trace2: pass to GPG

Pass instance of Trace2 to Gpg in preparation for capturing exceptions,
which will be added in a future commit.

Author: ldennington

src/shared/Core/CredentialStore.cs

@@ -79,7 +79,7 @@ private void EnsureBackingStore()
 
                 case StoreNames.Gpg:
                     ValidateGpgPass(out string gpgStoreRoot, out string gpgExec);
-                    IGpg gpg = new Gpg(gpgExec, _context.SessionManager, _context.ProcessManager);
+                    IGpg gpg = new Gpg(gpgExec, _context.SessionManager, _context.ProcessManager, _context.Trace2);
                     _backingStore = new GpgPassCredentialStore(_context.FileSystem, gpg, gpgStoreRoot, ns);
                     break;
 

src/shared/Core/Gpg.cs

@@ -15,15 +15,18 @@ public class Gpg : IGpg
         private readonly string _gpgPath;
         private readonly ISessionManager _sessionManager;
         private readonly IProcessManager _processManager;
+        private readonly ITrace2 _trace2;
 
-        public Gpg(string gpgPath, ISessionManager sessionManager, IProcessManager processManager)
+        public Gpg(string gpgPath, ISessionManager sessionManager, IProcessManager processManager, ITrace2 trace2)
         {
             EnsureArgument.NotNullOrWhiteSpace(gpgPath, nameof(gpgPath));
             EnsureArgument.NotNull(sessionManager, nameof(sessionManager));
+            EnsureArgument.NotNull(trace2, nameof(trace2));
 
             _gpgPath = gpgPath;
             _sessionManager = sessionManager;
             _processManager = processManager;
+            _trace2 = trace2;
         }
 
         public string DecryptFile(string path)