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
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
curl --fail .... It makes curl stop on a 404, for example. A common set of options is -fsSL (-f is the short version of --fail).
curl -fsSL https://starship.rs/install.sh | bash -s -- --yes.try
curl http://foo.com/script.sh | bash -s arg1 arg2
bash manual says:
If the -s option is present, or if no arguments remain after option processing, then commands are read from the standard input. This option allows the positional parameters to be set when invoking an interactive shell.
-p blah -d blah?
read in script is directly ignored by this way, how to fix this?
Other alternatives:
curl http://foo.com/script.sh | bash /dev/stdin arguments
bash <( curl http://foo.com/script.sh ) arguments
-, i.e. options
Building on others' answers, if you want your bash script to use pipes, try:
cat myfile.txt | \
bash -c "$(curl http://example.com/script.sh )" -s arg1 arg2
Example usage:
#!/usr/bin/env bash
export MYURL="https://raw.githubusercontent.com/sohale/snippets/master/bash-magic/add-date.sh"
curl http://www.google.com | \
bash -c "$(curl -L $MYURL )" -s " >>>>> next line 🕶👉"
If you use bit.ly to shorten the url, don't forget the -L.
