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file format extensions

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Richard Hainsworth
December 30, 2021 11:20
file format extensions
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I'm revising how I name files that are included in my modules. With the 
name change to Raku, the file extensions also changed for script and 
module files.

In addition Jonathan has defined some format extensions for Cro files, 
and I am sure there would be other developers who would like to claim 
unique extension names for files.

This is not a post intended to start a war about file extensions, that 
is whether they should exist in a modern file system. For whatever 
reason they came into being, a significant number of users, such as 
myself, find them useful, if only as a mnemonic for their files' 
probable contents.

It seems to me a short page in the would be useful with 
the various file extensions, and so if a developer wanted for a custom 
file extension to be primarily applied to some new module, the way to do 
would be to create a PR on the documentation file.

If this post gets some positive responses, then I'll write the POD6 file 
for inclusion in and create a PR for inclusion.

[Another naming question would be the name of the markup language - as 
distinct from the file extension - for documentation. For Perl it is 
POD, for Perl6 it was natural to use POD6. POD stands for Plain Old 
Documentation, but I think that POD6 is neither Plain, nor Old. How 
about RDM for Raku documentation markup? ]

There is a wrinkle in that Raku best practice has evolved in line with 
the evolution of perl6 into Raku. So it seems reasonable to have 
previous file formats listed as well.

The following are what I think are the current best practices. Since I 
have been out of circulation for a while, the list is likely not 
exhaustive and may be wrong. I am certain there are other file types I 
have not included.

For each file type, extensions on the left are earlier, and the 
extension of the far right (after the TAB) is considered best practice

Perl6 / Raku script: .pl, .pl6, <TAB> .raku

Perl6 / Raku Module: .pm, .pm6, <TAB> .rakumod

Perl6 / Raku Standalone Documentation (POD6 can be included in a script 
or module file): .pm, .pm6, .pod, .pod6, <TAB> .rakudoc

NQP file: <TAB> .nqp

Cro template: <TAB> .crotmp

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