diff --git a/modules/git-info/functions/coalesce b/modules/git-info/functions/coalesce
new file mode 100644
index 0000000..e9e838e
--- /dev/null
+++ b/modules/git-info/functions/coalesce
@@ -0,0 +1,6 @@
+# Prints the first non-empty string in the arguments array.
+for arg in ${argv}; do
+  print -n ${arg}
+  return 0
+done
+return 1