git clone - fail instead of prompting for credentials

Solution 1:

In git version 2.3 there's an environment variable GIT_TERMINAL_PROMPT which when set to 0 will disable prompting for credentials.

You can get more info about it in man git (after updating to git version 2.3) or in this blog post on github.

Examples:

git clone https://github.com/some/non-existing-repo will prompt for username & password
GIT_TERMINAL_PROMPT=0 git clone https://github.com/some/non-existing-repo will fail without prompting for username & password

If you are using ssh authentication, and on linux, then you can create an ssh command replacement to disable this.

Create a file called "sshnoprompt.sh" with:

ssh -oBatchMode=yes $@

Make this file executable with chmod +x sshnoprompt.sh

Then when starting git:

GIT_SSH="sshnoprompt.sh" git clone foo@dummyserver:not_a_repo

And it will not allow any interactive git prompts or questions - it shouldn't be able to ask the user for anything.