Introduce Remote.IsSupportedUrl.

Author: Therzok

LibGit2Sharp.Tests/RemoteFixture.cs

@@ -304,5 +304,20 @@ public void CanNotRenameWhenRemoteWithSameNameExists()
                 Assert.Throws<NameConflictException>(() => repo.Network.Remotes.Rename("origin", "upstream"));
             }
         }
+
+        [Theory]
+        [InlineData("git@github.com:org/repo.git", false)]
+        [InlineData("git://site.com:80/org/repo.git", true)]
+        [InlineData("ssh://user@host.com:80/org/repo.git", false)]
+        [InlineData("http://site.com:80/org/repo.git", true)]
+        [InlineData("https://github.com:80/org/repo.git", true)]
+        [InlineData("ftp://site.com:80/org/repo.git", false)]
+        [InlineData("ftps://site.com:80/org/repo.git", false)]
+        [InlineData("file:///path/repo.git", true)]
+        [InlineData("protocol://blah.meh/whatever.git", false)]
+        public void CanCheckIfUrlisSupported(string url, bool supported)
+        {
+            Assert.Equal(supported, Remote.IsSupportedUrl(url));
+        }
     }
 }

LibGit2Sharp/Core/NativeMethods.cs

@@ -223,6 +223,12 @@ internal delegate int git_remote_rename_problem_cb(
             [MarshalAs(UnmanagedType.CustomMarshaler, MarshalCookie = UniqueId.UniqueIdentifier, MarshalTypeRef = typeof(LaxUtf8NoCleanupMarshaler))] string problematic_refspec,
             IntPtr payload);
 
+
+        [DllImport(libgit2)]
+        [return: MarshalAs(UnmanagedType.Bool)]
+        internal static extern bool git_remote_supported_url(
+            [MarshalAs(UnmanagedType.CustomMarshaler, MarshalCookie = UniqueId.UniqueIdentifier, MarshalTypeRef = typeof(StrictUtf8Marshaler))] string url);
+
         [DllImport(libgit2)]
         internal static extern int git_branch_upstream_name(
             GitBuf buf,

LibGit2Sharp/Core/Proxy.cs

@@ -2026,6 +2026,11 @@ public static string git_remote_url(RemoteSafeHandle remote)
             return NativeMethods.git_remote_url(remote);
         }
 
+        public static bool git_remote_supported_url(string url)
+        {
+            return NativeMethods.git_remote_supported_url(url);
+        }
+
         #endregion
 
         #region git_repository_

LibGit2Sharp/Remote.cs

@@ -99,12 +99,22 @@ internal string FetchSpecTransformToSource(string reference)
         /// Determines if the proposed remote name is well-formed.
         /// </summary>
         /// <param name="name">The name to be checked.</param>
-        /// <returns>true is the name is valid; false otherwise.</returns>
+        /// <returns>true if the name is valid; false otherwise.</returns>
         public static bool IsValidName(string name)
         {
             return Proxy.git_remote_is_valid_name(name);
         }
 
+        /// <summary>
+        /// Determines if the proposed remote URL is supported by the library.
+        /// </summary>
+        /// <param name="url">The URL to be checked.</param>
+        /// <returns>true if the url is supported; false otherwise.</returns>
+        public static bool IsSupportedUrl(string url)
+        {
+            return Proxy.git_remote_supported_url(url);
+        }
+
         /// <summary>
         /// Determines whether the specified <see cref="Object"/> is equal to the current <see cref="Remote"/>.
         /// </summary>