Multiline shebang: Difference between revisions
Added Wren
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arg[3]="3"
$</pre>
=={{header|Wren}}==
Wren doesn't support multiline shebangs as such. Anything after the first line is always interpreted as Wren code.
You can get around this by placing shell commands in a block comment after a single line shebang. So (ignoring the strange error message) the following works:
<lang ecmascript>#!/bin/bash
/*
echo "Hello from bash"
/bin/wren multiline_shebang.wren
exit
*/
System.print("Hello from Wren")</lang>
{{out}}
<pre>
$ chmod +x multiline_shebang.wren
$ ./multiline_shebang.wren
./multiline_shebang.wren: line 2: /bin: Is a directory
Hello from bash
Hello from Wren
</pre>
<br>
However, we don't actually need a multiline shebang to get the script name as this is always passed automatically as the second command line argument when the Wren process is spawned, the first argument being the Wren executable itself. Moreover, if a single line shebang is used, the third argument will be the shell command used to execute the script.
<lang ecmascript>#!/bin/wren multiline_shebang.wren
import "os" for Process
var args = Process.allArguments
System.print("Executable : %(args[0])")
System.print("Script name : %(args[1])")
System.print("Shell command : %(args[2])")
if (args.count > 3) {
for (i in 3...args.count) System.print("Argument %(i-2) : %(args[i])")
}</lang>
{{out}}
<pre>
$ ./multiline_shebang.wren
Executable : /bin/wren
Script name : multiline_shebang.wren
Shell command : ./multiline_shebang.wren
Argument 1 : one
Argument 2 : two
Argument 3 : three
</pre>
=={{header|zkl}}==
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