How to run bash script from anywhere?-CodePudding

The problem is that I wrote a bash script that handle files. If I add this script to bashrc I can't find the file. I could write the absolute path but I would like to compress the directory and send it to others. It could be so bad if no one could use my script because the path. The project looks like: DIR A

Script
ReadMe
DIR B
- Python Script
- File

The Script call the Python script and the Python script read from the File. I would like to call the Script as an enviroment variable from anywhere but I can't because it can't find the Python script and the file. Is there a way to call the script like it is in the directory next to DIR B? Like a realpath or I don't know. I'm not really good at this. :( Thank you so much!

CodePudding user response：

chmod  x my_script.sh # make it executable
# create a link in your bin folder
sudo ln -s /usr/local/bin/my_script.sh $(pwd)/my_script.bat

youll want to make sure your script starts with the shebang

#! /bin/bash

finally invoke it as just

$ my_script.sh  some arguments 5

instead of

$ . my_script.sh

$ source my_script.sh

you can create an install method to do all of these steps for other users of your program ...

but this sounds sort of like an x/y problem (ie this does what your question asks, but maybe doesnt solve your underlying problem)

CodePudding user response：

If the bash-script is sourced, it is always

scriptname=$(realpath "$BASH_SOURCE")

Therefore, the directory of the sourced bash-script is always

dir=$(dirname "$scriptname")

A simple

cd "$dir"

before calling the python script would do the trick.

Note, that if you do not source the script, "$BASH_SOURCE" will be empty. You can test for this to make sure that the script is sourced:

if [ "$BASH_SOURCE" = "" ] ; then
    echo "This script should be sourced, not executed"
fi

CodePudding user response：

I think I've solved the problem. It's not so elegant, but it works. I don't want to use "cd" because I think it's a little bit ugly to cd to folders cd back... In the bash script I use the dirname $0 to get the script path and concatenate with the other path of files like:

path=`dirname $0`
scriptpath="$path/dirB/python.py"
filepath="$path/dirB/file"

I gave the $filepath to the python script as an argument and it works like: (in the script call python function)

python3 $scriptpath $filepath $@

And I can read the file in the Python script like:

f = open(sys.argv[1], "r")

Thank you for all the answers! Have a beautiful day!