http://qs321.pair.com?node_id=11119259


in reply to Re^2: RFC: Version::Easy
in thread RFC: Version::Easy

This module would replace the boilerplate of $VERSION =~ tr/_//d; with the new boilerplate of use Version::Easy;. This doesn't seem like a significant improvement, and adds several dependencies. use version; already accomplishes basically the same thing as this module.

The original question was about a test that was extracting a version number using MM->parse_version. Any tool doing "static" version extraction isn't aided by a module like Version::Easy.

Replies are listed 'Best First'.
Re^4: RFC: Version::Easy
by LanX (Saint) on Jul 13, 2020 at 21:17 UTC
    > the new boilerplate of use 'Version::Easy'

    • It's far easier to explain use MODULE to a beginner
    • as already said, this could already be activated in a meta package
    • you don't need an our declaration
    • you can catch format errors right when developing
    • you can catch multiple $VERSION errors by making it readonly

    > Any tool doing "static" version extraction isn't aided by a module like Version::Easy.

    I think you were the one suggesting using tr/_// after declaration, in which way do static parsers do better with your approach?

    I think you were the one pointing to the need for developers to check $VERSION in the their tool chain, like test suite?

    An object is more robust towards comparing different formats.

    > and adds several dependencies.

    I only used core modules, and version.pm is loaded anyway in every Perl run using use.

    The dependency to Tie::StdScalar could easily be removed.

    Questions

    • I realize that MakeMaker documents that it can't parse v-strings but I can't find the code for ->parse_version and my tests show any quoted string.°
    • Who exactly calls MakeMaker? The author using a recent Perl, or the user who might be using Perl 5.8?
    • it's it possible to install a new version of MakeMaker via dependency?

    Cheers Rolf
    (addicted to the Perl Programming Language :)
    Wikisyntax for the Monastery

    °) looks like v-string here means the literal v1.2.3 notation while quoted strings "v1.2.3" are ok

[reply]
[d/l]
[select]

      "version.pm is loaded anyway in every Perl run using use."

      No, it isn't.

      $ perl -e'use strict;use warnings;CORE::say for sort keys %INC'
strict.pm
warnings.pm

      [download]
      toby döt ink
[reply]
[d/l]
        > No, it isn't.

        Something is ...

        ... running B::Xref on a minimalist script shows the namespace being magically populated 

        t_float.pl       (definitions)     0 version         & (""            
+  subdef
t_float.pl       (definitions)     0 version         & ()             
+  subdef
t_float.pl       (definitions)     0 version         & (*             
+  subdef
t_float.pl       (definitions)     0 version         & (*=            
+  subdef
t_float.pl       (definitions)     0 version         & (+             
+  subdef
t_float.pl       (definitions)     0 version         & (+=            
+  subdef
t_float.pl       (definitions)     0 version         & (-             
+  subdef
t_float.pl       (definitions)     0 version         & (-=            
+  subdef
t_float.pl       (definitions)     0 version         & (/             
+  subdef
t_float.pl       (definitions)     0 version         & (/=            
+  subdef
t_float.pl       (definitions)     0 version         & (0+            
+  subdef
t_float.pl       (definitions)     0 version         & (<=>           
+  subdef
t_float.pl       (definitions)     0 version         & (abs           
+  subdef
t_float.pl       (definitions)     0 version         & (bool          
+  subdef
t_float.pl       (definitions)     0 version         & (cmp           
+  subdef
t_float.pl       (definitions)     0 version         & (nomethod      
+  subdef
t_float.pl       (definitions)     0 version         & _VERSION       
+  subdef
t_float.pl       (definitions)     0 version         & boolean        
+  subdef
t_float.pl       (definitions)     0 version         & declare        
+  subdef
t_float.pl       (definitions)     0 version         & is_alpha       
+  subdef
t_float.pl       (definitions)     0 version         & is_qv          
+  subdef
t_float.pl       (definitions)     0 version         & new            
+  subdef
t_float.pl       (definitions)     0 version         & noop           
+  subdef
t_float.pl       (definitions)     0 version         & normal         
+  subdef
t_float.pl       (definitions)     0 version         & numify         
+  subdef
t_float.pl       (definitions)     0 version         & parse          
+  subdef
t_float.pl       (definitions)     0 version         & qv             
+  subdef
t_float.pl       (definitions)     0 version         & stringify      
+  subdef
t_float.pl       (definitions)     0 version         & vcmp           
+  subdef
t_float.pl       (main)           3 float           $ VERSION         
+ intro

        [download]

         d:\exp\version>type t_float.pl
package float;

our $VERSION = 'v1.0234';

d:\exp\version>

        [download]

        Cheers Rolf
        (addicted to the Perl Programming Language :)
        Wikisyntax for the Monastery

[reply]
[d/l]
[select]

In Section Meditations