Program.LoadOperationArguments method is where the GCM scans, parses, and consumes environmental and configuration setting values.This is when standard input will be consumed by the GCM. In the case of “ git credential-manager get”, the Main method will call the Program.Get method, which in turn will allocate a new OperationArguments object and initialize it with the process’ standard input pipe. You’ll notice that the GCM doesn’t read from standard input immediately instead it does some setup work to determine what it expected of it and then only reads from standard input if it is expected to. To do so, place a break point in the Main method of the ‘Program.cs’ file.ĭoing so will allow you to “break in” when the execution pointer reaches your break point. Ideally, you can watch it work, so that you can learn how it works and then improve it. Once the blank line is fed to the GCM it’ll “do its thing”. Until an empty line is sent to the GCM, it’ll keep attempting to read from standard input. That empty line is how Git and the GCM notify the other side that they’re done sending data. The GCM expects Git to supply at least two pieces of information: the protocol being use and the host name for which the current operation is happening.Īn example of faking Git request for GitHub credentials: However, it is easy to play the role of Git. This is because the GCM expects to be launched by Git, not directly.

Once the GCM starts you’ll be presented with an unsatisfying console window.

Hit, or ‘Debug’ > ‘Start Debugging’ from the top menu of Visual Studio.

In the ‘Properties: Debug’ window, add the word “get” to the ‘Command line arguments:’ text box.

In the ‘Properties’ window, select the ‘Debug’ tab from the left side.

Right-click the ‘Cli-CredentialHelper’ project in Solution Explorer and select ‘Properties’.

This will download and setup all of the dependencies.

Right-click the solution node in Solution Explorer and choose ‘Restore NuGet Packages’.

Open the solution file (GitCredentialManager.sln) using Visual Studio.

View the Project on GitHub microsoft/Git-Credential-Manager-for-Windows Development and Debuggingĭeveloping for GCM and/or Askpass requires Visual Studio 2017 or newer, any version (including the free Community Edition). Secure Git credential storage for Windows with support for Visual Studio Team Services, GitHub, and Bitbucket multi-factor authentication.

Windows git credential manager