Re: LilyPond 2.22.1 convert-ly adds blank lines when converting 2.18.0 using Windows 10 Home

[Michael Käppler]

Am 12.01.2022 um 20:02 schrieb Stu McKenzie:
> Environment: Microsoft Windows 10 Home, Version 10.0.19043 Build 19043.
>
> I've installed the following versions of LilyPond, with the result
> listed:
> Version Result
> 2.20.0   does not add blank lines.
> 2.22.0   adds blank lines.
> 2.22.1   adds blank lines.
>
> I haven't tried interim versions 2.21.0 or 2.21.2.  I thought it best
> to concentrate on the latest release.
>
> I've simplified the test file down to a "Tiny Example" of 2 lines
> (filename Simply2Lines.ly):
> \version "2.18.0"
> % Single line comment.
>
> Using Command Prompt, in the folder containing the LilyPond file, I
> used the command:
> "C:\Program Files (x86)\LilyPond\usr\bin\python" "\Program Files
> (x86)\LilyPond\usr\bin\convert-ly" -e Simply2Lines.ly
>
> The Command Line OUTPUT was:
> convert-ly (GNU LilyPond) 2.22.0
>
> convert-ly: Processing `Simply2Lines.ly'...
> Applying conversion: 2.19.2, 2.19.7, 2.19.11, 2.19.16, 2.19.22,
> 2.19.24, 2.19.28, 2.19.29, 2.19.32, 2.19.39, 2.19.40, 2.19.46,
> 2.19.49, 2.20.0, 2.21.0, 2.21.2, 2.22.0
>
> The resultant file now has 3 lines (one blank line between the
> original lines):
> \version "2.22.0"
>
> % Single line comment.
>
> All files converted with 2.22.0 or 2.22.1 have extra blank lines
> inserted between every original line.
>
> The desired behavior is to change the version string and only the
> relevant LilyPond commands without adding blank lines.
Thanks for your bug report. I can confirm this Windows-related issue,
which is now tracked as
https://gitlab.com/lilypond/lilypond/-/issues/6260
It is related to the automatic conversion of newline characters to
platform-dependent versions, i.e.
LF->CRLF on Windows.
A fix is in preparation.

Michael