diff --git a/01-rename.sh b/01-rename.sh
deleted file mode 100755
index 625db2a..0000000
--- a/01-rename.sh
+++ /dev/null
@@ -1,41 +0,0 @@
-#!/bin/bash
-
-##
-# Main Program
-
-dir=$(dirname "$(readlink -f "$0")")
-origdir="$dir/orig"
-indir="$dir/in"
-
-if ! cd "$dir" ; then
-    echo "ERROR: Could not change to directory \"$dir\"; aborted." >&2
-    exit 1
-elif ! test -d "$origdir" ; then
-    echo "ERROR: Directory \"$origdir\" not found; aborted." >&2
-    exit 1
-elif ! mkdir -p "$indir" ; then
-    echo "ERROR: Could not create directory \"$indir\"; aborted." >&2
-    exit 1
-elif !  rm -f -- "$indir/"*.jpg ; then
-    echo "ERROR: Could not remove files in \"$indir\"; aborted." >&2
-    exit 1
-else
-    i=1
-    rv=0
-
-    while read -r jpg ; do
-        renamed=$(printf "%02d" "$i").jpg
-
-        if cp "$jpg" "$indir/$renamed" ; then
-            echo "INFO: Copied \"$jpg\" to \"$renamed\"." >&2
-        else
-            echo "WARNING: Could not copy \"$jpg\" to \"$renamed\"." >&2
-            rv=1
-        fi
-
-        i=$((i+1))
-    done < <(ls --reverse --sort time -- "$origdir/"*.jpg)
-
-    exit "$rv"
-fi
-
diff --git a/02-convert.sh b/02-convert.sh
deleted file mode 100755
index a4506ed..0000000
--- a/02-convert.sh
+++ /dev/null
@@ -1,193 +0,0 @@
-#!/bin/bash
-
-##
-# Configuration
-
-# Before morphology analysis, reduce image dimensions by this factor
-simplify=2
-
-# Morphology to apply to reduce content to main area
-morphology="Open:6"
-morphology_shape="Disk"
-
-# Number of colors images are quantized to for component detection
-colors=4
-
-# Neighbors to evaluate when detecting connected components
-connected_components=8
-
-# Area treshold for connected components detection
-area_treshold=1000
-
-# Sigmoidal contrast adjustment used when trimming
-sigmoidal_contrast_trim="30,30%"
-
-# Sigmoidal contrast adjustment visible in result images
-sigmoidal_contrast="45,50%"
-
-# Number of colors result images are quantized to
-posterize=6
-
-# Keep intermediate images after processing (note that they will be removed in
-# any case at the next run of this script)
-keep_tmpfiles=true
-
-##
-# Main Program
-
-dir="$(dirname "$(readlink -f "$0")")"
-tmpdir="$dir/tmp"
-indir="$dir/in"
-comdir="$dir/com"
-outdir="$dir/out"
-resize_percent=$((100/simplify))
-
-if ! cd "$dir" ; then
-    echo "ERROR: Could not change to directory \"$dir\"; aborted." >&2
-    exit 1
-elif ! mkdir -p "$comdir" "$outdir" "$tmpdir" ; then
-    echo "ERROR: Could not create working directories; aborted." >&2
-    exit 1
-elif ! rm -f -- "$comdir/"*.* ; then
-    echo "ERROR: Could not delete existing component files; aborted." >&2
-    exit 1
-elif ! rm -f -- "$tmpdir/"*.* ; then
-    echo "ERROR: Could not delete existing tempfiles; aborted." >&2
-    exit 1
-elif ! rm -f -- "$outdir/"*.* ; then
-    echo "ERROR: Could not delete existing results; aborted." >&2
-    exit 1
-else
-    rv=0
-
-    for jpg in "$indir/"*.jpg ; do
-        base=$(basename "$jpg" .jpg)
-        tmp1="$tmpdir/$base.tmp1.png"
-        tmp2="$tmpdir/$base.tmp2.png"
-        com="$tmpdir/$base.com.png"
-        trimmed="$tmpdir/$base.trimmed.png"
-        inf="$tmpdir/$base.txt"
-        out="$outdir/$base.png"
-
-        if ! convert \
-            "$jpg" \
-            -colorspace RGB \
-            -sigmoidal-contrast "$sigmoidal_contrast_trim" \
-            -resize "$resize_percent%" \
-            -colors "$colors" \
-            -morphology "$morphology" "$morphology_shape" \
-            "$tmp1"
-        then
-            echo "ERROR: Could not create test image \"$tmp1\"; skipped." >&2
-            rv=1
-            continue
-        fi
-
-        draw=()
-        v=255
-
-        while read -r primitive ; do
-            draw+=("-fill" "rgb($v,$v,$v)" "-draw" "$primitive")
-            v=$((v-2))
-        done < <(
-            convert \
-                "$tmp1" \
-                -define connected-components:verbose=true \
-                -define connected-components:exclude-header=true \
-                -define connected-components:sort-order=increasing \
-                -define connected-components:mean-color=true \
-                -define connected-components:area-threshold="$area_treshold" \
-                -virtual-pixel None \
-                -connected-components "$connected_components" \
-                -auto-level \
-                "$com" | \
-            perl -e '
-                while(<>){
-                    chomp;
-                    next unless /(\d+)x(\d+)\+(\d+)\+(\d+)/;
-                    printf
-                        STDERR
-                        "DEBUG: component: $_\n";
-                    printf
-                        "rectangle %d,%d,%d,%d\n",
-                        $1, $2, $1+$3, $2+$4;
-                }
-
-            ' | \
-            sort | \
-            uniq
-        )
-
-        printf "DEBUG: connected components in \"%s\":" "$tmp1"
-        for d in "${draw[@]}" ; do
-            printf " \"%s\"" "$d"
-        done
-        printf "\n"
-
-        if ! convert \
-            "$tmp1" \
-            -fill black -colorize 100 \
-            "${draw[@]}" \
-            "$tmp2"
-        then
-            echo "ERROR: Could not convert \"$tmp1\" to \"$tmp2\"; skipped." >&2
-            rv=1
-            continue
-        elif ! convert \
-            "$tmp2" \
-            -trim info: \
-            > "$inf"
-        then
-            echo "ERROR: Could not determine trim info from \"$tmp2\"; skipped." >&2
-            rv=1
-            continue
-        fi
-
-        if "$keep_tmpfiles" ; then
-            if ! convert \
-                "$tmp2" \
-                -trim \
-                "$trimmed"
-            then
-                echo "ERROR: Could not test trim \"$tmp2\"; skipped." >&2
-                rv=1
-                continue
-            fi
-        fi
-
-        # upscale crop area from smaller temporary picture sizes
-        crop=$(simplify=$simplify perl -MEnv -e '
-            while(<>) {
-                chomp();
-                s/(\d+)/$1*${simplify}/eg;
-                /(\d+)x(\d+) \d+x\d+\+(\d+)\+(\d+)/ && do {
-                    print $1."x".$2."+".$3."+".$4;
-                }
-            }
-        ' < "$inf")
-
-        if ! "$keep_tmpfiles" ; then
-            if ! rm -f -- "$tmp1" "$tmp2" "$trimmed" "$inf" ; then
-                echo "WARNING: Could not remove temporary files in \"$dir/tmp\"." >&2
-                rv=1
-            fi
-        fi
-
-        echo "Processing $base: crop=$crop ..."
-
-        if ! convert \
-            "$jpg" \
-            -crop "$crop" \
-            -sigmoidal-contrast "$sigmoidal_contrast" \
-            +dither -posterize "$posterize" \
-            "$out"
-        then
-            echo "ERROR: Could not process \"$jpg\"; skipped." >&2
-            rv=1
-            continue
-        fi
-    done
-
-    exit "$rv"
-fi
-
diff --git a/03-pdf.sh b/03-pdf.sh
deleted file mode 100755
index 057a37f..0000000
--- a/03-pdf.sh
+++ /dev/null
@@ -1,98 +0,0 @@
-#!/bin/bash
-# shellcheck disable=SC2046
-
-##
-# Configuration
-
-# Paper size of all pages
-paper="a4paper"
-
-# Offset in page where image should be placed
-offset="1cm 3cm"
-
-# Factor to scale image by before placing in page
-scale=0.75
-
-# Filename of complete result PDF
-result="pdf/result.pdf"
-
-##
-# Main Program
-
-dir="$(dirname "$(readlink -f "$0")")"
-
-if ! cd "$dir" ; then
-    echo "ERROR: Could not change to directory \"$dir\"; aborted." >&2
-    exit 1
-elif ! mkdir -p pdf tmp ; then
-    echo "ERROR: Could not create \"$dir/{pdf,tmp}\"; aborted." >&2
-    exit 1
-elif ! rm -f -- "pdf/"*.* ; then
-    echo "ERROR: Could not delete existing results in \"$dir/pdf\"; aborted." >&2
-    exit 1
-else
-    rv=0
-
-    for png in "out/"*.png ; do
-        echo "INFO: Processing \"$png\" ..." >&2
-
-        read -r width height < <(
-            identify -verbose "$png" | \
-            perl -ne '/Geometry: (\d+)x(\d+)/ && print "$1 $2"'
-        )
-
-        if [[ -z $width ]] || [[ -z $height ]] ; then
-            echo "ERROR: Could not identify width or height of \"$png\"; skipped." >&2
-            rv=1
-            continue
-        elif [[ $width -gt $height ]] ; then
-            backdrop=template/a4paper/landscape.pdf
-            jam_landscape=--landscape
-        else
-            backdrop=template/a4paper/portrait.pdf
-            jam_landscape=--no-landscape
-        fi
-
-        base=$(basename "$png" .png)
-        pdf=tmp/$base.pdf
-        jammed=tmp/$base-pdfjam.pdf
-        backdropped=tmp/$base.backdropped.pdf
-
-        if ! convert "$png" "$pdf" ; then
-            echo "ERROR: Could not convert \"$png\" to PDF; skipped." >&2
-            rv=1
-            continue
-        elif !  pdfjam \
-            --quiet \
-            --outfile tmp \
-            --paper "$paper" \
-            "$jam_landscape" \
-            --scale "$scale" \
-            --offset "$offset" \
-            "$pdf"
-        then
-            echo "ERROR: Could not align \"$pdf\"; skipped." >&2
-            rv=1
-            continue
-        elif ! pdftk \
-            "$jammed" \
-            stamp "$backdrop" \
-            output "$backdropped"
-        then
-            echo "ERROR: Could not watermark \"$pdf\"; skipped." >&2
-            rv=1
-            continue
-        fi
-    done
-
-    if ! pdftk $(ls -- "tmp/"*.backdropped.pdf) cat output "$result" ; then
-        echo "ERROR: Could not concatenate \"$result\"." >&2
-        rv=1
-    elif ! rm -f -- "tmp/"*.pdf ; then
-        echo "ERROR: Could not remove tempfiles in \"$dir/tmp\"." >&2
-        rv=1
-    fi
-
-    exit "$rv"
-fi
-
diff --git a/run.sh b/run.sh
new file mode 100755
index 0000000..4f1a6ea
--- /dev/null
+++ b/run.sh
@@ -0,0 +1,345 @@
+#!/bin/bash
+
+##
+# Configuration
+
+# Before morphology analysis, reduce image dimensions by this factor
+simplify=2
+
+# Morphology to apply to reduce content to main area
+morphology="Open:6"
+morphology_shape="Disk"
+
+# Number of colors images are quantized to for component detection
+colors=4
+
+# Neighbors to evaluate when detecting connected components
+connected_components=8
+
+# Area treshold for connected components detection
+area_treshold=1000
+
+# Sigmoidal contrast adjustment used when trimming
+sigmoidal_contrast_trim="30,30%"
+
+# Sigmoidal contrast adjustment visible in result images
+sigmoidal_contrast="45,50%"
+
+# Number of colors result images are quantized to
+posterize=6
+
+# Keep intermediate images after processing (note that they will be removed in
+# any case at the next run of this script)
+keep_tmpfiles=true
+
+# Paper size of all pages
+paper="a4paper"
+
+# Offset in page where image should be placed
+offset="1cm 3cm"
+
+# Factor to scale image by before placing in page
+scale=0.75
+
+# Filename of complete result PDF
+result="pdf/result.pdf"
+
+##
+# Functions
+
+log() {
+    level=$1
+    msg=$2
+
+    printf "%s: %s\n" "$level" "$msg" >&2
+}
+
+error() {
+    log ERROR "$1"
+
+    exit "${2:-1}"
+}
+
+warning() {
+    log WARNING "$1"
+}
+
+info() {
+    log INFO "$1"
+}
+
+##
+# Arguments
+
+dir=$1
+
+if [[ -z $dir ]] ; then
+    error "Usage: $0 DIR"
+fi
+
+origdir=$(dirname "$(readlink -f "$dir")")
+
+if [[ ! -d $origdir ]] ; then
+    error "Directory not found: $dir ($origdir)"
+fi
+
+##
+# Main Program
+
+job_id=$(printf "%s" "$origdir" | sha256sum | cut -d" " -f1)
+
+if [[ -n $TMP ]] ; then
+    tmp_base=$TMP/photos2pdf/$job_id
+elif [[ -n $XDG_RUNTIME_DIR ]] ; then
+    tmp_base=$XDG_RUNTIME_DIR/photos2pdf/$job_id
+else
+    tmp_base=/tmp/photos2pdf/$job_id
+fi
+
+if ! mkdir -p "$tmp_base" ; then
+    error "Could not create temporary workign directory $tmp_base; aborted"
+fi
+
+indir="$tmp_base/in"
+tmpdir="$tmp_base/tmp"
+outdir="$tmp_base/out"
+pdfdir="$tmp_base/pdf"
+
+if ! test -d "$origdir" ; then
+    error "Directory \"$origdir\" not found; aborted."
+elif ! mkdir -p "$indir" "$outdir" "$pdfdir" "$tmpdir" ; then
+    error "Could not create working directories; aborted."
+elif ! rm -f -- "$indir/"*.* ; then
+    error "Could not delete existing input files; aborted."
+elif ! rm -f -- "$tmpdir/"*.* ; then
+    error "Could not delete existing tempfiles; aborted."
+elif ! rm -f -- "$outdir/"*.* ; then
+    error "Could not delete existing results; aborted."
+elif ! rm -f -- "$pdfdir/"*.* ; then
+    error "Could not delete existing PDFs; aborted."
+fi
+
+resize_percent=$((100/simplify))
+
+i=1
+rv=0
+
+while read -r jpg ; do
+    renamed=$(printf "%02d" "$i").jpg
+
+    if cp "$jpg" "$indir/$renamed" ; then
+        info "Copied \"$jpg\" to \"$renamed\"."
+    else
+        warning "Could not copy \"$jpg\" to \"$renamed\"."
+        rv=1
+    fi
+
+    i=$((i+1))
+done < <(ls --reverse --sort time -- "$origdir/"*.jpg)
+
+if [[ $rv -ne 0 ]] ; then
+    error "One or more errors during input file naming; aborted." "$rv"
+fi
+
+for jpg in "$indir/"*.jpg ; do
+    base=$(basename "$jpg" .jpg)
+    tmp1="$tmpdir/$base.tmp1.png"
+    tmp2="$tmpdir/$base.tmp2.png"
+    com="$tmpdir/$base.com.png"
+    trimmed="$tmpdir/$base.trimmed.png"
+    inf="$tmpdir/$base.txt"
+    out="$outdir/$base.png"
+
+    if ! convert \
+        "$jpg" \
+        -colorspace RGB \
+        -sigmoidal-contrast "$sigmoidal_contrast_trim" \
+        -resize "$resize_percent%" \
+        -colors "$colors" \
+        -morphology "$morphology" "$morphology_shape" \
+        "$tmp1"
+    then
+        warning "Could not create test image \"$tmp1\"; skipped."
+        rv=1
+        continue
+    fi
+
+    draw=()
+    v=255
+
+    while read -r primitive ; do
+        draw+=("-fill" "rgb($v,$v,$v)" "-draw" "$primitive")
+        v=$((v-2))
+    done < <(
+        convert \
+            "$tmp1" \
+            -define connected-components:verbose=true \
+            -define connected-components:exclude-header=true \
+            -define connected-components:sort-order=increasing \
+            -define connected-components:mean-color=true \
+            -define connected-components:area-threshold="$area_treshold" \
+            -virtual-pixel None \
+            -connected-components "$connected_components" \
+            -auto-level \
+            "$com" | \
+        perl -e '
+            while(<>){
+                chomp;
+                next unless /(\d+)x(\d+)\+(\d+)\+(\d+)/;
+                printf
+                    STDERR
+                    "DEBUG: component: $_\n";
+                printf
+                    "rectangle %d,%d,%d,%d\n",
+                    $1, $2, $1+$3, $2+$4;
+            }
+
+        ' | \
+        sort | \
+        uniq
+    )
+
+    printf "DEBUG: connected components in \"%s\":" "$tmp1"
+    for d in "${draw[@]}" ; do
+        printf " \"%s\"" "$d"
+    done
+    printf "\n"
+
+    if ! convert \
+        "$tmp1" \
+        -fill black -colorize 100 \
+        "${draw[@]}" \
+        "$tmp2"
+    then
+        warning "Could not convert \"$tmp1\" to \"$tmp2\"; skipped."
+        rv=1
+        continue
+    elif ! convert \
+        "$tmp2" \
+        -trim info: \
+        > "$inf"
+    then
+        warning "Could not determine trim info from \"$tmp2\"; skipped."
+        rv=1
+        continue
+    fi
+
+    if "$keep_tmpfiles" ; then
+        if ! convert \
+            "$tmp2" \
+            -trim \
+            "$trimmed"
+        then
+            warning "Could not test trim \"$tmp2\"; skipped."
+            rv=1
+            continue
+        fi
+    fi
+
+    # upscale crop area from smaller temporary picture sizes
+    crop=$(simplify=$simplify perl -MEnv -e '
+        while(<>) {
+            chomp();
+            s/(\d+)/$1*${simplify}/eg;
+            /(\d+)x(\d+) \d+x\d+\+(\d+)\+(\d+)/ && do {
+                print $1."x".$2."+".$3."+".$4;
+            }
+        }
+    ' < "$inf")
+
+    if ! "$keep_tmpfiles" ; then
+        if ! rm -f -- "$tmp1" "$tmp2" "$trimmed" "$inf" ; then
+            warning "Could not remove temporary files in \"$dir/tmp\"."
+            rv=1
+        fi
+    fi
+
+    info "Processing $base: crop=$crop ..."
+
+    if ! convert \
+        "$jpg" \
+        -crop "$crop" \
+        -sigmoidal-contrast "$sigmoidal_contrast" \
+        +dither -posterize "$posterize" \
+        "$out"
+    then
+        warning "Could not process \"$jpg\"; skipped."
+        rv=1
+        continue
+    fi
+done
+
+if [[ $rv -ne 0 ]] ; then
+    error "One or more errors during image conversion; aborted." "$rv"
+fi
+
+for png in "out/"*.png ; do
+    info "Processing \"$png\" ..."
+
+    read -r width height < <(
+        identify -verbose "$png" | \
+        perl -ne '/Geometry: (\d+)x(\d+)/ && print "$1 $2"'
+    )
+
+    if [[ -z $width ]] || [[ -z $height ]] ; then
+        warning "Could not identify width or height of \"$png\"; skipped."
+        rv=1
+        continue
+    elif [[ $width -gt $height ]] ; then
+        backdrop=template/a4paper/landscape.pdf
+        jam_landscape=--landscape
+    else
+        backdrop=template/a4paper/portrait.pdf
+        jam_landscape=--no-landscape
+    fi
+
+    base=$(basename "$png" .png)
+    pdf=tmp/$base.pdf
+    jammed=tmp/$base-pdfjam.pdf
+    backdropped=tmp/$base.backdropped.pdf
+
+    if ! convert "$png" "$pdf" ; then
+        warning "Could not convert \"$png\" to PDF; skipped."
+        rv=1
+        continue
+    elif !  pdfjam \
+        --quiet \
+        --outfile tmp \
+        --paper "$paper" \
+        "$jam_landscape" \
+        --scale "$scale" \
+        --offset "$offset" \
+        "$pdf"
+    then
+        warning "Could not align \"$pdf\"; skipped."
+        rv=1
+        continue
+    elif ! pdftk \
+        "$jammed" \
+        stamp "$backdrop" \
+        output "$backdropped"
+    then
+        warning "Could not watermark \"$pdf\"; skipped."
+        rv=1
+        continue
+    fi
+done
+
+input=()
+
+while read -r pdf ; do
+    input+=("$pdf")
+done < <(ls -- "$tmpdir/"*.backdropped.pdf)
+
+if ! pdftk "${input[@]}" cat output "$result" ; then
+    warning "Could not concatenate \"$result\"."
+    rv=1
+elif ! rm -f -- "tmp/"*.pdf ; then
+    warning "Could not remove tempfiles in \"$dir/tmp\"."
+    rv=1
+fi
+
+if [[ $rv -ne 0 ]] ; then
+    error "One or more errors during PDF generation; aborted." "$rv"
+fi
+