From 2efdc6f1d99e8b97963a7aa63df0e96a091825d3 Mon Sep 17 00:00:00 2001
From: Hugo Villeneuve <hugo@hugovil.com>
Date: Fri, 6 Oct 2023 23:13:13 -0400
Subject: [PATCH] Add dry-run option

---
 fgen.sh | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/fgen.sh b/fgen.sh
index b6a45c2..1e92b1e 100755
--- a/fgen.sh
+++ b/fgen.sh
@@ -17,6 +17,8 @@ fps=8
 
 debug=0
 trames=1
+dry_run=0
+
 SED=sed
 FFMPEG_OPTS="-hide_banner -loglevel error -y"
 
@@ -85,11 +87,12 @@ print_usage()
     echo "Options:"
     echo "  -d   affiche les informations de debug"
     echo "  -f   ne regénère pas les trames, mais uniquement la séquence vidéo"
+    echo "  -n   mode de test (dry-run)"
     echo "  -r   nombre de trames par seconde (FPS)"
     echo "  -h   affiche ce message d'aide"
 }
 
-while getopts "dhfr:" flag ;do
+while getopts "dhfnr:" flag ;do
     case ${flag} in
         d)
             debug="1"
@@ -97,6 +100,9 @@ while getopts "dhfr:" flag ;do
         f)
             trames=0
             ;;
+        n)
+            dry_run=1
+            ;;
         r)
             fps="${OPTARG}"
             ;;
@@ -190,8 +196,10 @@ if [ ${trames} -eq 1 ]; then
         if [ x"${ng}" != x"" ]; then
             if which ffmpeg 1> /dev/null 2>&1; then
                 if [ -f ${dest}/${group}-f1.png ]; then
-                    # Conversion vidéo:
-                    ffmpeg ${FFMPEG_OPTS} -r ${fps} -start_number 1 -i ${dest}/${group}-f%d.png ${dest}/${group}.mp4
+                    if [ ${dry_run} -eq 0 ]; then
+                        # Conversion vidéo:
+                        ffmpeg ${FFMPEG_OPTS} -r ${fps} -start_number 1 -i ${dest}/${group}-f%d.png ${dest}/${group}.mp4
+                    fi
                 fi
             fi
 
@@ -227,7 +235,15 @@ if [ ${trames} -eq 1 ]; then
             fi
 
             log_dbg "New frame ID: ${nf}"
-            convert -colorspace sRGB -page +0+0 ${dest}/background.png ${files} -background none -layers merge ${dest}/${group}-f${nf}.png
+
+            if [ ${dry_run} -eq 1 ]; then
+                touch ${dest}/${group}-f${nf}.png
+            else
+                convert -colorspace sRGB -page +0+0 ${dest}/background.png \
+                        ${files} -background none -layers merge \
+                        ${dest}/${group}-f${nf}.png
+            fi
+
             files=""
             oldnf="${nf}"
         fi
-- 
2.20.1