29 lines
987 B
Plaintext
29 lines
987 B
Plaintext
const ENV_EXPR = /(?<!\\)(\\*)\$\{([^${}]+)\}/g
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export function envReplace(settingValue: string, env: NodeJS.ProcessEnv): string {
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return settingValue.replace(ENV_EXPR, replaceEnvMatch.bind(null, env))
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}
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function replaceEnvMatch (env: NodeJS.ProcessEnv, orig: string, escape: string, name: string): string {
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if (escape.length % 2) {
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return orig.slice((escape.length + 1) / 2)
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}
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const envValue = getEnvValue(env, name)
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if (envValue === undefined) {
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throw new Error(`Failed to replace env in config: ${orig}`)
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}
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return `${(escape.slice(escape.length / 2))}${envValue}`
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}
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const ENV_VALUE = /([^:-]+)(:?)-(.+)/
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function getEnvValue (env: NodeJS.ProcessEnv, name: string): string {
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const matched = name.match(ENV_VALUE)
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if (!matched) return env[name]
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const [, variableName, colon, fallback] = matched
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if (Object.prototype.hasOwnProperty.call(env, variableName)) {
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return !env[variableName] && colon ? fallback : env[variableName]
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}
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return fallback
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}
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