git-credentials-envvar

Enables git to use credentials provided by environment variables. Useful for single-use environments, e.g. containerised utilities.

Installation

Requirements

• Node.js (it is written in javascript)
• NPM (for quick installation, otherwise clone the repo, mark cli.js as executable and symlink to somewhere in your $PATH)

Install the binary:

$> npm install -g git-credential-envvar

Set GIT to use the credential helper:

$> git config --global credential.helper envvar

Usage:

The git-credentials-envar credential helper will tell GIT to use the username and password specified in the environment variables GITCREDENTIALUSERNAME and GITCREDENTIALPASSWORD.

Therefore these variables can be specfied across a whole system, or for a specific git command. See the following examples:

System wide credentials

Git will use the same credentials for every host on every git command

$> export GITCREDENTIALUSERNAME=myuser
$> export GITCREDENTIALPASSWORD=mypass
$> git clone http://mygithost.com/repo.git

Command-specific credentials

$> GITCREDENTIALUSERNAME=myuser GITCREDENTIALPASSWORD=mypass git clone http://mygithost.com/repo.git

If the credential-helper does not find these environment variables, it will print a warning message, and prompt the user for a username and password:

Could not find requried environment variable GITCREDENTIALUSERNAME and/or GITCREDENTIALPASSWORD
Username for 'https://mygithost.com': 

Testing

Once the credential-helper is installed, following the Installation instructions above, you can test the results by using the git credential fill command:

$> git credential fill
protocol=https
host=mygithost.com

Press enter to leave a blank line, the credential-helper should then output:

$> git credential fill
protocol=https
host=mygithost.com

protocol=https
host=mygithost.com
username=myuser
password=mypass