retry when non camera available

tools/tools-gphoto2.js

@@ -49,28 +49,34 @@ function execGphoto2 (pArgs, pMore, pCallback) {
 tools.checkVersion = function (pCb) {
   console.log('[-] Checking gphoto2 installation...'.bgBlue)
   execGphoto2('--version', function (pErr, pStdout) {
-    console.log(`OK: ${pStdout[0]}`.green)
-    pCb()
+    if (pErr) {
+      console.log(`KO`.red)
+    } else {
+      console.log(`OK: ${pStdout[0]}`.green)
+    }
+    pCb(pErr)
   })
 }
 
 tools.checkCameraConnection = function (pCb) {
   console.log('[-] Checking camera connection...'.bgBlue)
   execGphoto2('--auto-detect', function (pErr, pStdout) {
-    let device = pStdout[2]
-    if (!device) {
+    let device = pStdout && pStdout.length ? pStdout[2] : null
+    if (pErr || !device) {
       console.log(`[!] Camera not connected`.red)
       console.log('1. Connect camera via USB'.bgMagenta)
       console.log('2. Turn on the camera'.bgMagenta)
       console.log('3. Maybe - Force manual focus on camera'.bgMagenta)
-      console.log(`\n\n[-] Bobinoscope will close in 10 seconds...`)
-      setTimeout(function () {
-        process.exit(1)
-      }, 10000)
-      return
+      pCb(pErr || 'CameraNotFound')
+      // console.log(`\n\n[-] Bobinoscope will close in 10 seconds...`)
+      // setTimeout(function () {
+      //   process.exit(1)
+      // }, 10000)
+      // return
+    } else {
+      console.log(`OK: ${device}`.green)
+      pCb()
     }
-    console.log(`OK: ${device}`.green)
-    pCb()
   })
 }
 
@@ -123,7 +129,16 @@ tools.init = function (pCb) {
     // })
   })
 
-  async.waterfall(tasks, pCb)
+  async.waterfall(tasks, function (pErr) {
+    if (pErr) {
+      console.log('[!] Bobinoscope init failed... Retry in 10 seconds'.red)
+      setTimeout(function () {
+        tools.init(pCb)
+      }, 10000)
+    } else {
+      pCb()
+    }
+  })
 }
 
 module.exports = tools