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I'm looking for ways to pass arguments to a script fetched from git using curl, and my script requires an argument.
Is there any way that arguments can be passed to script as following:

bash <(curl -Ls <git-script-path>)

Script usage: ./script.sh -p admin. I am trying to provide -p admin as bash <(curl -Ls <git-script-path>) -p admin

Any help will be appreciated. Thanks

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    will you illustrate a little bit what actually you needed ? Commented Nov 30, 2020 at 13:59
  • Scenario is, script reads interactive input as well as cmd line input, i want both to work with, such that I'll pass my cmd line arg to bash <(curl -Ls <git-script-path>) & after it runs, it will also ask for interactive arguments from user. Is there any way to achieve this? Commented Nov 30, 2020 at 14:36
  • I would suggest you to call it by creating a main.sh script embedded this in that it would be better ...!!! Commented Nov 30, 2020 at 15:41
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    Could you tell us how bash <(curl -Ls <git-script-path>) -p admin failed to do what you needed it to do? Commented Nov 30, 2020 at 16:22

3 Answers 3

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curl -Ls <git-script-path> | bash -s -- -p admin

This causes bash to read the shell commands from its standard input stream, which is connected to curl. The -p and admin are the two arguments that will be accessible as the positional parameters in the script. The -- is needed to signal the end of options for the bash executable.

Testing with a one-line script in script.sh which only does printf '"%s"\n' "$@" (outputs its command line arguments, quoted, on separate lines). We'll let cat script.sh be a stand-in for your curl command:

$ cat script.sh| bash -s -- -p admin
"-p"
"admin"

If your script requires interactivity, you can't read the script itself from standard input. Instead, provide the script via a filename:

$ bash <( curl -Ls <git-script-path> ) -p admin

This happens to be exactly what you have in your question. Note that this requires the current shell to understand process substitutions using <( ... ).

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  • Scenario is, script reads interactive input as well as cmd line input, i want both to work with, such that First I'll pass my cmd line arg to bash <(curl -Ls <git-script-path>) & after it runs, it will also ask for interactive arguments from user. Is there any way to achieve this? Commented Nov 30, 2020 at 14:37
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    @usergg123 See Pankis answer. Ideally, these requirements should have been mentioned in the question. Commented Nov 30, 2020 at 15:14
  • @usergg123 See updated answer. Commented Nov 30, 2020 at 15:49
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You can do this in separate steps. First, get the script and place it in a file:

curl -sL https://...git > script.sh

Make it executable:

chmod +x script.sh

And execute with params:

./script.sh -p admin

As a oneliner:

curl -sL https://...git > script.sh && chmod +x script.sh && ./script.sh -p admin

If you don't want to store the script permanently, you could do

tmpFile=$(mktemp) && curl -sL https://...git > $tmpFile && chmod +x $tmpFile && $tmpFile -p admin && rm $tmpFile
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If you want to pass arguments to the script, just add them to the command line:

bash <(curl -Ls <git-script-path>) -p admin

Example with command to just display the arguments:

$ bash <(echo 'echo args: "$@"') -p admin
args: -p admin
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