@decaf-ts/utils/lib/esm/utils/utils.d.ts

module management utils for decaf-ts

import { ChildProcessWithoutNullStreams, SpawnOptionsWithoutStdio } from "child_process";
import { StandardOutputWriter } from "../writers/StandardOutputWriter";
import { CommandResult } from "./types";
import { OutputWriterConstructor } from "../writers/types";
import { Logger } from "@decaf-ts/logging";
/**
 * @description Creates a locked version of a function.
 * @summary This higher-order function takes a function and returns a new function that ensures
 * sequential execution of the original function, even when called multiple times concurrently.
 * It uses a Promise-based locking mechanism to queue function calls.
 *
 * @template R - The return type of the input function.
 *
 * @param f - The function to be locked. It can take any number of parameters and return a value of type R.
 * @return A new function with the same signature as the input function, but with sequential execution guaranteed.
 *
 * @function lockify
 *
 * @mermaid
 * sequenceDiagram
 *   participant Caller
 *   participant LockedFunction
 *   participant OriginalFunction
 *   Caller->>LockedFunction: Call with params
 *   LockedFunction->>LockedFunction: Check current lock
 *   alt Lock is resolved
 *     LockedFunction->>OriginalFunction: Execute with params
 *     OriginalFunction-->>LockedFunction: Return result
 *     LockedFunction-->>Caller: Return result
 *   else Lock is pending
 *     LockedFunction->>LockedFunction: Queue execution
 *     LockedFunction-->>Caller: Return promise
 *     Note over LockedFunction: Wait for previous execution
 *     LockedFunction->>OriginalFunction: Execute with params
 *     OriginalFunction-->>LockedFunction: Return result
 *     LockedFunction-->>Caller: Resolve promise with result
 *   end
 *   LockedFunction->>LockedFunction: Update lock
 *
 * @memberOf @decaf-ts/utils
 */
export declare function lockify<R>(f: (...params: unknown[]) => R): (...params: unknown[]) => Promise<R>;
export declare function chainAbortController(controller: AbortController, ...signals: AbortSignal[]): AbortController;
export declare function chainAbortController(...signals: AbortSignal[]): AbortController;
export declare function spawnCommand<R = string>(output: StandardOutputWriter<R>, command: string, opts: SpawnOptionsWithoutStdio, abort: AbortController, logger: Logger): ChildProcessWithoutNullStreams;
/**
 * @description Executes a command asynchronously with customizable output handling.
 * @summary This function runs a shell command as a child process, providing fine-grained
 * control over its execution and output handling. It supports custom output writers,
 * allows for command abortion, and captures both stdout and stderr.
 *
 * @template R - The type of the resolved value from the command execution.
 *
 * @param command - The command to run, either as a string or an array of strings.
 * @param opts - Spawn options for the child process. Defaults to an empty object.
 * @param outputConstructor - Constructor for the output writer. Defaults to StandardOutputWriter.
 * @param args - Additional arguments to pass to the output constructor.
 * @return {CommandResult} A promise that resolves to the command result of type R.
 *
 * @function runCommand
 *
 * @mermaid
 * sequenceDiagram
 *   participant Caller
 *   participant runCommand
 *   participant OutputWriter
 *   participant ChildProcess
 *   Caller->>runCommand: Call with command and options
 *   runCommand->>OutputWriter: Create new instance
 *   runCommand->>OutputWriter: Parse command
 *   runCommand->>ChildProcess: Spawn process
 *   ChildProcess-->>runCommand: Return process object
 *   runCommand->>ChildProcess: Set up event listeners
 *   loop For each stdout data
 *     ChildProcess->>runCommand: Emit stdout data
 *     runCommand->>OutputWriter: Handle stdout data
 *   end
 *   loop For each stderr data
 *     ChildProcess->>runCommand: Emit stderr data
 *     runCommand->>OutputWriter: Handle stderr data
 *   end
 *   ChildProcess->>runCommand: Emit error (if any)
 *   runCommand->>OutputWriter: Handle error
 *   ChildProcess->>runCommand: Emit exit
 *   runCommand->>OutputWriter: Handle exit
 *   OutputWriter-->>runCommand: Resolve or reject promise
 *   runCommand-->>Caller: Return CommandResult
 *
 * @memberOf @decaf-ts/utils
 */
export declare function runCommand<R = string>(command: string, opts?: SpawnOptionsWithoutStdio, outputConstructor?: OutputWriterConstructor<R, StandardOutputWriter<R>, Error>, ...args: unknown[]): CommandResult<R>;