According to this post, VS Code is supposed to recognize shebangs in files without extensions, and associate those files with the Shell Script language mode. In that post, they say it works for the shebang #!/bin/sh. However, this doesn't seem to work for shebang #!/bin/bash. I need to use Bash for my project, otherwise I would just switch to the Shell Command Language (sh). Also, I cannot add the .sh extension to the end of the filename, because I'm submitting a batch job to a supercomputer, and the filename needs to be named using the following pattern: jobname-batch. Is there a way to configure VS Code to have the same behavior for extension-less Bash scripts than for extension-less Shell Command Language scripts?
Edit:
#Julia suggested in the comments to make the file executable, and that got it working. :) Thanks!
The "set the executable bit" trick works, but I'm not sure where that information is stored or if it's persisted across reboots. I just remembered a better solution: file associations!
Just add this to project/.vscode/vscode.json (the key should be the name of the file):
{
"files.associations": {
"jobname-batch": "bash"
}
}
Related
It is possible to supply batch commands directly with the -b flag, but if the commands become very long, this is no longer an option. Is there a way to give the path to an .scm script that was written to a file, without having to move the file into the scripts directory?
No as far as I know. What you give in the -b flag is a Scheme statement, which implies your function has already been loaded by the script executor process. You can of course add more directories that are searched for scripts using Edit>Preferences>Folders>Scripts.
If you write your script in Python the problem is a bit different since you can alter the Python path before loading the script code but the command line remains a bit long.
Is there a way to see the original code of a executable sh script. (I am very new to Linux and trying to understand what things do and such.)
If you know how I need very clear step by step process so I can just type i the commands and run them.
Thanks for your help. Trying to learn (Windows man for 25 years here)
A shell script specifically can be seen in the original text form by simply printing the contents of the file:
cat disk-space.sh.x
Several caveats:
If you mean an executable rather than a script the situation is different. Scripts are read by an interpreter at runtime, which then executes it line by line. Executables may be either scripts or ELF binaries. The latter have been transformed from the original source code to a machine readable form which is very much harder to read for humans.
The extension of the file (.sh.x or .x) does not control whether the file contents are executed as a binary or script.
If the file really is a script it may have been obfuscated, meaning that the source code on your system has deliberately been changed to make the resulting file hard to read.
I noticed that Windows 7 enables to execute .sh files as if they were .bat files. That got me wondering whether it is possible to write a .sh file such that it can be executed in Windows and Linux (let's say bash).
The first thing that comes to my mind is to fabricate an if-statement such that Windows and Ubuntu can deal with it and jump into the according block to execute plattform-specific commands. How could this be done?
Note: I know this is not good practice. I also know that scripting languages like Python are far better suited to solve this problem than a mixed-syntax command line script would be. I'm just curious...
You could use this:
rem(){ :;};rem '
#goto b
';echo sh;exit
:b
#echo batch
It's valid shell script and batch, and will execute different blocks depending on how it's run.
Modify the echo and #echo lines to do what you want.
AFAIK, you can't directly run .sh files from Windows' cmd.exe. For that you'll need a *nix emulation layer to run the shell. Check out Cygwin or Msys/MinGW
I have a bunch of scripts (which can't be modified) written on Windows. Windows allows relative paths in its #! commands. We are trying to run these scripts on Unix but Bash only seems to respect absolute paths in its #! directives. I've looked around but haven't been able to locate an option in Bash or a program designed to replace and interpreter name. Is it possible to override that functionality -- perhaps even by using a different shell?
Typically you can just specify the binary to execute the script, which will cause the #! to be ignored. So, if you have a Python script that looks like:
#!..\bin\python2.6
# code would be here.
On Unix/Linux you can just say:
prompt$ python2.6 <scriptfile>
And it'll execute using the command line binary. I view the hashbang line as one which asks the operating system to use the binary specified on the line, but you can override it by not executing the script as a normal executable.
Worst case you could write some wrapper scripts that would explicitly tell the interpreter to execute the code in the script file for all the platforms that you'd be using.
The general idea is pretty simple, I want to make a script for a certain task, I do it in the shell (any shell), and then I want to copy the commands I have used.
If I copy all the stuff in the window, then I have a lot of stuff to delete and to correct. (and is not easy to copy from shell)
Resume: I want to take all the things I wrote...
Is there an easy way to do this easy task?
Update: Partial solution
In bash, the solution is pretty simple, there is a history command, and there are ports of the idea:
IRB: Tweaking IRB
Cmd: Use PowerShell -> Get-History (or use cygwin)
Another Update:
I found that doskey have a parameter history to do this:
cmd: Doskey /history >> history.cmd
Yes, you can use:
history -w filename.sh
This will save your command history to filename.sh. You may need to edit that to keep just the lines at the end that are part of your command sequence.
NOTE: This is a bash command and will not work with all shells.
script may help here. Typing script will throw you into a new shell and save
all input and output to a file called typescript. When you're done with your interaction,
exit the shell. The file typescript is then amenable to grep'ing. For example, you might
grep for your prompt and save the output to the file. If you're a clumsy typist like me, then you may need to do some cleanup work to remove backspaces. There used to be a program that did thisbut I don't seem to find it right now. Here is one I found on the
'net: http://www.cat.pdx.edu/tutors/files/fixts.cpp
This approach is especially useful if you want to track and post on the web an entire interactive session.