src/vs/base/common/envfile.ts
100 LOC · 96 covered · 4 uncovered · 4 ranges · 3 concepts · 2 introducers · 7 tests
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/*---------------------------------------------------------------------------------------------
envfile.ts ×1
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
/**
* Parses a standard .env/.envrc file into a map of the environment variables
* it defines.
*
* todo@connor4312: this can go away (if only used in Node.js targets) and be
* replaced with `util.parseEnv`. However, currently calling that makes the
* extension host crash.
*/
export function parseEnvFile(src: string) {
// Normalize line breaks
const normalizedSrc = src.replace(/\r\n?/g, '\n');
const lines = normalizedSrc.split('\n');
for (let line of lines) {
// Skip empty lines and comments
line = line.trim();
if (!line || line.startsWith('#')) {
continue;
}
// Parse the line into key and value
const [key, value] = parseLine(line);
if (key) {
result.set(key, value);
}
}
return result;
function parseLine(line: string): [string, string] | [null, null] {
// Handle export prefix
if (line.startsWith('export ')) {
line = line.substring(7).trim();
}
// Find the key-value separator
const separatorIndex = findIndexOutsideQuotes(line, c => c === '=' || c === ':');
if (separatorIndex === -1) {
return [null, null];
}
const key = line.substring(0, separatorIndex).trim();
let value = line.substring(separatorIndex + 1).trim();
// Handle comments and remove them
const commentIndex = findIndexOutsideQuotes(value, c => c === '#');
if (commentIndex !== -1) {
value = value.substring(0, commentIndex).trim();
}
// Process quoted values
if (value.length >= 2) {
const firstChar = value[0];
const lastChar = value[value.length - 1];
if ((firstChar === '"' && lastChar === '"') ||
(firstChar === '\'' && lastChar === '\'') ||
(firstChar === '`' && lastChar === '`')) {
// Remove surrounding quotes
value = value.substring(1, value.length - 1);
// Handle escaped characters in double quotes
if (firstChar === '"') {
value = value.replace(/\\n/g, '\n').replace(/\\r/g, '\r');
}
}
}
return [key, value];
}
function findIndexOutsideQuotes(text: string, predicate: (char: string) => boolean): number {
let inQuote = false;
let quoteChar = '';
for (let i = 0; i < text.length; i++) {
const char = text[i];
if (inQuote) {
if (char === quoteChar && text[i - 1] !== '\\') {
inQuote = false;
}
} else if (char === '"' || char === '\'' || char === '`') {
inQuote = true;
quoteChar = char;
} else if (predicate(char)) {
return i;
}
}
return -1;
}
}