trying to automatise image conversion

Jenkinsfile

@@ -17,6 +17,56 @@ pipeline {
                 '''
             }
         }
+        stage('Convert images')
+        {
+            agent {
+                docker {
+                    image 'dpokidov/imagemagick'
+                    reuseNode true
+                }
+            }
+            steps {
+                sh '''
+                    set -eu
+
+                    found_edition=0
+
+                    for edition_dir in editions/*; do
+                        [ -d "$edition_dir" ] || continue
+                        found_edition=1
+
+                        set -- "$edition_dir"/splash-source.*
+                        if [ ! -e "$1" ]; then
+                            echo "ERROR: missing splash-source.* in $edition_dir" >&2
+                            exit 1
+                        fi
+                        if [ $# -ne 1 ]; then
+                            echo "ERROR: multiple splash-source.* files in $edition_dir" >&2
+                            exit 1
+                        fi
+
+                        src="$1"
+                        out="$edition_dir/splash.jpg"
+
+                        echo "Converting $src -> $out"
+
+                        magick "$src" \
+                            -resize 640x480! \
+                            -background black \
+                            -alpha remove -alpha off \
+                            -colorspace sRGB \
+                            -strip \
+                            -quality 95 \
+                            "$out"
+                    done
+
+                    if [ "$found_edition" -eq 0 ]; then
+                        echo "ERROR: no edition directory found under editions/" >&2
+                        exit 1
+                    fi
+                '''
+            }
+        }
         stage('Create live')
         {
             agent {
@@ -102,7 +152,6 @@ pipeline {
                                 chmod +x config/chroot_local-includes/usr/local/bin/neofetch
                                 cp /root/editions/voodoo2/splash.jpg config/binary_syslinux/
                             '''
-
                         }
                     }
                 }
@@ -120,7 +169,6 @@ pipeline {
                     steps {
                         dir('root/live')
                         {
-
                             sh 'lh_build'
                         }
                     }