Function resolveEnvironmentVariables

apps/sim/app/api/function/execute/route.ts:539–589

(
  code: string,
  params: Record<string, any>,
  envVars: Record<string, string>,
  contextVariables: Record<string, any>
)

}

function resolveEnvironmentVariables(
  code: string,
  params: Record<string, any>,
  envVars: Record<string, string>,
  contextVariables: Record<string, any>
): string {
  let resolvedCode = code

  const regex = createEnvVarPattern()
  let match: RegExpExecArray | null
  const replacements: Array<{ match: string; index: number; varName: string; varValue: string }> =
    []

  const resolverVars: Record<string, string> = {}
  Object.entries(params).forEach(([key, value]) => {
    if (value !== undefined && value !== null) {
      resolverVars[key] = String(value)
    }
  })
  Object.entries(envVars).forEach(([key, value]) => {
    if (value !== undefined && value !== null) {
      resolverVars[key] = value
    }
  })

  while ((match = regex.exec(code)) !== null) {
    const varName = match[1].trim()

    if (!(varName in resolverVars)) {
      continue
    }

    replacements.push({
      match: match[0],
      index: match.index,
      varName,
      varValue: resolverVars[varName],
    })
  }

  for (let i = replacements.length - 1; i >= 0; i--) {
    const { match: matchStr, index, varName, varValue } = replacements[i]

    const safeVarName = `__var_${varName.replace(/[^a-zA-Z0-9_]/g, '_')}`
    contextVariables[safeVarName] = varValue
    resolvedCode =
      resolvedCode.slice(0, index) + safeVarName + resolvedCode.slice(index + matchStr.length)
  }

  return resolvedCode
}

function resolveTagVariables(
  code: string,