ICU-21078 Add new script.
diff --git a/tools/cldr/cldr-to-icu/install-cldr-jars.sh b/tools/cldr/cldr-to-icu/install-cldr-jars.sh
new file mode 100644
index 0000000..9c09916
--- /dev/null
+++ b/tools/cldr/cldr-to-icu/install-cldr-jars.sh
@@ -0,0 +1,113 @@
+#!/bin/bash -u
+#
+# This script will attempt to build and install the necessary CLDR JAR files
+# from a given CLDR installation root directory. The JAR files are installed
+# according to the manual instructions given in README.txt and lib/README.txt.
+#
+# The user must have installed both 'ant' and 'maven' in accordance with the
+# instructions in README.txt before attempting to run this script.
+#
+# Usage (from the directory of this script):
+#
+# ./install-cldr-jars.sh <CLDR-root-directory>
+
+# Exit with a message for fatal errors.
+function die() {
+ echo "$1"
+ echo "Exiting..."
+ exit 1
+} >&2
+
+# Runs a given command and captures output to the global log file.
+# If a command errors, the user can then view the log file.
+function run_with_logging() {
+ echo >> "${LOG_FILE}"
+ echo "Running: ${@}" >> "${LOG_FILE}"
+ echo "----------------------------------------------------------------" >> "${LOG_FILE}"
+ "${@}" >> "${LOG_FILE}" 2>&1
+ if (( $? != 0 )) ; then
+ echo "---- Previous command failed ----" >> "${LOG_FILE}"
+ echo "Error running: ${@}"
+ read -p "Show log file? " -n 1 -r
+ echo
+ if [[ "${REPLY}" =~ ^[Yy]$ ]] ; then
+ less -X "${LOG_FILE}"
+ fi
+ mv -f "${LOG_FILE}" "${ROOT_DIR}/last_log.txt"
+ echo "Log file: ${ROOT_DIR}/last_log.txt"
+ exit 1
+ fi
+ echo "---- Previous command succeeded ----" >> "${LOG_FILE}"
+}
+
+# First require that we are run from the same directory as the script.
+ROOT_DIR="$(realpath $(dirname $0))"
+if [[ "${ROOT_DIR}" != "$(realpath ${PWD})" ]] ; then
+ echo "WARNING: Shell script should be run from the project root directory"
+ echo "Current directory:"
+ echo " ${PWD}"
+ echo "Project root direcory (where this script is):"
+ echo " ${ROOT_DIR}"
+ read -p "Change to project root and continue? " -n 1 -r
+ echo
+ [[ "${REPLY}" =~ ^[Yy]$ ]] || die "Script must be run from the project root directory"
+ cd "$ROOT_DIR"
+fi
+
+# Check for some expected environmental things early.
+which ant > /dev/null || die "Cannot find Ant executable 'ant' in the current path."
+which mvn > /dev/null || die "Cannot find Maven executable 'mvn' in the current path."
+[[ -d "lib" ]] || die "Cannot find expected 'lib' directory in: $PWD"
+
+# Check there's one argument that points at a directory (or a symbolic link to a directory).
+(( $# == 1 )) && [[ -d "$1" ]] || die "Usage: ./install-cldr-jars.sh <CLDR-root-directory>"
+
+# Set up a log file (and be nice about tidying it up).
+LOG_FILE="$(tempfile)" || die "Cannot create temporary file!"
+trap "rm -f -- '${LOG_FILE}'" EXIT
+echo "---- LOG FILE ---- $(date '+%F %T') ----" >> "${LOG_FILE}"
+
+# Build the cldr.jar in the CLDR tools directory.
+CLDR_TOOLS_DIR="$1/tools/java"
+pushd "${CLDR_TOOLS_DIR}" > /dev/null || die "Cannot change directory to: ${CLDR_TOOLS_DIR}"
+
+echo "Building CLDR JAR file..."
+run_with_logging ant -f ./build.xml clean jar
+[[ -f "cldr.jar" ]] || die "Error creating cldr.jar file"
+[[ -f "libs/utilities.jar" ]] || die "Cannot find libs/utilities.jar"
+
+popd > /dev/null
+
+# Install both required CLDR jars in the lib/ directory.
+pushd "${ROOT_DIR}/lib" > /dev/null || die "Cannot change to lib directory"
+
+# The -B flag is "batch" mode and won't mess about with escape codes in the log file.
+echo "Installing CLDR JAR file..."
+run_with_logging mvn -B install:install-file \
+ -DgroupId=org.unicode.cldr \
+ -DartifactId=cldr-api \
+ -Dversion=0.1-SNAPSHOT \
+ -Dpackaging=jar \
+ -DgeneratePom=true \
+ -DlocalRepositoryPath=. \
+ -Dfile="${CLDR_TOOLS_DIR}/cldr.jar"
+
+echo "Installing CLDR utilities JAR file..."
+run_with_logging mvn -B install:install-file \
+ -DgroupId=com.ibm.icu \
+ -DartifactId=icu-utilities \
+ -Dversion=0.1-SNAPSHOT \
+ -Dpackaging=jar \
+ -DgeneratePom=true \
+ -DlocalRepositoryPath=. \
+ -Dfile="${CLDR_TOOLS_DIR}/libs/utilities.jar"
+
+popd > /dev/null
+
+# We are back in the root directory now.
+echo "Syncing local Maven repository..."
+run_with_logging mvn -B dependency:purge-local-repository -DsnapshotsOnly=true
+
+mv -f "${LOG_FILE}" "last_log.txt"
+echo "All done! (log file: last_log.txt)"
+trap - EXIT
