Optimize script

scripts/index.sh

@@ -4,4 +4,7 @@ source ~/.scripts/debloc.sh
 source ~/.scripts/dotfiles.sh
 source ~/.scripts/installPreferences.sh
 source ~/.scripts/installArch.sh
+function optimize {
+    bash ~/.scripts/optimize.sh
+}
 alias beep=~/.scripts/beep.sh

scripts/optimize.sh

@@ -0,0 +1,136 @@
+#!/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
+
+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 replaceImg { # 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
+
+    # Bitmap verification
+    ppmc="$(mktemp --suffix .ppm)"
+    ppmo="$(mktemp --suffix .ppm)"
+    convert "$c" "$ppmc"
+    convert "$o" "$ppmo"
+
+    if cmp --silent "$ppmo" "$ppmc"; then
+        mv "$c" "$o"
+        saved=$(($os - $cs))
+        echo "→ $os ⇒ $cs (saved $saved bytes)"
+        newtotal=$(($(cat $total) + $saved))
+        echo -n $newtotal > $total
+    else
+        echo "→ Candidate don't have the same bit map as original, skipping!"
+    fi
+    rm "$ppmc" "$ppmo"
+
+}
+
+# JPEG (requires jpegtran)
+while read image
+do
+    echo Processing $image
+
+    prog=$(mktemp --suffix .jpg)
+    jpegtran -copy all -progressive "$image" > "$prog"
+    echo "→ Progressive done"
+
+    optz=$(mktemp --suffix .jpg)
+    jpegtran -copy all -optimize "$image" > "$optz"
+    echo "→ Optimize done"
+
+    progs=$(wc -c "$prog" | cut -d' ' -f1)
+    optzs=$(wc -c "$optz" | cut -d' ' -f1)
+    if [[ $progs -le $optzs ]]; then
+        echo "→ Using progressive"
+        replaceImg "$prog" "$image"
+        rm "$optz"
+    else
+        echo "→ Using optimized"
+        replaceImg "$optz" "$image"
+        rm "$prog"
+    fi
+
+done <<< "$(find $dir -type f -iregex ".+.jpe?g$")"
+
+# PNG (requires optipng)
+while read image
+do
+    echo Processing $image
+
+    temp=$(mktemp --suffix .png)
+    cp "$image" "$temp"
+    optipng -o7 -quiet "$temp"
+    echo "→ Optimize done"
+
+    replaceImg "$temp" "$image"
+
+done <<< "$(find $dir -type f -iname "*.png")"
+
+# SVG (requires svgo)
+while read image
+do
+    echo Processing $image
+
+    temp=$(mktemp --suffix .svg)
+    cp "$image" "$temp"
+    svgo --quiet "$temp"
+    echo "→ Optimize done"
+
+    replaceImg "$temp" "$image"
+
+done <<< "$(find $dir -type f -iname "*.svg")"
+
+# GIT (requires git)
+find $dir -type d -name .git -print0 | while IFS= read -r -d '' dir; do
+    (cd "$dir"; git gc)
+done
+
+showtotal