add path constants for OS checkout, adevtool, (device) config dirs

src/config/paths.ts

@@ -0,0 +1,15 @@
+import assert from 'assert'
+import path from 'path'
+
+export const OS_CHECKOUT_DIR = getOsCheckoutDir()
+
+function getOsCheckoutDir(): string {
+  let scriptDir = '/vendor/adevtool/src/config'
+  assert(__dirname.endsWith(scriptDir))
+  return __dirname.substring(0, __dirname.length - scriptDir.length)
+}
+
+export const ADEVTOOL_DIR = path.join(OS_CHECKOUT_DIR, 'vendor/adevtool')
+
+export const CONFIG_DIR = process.env['ADEVTOOL_CONFIG_DIR'] ?? path.join(ADEVTOOL_DIR, 'config')
+export const DEVICE_CONFIG_DIR = path.join(CONFIG_DIR, 'device')