Passing parameters to bash when executing a script fetched by curl

Question

I know how to execute remote Bash scripts like this:

curl http://example.com/script.sh | bash 

or

bash < <( curl http://example.com/script.sh ) 

which give the same result.

But what if I need to pass arguments to the bash script? It's possible when the script is saved locally:

./script.sh argument1 argument2 

I tried several possibilities like this one, without success:

bash < <( curl http://example.com/script.sh ) argument1 argument2 

Answer 1

To improve on jinowolski's answer a bit, you should use:

curl http://example.com/script.sh | bash -s -- arg1 arg2 

Notice the two dashes (--) which are telling bash to not process anything following it as arguments to bash.

This way it will work with any kind of arguments, e.g.:

curl -L http://bootstrap.saltstack.org | bash -s -- -M -N stable 

This will of course work with any kind of input via stdin, not just curl, so you can confirm that it works with simple BASH script input via echo:

echo 'i=1; for a in $@; do echo "$i = $a"; i=$((i+1)); done' | \ bash -s -- -a1 -a2 -a3 --long some_text 

Will give you the output

1 = -a1 2 = -a2 3 = -a3 4 = --long 5 = some_text