From d008551a839dd64e80420393523a4738e5ca68b1 Mon Sep 17 00:00:00 2001
From: Matthieu Moy <Matthieu.Moy@imag.fr>
Date: Tue, 8 Apr 2014 12:41:40 +0200
Subject: [PATCH] Fall back to latexdiff --flatten if latexpand is not found

---
 git-latexdiff | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/git-latexdiff b/git-latexdiff
index 286320b..eebad2f 100755
--- a/git-latexdiff
+++ b/git-latexdiff
@@ -331,6 +331,15 @@ case "$view" in
 	;;
 esac
 
+if test $flatten = 1 &&
+    ! command -v latexpand 2>/dev/null; then
+    echo "Warning: latexpand not found. Falling back to latexdiff --flatten."
+    latexdiff_flatten=1
+    flatten=0
+fi
+
+## end option parsing ##
+
 check_knitr () {
     if test -z "$prepare_cmd"; then
 	prepare_cmd="Rscript -e \"library(knitr); knit('$main')\""
@@ -438,8 +447,6 @@ mainbase=$(basename "$main" .tex)
 maindir=$(dirname "$main")
 
 # Option to use latexdiff --flatten instead of latexpand
-# Todo: Ideally dependend on whether latexpand is present or not
-# Todo: Include warning if --bbl or other latexpand commands are used.
 if test "$latexdiff_flatten" = 1; then
     latexdiffopt+=("--flatten")
 fi