[enh] Make `sync` a module

app/cli.js

@@ -183,31 +183,6 @@ module.exports = () => {
           })(step, null);
         }));
 
-      program
-        .command('sync [host] [port] [to]')
-        .description('Synchronize blockchain from a remote Duniter node')
-        .action(subCommand(service(function (host, port, to, server, conf) {
-          if (!host) {
-            throw 'Host is required.';
-          }
-          if (!port) {
-            throw 'Port is required.';
-          }
-          return co(function *() {
-            let cautious;
-            if (program.nocautious) {
-              cautious = false;
-            }
-            if (program.cautious) {
-              cautious = true;
-            }
-            yield server.synchronize(host, port, parseInt(to), 0, !program.nointeractive, cautious, program.nopeers, program.noshuffle);
-            if (server) {
-              yield server.disconnect();
-            }
-          });
-        })));
-
       program
         .command('peer [host] [port]')
         .description('Exchange peerings with another node')

index.js

@@ -23,9 +23,43 @@ const configDependency = {
   }
 };
 
+const syncDependency = {
+  duniter: {
+    cli: [{
+      name: 'sync [host] [port] [to]',
+      desc: 'Synchronize blockchain from a remote Duniter node',
+      onPluggedDALExecute: (server, conf, program, params, startServices, stopServices) => co(function*() {
+        const host = params[0];
+        const port = params[1];
+        const to   = params[2];
+        if (!host) {
+          throw 'Host is required.';
+        }
+        if (!port) {
+          throw 'Port is required.';
+        }
+        let cautious;
+        if (program.nocautious) {
+          cautious = false;
+        }
+        if (program.cautious) {
+          cautious = true;
+        }
+        yield server.synchronize(host, port, parseInt(to), 0, !program.nointeractive, cautious, program.nopeers, program.noshuffle);
+        if (server) {
+          yield server.disconnect();
+        }
+      })
+    }]
+  }
+};
+
 const DEFAULT_DEPENDENCIES = [{
   name: 'duniter-config',
   required: configDependency
+}, {
+  name: 'duniter-sync',
+  required: syncDependency
 }];
 
 module.exports = function (home, memory, overConf) {