Let my HOME alone 1/2

config/scripts/optimize

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+#!/usr/bin/env bash
+
+# Optimizes everything the script can find in a folder,
+# meaning it will compress files as much as possible,
+# without losing any data (verification will be done
+# in order to verify that no data has been done)
+# (executable)
+
+# TODO Run in parallel
+# TODO Lots of dupplicated code there
+
+dir=${1:-$PWD}
+total=$(mktemp)
+echo -n 0 > $total
+
+function showtotal {
+    echo "Total saved: $(cat "$total") bytes"
+    rm $total
+    exit
+}
+
+trap showtotal SIGTERM SIGINT SIGFPE
+
+function doReplace { # candidate original
+    mv "$c" "$o"
+    saved=$(($os - $cs))
+    perc=$((100 * $saved / $os))
+    echo "→ $os ⇒ $cs (saved $saved bytes, or ${perc}%)"
+    newtotal=$(($(cat $total) + $saved))
+    echo -n $newtotal > $total
+}
+
+function replace { # candidate original
+    c="$1"
+    o="$2"
+
+    # File verifications
+    if [ ! -f "$o" ]; then
+        echo "→ Original is inexistant, skipping!"
+        return
+    fi
+    if [ ! -f "$c" ]; then
+        echo "→ Candidate is inexistant, skipping!"
+        return
+    fi
+
+    # Size verifications
+    cs=$(wc -c "$c" | cut -d' ' -f1)
+    os=$(wc -c "$o" | cut -d' ' -f1)
+    if [ $cs -le 0 ]; then
+        echo "→ Candidate is empty, skipping!"
+        rm "$c"
+        return
+    fi
+    if [ $cs -eq $os ]; then
+        echo "→ Candidate weight the same, skipping."
+        rm "$c"
+        return
+    fi
+    if [ $cs -gt $os ]; then
+        echo "→ Candidate is larger, skipping."
+        rm "$c"
+        return
+    fi
+
+    doReplace "$c" "$o"
+}
+
+function replaceImg { # candidate original
+    # With bitmap verification
+
+    c="$1"
+    o="$2"
+
+    # File verifications
+    if [ ! -f "$o" ]; then
+        echo "→ Original is inexistant, skipping!"
+        return
+    fi
+    if [ ! -f "$c" ]; then
+        echo "→ Candidate is inexistant, skipping!"
+        return
+    fi
+
+    # Size verifications
+    cs=$(wc -c "$c" | cut -d' ' -f1)
+    os=$(wc -c "$o" | cut -d' ' -f1)
+    if [ $cs -le 0 ]; then
+        echo "→ Candidate is empty, skipping!"
+        rm "$c"
+        return
+    fi
+    if [ $cs -eq $os ]; then
+        echo "→ Candidate weight the same, skipping."
+        rm "$c"
+        return
+    fi
+    if [ $cs -gt $os ]; then
+        echo "→ Candidate is larger, skipping."
+        rm "$c"
+        return
+    fi
+
+    # Bitmap verification
+    ppmc="$(mktemp --suffix .ppm)"
+    ppmo="$(mktemp --suffix .ppm)"
+    convert "$c" "$ppmc"
+    convert "$o" "$ppmo"
+
+    if cmp --silent "$ppmo" "$ppmc"; then
+        doReplace "$c" "$o"
+    else
+        echo "→ Candidate don't have the same bit map as original, skipping!"
+    fi
+    rm -f "$ppmc" "$ppmo" "$c"
+
+}
+
+# JPEG (requires jpegtran)
+while read image
+do
+    if [ -z "$image" ]; then continue; fi
+    echo Processing $image
+
+    prog=$(mktemp --suffix .jpg)
+    jpegtran -copy all -progressive "$image" > "$prog"
+    echo "→ Progressive done"
+    progs=$(wc -c "$prog" | cut -d' ' -f1)
+    replace "$prog" "$image"
+
+
+done <<< "$(find "$dir" -type f -iregex ".+.jpe?g$")"
+
+# PNG (requires optipng)
+while read image
+do
+    if [ -z "$image" ]; then continue; fi
+    echo Processing $image
+
+    temp=$(mktemp --suffix .png)
+    cp "$image" "$temp"
+    optipng -quiet "$temp"
+    echo "→ Optimize done"
+
+    replace "$temp" "$image"
+
+done <<< "$(find "$dir" -type f -iname "*.png")"
+
+# # SVG (requires scour)
+# while read image
+# do
+#     if [ -z "$image" ]; then continue; fi
+#     echo Processing $image
+#
+#     temp=$(mktemp --suffix .svg)
+#     scour --quiet "$image" "$temp" --no-line-breaks
+#     echo "→ Optimize done"
+#
+#     replaceImg "$temp" "$image"
+#
+# done <<< "$(find "$dir" -type f -iname "*.svg")"
+
+# NOTE Explicitely disabled since:
+# - I only have ~50 MiB of SVG in TOTAL
+# - Most conversions are not image losseless
+# - Even when they are losseless, they are mostly worthless
+# - I might want to keep editor data and/or ids for some of them
+# So rather use scour explicitely when needed
+
+cleandev
+
+showtotal