mirror of
https://github.com/moparisthebest/pacman
synced 2024-11-17 14:55:07 -05:00
48 lines
1.7 KiB
Bash
48 lines
1.7 KiB
Bash
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#!/bin/bash
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o=$(basename $1)
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u=$2
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CARCH="i686" # Hmmm where to get this from? /etc/makepkg.conf?
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cached_file=""
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# Only check for pkg.tar.gz files in the cache, we download db.tar.gz as well
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if [[ "$o" =~ "pkg.tar.gz" ]] # if $o contains pkg.tar.gz
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then
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pkgname=${o%-*-[0-9]-${CARCH}.pkg.tar.gz.part} # Parse out the package name
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newend=${o##$pkgname-} # Parse out everything following pkgname
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new_version=${newend%-${CARCH}.pkg.tar.gz.part} # Strip off .pkg.tar.gz.part leaving version
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url=${u%/*}
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for cached_file in $(ls -r /var/cache/pacman/pkg/${pkgname}-*-${CARCH}.pkg.tar.gz 2>/dev/null); do
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# just take the first one, by name. I suppose we could take the latest by date...
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oldend=${cached_file##*/$pkgname-}
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old_version=${oldend%-${CARCH}.pkg.tar.gz}
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if [ "$old_version" = "$new_version" ]; then
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# We already have the new version in the cache! Just continue the download.
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cached_file=""
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fi
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break
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done
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fi
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if [ "$cached_file" != "" ]; 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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# try to download the delta
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if wget --passive-ftp -c $url/$delta_name; then
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# Now apply the delta to the cached file to produce the new file
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echo Applying delta...
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if xdelta patch $delta_name $cached_file $o; then
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# Remove the delta now that we are finished with it
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rm $delta_name
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else
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# Hmmm. xdelta failed for some reason
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rm $delta_name
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# just download the file
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wget --passive-ftp -c -O $o $u
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fi
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else
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# just download the file
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wget --passive-ftp -c -O $o $u
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fi
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else
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# just download the file
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wget --passive-ftp -c -O $o $u
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fi
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