feat(dockest): support function as commands for injecting the contain…

…erId into the command. (#133)

* feat(dockest): support function as commands for injecting the containerId into the command.

This makes it much easier to run commands inside your container, e.g. a database dump import.

* test: add example for using a command with the injected container id.

packages/dockest/src/@types.ts

@@ -63,7 +63,7 @@ export interface DockerComposeFileServicePostgres extends DockerComposeFileServi
   }
 }
 
-export type Commands = string[]
+export type Commands = (string | ((containerId: string) => string))[]
 
 export interface DockestService {
   serviceName: ServiceName

packages/dockest/src/run/waitForServices/runRunnerCommands.ts

@@ -4,7 +4,10 @@ import { Runner } from '../../@types'
 const logPrefix = '[Dockest Service Commands]'
 
 export const runRunnerCommands = async ({ runner, runner: { commands } }: { runner: Runner }) => {
-  for (const command of commands) {
+  for (let command of commands) {
+    if (typeof command === 'function') {
+      command = command(runner.containerId)
+    }
     await execaWrapper(command, { runner, logPrefix, logStdout: true })
   }
 }

packages/examples/multiple-resources/dockest.ts

@@ -18,6 +18,7 @@ dockest.run([
       'sequelize db:migrate',
       'sequelize db:seed:undo:all',
       'sequelize db:seed --seed 20190101001337-demo-user',
+      containerId => `echo "The container id is ${containerId}"`,
     ],
     healthcheck: ({ defaultHealthchecks: { postgres } }) => postgres(),
   },