Function substituteEnvInValue

common/src/mcp/client.ts:25–34

* Substitutes environment variable references ($VAR_NAME) in a string with their values. * Supports both simple replacement ("$VAR_NAME") and interpolation ("Bearer $VAR_NAME").

(value: string)

 * Supports both simple replacement ("$VAR_NAME") and interpolation ("Bearer $VAR_NAME").
 */
function substituteEnvInValue(value: string): string {
  return value.replace(/\$([A-Z_][A-Z0-9_]*)/g, (match, varName) => {
    const envValue = process.env[varName]
    if (envValue === undefined) {
      // Return original if env var not found
      return match
    }
    return envValue
  })
}

/**
 * Substitutes environment variable references in all values of a record.