snapshot of https://github.com/zulip/zulip.git @ 48c69911c7dd4e03b20552eb3bd77ad8151c1357 (2026-09-15)

tools/lib/git-tools.bash

@@ -0,0 +1,34 @@
+# shellcheck shell=bash
+
+# Borrowed from Git's git-sh-setup.
+#
+# See git.git commit 92c62a3f4 (from 2010!); as of 2020 with Git 2.26,
+# this function has only needed one edit since then, adding localization
+# with gettext, which we can omit.
+require_clean_work_tree() {
+    local action="$1"
+
+    git rev-parse --verify HEAD >/dev/null || exit 1
+    git update-index -q --ignore-submodules --refresh
+    local err=0
+
+    if ! git diff-files --quiet --ignore-submodules; then
+        echo >&2 "Cannot $action: You have unstaged changes."
+        err=1
+    fi
+
+    if ! git diff-index --cached --quiet --ignore-submodules HEAD --; then
+        if [ $err = 0 ]; then
+            echo >&2 "Cannot $action: Your index contains uncommitted changes."
+        else
+            echo >&2 "Additionally, your index contains uncommitted changes."
+        fi
+        err=1
+    fi
+
+    if [ $err = 1 ]; then
+        git status --short
+        echo >&2 "Doing nothing to avoid losing your work."
+        exit 1
+    fi
+}