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For those new to it,TeX is a programming language that you use to createtypeset documents rather than computer software. TeX is quite archaic in some ways, but it’s still the tool of choice for documents that require precision typography or ones that involve lots of mathematical equations, which makes it especially important in the sciences. Tectonic converts TeX files intoPDF files.

What’s in it for me?

• Tectonicautomatically downloads support files so you don’t have to install a full LaTeX system in order to start using it. If you start using a new LaTeX package, Tectonic just pulls down the files it needs and continues processing. The underyling “bundle” technology allows forcompletely reproducible document compiles.Thanks tothe Dataverse Project for hosting the large LaTeX resource files!
• Tectonic has sophisticated logic andautomatically loops TeX and BibTeX as needed, and only as much as needed. In its default mode itdoesn’t write TeX’s intermediate files andalways produces a fully-processed document.
• Thetectonic command-line program isquiet and never stops to ask for input.
• Thanks to the power of XeTeX, Tectonic can usemodern OpenType fonts and isfully Unicode-enabled.
• The Tectonic engine has been extracted into acompletely self-contained library so that it can be embedded in other applications.
• Tectonic has been forked from the old-fashioned WEB2C implementation of TeX and isdeveloped in the open onGitHub using modern tools likethe Rust language.
• Tectonic can be used from Github Actions to typeset your documents whenever a change to them is made:
  • setup-tectonic - Use tectonic in your github action workflows (supports caching and optionally biber)
  • compile-latex -Thanks toVinay Sharma for creating the action.

user@host $ tectonic paper.texRunningTeX ...note: warnings were issued by the TeX engine; use --print and/or --keep-logs for details.RunningBibTeX ...RerunningTeX because bibtex was run ...RerunningTeX because "paper.aux" changed ...RerunningTeX because "paper.aux" changed ...Runningxdvipdfmx ...Writingpaper.pdf (383521 bytes)Skipped writing3 intermediate files (use --keep-intermediates to keep them)user@host $

About the name

The name of the project is “Tectonic,” spelled and pronounced like a regular word because it is one. Enough with the cutesy obscurantism. In cases where the name might lead to ambiguities, it should be expanded to “Tectonic typesetting.”

If you’re feeling expansive, you can interpret the name as suggesting a large change in the TeX world. Or you can think of it as suggesting a salubrious offering for weary TeX users. Either way, the root of the word does go back to the ancient Greek τέκτων, ”carpenter,” which Donald Knuth — the creator of TeX and a devout Christian — might appreciate.

Acknowledgments

Tectonic would not have been possible withoutdecades’ worth of hard work by the people behindLaTeX,TeXLive,XeTeX, and(x)dvipdfm-x. We stand on the shoulders of giants!

The Dataverse Project kindly hosts the large bundles of LaTeX resource files that enable Tectonic’s web-download capabilities.

Copyright and licensing

Tectonic is licensed under the MIT License. This is the license under which the codebase from which it is primarily derived, XeTeX, is distributed. Various other elements of the TeX system on which Tectonic is based are licensed under other open-source licenses.