Update tzdata and ICU data on OS X to fix problems with outdated DST information (needs reboot)

os-x-update-tzdata.sh

#!/bin/bash
# author: Tomás Girardi
# Based on http://helw.net/2011/04/28/updating-osx-for-egypts-dst-changes/ by Ahmed El-Helw

# Actualizado por Manuel Cano
# Cambios: url de tzdata (URLTZDATASRC), url de icu4c (y soporte al cambio de respuesta de S3, y a las posibles release (hasta 4))
#
# Probado con exito en mi Macbook Pro con Yosemite en junio de 2020

# CHANGE THIS:  SOLO SI ES NECESARIO
# go to https://www.iana.org/time-zones and get the URL for the last DATA
# release
URLTZDATASRC=https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz


# BACKUP your current icu file first
cp /usr/share/icu/*.dat ~

ICUVERSION=`ls /usr/share/icu/*.dat | grep -o "\(\d\d\)l\.dat" | grep -o "^\d\d"`
URLICUSRC="https://github.com/unicode-org/icu/releases/download/release-${ICUVERSION}-NNN/icu4c-${ICUVERSION}_NNN-src.tgz"
# NNN es subversion, usar la misma sintaxis si se cambia la URL
# antigua url "http://download.icu-project.org/files/icu4c/${ICUVERSION}.1/icu4c-${ICUVERSION}_1-src.zip"

### update tzdata
cd /tmp
mkdir tzdata
cd tzdata
wget "${URLTZDATASRC}"
tar -xzf tzdata-latest.tar.gz
sudo zic africa
sudo zic antarctica
sudo zic asia
sudo zic australasia
sudo zic backward
sudo zic etcetera
sudo zic europe
sudo zic factory
sudo zic northamerica
sudo zic pacificnew
sudo zic southamerica
sudo zic systemv

### update ICU data
cd /tmp
mkdir icu4c
cd icu4c

#wget "${URLICUSRC}" -O icusrc.tar.gz
URL="${URLICUSRC//NNN/1}"
echo "intentando descargar $URL"
if wget -S --spider $URL 2>&1 | grep -q '302 Found'; then
    wget "${URL}" -O icusrc.tar.gz
else
    URL="${URLICUSRC//NNN/2}"
    echo "intentando descargar $URL"
    if wget -S --spider $URL 2>&1 | grep -q '302 Found'; then
        wget "${URL}" -O icusrc.tar.gz
    else
        URL="${URLICUSRC//NNN/3}"
        echo "intentando descargar $URL"
        if wget -S --spider $URL 2>&1 | grep -q '302 Found'; then
            wget "${URL}" -O icusrc.tar.gz
        else
            URL="${URLICUSRC//NNN/4}"
            echo "intentando descargar $URL"
            if wget -S --spider $URL 2>&1 | grep -q '302 Found'; then
               wget "${URL}" -O icusrc.tar.gz
            else
               echo 'Url $URL no existe!'
               return
        fi
        fi
    fi
fi

tar xzf icusrc.tar.gz
cd icu/source/tools/tzcode
# ./icuSources/tools/tzcode/readme.txt tells us that placing a tzdata
# file in the tzcode directory will compile with that zoneinfo database

# download latest tzdata
wget "${URLTZDATASRC}"
cd ../..

# compile
./runConfigureICU MacOSX --with-data-packaging=archive
gnumake

# replace the data file only
sudo install -o root -g wheel -m 0644 -Sp "data/out/icudt${ICUVERSION}l.dat" "/usr/share/icu/icudt${ICUVERSION}l.dat"

# NOW REBOOT!!!

Probado con éxito en mi Macbook Pro con Yosemite en junio de 2020