Package dependencies in style file included by class file not recognized

[mvscheven]

Hello,

in my LaTeX project I am including my own style-files in which all required style-files (e.q. amsmath) are included. For the LaTeX build process this works fine, but in the editor the align environment is marked in red with the remark "Environment requires amsmath package".

This problem appears for packages included in other style-files (nested) or included in the class declaration.

Best regards,
Malte

[PHPirates]

Can you provide a minimal working example which shows the problem? Because this works for me:

main.tex:

\documentclass{article}
\usepackage{mystyle}
\begin{document}
    \begin{align*}
        \pi
    \end{align*}
\end{document}

mystyle.sty:

\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{PACKAGE_NAME}[2019/10/30 malte's Package]

\RequirePackage{amsmath}

[mvscheven]

I believe there to be similar but different problems:

1. include in custom class file:

main.tex:

\documentclass{class}
\begin{document}
  \begin{align*}
    \pi
  \end{align*}
\end{document}

class.cls:

\NeedsTeXFormat{LaTeX2e}
\ProvidesClass{class}[2019/10/31]
\LoadClass{article}
\RequirePackage{style}
\endinput

style.sty:

\ProvidesPackage{style}[2019/10/31]
\RequirePackage{amsmath}
\endinput

For the LaTeX build process this works fine, but in the editor the align environment is marked in red with the remark "Environment requires amsmath package".

[mvscheven]

2. include in custom style file:

main.tex:

\documentclass{article}
\usepackage{style}
\begin{document}
    \begin{align*}
        \pi
    \end{align*}
\end{document}

style.sty:

\ProvidesPackage{style}[2019/10/31]
\RequirePackage{amsmath}
\endinput

As you state this works fine, but only if the custom style file is in the project directory! If the custom style file "style.sty" is in a different directory in the TEXINPUTS path, the nested include is not recognised.

Best regards,
Malte

[PHPirates]

1. Thanks for the example, indeed that's a bug.
2. Ah, but then it's like a package you install from ctan, and those ones we do not index at the moment (it would take way too much time at least). That's for further in the future.

[mvscheven]

ad 2: It is similar. Packages from ctan installed by MikTex, TexLive,... are in a system directory. The paths in TEXINPUTS only contain additional directories and in many cases only a very limited number of style files.

[PHPirates]

and in many cases only a very limited number of style files.

Good point, had not realised that. Will think about it, if it's easy to add.