For some intellectual curiosity and to fix a bug, I want to create a three word alias in bash from a .sh file that then gets copied and sourced in my bashsrc.

My goal was that :

• if a user type in the terminal rails test test/ the terminal actually executes rails test
• if a user types in the terminal rails test test/controllers/file1.rb, the alias I create does not impact this and the terminal actually execute rails test test/controllers/file1.rb

It was inspired by

• multi word alias - https://unix.stackexchange.com/a/670978 (but only use 2 words alias while i need three words alias)
• declare bash function in dockerfile - https://stackoverflow.com/a/72879949

aliasRailsTest.sh

rails() {
  if [ "$1" = "test" ]  && [ "$2" = "test/" ] ; then
    shift
    rails test "$@"
  else 
    command rails "$@"
  fi
}

Dockerfile

COPY .devcontainer/aliasRailsTest.sh /home/$USERNAME/aliasRailsTest.sh
# source the make.sh script in the .bashrc
RUN echo "source /home/$USERNAME/aliasRailsTest.sh" >> "/home/$USERNAME/.bashrc"

It does not work. I tried removing the line 'shift' on the aliasRailsTest.sh file but it did not work either.

I know for sure the Dockerfile works because I checked bashsrc and my script was there, and also when I started the .sh file was only targeting 2 words alias and it used to work, so I know this part is OK. The issue very likely comes from the .sh file because I moved to 3 words alias.

Thanks for any help.

CodePudding user response：

You also need to check length of argument in your function. You can use:

rails() {
  if [[ $# = 2 && $1 = test && $2 = test/ ]]; then
    command rails "$1"
  else 
    command rails "$@"
  fi
}