PullRepository(): call fetch and merge

CalculatorCInterface/git_library.cpp

@@ -1001,9 +1001,25 @@ int GitLibrary::PushRepository(char const *localRepoName, char const *branchName
     return error;
 }
 
-int GitLibrary::PullRepository(char const *localRepoName, char const *branchName,
-                               char const *userName, char const *userPassword) {
-    // "git pull" is a basiclly a "git fetch" followed by a "git merge"
+int GitLibrary::PullRepository(char const *localRepoName, char const *remoteRepoName) {
+    // "git pull" is a basically a "git fetch" followed by a "git merge"
+    git_repository *repo = nullptr;
+    int error = 0;
 
-    return 0;
+    if ((error = git_repository_open(&repo, localRepoName)) != 0) {
+    	// error
+    }
+    // remoteRepoName typically "origin"
+    if ((error = fetch(repo, remoteRepoName)) != 0) {
+	// error
+    }
+    if ((error = merge(repo) {
+        // error
+    }
+
+    if (repo) {
+	git_repository_free(repo);
+    }
+
+    return error;
 }