=======================================================================
                            luaotfload-tool
=======================================================================

-----------------------------------------------------------------------
         generate and query the Luaotfload font names database
-----------------------------------------------------------------------

:Date:                  2021-05-21
:Copyright:             GPL v2.0
:Version:               3.18
:Manual section:        1
:Manual group:          text processing

SYNOPSIS
=======================================================================

**luaotfload-tool** [ -bcDfFiIlLnpqRSuvVhw ]

**luaotfload-tool** --update [ --force ] [ --quiet ] [ --verbose ]
                             [ --prefer-texmf ] [ --dry-run ]
                             [ --formats=[+|-]EXTENSIONS ]
                             [ --no-compress ] [ --no-strip ]
                             [ --local ] [ --max-fonts=N ]

**luaotfload-tool** --find=FONTNAME [ --fuzzy ] [ --info ] [ --inspect ]
                                    [ --no-reload ]

**luaotfload-tool** --flush-lookups

**luaotfload-tool** --cache=DIRECTIVE

**luaotfload-tool** --list=CRITERION[:VALUE] [ --fields=F1,F2,...,Fn ]

**luaotfload-tool** --bisect=DIRECTIVE

**luaotfload-tool** --help

**luaotfload-tool** --version

**luaotfload-tool** --show-blacklist

**luaotfload-tool** --diagnose=CHECK

**luaotfload-tool** --conf=FILE --dumpconf

DESCRIPTION
=======================================================================

luaotfload-tool accesses the font names database that is required by
the *Luaotfload* package. There are two general modes: **update** and
**query**.

+ **update**:  update the database or rebuild it entirely;
+ **query**:   resolve a font name or display close matches.

OPTIONS
=======================================================================

update mode
-----------------------------------------------------------------------
--update, -u            Update the database; indexes new fonts.
--force, -f             Force rebuilding of the database; re-indexes
                        all fonts.
--local, -L             Include font files in ``$PWD``. This option
                        will cause large parts of the database to be
                        rebuilt. Thus it is quite inefficient.
                        Additionally, if local font files are found,
                        the database is prevented from being saved
                        to disk, so the local fonts need to be parsed
                        with every invocation of ``luaotfload-tool``.
--no-reload, -n         Suppress auto-updates to the database (e.g.
                        when ``--find`` is passed an unknown name).
--no-compress, -c       Do not filter the plain text version of the
                        font index through gzip. Useful for debugging
                        if your editor is built without zlib.

--prefer-texmf, -p      Organize the file name database in a way so
                        that it prefer fonts in the *TEXMF* tree over
                        system fonts if they are installed in both.
--formats=EXTENSIONS    Extensions of the font files to index.
                        Where *EXTENSIONS* is a comma-separated list of
                        supported file extensions (otf, ttf, ttc).
                        If the list is prefixed
                        with a ``+`` sign, the given list is added to
                        the currently active one; ``-`` subtracts.
                        Default: *otf,ttf,ttc*.
                        Examples:

                        1) ``--formats=-ttc,ttf`` would skip
                           TrueType fonts and font collections;
                        2) ``--formats=otf`` would scan only OpenType
                           files;
                        3) ``--formats=+afm`` includes binary
                           Postscript files accompanied by an AFM file.

query mode
-----------------------------------------------------------------------
--find=NAME             Resolve a font name; this looks up <name> in
                        the database and prints the file name it is
                        mapped to.
                        ``--find`` also understands request syntax,
                        i.e. ``--find=file:foo.otf`` checks whether
                        ``foo.otf`` is indexed.
--fuzzy, -F             Show approximate matches to the file name if
                        the lookup was unsuccessful (requires
                        ``--find``).

--info, -i              Display basic information to a resolved font
                        file (requires ``--find``).
--inspect, -I           Display detailed information by loading the
                        font and analyzing the font table; very slow!
                        For the meaning of the returned fields see
                        the LuaTeX documentation.
                        (requires ``--find``).

--list=CRITERION        Show entries, where *CRITERION* is one of the
                        following:

                        1) the character ``*``, selecting all entries;
                        2) a field of a database entry, for instance
                           *version* or *format**, according to which
                           the output will be sorted.
                           Information in an unstripped database (see
                           the option ``--no-strip`` above) is nested:
                           Subfields of a record can be addressed using
                           the ``->`` separator, e. g.
                           ``file->location``, ``style->units_per_em``,
                           or
                           ``names->sanitized->english->prefmodifiers``.
                           NB: shell syntax requires that arguments
                           containing ``->`` be properly quoted!
                        3) an expression of the form ``field:value`` to
                           limit the output to entries whose ``field``
                           matches ``value``. The ``value`` can contain
                           ``*`` to match an arbitrary number of characters.

                        For example, in order to output file names and
                        corresponding versions, sorted by the font
                        format::

                            ./luaotfload-tool.lua --list="format" --fields="file->base,version"

                        This prints::

                            otf latinmodern-math.otf  Version 1.958
                            otf lmromancaps10-oblique.otf 2.004
                            otf lmmono8-regular.otf 2.004
                            otf lmmonoproplt10-bold.otf 2.004
                            otf lmsans10-oblique.otf  2.004
                            otf lmromanslant8-regular.otf 2.004
                            otf lmroman12-italic.otf  2.004
                            otf lmsansdemicond10-oblique.otf  2.004
                            ...

--fields=FIELDS         Comma-separated list of fields that should be
                        printed.
                        Information in an unstripped database (see the
                        option ``--no-strip`` above) is nested:
                        Subfields of a record can be addressed using
                        the ``->`` separator, e. g.
                        ``file->location``, ``style->units_per_em``,
                        or ``names->sanitized->english->subfamily``.
                        The default is plainname,version*.
                        (Only meaningful with ``--list``.)

font and lookup caches
-----------------------------------------------------------------------
--flush-lookups         Clear font name lookup cache (experimental).

--cache=DIRECTIVE       Cache control, where *DIRECTIVE* is one of the
                        following:

                        1) ``purge`` -> delete Lua files from cache;
                        2) ``erase`` -> delete Lua and Luc files from
                           cache;
                        3) ``show``  -> print stats.

debugging methods
-----------------------------------------------------------------------
--show-blacklist, -b    Show blacklisted files (not directories).
--dry-run, -D           Don’t load fonts when updating the database;
                        scan directories only.
                        (For debugging file system related issues.)
--no-strip              Do not strip redundant information after
                        building the database. Warning: this will
                        inflate the index to about two to three times
                        the normal size.
--max-fonts=N           Process at most *N* font files, including fonts
                        already indexed in the count.
--bisect=DIRECTIVE      Bisection of the font database.
                        This mode is intended as assistance in
                        debugging the Luatex engine, especially when
                        tracking memleaks or buggy fonts.

                        *DIRECTIVE* can be one of the following:

                        1) ``run`` -> Make ``luaotfload-tool`` respect
                           the bisection progress when running.
                           Combined with ``--update`` and possibly
                           ``--force`` this will only process the files
                           from the start up until the pivot and ignore
                           the rest.
                        2) ``start`` -> Start bisection: create a
                           bisection state file and initialize the low,
                           high, and pivot indices.
                        3) ``stop`` -> Terminate the current bisection
                           session by deleting the state file.
                        4) ``good`` | ``bad`` -> Mark the section
                           processed last as “good” or “bad”,
                           respectively. The next bisection step will
                           continue with the bad section.
                        5) ``status`` -> Print status information about
                           the current bisection session. Hint: Use
                           with higher verbosity settings for more
                           output.

                        A bisection session is initiated by issuing the
                        ``start`` directive. This sets the pivot to the
                        middle of the list of available font files.
                        Now run *luaotfload-tool* with the ``--update``
                        flag set as well as ``--bisect=run``: only the
                        fonts up to the pivot will be considered. If
                        that task exhibited the issue you are tracking,
                        then tell Luaotfload using ``--bisect=bad``.
                        The next step of ``--bisect=run`` will continue
                        bisection with the part of the files below the
                        pivot.
                        Likewise, issue ``--bisect=good`` in order to
                        continue with the fonts above the pivot,
                        assuming the tested part of the list did not
                        trigger the bug.

                        Once the culprit font is tracked down, ``good``
                        or ``bad`` will have no effect anymore. ``run``
                        will always end up processing the single font
                        file that was left.
                        Use ``--bisect=stop`` to clear the bisection
                        state.

miscellaneous
-----------------------------------------------------------------------
--verbose=N, -v         Set verbosity level to *n* or the number of
                        repetitions of ``-v``.
--quiet                 No verbose output (log level set to zero).
--log=CHANNEL           Redirect log output (for database
                        troubleshooting), where *CHANNEL* can be

                        1) ``stdout`` -> all output will be
                           dumped to the terminal (default); or
                        2) ``file`` -> write to a file to the temporary
                           directory (the name will be chosen
                           automatically.

--version, -V           Show version numbers of components as well as
                        some basic information and exit.
--help, -h              Show help message and exit.

--diagnose=CHECK        Run the diagnostic procedure *CHECK*. Available
                        procedures are:

                        1) ``files`` -> check *Luaotfload* files for
                           modifications;
                        2) ``permissions`` -> check permissions of
                           cache directories and files;
                        3) ``environment`` -> print relevant
                            environment and kpse variables;
                        4) ``repository`` -> check the git repository
                           for new releases,
                        5) ``index`` -> check database, display
                           information about it.

                        Procedures can be chained by concatenating with
                        commas, e.g. ``--diagnose=files,permissions``.
                        Specify ``thorough`` to run all checks.

--conf=FILE             Read the configuration from *FILE*. See
                        **luaotfload.conf**\(%) for documentation
                        concerning the format and available options.
--dumpconf              Print the currently active configuration; the
                        output can be saved to a file and used for
                        bootstrapping a custom configuration files.

--aliases               Dump the font name database as a kpathsea
                        aliases file. This option is experimental and
                        might go away.

FILES
=======================================================================

The font name database is usually located in the directory
``texmf-var/luatex-cache/generic/names/`` (``$TEXMFCACHE`` as set in
``texmf.cnf``) of your *TeX Live* distribution as a zlib-compressed
file ``luaotfload-names.lua.gz``.
The experimental lookup cache will be created as
``luaotfload-lookup-cache.lua`` in the same directory.
These Lua tables are not used directly by Luaotfload, though.
Instead, they are compiled to Lua bytecode which is written to
corresponding files with the extension ``.luc`` in the same directory.
When modifying the files by hand keep in mind that only if the bytecode
files are missing will Luaotfload use the plain version instead.
Both kinds of files are safe to delete, at the cost of regenerating
them with the next run of *LuaTeX*.

SEE ALSO
=======================================================================

**luaotfload.conf**\(5), **luatex**\(1), **lua**\(1)

* ``texdoc luaotfload`` to display the manual for the *Luaotfload*
  package
* Luaotfload development `<https://github.com/latex3/luaotfload>`_
* LuaLaTeX mailing list  `<http://tug.org/pipermail/lualatex-dev/>`_
* LuaTeX                 `<http://luatex.org/>`_
* ConTeXt                `<http://wiki.contextgarden.net>`_
* Luaotfload on CTAN     `<http://ctan.org/pkg/luaotfload>`_

BUGS
=======================================================================

Tons, probably.

AUTHORS
=======================================================================

*Luaotfload* was developed by the LuaLaTeX dev team
(`<https://github.com/lualatex/>`__). It is currently maintained by the LaTeX
Project Team at `<https://github.com/latex3/luaotfload>`__
The fontloader code is provided by Hans Hagen of Pragma ADE, Hasselt
NL (`<http://pragma-ade.com/>`__).

This manual page was written by Philipp Gesang <phg@phi-gamma.net>.

