feat: using standalone binary

readme.md

@@ -7,7 +7,7 @@
 
 `docker-compose` is a small library that allows you to run [docker-compose](https://docs.docker.com/compose/) (which is still required) via Node.js. This is useful to bootstrap test environments.
 
-As of version 1.0, this library only supports `docker compose` (v2, the docker "compose" plugin). The `docker-compose` (v1) has been removed from recent releases of Docker Desktop and is no longer supported. Use the `0.x` versions of this library if you still need to use the old `docker-compose` (v1). 
+As of version 1.0, this library supports `docker compose` (v2, the docker "compose" plugin) by default. The `docker-compose` (v1) has been removed from recent releases of Docker Desktop and is no longer supported. However, you can still force the use of `docker-compose` by using the [standanlone mode](#standalone-mode).
 
 ## Installation
 
@@ -88,6 +88,21 @@ result.data.services.forEach((service) => {
 })
 ```
 
+### Standalone mode
+
+While the `docker-compose` executable is no longer part of a default docker installation, it is still possible to download its binary [standalone](https://docs.docker.com/compose/install/standalone/). This is useful for example when building docker images, avoiding the need to install the whole docker stack.
+
+To use a standalone binary, you can set the `executable.standalone` option to `true`. You can also set the `executablePath` option to the path of the `docker-compose` binary.
+
+```js
+compose.upAll({
+   executable: {
+      standalone: true,
+      executablePath: '/path/to/docker-compose' // optional
+   }
+})
+```
+
 ## Known issues
 
 * During testing we noticed that `docker compose` seems to send its exit code also commands don't seem to have finished. This doesn't occur for all commands, but for example with `stop` or `down`. We had the option to wait for stopped / removed containers using third party libraries but this would make bootstrapping `docker-compose` much more complicated for the users. So we decided to use a `setTimeout(500)` workaround. We're aware this is not perfect, but it seems to be the most appropriate solution for now. Details can be found in the [v2 PR discussion](https://github.com/PDMLab/docker-compose/pull/228#issuecomment-1422895821) (we're happy to get help here).

src/index.ts

@@ -2,10 +2,17 @@
 import yaml from 'yaml'
 import mapPorts from './map-ports'
 
-export interface IDockerComposeExecutableOptions {
-  executablePath: string
-  options?: string[] | (string | string[])[]
-}
+export type IDockerComposeExecutableOptions =
+  | {
+      executablePath: string
+      options?: string[] | (string | string[])[]
+      standalone?: never
+    }
+  | {
+      executablePath?: string
+      options?: never
+      standalone: true
+    }
 
 export interface IDockerComposeOptions {
   cwd?: string
@@ -268,8 +275,8 @@
  * Executes docker compose command with common options
  */
 export const execCompose = (
   command,
   args,
   options: IDockerComposeOptions = {}
 ): Promise<IDockerComposeResult> =>
   new Promise((resolve, reject): void => {
@@ -290,14 +297,22 @@
 
     const cwd = options.cwd
     const env = options.env || undefined
-    const executable = options.executable || { executablePath: 'docker' }
+    const executable = options.executable
 
-    const executableOptions = executable.options || []
-    const executableArgs = composeOptionsToArgs(executableOptions)
+    let executablePath: string
+    let executableArgs: string[] = []
+
+    if (executable?.standalone && !executable.executablePath) {
+      executablePath = 'docker-compose'
+    } else {
+      executablePath = executable?.executablePath || 'docker'
+      const executableOptions = executable?.options || []
+      executableArgs = [...composeOptionsToArgs(executableOptions), 'compose']
+    }
 
     const childProc = childProcess.spawn(
-      executable.executablePath,
-      [...executableArgs, 'compose', ...composeArgs],
+      executablePath,
+      [...executableArgs, ...composeArgs],
       {
         cwd,
         env