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+#!/bin/sh
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+set -e
+
+# Update the icu4x binary data for a given release:
+# Usage: update-icu4x.sh <URL of ICU GIT> <release tag name> <CLDR version> <ICU release tag name> <ICU4X version of icu_capi>
+# update-icu4x.sh https://github.com/unicode-org/icu4x.git icu@1.4.0 44.0.0 release-74-1 1.4.0
+#
+# Update to the main branch:
+# Usage: update-icu4x.sh <URL of ICU GIT> <branch> <CLDR version> <ICU release tag name> <ICU4X version of icu_capi>
+# update-icu4x.sh https://github.com/unicode-org/icu4x.git main 44.0.0 release-74-1 1.4.0
+
+# default
+cldr=${3:-44.0.0}
+icuexport=${4:-release-74-1}
+icu4x_version=${5:-1.4.0}
+
+if [ $# -lt 2 ]; then
+ echo "Usage: update-icu4x.sh <URL of ICU4X GIT> <ICU4X release tag name> <CLDR version> <ICU release tag name> <ICU4X version for icu_capi>"
+ echo "Example: update-icu4x.sh https://github.com/unicode-org/icu4x.git icu@1.4.0 44.0.0 release-74-1 1.4.0"
+ exit 1
+fi
+
+# Make a log function so the output is easy to read.
+log() {
+ CYAN='\033[0;36m'
+ CLEAR='\033[0m'
+ printf "${CYAN}[update-icu4x]${CLEAR} $*\n"
+}
+
+# Specify locale and time zone information for consistent output and reproduceability.
+export TZ=UTC
+export LANG=en_US.UTF-8
+export LANGUAGE=en_US
+export LC_ALL=en_US.UTF-8
+
+# Define all of the paths.
+original_pwd=$(pwd)
+top_src_dir=$(cd -- "$(dirname "$0")/.." >/dev/null 2>&1 ; pwd -P)
+segmenter_data_dir=${top_src_dir}/intl/icu_segmenter_data/data
+git_info_file=${segmenter_data_dir}/ICU4X-GIT-INFO
+
+log "Remove the old data"
+rm -rf ${segmenter_data_dir}
+
+log "Download icuexportdata"
+tmpicuexportdir=$(mktemp -d)
+icuexport_filename=`echo "icuexportdata_${icuexport}.zip" | sed "s/\//-/g"`
+cd ${tmpicuexportdir}
+wget https://github.com/unicode-org/icu/releases/download/${icuexport}/${icuexport_filename}
+
+log "Patching icuexportdata to reduce data size"
+unzip ${icuexport_filename}
+for toml in \
+ burmesedict.toml \
+ khmerdict.toml \
+ laodict.toml \
+ thaidict.toml \
+; do
+ cp ${top_src_dir}/intl/icu4x-patches/empty.toml ${tmpicuexportdir}/segmenter/dictionary/$toml
+done
+
+log "Clone ICU4X"
+tmpclonedir=$(mktemp -d)
+git clone --depth 1 --branch $2 $1 ${tmpclonedir}
+
+log "Change the directory to the cloned repo"
+log ${tmpclonedir}
+cd ${tmpclonedir}
+
+log "Copy icu_capi crate to local since we need a patched version"
+rm -rf ${top_src_dir}/intl/icu_capi
+wget -O icu_capi.tar.gz https://crates.io/api/v1/crates/icu_capi/${icu4x_version}/download
+tar xf icu_capi.tar.gz -C ${top_src_dir}/intl
+mv ${top_src_dir}/intl/icu_capi-${icu4x_version} ${top_src_dir}/intl/icu_capi
+rm -rf icu_capi_tar.gz
+
+log "Patching icu_capi"
+for patch in \
+ 001-Cargo.toml.patch \
+ 002-GH4109.patch \
+ 003-explicit.patch \
+ 004-dead-code.patch \
+; do
+ patch -d ${top_src_dir} -p1 --no-backup-if-mismatch < ${top_src_dir}/intl/icu4x-patches/$patch
+done
+
+# ICU4X 1.3 or later with icu_capi uses each compiled_data crate.
+
+log "Run the icu4x-datagen tool to regenerate the segmenter data."
+log "Saving the data into: ${segmenter_data_dir}"
+
+# TODO(Bug 1741262) - Should locales be filtered as well? It doesn't appear that the existing ICU
+# data builder is using any locale filtering.
+
+# --keys <KEYS>...
+# Include this resource key in the output. Accepts multiple arguments.
+# --key-file <KEY_FILE>
+# Path to text file with resource keys to include, one per line. Empty lines and
+# lines starting with '#' are ignored.
+cargo run --bin icu4x-datagen \
+ --features=bin \
+ -- \
+ --cldr-tag ${cldr} \
+ --icuexport-root ${tmpicuexportdir} \
+ --keys segmenter/dictionary/w_auto@1 \
+ --keys segmenter/dictionary/wl_ext@1 \
+ --keys segmenter/grapheme@1 \
+ --keys segmenter/line@1 \
+ --keys segmenter/lstm/wl_auto@1 \
+ --keys segmenter/sentence@1 \
+ --keys segmenter/word@1 \
+ --all-locales \
+ --format mod \
+ --out ${segmenter_data_dir} \
+
+log "Record the current cloned git information to:"
+log ${git_info_file}
+# (This ensures that if ICU modifications are performed properly, it's always
+# possible to run the command at the top of this script and make no changes to
+# the tree.)
+git -C ${tmpclonedir} log -1 > ${git_info_file}
+
+log "Clean up the tmp directory"
+cd ${original_pwd}
+rm -rf ${tmpclonedir}
+rm -rf ${tmpicuexportdir}