#!/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>
#   update-icu4x.sh https://github.com/unicode-org/icu4x.git icu@0.3.0
#
# Update to the main branch:
#   Usage: update-icu4x.sh <URL of ICU GIT> <branch>
#   update-icu4x.sh https://github.com/unicode-org/icu4x.git main

if [ $# -lt 2 ]; then
  echo "Usage: update-icu4x.sh <URL of ICU4X GIT> <release tag name> <CLDR version>"
  echo "Example: update-icu4x.sh https://github.com/unicode-org/icu4x.git icu@0.3.0 39.0.0"
  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 "$0")/.." >/dev/null 2>&1 ; pwd -P)
data_dir=${top_src_dir}/config/external/icu4x
data_file=${data_dir}/icu4x.postcard
git_info_file=${data_dir}/ICU4X-GIT-INFO

log "Remove the old data"
rm -f ${data_file}

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 "Run the icu4x-datagen tool to regenerate the data."
log "Saving the data to: ${data_file}"

# TODO(Bug 1741262) - Should locales be filtered as well? It doesn't appear that the existing ICU
# data builder is using any locale filtering.

# TODO(Bug 1741264) - Keys are not supported yet: https://github.com/unicode-org/icu4x/issues/192
# --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 -- \
  --cldr-tag $3                  \
  --all-keys                     \
  --all-locales                  \
  --format blob                  \
  --out ${data_file}             \
  -v                             \

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}