Re^4: Supressing warnings

Yeah, ok there may be some uses like yours (which I would consider a hack), but in general (at least that would be the behaviour of least surprise) you (ok: I) would expect that when you run a script as "a.pl" you get your command-line flags from the shebang-line and when you run it as "perl <whatever flags> a.pl" your get it from - well - the command line.

With this behaviour I cannot run a script with different flags without having to modify it if it contains a shebang lines with flags.

Do Python and Ruby do this as well?

Comment on Re^4: Supressing warnings

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Re^5: Supressing warnings by almut (Canon) on Jul 23, 2010 at 00:14 UTC
With this behaviour I cannot run a script with different flags without having to modify it if it contains a shebang lines with flags. You could also argue the other way round, i.e. it provides for consistency independently of how exactly the interpreter is being invoked — in particular as there are some operating system that don't handle shebangs (one rather commonly used one is among them...). And some options might be an integral part of a script, or at least important to its proper functioning — like `-n`, `-p`, `-l`, `-C` (which didn't work on the shebang line until recently, btw), etc. — so I would rather want them to remain in effect when I call the script as `perl myscript.pl` .	[reply] [d/l] [select]

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Re^5: Supressing warnings
by almut (Canon) on Jul 23, 2010 at 00:14 UTC

With this behaviour I cannot run a script with different flags without having to modify it if it contains a shebang lines with flags.

You could also argue the other way round, i.e. it provides for consistency independently of how exactly the interpreter is being invoked — in particular as there are some operating system that don't handle shebangs (one rather commonly used one is among them...).

And some options might be an integral part of a script, or at least important to its proper functioning — like -n, -p, -l, -C (which didn't work on the shebang line until recently, btw), etc. — so I would rather want them to remain in effect when I call the script as perl myscript.pl .

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