oh-my-zsh/plugins/emoji/update_emoji.pl

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#!/usr/bin/perl -w
#
# update_emoji.pl
#
# This script generates the emoji.plugin.zsh emoji definitions from the Unicode
# character data for the emoji characters.
#
# The data file can be found at http://unicode.org/Public/emoji/latest/emoji-data.txt
# as referenced in Unicode TR51 (http://www.unicode.org/reports/tr51/index.html).
#
# This is known to work with the data file from version 1.0. It may not work with later
# versions if the format changes. In particular, this reads line comments to get the
# emoji character name and unicode version.
#
# Country names have punctuation and other non-letter characters removed from their name,
# to avoid possible complications with having to escape the strings when using them as
# array subscripts. The definition file seems to use some combining characters like accents
# that get stripped during this process.
use strict;
use warnings;
use 5.010;
use autodie;
use Path::Class;
use File::Copy;
# Parse definitions out of the data file and convert
sub process_emoji_data_file {
my ( $infile, $outfilename ) = @_;
my $file = file($infile);
my $outfile = file($outfilename);
my $outfilebase = $outfile->basename();
my $tempfilename = "$outfilename.tmp";
my $tempfile = file($tempfilename);
my $outfh = $tempfile->openw();
$outfh->print("
# $outfilebase - Emoji character definitions for oh-my-zsh emoji plugin
#
# This file is auto-generated by update_emoji.pl. Do not edit it manually.
#
# This contains the definition for:
# \$emoji - which maps character names to Unicode characters
# \$emoji_flags - maps country names to Unicode flag characters using region indicators
# Main emoji
typeset -gAH emoji
# National flags
typeset -gAH emoji_flags
# Combining modifiers
typeset -gAH emoji_mod
");
my $fh = $file->openr();
my $line_num = 0;
while ( my $line = $fh->getline() ) {
$line_num++;
$_ = $line;
# Skip all-comment lines (from the header) and blank lines
# (But don't strip comments on normal lines; we need to parse those for
# the emoji names.)
next if /^\s*#/ or /^\s*$/;
if (/^(\S.*?\S)\s*;\s*(\w+)\s*;\s*(\w+)\s*;\s*(\w+)\s*;\s*(\w.*?)\s*#\s*V(\S+)\s\(.*?\)\s*(\w.*\S)\s*$/) {
my ($code, $style, $level, $modifier_status, $sources, $version, $keycap_name)
= ($1, $2, $3, $4, $5, $6, $7);
#print "code=$code style=$style level=$level modifier_status=$modifier_status sources=$sources version=$version name=$keycap_name\n";
my @code_points = split /\s+/, $code;
my @sources = split /\s+/, $sources;
my $flag_country = "";
if ( $keycap_name =~ /^flag for (\S.*?)\s*$/) {
$flag_country = $1;
}
my $zsh_code = join '', map { "\\U$_" } @code_points;
# Convert keycap names to valid associative array names that do not require any
# quoting. Works fine for most stuff, but is clumsy for flags.
my $omz_name = lc($keycap_name);
$omz_name =~ s/[^A-Za-z0-9]/_/g;
my $zsh_flag_country = $flag_country;
$zsh_flag_country =~ s/[^\p{Letter}]/_/g;
if ($flag_country) {
$outfh->print("emoji_flags[$zsh_flag_country]=\$'$zsh_code'\n");
} else {
$outfh->print("emoji[$omz_name]=\$'$zsh_code'\n");
}
# Modifiers are included in both the main set and their separate map,
# because they have a standalone representation as a color swatch.
if ( $modifier_status eq "modifier" ) {
$outfh->print("emoji_mod[$omz_name]=\$'$zsh_code'\n");
}
} else {
die "Failed parsing line $line_num: '$_'";
}
}
$fh->close();
$outfh->print("\n");
$outfh->close();
move($tempfilename, $outfilename)
or die "Failed moving temp file to $outfilename: $!";
}
my $datafile = "emoji-data.txt";
my $zsh_def_file = "emoji-char-definitions.zsh";
process_emoji_data_file($datafile, $zsh_def_file);
print "Updated definition file $zsh_def_file\n";