71 lines
2.0 KiB
Bash
Executable File
71 lines
2.0 KiB
Bash
Executable File
#!/bin/bash
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if [ -r "/etc/makepkg.conf" ]; then
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source /etc/makepkg.conf
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else
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echo "wget-xdelta: Unable to find makepkg.conf"
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exit 1
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fi
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if [ -r ~/.makepkg.conf ]; then
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source ~/.makepkg.conf
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fi
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out_file=$(basename $1)
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file_url=$2
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if ! [[ "$out_file" =~ "pkg.tar.gz" ]]; then
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# If it's not a package file download as normal and exit.
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#wget --passive-ftp -c -O "$out_file" "$file_url"
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exit $?
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fi
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# Get the package name and version
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[[ "$out_file" =~ "$CARCH" ]] && arch="-$CARCH" || arch=""
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pkg_data=$(echo $out_file | \
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sed "s|^\(.*\)-\([[:alnum:]_\.]*-[[:alnum:]_\.]*\)${arch}${PKGEXT}.part|\1 \2|")
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pkgname=$(echo $pkg_data | cut -d ' ' -f 1)
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new_version=$(echo $pkg_data | cut -d ' ' -f 2)
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base_url=${file_url%/*}
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# Look for the last version
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for file in $(ls -r /var/cache/pacman/pkg/${pkgname}-*-*{,-$CARCH}$PKGEXT 2>/dev/null); do
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[[ "$file" =~ "$CARCH" ]] && arch="-$CARCH" || arch=""
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check_version=$(echo $file | \
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sed "s|^.*/${pkgname}-\([[:alnum:]_\.]*-[[:alnum:]_\.]*\)${arch}$PKGEXT$|\1|" | \
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grep -v "^/var/cache/pacman/pkg")
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[ "$check_version" = "" ] && continue
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vercmp=$(vercmp "$check_version" "$old_version")
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if [ "$check_version" != "$new_version" -a $vercmp -gt 0 ]; then
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old_version=$check_version
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old_file=$file
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fi
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done
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if [ "$old_version" != "" -a "$old_version" != "$new_version" ]; then
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# Great, we have a cached file, now calculate a patch name from it
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delta_name="$pkgname-${old_version}_to_${new_version}-${CARCH}.delta"
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echo "wget-xdelta: Attempting to download delta $delta_name..." >&2
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if wget --passive-ftp -c "$base_url/$delta_name"; then
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echo "wget-xdelta: Applying delta..."
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if xdelta patch "$delta_name" "$old_file" "$out_file"; then
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echo "wget-xdelta: Delta applied successfully!"
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rm "$delta_name"
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exit 0
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else
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echo "wget-xdelta: Failed to apply delta!"
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rm $delta_name
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fi
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fi
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fi
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echo "wget-xdelta: Downloading new package..."
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wget --passive-ftp -c -O "$out_file" "$file_url"
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exit $?
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# vim:set ts=4 sw=4 noet:
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