mac build: fix locale in binaries

contrib/osx/base.sh

@@ -21,3 +21,7 @@ function DoCodeSignMaybe { # ARGS: infoName fileOrDirName codesignIdentity
     info "Code signing ${infoName}..."
     codesign -f -v $deep -s "$identity" "$file" || fail "Could not code sign ${infoName}"
 }
+
+function realpath() {
+    [[ $1 = /* ]] && echo "$1" || echo "$PWD/${1#./}"
+}

contrib/osx/make_osx

@@ -9,6 +9,10 @@ LIBSECP_VERSION="b408c6a8b287003d1ade5709e6f7bc3c7f1d5be7"
 
 . $(dirname "$0")/base.sh
 
+CONTRIB_OSX="$(dirname "$(realpath "$0")")"
+CONTRIB="$CONTRIB_OSX/.."
+ROOT_FOLDER="$CONTRIB/.."
+
 src_dir=$(dirname "$0")
 cd $src_dir/../..
 
@@ -65,13 +69,24 @@ pyinstaller --version
 
 rm -rf ./dist
 
-git submodule init
-git submodule update
+git submodule update --init
 
 rm  -rf $BUILDDIR > /dev/null 2>&1
 mkdir $BUILDDIR
 
-cp -R ./contrib/deterministic-build/electrum-locale/locale/ ./electrum/locale/
+info "generating locale"
+(
+    if ! which msgfmt > /dev/null 2>&1; then
+        brew install gettext
+        brew link --force gettext
+    fi
+    cd "$CONTRIB"/deterministic-build/electrum-locale
+    for i in ./locale/*; do
+        dir="$ROOT_FOLDER"/electrum/$i/LC_MESSAGES
+        mkdir -p $dir
+        msgfmt --output-file=$dir/electrum.mo $i/electrum.po || true
+    done
+) || fail "failed generating locale"
 
 
 info "Downloading libusb..."