Re: fundamental problem with gub's regtest tarball

[Knut Petersen]

On 19.12.18 00:13, Werner LEMBERG wrote:
> Folks,
>
>
> we have an unfortunate dependency on the private directory layout of
> the guy who has created
>
>    lilypond-2.19.82-1.test-output.tar.bz2
>
> (this file is needed for completing a gub build of lilypond).
>
> For example, on my openSuSE box ghostscript aborts with
>
>    Error: /undefinedfilename in --file--
>    Operand stack:
>       (/home/gub/NewGub/gub/target/linux-x86/.../otf/emmentaler-20.otf)  (r)
>        ^^^^^^^^^^^^^^^^
>    [...]
>    Last OS error: No such file or directory

Yep. It is a known limitation that you have to be the user gub and that the gub 
git repository must be the subdirectory gub in ~/gub/NewGub.

> Additionally, the fontconfig setup must be adjusted to not use any
> fonts outside of gub.  For example, the header in file
> `accidental-ancient-1.eps' generated by my gub installation contains
> the following.
>
>    %%BeginFont: Emmentaler-20
>    (/home/wl/.fonts/emmentaler-20.otf) (r) file .loadfont
>    %%EndFont
>
>    %%BeginFont: Emmentaler-20
>    
> (/home/wl/git/gub/target/linux-64/root/usr/share/lilypond/current/fonts/otf/emmentaler-20.otf)
>  (r) file .loadfont
>    %%EndFont

Unrelated to gub, it's a  problem of lilypond. We should be able to easily 
define a font search path for fonts in lilypond and to use a font by its 
pathname.

For current versions of lilypond it's a very bad idea to put copies of 
emmentaler fonts in places like ~/.fonts.

If e.g. you include pdfs generated by lilypond in *latex documents, if those pdfs are generated with -O TeX-GS and if ghostscript is used as a postprocessor for the pdfs generated by *tex, ghostscript might (depending on the command line) use the fonts in ~/.fonts and not the emmentaler fonts that 
belong to the version of lilypond that created the embedded pdfs. We don't have a fixed encoding for our glyphs, whenever a new symbol is added to the emmentaler fonts the fonts are incompatible to the previous versions whenever a glyph is not referenced by its name.

Knut