TeXSmith Fragment - HEIG-VD Logo

A TeXSmith fragment that drops the HEIG-VD letterhead logo on the first page of a document.

Install

uv add texsmith-fragment-heig-logo
# or
pip install texsmith-fragment-heig-logo

The package registers a heiglogo fragment via the texsmith.fragments entry-point group, so TeXSmith picks it up automatically — no path configuration needed.

Usage

In your document's YAML front matter (or in texsmith.yaml), append the fragment to the rendering pipeline:

press:
  template: article
  fragments:
    append:
      - heiglogo
heiglogo:
  color: false   # set to true for the red HEIG-VD logo
  year: auto     # auto | 1998 | 2004 | 2009 | 2020

(The legacy top-level fragments: key is still honoured by TeXSmith 0.8.)

The logo is positioned 1 cm from the top-left of the page on every page of the document.

Logo vintages

The bundled package supports the historical HEIG-VD logos (its vintages): 1998, 2004, 2009 and 2020 (the current letterhead). Pick one in two ways:

• Explicitly — set heiglogo.year to a vintage:

  heiglogo:
    year: 2004
  

• Automatically from the document date (the default, year: auto) — the vintage in force when the document was written is selected from the front matter date. Each vintage applies from its introduction year up to the next one:

  Document date	Logo vintage
  before 2004	1998
  2004 – 2008	2004
  2009 – 2019	2009
  2020 and later	2020

  When no usable date is available, the current logo (2020) is used.

Attributes

Demo

demo/demo.sh renders the same document across several dates and explicit vintages, then compiles a PDF for each so you can compare the logos:

./demo/demo.sh              # render + build PDFs with xelatex
NO_BUILD=1 ./demo/demo.sh   # LaTeX only, no PDF

Output (one folder per scenario) lands under demo/output/.

Requirements

• TeXSmith ≥ 0.8, < 1.0
• A LaTeX engine with xelatex or lualatex (the bundled heiglogo.sty uses fontspec and refuses pdflatex).
• The TeX Gyre Heros font family (already present in standard TeX Live distributions).

How it works

The package ships these files under src/texsmith_fragment_heig_logo/fragment/:

• heiglogo.sty — the docstrip-generated LaTeX package (now multi-vintage).
• heiglogo.jinja.tex — a one-line Jinja template that calls \AddToShipoutPictureBG*{\logo[..., year=NNNN]}.
• fragment.toml — the manifest TeXSmith reads when the fragment is resolved by path; it names the same entrypoint as the texsmith.fragments entry point, so both routes yield the same object.

Choosing the vintage from the document date needs a little Python, so the fragment is registered as an object rather than a bare directory. _fragment.py defines HeigLogoFragment, a TeXSmith BaseFragment whose build_config() reads the date from the render context and resolves the vintage (the pure logic lives in _vintage.py). The entry point is a lazy factory:

[project.entry-points."texsmith.fragments"]
heiglogo = "texsmith_fragment_heig_logo:load_fragment"

When TeXSmith starts, its FragmentRegistry._discover_entry_points() scans the texsmith.fragments group, calls load_fragment(), and registers the returned fragment as if it were built-in. The factory is lazy (and the package avoids importing TeXSmith at module load) to sidestep a circular import: TeXSmith builds its registry while it is itself being imported.

Regenerating heiglogo.sty from upstream

heiglogo.sty is a generated artefact; the canonical sources live at HEIG-VD/logos as a .dtx file. To refresh the bundled copy:

git clone https://github.com/HEIG-VD/logos
cd logos/heig-vd/latex
latex heiglogo.ins          # docstrip: heiglogo.dtx -> heiglogo.sty
cp heiglogo.sty <this-repo>/src/texsmith_fragment_heig_logo/fragment/heiglogo.sty

Then make the copy self-contained: upstream's \ProvidesPackage line expands \HeigGitDate / \HeigGitTag, which are CI-generated into version.tex (only the documentation driver defines fallbacks). Insert matching \providecommand lines just after \NeedsTeXFormat, using the vendored commit's date and short hash, e.g.:

\providecommand\HeigGitDate{2026/06/04}
\providecommand\HeigGitTag{34e9c6e}

Bump the package version and commit.

Licence

• The wrapper code (Python module, manifest, Jinja template, build configuration) is released under the MIT license — see LICENSE.
• The bundled heiglogo.sty file is distributed under the LaTeX Project Public License (LPPL) 1.3c or later — see LICENSE-LPPL and the upstream repository.