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On bash you can use set -e inside a script in order to exit on error:
set -e
cd unexisting-folder
echo "this line will not be printed"
But on fish shell set -e is used to erase variables:
set FOO bar
set -e FOO
echo {$FOO} # prints newline
What is the equivalent of Bash set -e on Fish?
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If you wish to use fish (or any other shell) as your default shell, you need to enter your new shell's executable /usr/local/bin/fish in two places: add /usr/local/bin/fish to /etc/shells. change your default shell with chsh -s to /usr/local/bin/fish.
Regular bash scripts can be used in fish shell just as scripts written in any language with proper shebang or explicitly using the interpreter (i.e. using bash script.sh ). However, many utilities, such as virtualenv, modify the shell environment and need to be sourced, and therefore cannot be used in fish.
To be able to run fish scripts from your terminal, you have to do two things. Add the following shebang line to the top of your script file: #!/usr/bin/env fish . Mark the file as executable using the following command: chmod +x <YOUR_FISH_SCRIPT_FILENAME> .
There's no equivalent of this in fish. https://github.com/fish-shell/fish-shell/issues/805 spend a little time discussing what a fishy version of this might look like.
If the script is short, prefixing each line with and might not be too bad:
cp file1 file2
and rm file1
and echo File moved
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