Version v0.10.0 of SILE has been released and is available for download!
See the included CHANGELOG.md or review the commit history for more explicit details.
Summary of Improvements
Most of the many, many improvements in this release are under the hood.
The build and test systems have been significantly overhauled, the release process has been streamlined and partially automated, continuous integration now tests code quality and commit messages, and there has been an enormous amount of code refactoring.
All of these things make for a more readable code base and a more reliable and maintainable development environment, which we hope will facilitate SILE development in the future.
Creating installers should be easier for most platforms than in previous releases, and we hope future releases will come with more pre-built packages.
There are also some user-facing improvements:
- Installation is made easier, as SILE will now download and bundle the Lua modules that it requires.
For those who have their own Lua installation and wish to make use of dependent modules installed with
luarocks or their system’s package manager, use the
--with-system-luarocks argument to
- Error and warning reporting has been improved; SILE will now tell you where in the document any errors occurred and (with the
--trace option) the stack of commands it took to get there.
- Language support:
- Fixes to hyphenation in Danish, Greek, Finnish, and Ukrainian.
- French punctuation conventions are followed, with (optional) non-breaking spaces before high punctuation marks.
- Numbers can now be formatted as ordinals (at least for English and Turkish), by using the counter display type
nth, and as words using the
string display type.
- A new
text backend is available to dump a text-only version of the rendering process.
This can much more accurate that extracting text versions from a PDF later for search indexing or similar purposes.
- Improvements to tracking & letter spacing.
- Dependency system:
sile -m will output a Makefile snippet showing all the files required to build a SILE document.
- Adding the
toc=false option to a book section or subsection will cause it not to be added to the table of contents.
- Added a man page for quick reference of CLI options.
Notable Bug Fixes
- Boustrophedon, grid, and simpletable packages now work again.
- Temporarily switching away from fonts specified by filename into a verbatim environment won’t crash any more.
⚠ BREAKING CHANGE
This removes the auto-guessing file extension mechanism that allowed *.sil files to be loaded without specifying the full file name with extensions.
A command like
sile test will no longer find and build sile.sil, you must run
The mechanism that was doing this was a hack than only worked in some scenarios anyway, and dropping it instead of trying to cover all the edge cases will make it that much easier to use and document.
Importantly it avoids edge cases where both *.xml, *.sil, and/or *.lua files all have the same name and the loader really has so idea which one you mean.
Note that packages may still be loaded with no file extension, this does not affect the
require() mechanism that looks for *.lua and various other incantations by default.
This release renames and deprecates many internal functions and classes.
Most notably the default library used for class models has changed from
Old methods are still available for now, but those developing external Lua packages and classes will want to check the wiki for instructions on how to update their code.
The next release cycle will start throwing warnings when these deprecated functions are called, and the following cycle will remove them entirely.
SILE v0.9.5 Is Released
Version v0.9.5 of SILE has been released and is available for download! New in in this release:
Experimental package manager.
The "smart" bare percent unit (where SILE guessed whether you meant height or width) has now moved from deprecated to error. Replace with
Language support: variable spaces in Amharic (and other languages if enabled with the
shaper.variablespaces setting), improvements to Japanese Ruby processing, Uyghur hyphenation revisited and improved, Armenian hyphenation added.
You can now set the stretch and shrink values of a space using the
You can use
- as input filename to pipe in from standard input, and
- as output filename to pipe generated PDF to standard output.
ps (parskip) and
Links generated via the
url package are hyperlinked in the PDF.
You can now style folios (page numbers) by overriding the
Languages may define their own counting functions by providing a
counter function; you may also lean on ICU’s number formatting to format numbers.
ICU is now required for correct Unicode processing.
Experimental support for SVG graphics and fonts. (see
Users may select the Harfbuzz subshaping system used (
fallback etc.) by setting the
Fix typos in documentation (Thanks to Sean Leather, David Rowe).
Most other changes in this release are internal and non-user-visible, including:
Introduced vertical kern nodes.
Various fixes to pushback (end of page) logic, bidi implementation. ICU is now used for bidi.
Updated various examples to work with current internals.
Many and varied internal fixes and speedups, and improved coding style.
SILE v0.9.4 Is Released
After a year of development and many, many fixes, version v0.9.4 of SILE has been released and is available for download! It includes nearly 600 changes, including:
New packages include: letter spacing, multiple line spacing methods, Japanese Ruby, font specimen generator, crop marks, font fallback, set PDF background color.
Fixed handling of font weight and style.
Hyphenation: Correct hyphenation of Indic scripts, words with non-alphabetic characters in them, and allow setting hyphen character and defining hyphenation exceptions.
Relative dimensions ("1.2em") are converted to absolute dimensions at point of use, not point of declaration. So you can set linespacing to 1.2em, change font size, and it’ll still work.
Default paper size to A4.
Changes to semantics of percent-of-page and percent-of-frame length specifications. (
Much improved handling of footnotes, especially in multicolumn layouts.
Support for: the libthai line breaking library, color fonts, querying the system font library on OS X, multiple Amharic justification conventions.
Added explicit kern nodes.
Changed to using Harfbuzz for the text processing pipeline; much faster, and much more accurate text shaping.
Rewritten and more accurate bidirectional handling.
Removed dependency on FreeType; use Harfbuzz for font metrics.
Fixed the definition of an em. (It’s not the width of a letter "m".)
and much more besides.
(Note: This blog post was edited when the proof of concept example was moved from a package in an unreleased branch to this website’s example section.)
The ever-excellent xkcd has produced a table of full-width justification strategies:
Naturally, SILE can support snake-based justification.
Check out the code in the “Snake Justification” example on this site.
You can see the result in PDF form here, and it looks like this:
Because SILE is an extremely flexible typesetting engine, this took less than 20 lines of Lua code to implement.
We have been doing lots of other SILE development too, but snakes are fun.