Re: Hacking a source filter into the #! line

The filter only gets the source that follows the use statement (whether inserted by -M or present in the source), so you can simply use

#!/usr/bin/perl
use yX;
...
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For example,

$ cat yX.pm
package yX;

use Filter::Simple sub {
   tr/n-za-mN-ZA-M/a-zA-Z/;
};

1;
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$ cat a.pl
#!/usr/bin/perl
use yX;
cevag("Uryyb, Jbeyq!\a");
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$ a.pl
Hello, World!
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Comment on Re: Hacking a source filter into the #! line Select or Download Code

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Re^2: Hacking a source filter into the #! line by dcmertens (Scribe) on Jul 24, 2014 at 17:23 UTC
For some reason my reply didn't post. The problem with this approach is that LyX expects the very first non-hash-commented line to be "\lyxformat 474" (or some other number). The only lines that I can modify without breaking LyX's ability to load the document are the #-comment lines, so I need some way to instruct Perl to do something within that line. Thus, #! fun. :-)	[reply]