137 lines
3 KiB
Bash
137 lines
3 KiB
Bash
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#!/usr/bin/env bash
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# Optimizes everything the script can find in a folder,
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# meaning it will compress files as much as possible,
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# without losing any data (verification will be done
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# in order to verify that no data has been done)
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# (executable)
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# TODO Run in parallel
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dir=${1:-$PWD}
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total=$(mktemp)
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echo -n 0 > $total
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function showtotal {
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echo "Total saved: $(cat "$total") bytes"
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rm $total
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exit
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}
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trap showtotal SIGTERM SIGINT SIGFPE
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function replaceImg { # candidate original
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c="$1"
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o="$2"
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# File verifications
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if [ ! -f "$o" ]; then
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echo "→ Original is inexistant, skipping!"
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return
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fi
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if [ ! -f "$c" ]; then
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echo "→ Candidate is inexistant, skipping!"
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return
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fi
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# Size verifications
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cs=$(wc -c "$c" | cut -d' ' -f1)
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os=$(wc -c "$o" | cut -d' ' -f1)
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if [ $cs -le 0 ]; then
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echo "→ Candidate is empty, skipping!"
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rm "$c"
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return
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fi
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if [ $cs -eq $os ]; then
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echo "→ Candidate weight the same, skipping."
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rm "$c"
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return
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fi
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if [ $cs -gt $os ]; then
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echo "→ Candidate is larger, skipping."
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rm "$c"
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return
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fi
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# Bitmap verification
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ppmc="$(mktemp --suffix .ppm)"
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ppmo="$(mktemp --suffix .ppm)"
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convert "$c" "$ppmc"
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convert "$o" "$ppmo"
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if cmp --silent "$ppmo" "$ppmc"; then
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mv "$c" "$o"
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saved=$(($os - $cs))
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echo "→ $os ⇒ $cs (saved $saved bytes)"
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newtotal=$(($(cat $total) + $saved))
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echo -n $newtotal > $total
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else
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echo "→ Candidate don't have the same bit map as original, skipping!"
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fi
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rm "$ppmc" "$ppmo"
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}
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# JPEG (requires jpegtran)
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while read image
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do
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echo Processing $image
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prog=$(mktemp --suffix .jpg)
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jpegtran -copy all -progressive "$image" > "$prog"
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echo "→ Progressive done"
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optz=$(mktemp --suffix .jpg)
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jpegtran -copy all -optimize "$image" > "$optz"
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echo "→ Optimize done"
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progs=$(wc -c "$prog" | cut -d' ' -f1)
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optzs=$(wc -c "$optz" | cut -d' ' -f1)
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if [[ $progs -le $optzs ]]; then
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echo "→ Using progressive"
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replaceImg "$prog" "$image"
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rm "$optz"
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else
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echo "→ Using optimized"
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replaceImg "$optz" "$image"
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rm "$prog"
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fi
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done <<< "$(find $dir -type f -iregex ".+.jpe?g$")"
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# PNG (requires optipng)
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while read image
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do
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echo Processing $image
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temp=$(mktemp --suffix .png)
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cp "$image" "$temp"
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optipng -o7 -quiet "$temp"
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echo "→ Optimize done"
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replaceImg "$temp" "$image"
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done <<< "$(find $dir -type f -iname "*.png")"
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# SVG (requires svgo)
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while read image
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do
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echo Processing $image
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temp=$(mktemp --suffix .svg)
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cp "$image" "$temp"
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svgo --quiet "$temp"
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echo "→ Optimize done"
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replaceImg "$temp" "$image"
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done <<< "$(find $dir -type f -iname "*.svg")"
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# GIT (requires git)
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find $dir -type d -name .git -print0 | while IFS= read -r -d '' dir; do
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(cd "$dir"; git gc)
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done
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showtotal
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