Sigil-0.9.0 Released!

Sigil 0.9.0 is the first full post Sigil 0.8.7 release. It includes **all** of the changes and improvements from our Sigil-0.8.900 series of pre-releases and it has shown itself to be stable in our tests. The changes from our last pre-release Sigil-0.8.901 are almost all bug fixes:

  • Add “Use Bundled Python” option to bring sanity and choice to Python3 Interpreter selection

  • Merge EmbeddedPython code across platforms and fix python flags for all platforms

  • Properly build translation base.ts to prevent blank message fields being generated by tr()

  • Update to the latest translations from transifex

  • Allow PrettyPrint_Gumbo to condense whitespace where allowed

  • Fix bug in PluginRunner auto-repair modified xml (opf, ncx), do not check xml with xhtml wellformed check

  • Fix bug in plugin epub3 interface, conversion of properties with null strings to None

  • Restore ability to override hunspell dictionary locations on Linux with SIGIL_DICTIONARIES env var

  • Restore ability to build Sigil against system hunspell libraries on Linux

  • Adjust to try to find system hunspell if bundled hunspell is not built/installed

  • Fix hang/slowness in TOC creation when huge number of headings all exist in the same file

  • Performance speedups for NCX writing to help with slow ToC Creation

  • Fix bug for better detecting comments in

  • Fix bug for Adding Blank xhtml files to an epub3

  • Fix bug for Issue 140 – TOC gets cut-off under some platforms (lxml needs utf-8 not unicode)

  • Add cmake option INSTALL_BUNDLED_DICTS to enable/disable installation of bundled hunspell dictionaries

  • Allow SIGIL_DICTIONARIES env var to specify multiple paths (colon delimited)

  • Fix bug in error message creation

  • Identify woff files as fonts when importing epubs

  • Fixes for nbsp being potentially “lost” when linking in stylesheets and when splitting and merging chapters

  • Fix for lost whitespace inside text containing tags when pretty printing

  • Workaround for broken QShortCut in Qt 5.4.X see Issue 149
    – cleanup up some compiler warnings

One new “feature” is that the Mac OS X Package has been code signed.
It is hoped this release will provide a stable and up-to-date version of Sigil while development work begins on adding some additional epub3 support features.

The Sigil-0.9.0 release can be downloaded from:

Don’t Forget FlightCrew
Please note, the epub2 validator FlightCrew has been converted to a plugin for Sigil 0.8.900 and later.
This plugin reamins unchanged from the last release and can be downloaded from the official Sigil-Ebook flightcrew repository if you have not already installed it.

Attention Mac OS X Users
Per the recommendation of, see, due to bugs and the age of Apple’s internal Tcl library, you should also download and install ActiveState’s ActiveTcl Community Edition.

To get the latest bug fixes, Sigil-0.9.0’s embedded Python has been linked with the very latest version: Tcl

We may not redistribute this Package with Sigil due to ActiveState’s binary non-redistribution policy.

So please download and install this version of ActiveState’s Active Tcl Community Edition, until we get a chance to do our own build of Tcl from source for future releases. ActiveState is a primary contributor to and a respected and trusted source for python and tcl/tk related binaries on both Windows and Mac OS X.


Sigil-0.8.901 – Second in the Pre-Release Series is now out!

Sigil 0.8.901 is the second in the Sigil 0.9.0 pre-release series and is primarily a bug fix release. If no major showstopper bugs are found, this pre-release will form the official Sigil 0.9.0 release.

Special thanks to all who tested and reported bugs in the initial Sigil-0.8.900 release!  Thanks to your help we have been able to find and fix a large number of bugs and greatly improve the stability of the new release series of Sigil.

The latest release can be downloaded from Sigil-Ebook’s github releases here:

As always for safety – please remember to only download Sigil from its official home and to check the sha 256 checksum of your download before attempting to open it.

Bug Fixed

  • fix for hang when trying to add a cover
  • multiple fixes for segfaults in the TOC creation code
  • fixes for blank TOC headings caused by tags nested inside of h1-h6 tags
  • workaround for a major instability caused by a compiler bug in Visual Studio 2013 on Windows
  • fixes for multiple xml header declarations appearing when using sigil_bs4 prettyprint_xhtml() or serialize_xhtml()
  • build fixes to include MSVCR100.DLL for Windows machines that are too new to have it
  • fix pretty printing using gumbo to support selected mbp: tags
  • fixes to deal with self-closing iframe tags which made gumbo stumble
  • fixes to more robustly convert from QByteArray types to their char * pointers
  • fixes and improvements to the Building on Linux instructions
  • protect gumbo parsing with a mutex to prevent unknown issues with potential for non-reentrant code in that library
  • workaround Qt QHash operator()= bugs that caused static QHash objects to freed multiple times
  • fix for internal opf processing encoding detection being confused by xml header declarations potentially resulting in missing spine and manifest items.

New Features

  • new launcher/wrapper code interface to support plugins that operate on epub3 ebooks
  • added cssutils, cssselect, and chardet to the site-packages of the embedded Python 3.4 interpreter
  • validation plugins that report no errors will now have “No problems found” appear in the Sigil Validation window.
  • validation plugins will auto accept/close the plugin runner window no matter the results
  • Windows installer now detects whether MS redistributable runtimes are already installed

Note, the epub2 validator FlightCrew has been converted to a plugin for Sigil 0.8.900 (and later).  This plugin can be downloaded from the official Sigil-Ebook/flightcrew repository:

Also please make any bug reports in the appropriate thread inside of the Sigil Forum on or on our github repo’s issues page.

Sigil 0.8.900 Released (first of the pre Sigil 0.9.0 release series)

Today we are releasing Sigil-0.8.900 which really represents the first of the Sigil 0.9.0 pre releases whose eventual goal is to add epub3 support without disrupting epub2 editing.

To accomplish this, Sigil has had most of its internals torn out and rebuilt from scratch with new components including Google’s Gumbo html5 parser and the use of an embedded Python 3.4.3 interpreter with lxml to replace Xerces and Tidy which had some serious issues with potential ePub3 support. As such, we do expect users to run into corner cases we have not yet found ourselves. So please test this new release and report any irregularities you see so that we can quickly iron out any difficulties before continuing our development towards support for both ePub2 and ePub3.

In addition, due to Compiler/DLL literal hell on Windows we have been forced to mix a VS2013 built Sigil, and Qt with a VS 2010 built Python 3.4. Given that Python 3.4 is C based (not C++) and given all python memory allocation/deallocation never crosses over our Python embedded interface, this has not proven to be an issue under all of our testing. That said, once Qt 5.5.1 actually builds with VS2015 on Windows, we will move towards using a VS2015 built version of Sigil, Qt, and Python 3.5 to make sure all pieces of the Sigil app are compiled with the exact same compiler on Windows. On Linux and Mac OS X where the compiler designers actually understand the concept of backwards compatibility using versioned symbols, separation of exception handling, and etc, none of this is an issue.



– Removed Tidy and replaced it with a combination of a specially modified Gumbo
parser that supports html5

– Removed Xerces, XercesExtras, Boost, and unused bundles.

– Updated the source code to be compatible with the latest clang compiler by replacing all “undefined – behaviour” use of “Null” References with proper pointers across our entire codebase.

– Completely revamped the build process to embed the Python 3.4 Interpreter
inside of Sigil and integrate it in, including as site-packages:
[lxml, bs4, PIL, regex, six, html5lib]. This will allow plugins
that use the internal Python 3.X engine access to all of these
specialized packages by default with no additional action
needed by end users of their plugin.

– Created our own version of BeautifulSoup4-4.4.0 called sigil_bs4 that
fixes lxml namespace bugs, fixes serialization/prettyprinting of
inline xhtml tags, and modifies the bs4 codebase so that a single
source code works equally well on both Python 2.7 and Python 3.X

– Replaced internal opf and ncx xml processing and cleaning with a
combination of embedded Python 3.4, sigil_bs4 / lxml

– We now build Hunspell as a shared library and added a ctypes interface to allow
plugins to spellcheck

– We now build our modified gumbo html5 parser as a shared library
and provide a bs4 ctypes interface to it for easy xhtml processing
in plugins that use either Python 2.7 or Python 3.X

– Allowed plugins to auto-fix “text/html” media-types to “application/xhtml+xml”

– Began the transition to allow for both epub2 and epub3 editing
(Note: epub3 editing is still incomplete)

– Converted Flightcrew to become a Sigil plugin and replace it with
a simple and fast internal sanity checker.

– Updated Hunspell dictionaries to be actual dictionaries and not just word lists for en_US and en_GB

– Updated other dictionaries to their most current version to match what is used in LibreOffice 5

– Fix issue #54 modified date using local numerials when it should be
using Arabic numerals per the spec.

– Set the book to modified when font’s are obfuscated.

– Change FORCE_BUNDLED_COPIES build flag to USE_SYSTEM_LIBS.  This flips the meaning of the flag. Now USE_SYSTEM_LIBS will enable using system
libraries. Also, SYSTEM_LIBS_REQUIRED was added which will fail the
cmake configure if any system libraries are not found instead of
falling back to the bundled copy. Finally, this makes the build more
consistent for Windows and OS X users.


to get Sigil-0.8.900.

One additional note: as Gumbo is an html5 aware library, Sigil will 
now replace named and numeric entities with their actual unicode 
characters.  So you should make sure Sigil's Preserve Entities Preferences
settings includes   and any other named entities you want to 
keep as entities.

Sigil 0.8.7 Released

This is a very small maintenance release. It mainly updates links for the change in code location. This release can be found here. The sha256sum of the checksum file is ec03bb7b586a4963fb9ac1ac22ae72c76360915775c0af631ce8e2da341aa0eb.

Also, this is the last release that will have the Mac package signed by John Schember.

Leaving Sigil in the Hands of New Maintainers

As of today I’m retiring from being part of Sigil. Nothing nefarious just lack of time (mainly) and motivation. This doesn’t mean the end of Sigil. Kevin Hendricks and Doug Massay have been working on Sigil with me for months now. I’m leaving it in their very capable hands.

To accommodate this transition I’ve created a GitHub organization for Sigil’s code. Kevin and Doug will be added as maintainers very soon. This way it’s not dependent on a repository connected to my personal account. Also there will be a 0.8.7 release which updates all the links to point to the new code location.

It’s been fun, bye.
John Schember

Sigil 0.8.6 Released

This release is a maintenance release of the 0.8.x series and fixes a few critical bugs that could cause Sigil to crash. You can find binary packages here and the change log, here.

Finally, the sha256 checksum for the checksum file is 732773ec4fc73ab2ba29584130833b53d96c6c1296c433d889f2cd4b55d565be. The Mac package is signed by my signing key (John Schember) and 10.9.5 is the minimum OS X version but it was built and tested on 10.10. The Windows builds were built on Windows 7.

Edit April 14, 2015.

There was an issue with the Mac Package where it would crash instead of opening. A new build has been uploaded. The new checksum for the checksum file is b05880c62ecd63a20225e13fc3868ea5520fe5f2e498842c542b1f32d525fee1.

Sigil 0.8.5 Released

This release is a maintenance release of the 0.8.x series and fixes a few critical bugs. Currently 0.8.x is the being maintained for critical fixes while the 0.9.0 is being worked on. You can find binary packages here and the change log, here.

Finally, the sha256 checksum for the checksum file is c34fe0e4d5d7fac3347a23e0644b1e72c6250579cc1939c625911d03800e967f. The Mac package is signed by my signing key (John Schember) and 10.9.5 is the minimum OS X version but it was built and tested on 10.10. The Windows builds were built on Windows 7.