Merge branch 'issues/111'

Author: likvidator3301

Common/Helper.cs

@@ -76,6 +76,20 @@ public static string GetPackagePath(string packageName)
             return Path.Combine(GetGlobalCementDirectory(), packageName + ".cmpkg");
         }
 
+        public static string GetPackageCommitHash(string packageName)
+        {
+            var path = Path.Combine(GetGlobalCementDirectory(), packageName + ".cmpkg.hash");
+            if (!File.Exists(path))
+                return "";
+            return File.ReadAllText(path);
+        }
+
+        public static void WritePackageCommitHash(string packageName, string commitHash)
+        {
+            var path = Path.Combine(GetGlobalCementDirectory(), packageName + ".cmpkg.hash");
+            File.WriteAllText(path, commitHash);
+        }
+
         public static string GetServerRepositoriesPath()
         {
             return Path.Combine(Directory.GetDirectoryRoot(HomeDirectory()), "CementServer", "Repositories");

Common/PackageUpdater.cs

@@ -1,5 +1,6 @@
 using System;
 using System.IO;
+using System.Linq;
 using Common.Logging;
 using Microsoft.Extensions.Logging;
 
@@ -37,9 +38,13 @@ private static void UpdateFilePackage(Package package)
         private static void UpdateGitPackage(Package package)
         {
             var runner = new ShellRunner(Log);
-
             var timeout = TimeSpan.FromMinutes(1);
 
+            var remoteHash = GetRepositoryHeadHash(package);
+            var localHash = Helper.GetPackageCommitHash(package.Name);
+            if (remoteHash != null && remoteHash.Equals(localHash))
+                return;
+
             for (int i = 0; i < 3; i++)
             {
                 using (var tempDir = new TempDirectory())
@@ -66,10 +71,23 @@ private static void UpdateGitPackage(Package package)
                             Directory.CreateDirectory(Helper.GetGlobalCementDirectory());
                         File.Copy(Path.Combine(tempDir.Path, package.Name, "modules"),
                             Helper.GetPackagePath(package.Name), true);
+                        Helper.WritePackageCommitHash(package.Name, remoteHash);
                     }
                     break;
                 }
             }
         }
+
+        private static string GetRepositoryHeadHash(Package package)
+        {
+            var runner = new ShellRunner(Log);
+            var timeout = TimeSpan.FromMinutes(1);
+
+            runner.RunOnce($"git ls-remote {package.Url} HEAD", Directory.GetCurrentDirectory(), timeout);
+
+            var output = runner.Output;
+
+            return output.Split().FirstOrDefault();
+        }
     }
 }