how to detect unsuccessful git authentication in bash? - linux

Question

In my bash script ,a private repo is being cloned which prompts for username and password. The issue is even if incorrect username or password is entered and the git authentication fails - remote: Invalid username or password and the script proceeds further ignoring it .i want the git username and password read prompts to run in loop until git authentication succeeds . In other words , if incorrect username or password is entered it should be detected by bash and the read prompts should rerun in loop until git authentication is successful
#!/usr/bin/env bash
# something ....
read -e -p "Input your github username : " username
read -e -p "Input your github password : " password
git clone https://"$username":"$password"#github.com/"$username"/repo
# something ...
How do i solve this problem ?

Answer 1

Git will usually not create the directory of authentication failed. Check if the folder exists and exit if it does not:
test -d ./repo || { echo 'Dir does not exist'; exit 1; };
But before that, the git process should already exit with a non-zero exit code, so you could do this instead:
git clone "https://…#…/path/to/repo" || exit 1;
If you want to keep retrying until the command succeeds, use a loop:
read -e -p 'Input your github username: ' username
read -e -p 'Input your github password: ' password
while ! git clone "https://…#…/path/to/repo"; do
echo 'Error cloning, please retry' >&2;
read -e -p 'Input your github username: ' username
read -e -p 'Input your github password: ' password
done
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