The #! marker at the beginning of scripts is called a shebang.
The #! marker at the beginning of scripts is called a shebang.
See
Questions tagged [shebang]
486 questions
31
votes
4 answers
How to execute a java script with jshell?
Given that Java 9 is upon us and we can finally have a java REPL with jshell I was hoping there was a way to add a shebang to a script and have jshell interpret it.
I tried creating test.jsh:
#!/usr/bin/env jshell -s
System.out.println("Hello…
steinybot
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29
votes
1 answer
Bash shebang option -l
I use a script, test.sh, written by someone else, the begins with a bash shebang:
#!/bin/bash -l
...
echo TEST: $TEST
From what I could see, this has an effect on variables used inside the script:
if I run TEST=hey ./test.sh, I can see TEST: hop,…
Emmanuel
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28
votes
1 answer
Make Node.js support the shebang (#!) for JavaScript files
Some scripting languages (such as Python or Bash) use # for comments.
#!/usr/bin/env python
print 'hello, world'
I can run the script:
python script.py
Or
./script.py
Is it possible to make JavaScript support shebang?
kev
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27
votes
3 answers
Shebang and Groovy
Is it possible to declare at the start of a file that it should be executed as a Groovy script?
Examples for other scripting languages:
#!/bin/sh
#!/usr/bin/python
#!/usr/bin/perl
Nulldevice
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27
votes
1 answer
How to make python scripts executable on Windows?
Possible Duplicate:
Set up Python on Windows to not type python in cmd
When I use python on Linux, or even Mac OS from command line, I take advantage of the shebang and run some of my scripts directly, like so: ./myScript.py. I do need to give…
Hamish Grubijan
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26
votes
2 answers
Makefile as an executable script with shebang?
Is it possible to create an executable script that would be interpreted by make?
I tried this:
#!/usr/bin/env make --makefile=/dev/stdin
main:
@echo Hello!
but it does not work - hangs until press Ctrl-c.
Aleksandr Levchuk
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24
votes
3 answers
Java 11: Executing Source File via Shebang is not working
I wanted to check out some new features of java 11 which was released two days ago.
JEP 330 states that I could launch a Java-Source-Code-Program without compiling.
It should also support the usage of Shebang-Files.
Hence I have written this small…
mam10eks
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24
votes
4 answers
Shell script shebang for unknown path
Is it possible to specify a shebang line without knowing the path of the program you want to do the executing?
maybe don't specify the path
#!node
or specify several options
#!/usr/local/bin/node
#!/usr/bin/node
Extra points for cross platform…
Billy Moon
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22
votes
8 answers
Is there a standard way to make sure a python script will be interpreted by python2 and not python3?
Is there a standard way to make sure a python script will be interpreted by python2 and not python3? On my distro, I can use #!/usr/bin/env python2 as the shebang, but it seems not all distros ship "python2". I could explicitly call a specific…
static_rtti
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22
votes
1 answer
Why can't the import command be found?
I am using the input function from fileinput module to accept script via pipes or input file Here is the minimum script:
finput.py
import fileinput
with fileinput.input() as f:
for line in f:
print(line)
After making this script…
styvane
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21
votes
3 answers
How to Make my R script executable?
I am aware this is at high risk of being a duplicate, but in none of the other questions here I have found an answer to my problem. Below is a summary of what I have already tried.
I have an R script file file.r:
#!/usr/bin/env Rscript
print("Hello…
k88074
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21
votes
3 answers
Require ruby file without .rb extension?
I have a ruby file that does not have a .rb extension, and is instead identified as ruby code with a shebang at the beginning of the file: #!/usr/bin/env ruby. I want to require the code in this file in another ruby file, but it seems to be having…
Kvass
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20
votes
5 answers
How to check syntax of ruby script that has script/runner as a shebang?
I have problems to check syntax of ruby scripts that has rails script/runner on its shebang.
Here are two example scripts and how they responses to ruby syntax checking:
Script hello_world_runner.rb:
#!/usr/bin/env script/runner
p "Hello…
Joni
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20
votes
5 answers
How to execute Rust code directly on Unix systems? (using the shebang)
From reading this thread, it looks like its possible to use the shebang to run Rust *.
#!/usr/bin/env rustc
fn main() {
println!("Hello World!");
}
Making this executable and running does compile, but not run the code.
chmod +x…
ideasman42
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20
votes
8 answers
What does #!/usr/bin/... at the start of a file mean?
I can do something like this in Haskell:
#!/usr/bin/runghc
main=putStrLn "Hello World"
Then I can run it with ./hello.hs
My question is, why is the first line ignored? Comments in haskell start with -- but the first line still seems to be ignored.…
Lucky
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