add service-startup file, which will be loaded by default

Author: zvs001

README.md

@@ -12,7 +12,7 @@ You can use it like on example below.
 App will exit if there at least on step is failed.
 Check all connections before starting server:
 
-You can create file for your services like `startServices.ts`
+You can create file for your services like `service-startup.ts`
 ```typescript
 import colors from 'colors'
 import starter from 'service-startup'

src/starter.ts

@@ -1,10 +1,18 @@
 import stepsList, { StarterStep } from './stepsList'
 import executeStep, { ExecuteStepConfig } from './executeStep'
+import resolveUtils from './utils/resolveUtils'
 
 export interface StarterConfig extends  ExecuteStepConfig {
 }
 
 async function starter(steps: StarterStep[], config?: StarterConfig) {
+  const path = resolveUtils.resolvePathFromRoot('service-startup')
+  try {
+    require(path)
+  } catch (e) {
+    // seems file is not created...
+  }
+
   const date = new Date()
   console.log(`
 ********************************************************

src/utils/resolveUtils.ts

@@ -0,0 +1,36 @@
+import path from 'path'
+
+function resolvePathFromRoot(filePath: string): string {
+  // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+  // @ts-ignore not sure issue can happen. Waiting for crash first.
+  let rootPath = process.env.PWD as string // require.main?.path
+  return path.resolve(rootPath, filePath)
+}
+
+
+function resolveMigration(fileName: string) {
+  const filePath = `./${getMigrationPath(fileName)}`
+
+  const pathAbsolute = resolvePathFromRoot(filePath)
+
+  return importFile(pathAbsolute)
+}
+
+function importFile(filePath:string) {
+  // eslint-disable-next-line
+  const fnMigration = require(filePath)
+
+  return fnMigration?.default || fnMigration
+}
+
+function requireFromRoot(filePath: string) {
+  filePath = resolvePathFromRoot(filePath)
+  return importFile(filePath)
+}
+
+export default {
+  resolvePathFromRoot,
+  resolveMigration,
+  importFile,
+  requireFromRoot,
+}