
}
function loadSyncDefault(
cwd: string,
filename?: string,
baseUrl?: string
): TsConfigLoaderResult {
// Tsconfig.loadSync uses path.resolve. This is why we can use an absolute path as filename
const configPath = resolveConfigPath(cwd, filename);
if (!configPath) {
return {
tsConfigPath: undefined,
baseUrl: undefined,
paths: undefined,
};
}
const config = loadTsconfig(configPath);
return {
tsConfigPath: configPath,
baseUrl:
baseUrl ||
(config && config.compilerOptions && config.compilerOptions.baseUrl),
paths: config && config.compilerOptions && config.compilerOptions.paths,
};
}
function resolveConfigPath(cwd: string, filename?: string): string | undefined {
if (filename) {
const absolutePath = fs.lstatSync(filename).isDirectory()
? path.resolve(filename, "./tsconfig.json")
: path.resolve(cwd, filename);
return absolutePath;
}
if (fs.statSync(cwd).isFile()) {
return path.resolve(cwd);
}
const configAbsolutePath = walkForTsConfig(cwd);
return configAbsolutePath ? path.resolve(configAbsolutePath) : undefined;
}
export function walkForTsConfig(
directory: string,
readdirSync: (path: string) => string[] = fs.readdirSync
): string | undefined {
console.log("directory", directory);
const files = readdirSync(directory);
const filesToCheck = ["tsconfig.json", "jsconfig.json"];
for (const fileToCheck of filesToCheck) {
if (files.indexOf(fileToCheck) !== -1) {
return path.join(directory, fileToCheck);
}
}
const parentDirectory = path.dirname(directory);
// If we reached the top
if (directory === parentDirectory) {
return undefined;
}
return walkForTsConfig(parentDirectory, readdirSync);
}
export function loadTsconfig(
configFilePath: string,
// eslint-disable-next-line no-shadow
existsSync: (path: string) => boolean = fs.existsSync,
readFileSync: (filename: string) => string = (filename: string) =>
fs.readFileSync(filename, "utf8")
): Tsconfig | undefined {
if (!existsSync(configFilePath)) {
return undefined;
}
const configString = readFileSync(configFilePath);
const cleanedJson = StripBom(configString);
const config: Tsconfig = JSON5.parse(cleanedJson);
let extendedConfig = config.extends;
if (extendedConfig) {
if (
typeof extendedConfig === "string" &&
extendedConfig.indexOf(".json") === -1
) {
extendedConfig += ".json";
}
const currentDir = path.dirname(configFilePath);
let extendedConfigPath = path.join(currentDir, extendedConfig);
if (
extendedConfig.indexOf("/") !== -1 &&
extendedConfig.indexOf(".") !== -1 &&
!existsSync(extendedConfigPath)
) {
extendedConfigPath = path.join(
currentDir,
"node_modules",
extendedConfig
);
}
const base =
loadTsconfig(extendedConfigPath, existsSync, readFileSync) || {};
// baseUrl should be interpreted as relative to the base tsconfig,
// but we need to update it so it is relative to the original tsconfig being loaded
if (base.compilerOptions && base.compilerOptions.baseUrl) {
const extendsDir = path.dirname(extendedConfig);
base.compilerOptions.baseUrl = path.join(
extendsDir,
base.compilerOptions.baseUrl
);
}
return {
...base,
...config,
compilerOptions: {
...base.compilerOptions,
...config.compilerOptions,
},
};
}
return config;
}