Single script to run in both Windows batch and Linux Bash?

Question

Is it possible to write a single script file which executes in both Windows (treated as .bat) and Linux (via Bash)?

I know the basic syntax of both, but didn\'t figu

Answer 1

The previous answers seem to cover pretty much all the options and helped me a lot. I'm including this answer here just to demonstrate the mechanism I used to include both a Bash script and a Windows CMD script in the same file.

LinuxWindowsScript.bat

echo >/dev/null # >nul & GOTO WINDOWS & rem ^
echo 'Processing for Linux'

# ***********************************************************
# * NOTE: If you modify this content, be sure to remove carriage returns (\r) 
# *       from the Linux part and leave them in together with the line feeds 
# *       (\n) for the Windows part. In summary:
# *           New lines in Linux: \n
# *           New lines in Windows: \r\n 
# ***********************************************************

# Do Linux Bash commands here... for example:
StartDir="$(pwd)"

# Then, when all Linux commands are complete, end the script with 'exit'...
exit 0

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

:WINDOWS
echo "Processing for Windows"

REM Do Windows CMD commands here... for example:
SET StartDir=%cd%

REM Then, when all Windows commands are complete... the script is done.

Summary

In Linux

The first line (echo >/dev/null # >nul & GOTO WINDOWS & rem ^) will be ignored and the script will flow through each line immediately following it until the exit 0 command is executed. Once exit 0 is reached, the script execution will end, ignoring the Windows commands below it.

In Windows

The first line will execute the GOTO WINDOWS command, skipping the Linux commands immediately following it and continuing execution at the :WINDOWS line.

Removing Carriage Returns in Windows

Since I was editing this file in Windows, I had to systematically remove the carriage returns (\r) from the Linux commands or else I got abnormal results when running the Bash portion. To do this, I opened the file in Notepad++ and did the following:

1. Turn on the option for viewing end of line characters (View> Show Symbol > Show End of Line). Carriage returns will then show as CR characters.

2. Do a Find & Replace (Search > Replace...) and check the Extended (\n, \r, \t, \0, \x...) option.

3. Type \r in the Find what : field and blank out the Replace with : field so there's nothing in it.

4. Starting at the top of the file, click the Replace button until all of the carriage return (CR) characters have been removed from the top Linux portion. Be sure to leave the carriage return (CR) characters for the Windows portion.

The result should be that each Linux command ends in just a line feed (LF) and each Windows command ends in a carriage return and line feed (CR LF).