fish_shell.md

fish shell

Printing list of numbered files

printf '%03d\n' (seq 0 99)

Showing a function or alias

# Replace function_name with your function or alias
type function_name

Showing all functions

functions

adding less variable

Found the answer to this here

The only way I can see to code your specific example is :

function L; env $argv | less --chop-long-lines; end

and invoke with

L echo "hello world"

-- obviously using a function as a command, not like a zsh global alias.

Defining an Alias

1. Define alias in shell

alias rmi="rm -i"

2. Define alias in config file

alias rmi="rm -i"

3. This is equivalent to entering the following function:

function rmi
    rm -i $argv
end

4. Then, to save it across terminal sessions:

funcsave rmi

This last command creates the file ~/.config/fish/functions/rmi.fish.

Differences between bash and fish:

• setting variables
  • bash: var=value
  • fish: set var value
• function arguments
  • bash: "$@"
  • fish: $argv
• function local variables
  • bash: local var
  • fish: set -l var
• conditionals I
  • bash: [[ ... ]] and [ ... ]
  • fish: test ...
• conditionals II
  • bash: if cond; then cmds; fi
  • fish: if cond; cmds; end
• conditionals III
  • bash: cmd1 && cmd2
  • fish: cmd1; and cmd2
  • fish (as of fish 3.0): cmd1 && cmd2
• command substitution
  • bash: output=$(pipeline)
  • fish: set output (pipeline)
• process substitution
  • bash: join <(sort file1) <(sort file2)
  • fish: join (sort file1 | psub) (sort file2 | psub)