As reported in bug #18057, the extension unaccent removes in its rule
file whitespace characters that are intentionally specified when
building unaccent.rules from UnicodeData.txt, causing an incorrect
translation for some characters like numeric symbols. This is caused by
the fact that all whitespaces before and after the origin and target
characters are all discarded (this limitation is documented).
This commit makes possible the use of quotes around target characters,
so as whitespaces can be considered part of target characters. Some
target characters use a double quote, these require an extra double
quote.
The documentation is updated to show how to use quoted areas,
generate_unaccent_rules.py is updated to generate unaccent.rules and a
couple of tests are added for numeric symbols. While working on this
patch, I have implemented a fake rule file to test the parsing logic
implemented, which is not included here as it would just consume extra
cycles in the tests, and it requires the manipulation of an installation
tree to be able to work correctly.
As this requires a change of format in unaccent.rules, this cannot be
backpatched, unfortunately. The idea to use double quotes as escaped
characters comes from Tom Lane.
Reported-by: Martin Schlossarek
Author: Michael Paquier
Discussion: https://postgr.es/m/18057-62712cad01bd202c@postgresql.org
As noted by Thomas Munro, CLDR 36 has added SOUND RECORDING COPYRIGHT
(U+2117), and we use CLDR 41, so this can be removed from the set of
special cases.
The set of regression tests is expanded for degree signs, which are two
of the special cases, and a fancy case with U+210C in Latin-ASCII.xml
that we have discovered about when diving into what could be done for
Cyrillic characters (this last part is material for a future patch, not
tackled yet).
While on it, some of the assertions of generate_unaccent_rules.py are
expanded to report the codepoint on which a failure is found, something
useful for debugging.
Extracted from a larger patch by the same author.
Author: Przemysław Sztoch
Discussion: https://postgr.es/m/8478da0d-3b61-d24f-80b4-ce2f5e971c60@sztoch.pl
We currently have several sets of files generated from data provided
by Unicode. These all have ad hoc rules and instructions for updating
when new Unicode versions appear, and it's not done consistently.
This patch centralizes and automates the process and makes it part of
the release checklist. The Unicode and CLDR versions are specified in
Makefile.global.in. There is a new make target "update-unicode" that
downloads all the relevant files and runs the generation script.
There is also a new script for generating the table of combining
characters for ucs_wcwidth(). That table is now in a separate include
file rather than hardcoded into the middle of other code. This is
based on the script that was used for generating
d8594d123c155aeecd47fc2450f62f5100b2fbf0, but the script itself wasn't
committed at that time.
Reviewed-by: John Naylor <john.naylor@2ndquadrant.com>
Discussion: https://www.postgresql.org/message-id/flat/c8d05f42-443e-6c23-819b-05b31759a37c@2ndquadrant.com
As originally coded, the script would fail on Windows 10 and Python 3
because stdout would not be switched to UTF-8 only for Python 2. This
patch makes that apply to both versions.
Also add python 2 compatibility markers so that we know what to remove
once we drop support for that. Also use a "with" clause to ensure file
descriptor is closed promptly.
Author: Hugh Ranalli, Ramanarayana
Reviewed-by: Kyotaro Horiguchi
Discussion: https://postgr.es/m/CAKm4Xs7_61XMyOWmHs3n0mmkS0O4S0pvfWk=7cQ5P0gs177f7A@mail.gmail.com
Discussion: https://postgr.es/m/15548-cef1b3f8de190d4f@postgresql.org
This has required an update of the python script generating the rules,
as its format has changed in release 29. This release has also added
new punctuation and symbols, and a new set of rules has been generated
to include them. The way to find newest versions of Latin-ASCII gets
also more clearly documented.
Author: Hugh Ranalli, Michael Paquier
Discussion: https://postgr.es/m/15548-cef1b3f8de190d4f@postgresql.org
Improve generate_unaccent_rules.py to handle composed characters whose base
is another composed character rather than a plain letter. The net effect
of this is to add a bunch of multi-accented Vietnamese characters to
unaccent.rules.
Original complaint from Kha Nguyen, diagnosis of the script's shortcoming
by Thomas Munro.
Dang Minh Huong and Michael Paquier
Discussion: https://postgr.es/m/CALo3sF6EC8cy1F2JUz=GRf5h4LMUJTaG3qpdoiLrNbWEXL-tRg@mail.gmail.com
Add Python script for buiding unaccent.rules from Unicode data. Don't
backpatch because unaccent changes may require tsvector/index
rebuild.
Thomas Munro <thomas.munro@enterprisedb.com>
