How to port `ranger-cd` function to fish shell - fish

Question

I have been trying to port the ranger-cd function for the ranger file manager to the fish shell. As of 2013, ranger’s ranger-cd function looks like this:
function ranger-cd {
tempfile='/tmp/chosendir'
/usr/bin/ranger --choosedir="$tempfile" "${#:-$(pwd)}"
test -f "$tempfile" &&
if [ "$(cat -- "$tempfile")" != "$(echo -n `pwd`)" ]; then
cd -- "$(cat "$tempfile")"
fi
rm -f -- "$tempfile"
}
# This binds Ctrl-O to ranger-cd:
bind '"\C-o":"ranger-cd\C-m"'
(This function gives a temporary file to ranger file manager to store the last accessed directory so that we can change to that directory after ranger quits.)
Here’s what I have done so far to port the function to fish:
function ranger-cd
set tempfile '/tmp/chosendir'
/usr/bin/ranger --choosedir=$tempfile (pwd)
test -f $tempfile and
if cat $tempfile != echo -n (pwd)
cd (cat $tempfile)
end
rm -f $tempfile
end
function fish_user_key_bindings
bind \co ranger-cd
end
When I use this function I get:
test: unexpected argument at index 2: 'and'
1 /home/gokcecat: !=: No such file or directory
cat: echo: No such file or directory
cat: /home/gokce: Is a directory
I’m guessing there are still multiple errors in the above code. Does anyone have a working solution for this?

Answer 1

My answer is based off of gzfrancisco's. However, I fix the "'-a' at index 2" issue, and I also ensure that a new prompt is printed after exiting ranger.
I put the following in ~/.config/fish/config.fish:
function ranger-cd
set tempfile '/tmp/chosendir'
ranger --choosedir=$tempfile (pwd)
if test -f $tempfile
if [ (cat $tempfile) != (pwd) ]
cd (cat $tempfile)
end
end
rm -f $tempfile
end
function fish_user_key_bindings
bind \co 'ranger-cd ; commandline -f repaint'
end

Answer 2

simpler solution, but it does the same. type in shell:
alias ranger 'ranger --choosedir=$HOME/.rangerdir; set RANGERDIR (cat $HOME/.rangerdir); cd $RANGERDIR'
funcsave ranger
alias is a shortcut do define a function. funcsave saves it into ~/.config/fish/functions/ranger.fish

Answer 3

The problem is this line.
test -f $tempfile and
You shuld remove the and because "and" is a conditional execution
http://ridiculousfish.com/shell/user_doc/html/commands.html#and
function ranger-cd
set tempfile '/tmp/chosendir'
/usr/bin/ranger --choosedir=$tempfile (pwd)
if test -f $tempfile and cat $tempfile != echo -n (pwd)
cd (cat $tempfile)
end
rm -f $tempfile
end

Answer 4

EDIT: This does not work for fish unfortunately, but only for bash-compatible shells.
I recently found out that there is another way to accomplish the same end goal, by sourcing the ranger script instead:
source ranger
When ranger is then exited, it will have changed the working directory into the last visited one.