Add script to format and update translations files

script/update-locales.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+
+# Format and update translations from a source file (en_US.json by default)
+#
+# Requires jq (https://stedolan.github.io/jq/) and sponge
+# (https://www.putorius.net/linux-sponge-soak-up-standard-input-and-write-to-a-file.html)
+
+set -euo pipefail
+
+SOURCE=en_US.json
+PREFIX=_TSTR_
+
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+LOCALES_DIR="${SCRIPT_DIR}/../src/musikcube/data/locales"
+TEMPFILE=$(mktemp -p ${TMPDIR:-/tmp} $(basename "${0}").XXXXX)
+
+trap cleanup 0 1 2 3 5
+
+cleanup() {
+  rm -f "${TEMPFILE}"
+}
+
+# Sort $SOURCE translations file alphabetically by keys.
+jq -S . "${LOCALES_DIR}/${SOURCE}" | sponge "${LOCALES_DIR}/${SOURCE}"
+
+# Generate a temporary translations file prefixing all values with ${PREFIX}
+# to indicate missing translations.
+awk -F'": ' -v prefix="${PREFIX}" \
+  '/: "/{sub("\"", "\"" prefix, $2);print $1 "\": " $2;next} {print}' \
+  "${LOCALES_DIR}/${SOURCE}" \
+  > "${TEMPFILE}" \
+  # awk > $TEMPFILE
+
+# Merge language specific translations fle with temporary translations file,
+# adding any missing translations from ${SOURCE}, prefixed with ${PREFIX}.
+for JSON in $(git ls-files "${LOCALES_DIR}" | grep -v "${SOURCE}"); do
+  jq -Ss '.[0] * .[1]' "${TEMPFILE}" "${JSON}" \
+    | sponge "${JSON}" \
+    # jq | sponge
+done