Use git diff-index to check for dirty working directory

Should be functionally equivalent to the previous code, but cleaner and
simpler

2 files changed, 3 insertions, 3 deletions

diff --git a/desktop/scripts/release/1-prepare-release b/desktop/scripts/release/1-prepare-release
index da6aed637d..b76487d5cb 100755
--- a/desktop/scripts/release/1-prepare-release
+++ b/desktop/scripts/release/1-prepare-release
@@ -37,7 +37,7 @@ function checks {
         exit 1
     fi
 
-    if [[ $(git diff --shortstat 2> /dev/null | tail -n1) != "" ]]; then
+    if ! git diff-index --quiet HEAD --; then
         log_error "Dirty working directory! Will not accept that for an official release."
         exit 1
     fi
@@ -82,7 +82,7 @@ function check_changelog {
 
 function update_copyright_year {
     $REPO_ROOT/scripts/update-copyright
-    if [[ $(git diff --shortstat 2> /dev/null | tail -n1) != "" ]]; then
+    if ! git diff-index --quiet HEAD --; then
         print_and_run git commit -a -S -m "Update copyright year in project files and code"
     fi
 }
diff --git a/scripts/localization b/scripts/localization
index 084f61661c..965ca0ff17 100755
--- a/scripts/localization
+++ b/scripts/localization
@@ -51,7 +51,7 @@ function update_relay_locations_pot {
 }
 
 function commit_changes {
-    if [[ $(git diff --shortstat 2> /dev/null | tail -n1) != "" ]]; then
+    if ! git diff-index --quiet HEAD --; then
         git commit -a -S -m "$1"
     fi
 }