b75f9f508b
mu's query parser is the piece of software that turns your queries
into something the Xapian database can understand. So, if you query
"maildir:/inbox and subject:bla" this must be translated into a
Xapian::Query object which will retrieve the sought after messages.
Since mu's beginning, almost a decade ago, this parser was based on
Xapian's default Xapian::QueryParser. It works okay, but wasn't really
designed for the mu use-case, and had a bit of trouble with anything
that's not A..Z (think: spaces, special characters, unicode etc.).
Over the years, mu added quite a bit of pre-processing trickery to
deal with that. Still, there were corner cases and bugs that were
practically unfixable.
The solution to all of this is to have a custom query processor that
replaces Xapian's, and write it from the ground up to deal with the
special characters etc. I wrote one, as part of my "future, post-1.0
mu" reseach project, and I have now backported it to the mu 0.9.19.
From a technical perspective, this is a major cleanup, and allows us
to get rid of much of the fragile preprocessing both for indexing and
querying. From and end-user perspective this (hopefully) means that
many of the little parsing issues are gone, and it opens the way for
some new features.
From an end-user perspective:
- better support for special characters.
- regexp search! yes, you can now search for regular expressions, e.g.
subject:/h.ll?o/
will find subjects with hallo, hello, halo, philosophy, ...
As you can imagine, this can be a _heavy_ operation on the database,
and might take quite a bit longer than a normal query; but it can be
quite useful.
88 lines
1.9 KiB
Makefile
88 lines
1.9 KiB
Makefile
## Copyright (C) 2017 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
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##
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## This program is free software; you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation; either version 3 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program; if not, write to the Free Software Foundation,
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## Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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include $(top_srcdir)/gtest.mk
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@VALGRIND_CHECK_RULES@
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noinst_PROGRAMS= \
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tokenize \
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parse
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tokenize_SOURCES= \
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tokenize.cc
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tokenize_LDADD= \
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$(GCOV_LDADD) \
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libmuxparser.la
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parse_SOURCES= \
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parse.cc
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parse_LDADD= \
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$(GCOV_LDADD) \
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libmuxparser.la
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AM_CXXFLAGS= \
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-I$(srcdir)/.. \
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-I$(top_srcdir)/lib \
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$(GLIB_CFLAGS) \
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$(XAPIAN_CXXFLAGS) \
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$(WARN_CXXFLAGS) \
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$(GCOV_CFLAGS) \
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-Wno-inline \
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-Wno-switch-enum
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libmuxparser_la_LIBADD= \
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$(WARN_LDFLAGS) \
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$(GLIB_LIBS) \
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$(XAPIAN_LIBS) \
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$(GCOV_LDADD)
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noinst_LTLIBRARIES= \
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libmuxparser.la
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libmuxparser_la_SOURCES= \
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data.hh \
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parser.cc \
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parser.hh \
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proc-iface.hh \
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tokenizer.cc \
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tokenizer.hh \
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tree.hh \
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utils.cc \
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utils.hh \
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xapian.cc \
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xapian.hh
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VALGRIND_SUPPRESSIONS_FILES= ${top_srcdir}/mux.supp
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noinst_PROGRAMS+=$(TEST_PROGS)
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TEST_PROGS += test-tokenizer
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test_tokenizer_SOURCES=test-tokenizer.cc
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test_tokenizer_LDADD=libmuxparser.la
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TEST_PROGS += test-parser
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test_parser_SOURCES=test-parser.cc
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test_parser_LDADD=libmuxparser.la
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TEST_PROGS += test-utils
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test_utils_SOURCES=test-utils.cc
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test_utils_LDADD=libmuxparser.la
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TESTS=$(TEST_PROGS)
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