about summary refs log tree commit diff
path: root/third_party/git/contrib/update-unicode/README
blob: 151a1970419fd042466932331b3ab216e40d2560 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
TL;DR: Run update_unicode.sh after the publication of a new Unicode
standard and commit the resulting unicode-widths.h file.

The long version
================

The Git source code ships the file unicode-widths.h which contains
tables of zero and double width Unicode code points, respectively.
These tables are generated using update_unicode.sh in this directory.
update_unicode.sh itself uses a third-party tool, uniset, to query two
Unicode data files for the interesting code points.

On first run, update_unicode.sh clones uniset from Github and builds it.
This requires a current-ish version of autoconf (2.69 works per December
2016).

On each run, update_unicode.sh checks whether more recent Unicode data
files are available from the Unicode consortium, and rebuilds the header
unicode-widths.h with the new data. The new header can then be
committed.