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46 lines
1.3 KiB
46 lines
1.3 KiB
'use strict' |
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var dotenvExpand = function (config) { |
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// if ignoring process.env, use a blank object |
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var environment = config.ignoreProcessEnv ? {} : process.env |
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var interpolate = function (envValue) { |
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var matches = envValue.match(/(.?\${?(?:[a-zA-Z0-9_]+)?}?)/g) || [] |
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return matches.reduce(function (newEnv, match) { |
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var parts = /(.?)\${?([a-zA-Z0-9_]+)?}?/g.exec(match) |
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var prefix = parts[1] |
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var value, replacePart |
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if (prefix === '\\') { |
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replacePart = parts[0] |
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value = replacePart.replace('\\$', '$') |
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} else { |
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var key = parts[2] |
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replacePart = parts[0].substring(prefix.length) |
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// process.env value 'wins' over .env file's value |
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value = environment.hasOwnProperty(key) ? environment[key] : (config.parsed[key] || '') |
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// Resolve recursive interpolations |
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value = interpolate(value) |
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} |
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return newEnv.replace(replacePart, value) |
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}, envValue) |
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} |
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for (var configKey in config.parsed) { |
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var value = environment.hasOwnProperty(configKey) ? environment[configKey] : config.parsed[configKey] |
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config.parsed[configKey] = interpolate(value) |
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} |
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for (var processKey in config.parsed) { |
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environment[processKey] = config.parsed[processKey] |
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} |
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return config |
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} |
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module.exports = dotenvExpand
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