14 lines
518 B
TypeScript
14 lines
518 B
TypeScript
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const VAR_PATTERN = /\$\{([A-Za-z_][A-Za-z0-9_]*)(:-([^}]*))?\}/g;
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export function interpolateEnv(
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raw: string,
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env: Record<string, string | undefined>
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): string {
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return raw.replace(VAR_PATTERN, (_match, name: string, hasDefault: string | undefined, fallback: string | undefined) => {
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const value = env[name];
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if (value !== undefined) return value;
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if (hasDefault !== undefined) return fallback ?? "";
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throw new Error(`Missing environment variable "${name}" referenced in config.yml`);
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});
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}
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