gitk:tldr:8679f

The command gitk --since="${1 week ago}" is used to open the Git revision graph interface, gitk, and display all the commits made in the repository since a week ago.

Here's a breakdown of the command:

• gitk: This is the command to run the Git revision graph interface. It provides a visual representation of the commit history and helps inspect changes made to a repository.

• --since="${1 week ago}": This is an option used with gitk to specify the time range for the displayed commits. In this case, it is set to ${1 week ago}, which means to show the commits starting from one week ago.

The ${1 week ago} is a shell variable expansion that evaluates to the date that was one week ago from the current date. It allows the command to dynamically determine the time range instead of specifying an exact date.