How to require confirmation for git reset --hard?

Question

How to I make sure that git asks for confirmation on any hard reset?

I have had this several times. The terminal bugged out(bash history navigation) and showed me only the last part of the command... I pressed enter and to my surprise reset all my changes.

So is there a way to make sure that under normal operation git asks for a confirmation when performing a hard reset?

Answer 1

Git itself doesn't implement this (for good!), and it's impossible to alias a built-in Git command, so I see two ways:

• A custom wrapper — something like

   # cat >/usr/local/bin/mygit
   #!/bin/sh
   set -e -u
   if [ $# -ge 2 ]; then
       if [ "x$1" = "xreset" -a "x$2" = "x--hard" ]; then
           echo 'Sure?'
           read resp || exit $?
           test "x$resp" = "xyes" || exit 0
       fi
   fi
   git "$@"
   ^D
   # chmod +x $_
   $ mygit reset --hard
  

• Shell aliases:

  cat >>~/.bashrc
  alias git /usr/local/bin/mygit
  ^D
  

  Where /usr/local/bin/mygit is taken from the previous point.

Update to incorporate the suggestion of William Pursell — a shell functon which "overrides" the external command:

# cat >>~/.bashrc
git() {
    set -e -u
    if [ $# -ge 2 ]; then
        if [ "x$1" = "xreset" -a "x$2" = "x--hard" ]; then
            echo 'Sure?'
            read resp || return $?
            test "x$resp" = "xyes" || return 0
        fi
    fi
    command git "$@"
}
^D

After that, plain git blah ... in a shell would call the wrapper function while direct /usr/bin/git would call Git directly.