Make update-slave-firmware.js extremely resilient (not a single failure out of 100 updates). Add shared.js

scripts/shared.js

@@ -0,0 +1,24 @@
+require('shelljs/global');
+
+function execRetry(command) {
+    let firstRun = true;
+    let remainingRetries = 3;
+    let code;
+    do {
+        if (!firstRun) {
+            console.log(`Retrying ${command}`)
+        }
+        config.fatal = !remainingRetries;
+        code = exec(command).code;
+        config.fatal = true;
+        firstRun = false;
+    } while(code && --remainingRetries);
+}
+
+const exp = {
+    execRetry
+}
+
+Object.keys(exp).forEach(function (cmd) {
+  global[cmd] = exp[cmd];
+});

scripts/update-slave-firmware.js

@@ -1,6 +1,7 @@
 #!/usr/bin/env node
 const program = require('commander');
 require('shelljs/global');
+require('./shared')
 
 config.fatal = true;
 
@@ -53,9 +54,12 @@ config.verbose = true;
 exec(`${usbDir}/send-kboot-command-to-slave.js ping 0x10`);
 exec(`${usbDir}/jump-to-slave-bootloader.js`);
 exec(`${usbDir}/reenumerate.js buspal`);
-exec(`${blhostBuspal} get-property 1`);
+execRetry(`${blhostBuspal} get-property 1`);
 exec(`${blhostBuspal} flash-erase-all-unsecure`);
 exec(`${blhostBuspal} write-memory 0x0 ${firmwareImage}`);
 exec(`${blhostUsb} reset`);
 exec(`${usbDir}/reenumerate.js normalKeyboard`);
-exec(`${usbDir}/send-kboot-command-to-slave.js reset 0x10`);
+execRetry(`${usbDir}/send-kboot-command-to-slave.js reset 0x10`);
+
+config.verbose = false;
+echo('Firmware updated successfully');