diff options
Diffstat (limited to 'contrib')
| -rwxr-xr-x | contrib/wget-xdelta.sh | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/contrib/wget-xdelta.sh b/contrib/wget-xdelta.sh new file mode 100755 index 00000000..d99dd3cc --- /dev/null +++ b/contrib/wget-xdelta.sh @@ -0,0 +1,47 @@ +#!/bin/bash +o=$(basename $1) +u=$2 +CARCH="i686" # Hmmm where to get this from? /etc/makepkg.conf? +cached_file="" +# Only check for pkg.tar.gz files in the cache, we download db.tar.gz as well +if [[ "$o" =~ "pkg.tar.gz" ]] # if $o contains pkg.tar.gz +then + pkgname=${o%-*-[0-9]-${CARCH}.pkg.tar.gz.part} # Parse out the package name + newend=${o##$pkgname-} # Parse out everything following pkgname + new_version=${newend%-${CARCH}.pkg.tar.gz.part} # Strip off .pkg.tar.gz.part leaving version + url=${u%/*} + for cached_file in $(ls -r /var/cache/pacman/pkg/${pkgname}-*-${CARCH}.pkg.tar.gz 2>/dev/null); do + # just take the first one, by name. I suppose we could take the latest by date... + oldend=${cached_file##*/$pkgname-} + old_version=${oldend%-${CARCH}.pkg.tar.gz} + if [ "$old_version" = "$new_version" ]; then + # We already have the new version in the cache! Just continue the download. + cached_file="" + fi + break + done +fi +if [ "$cached_file" != "" ]; then + # Great, we have a cached file, now calculate a patch name from it + delta_name=$pkgname-${old_version}_to_${new_version}-${CARCH}.delta + # try to download the delta + if wget --passive-ftp -c $url/$delta_name; then + # Now apply the delta to the cached file to produce the new file + echo Applying delta... + if xdelta patch $delta_name $cached_file $o; then + # Remove the delta now that we are finished with it + rm $delta_name + else + # Hmmm. xdelta failed for some reason + rm $delta_name + # just download the file + wget --passive-ftp -c -O $o $u + fi + else + # just download the file + wget --passive-ftp -c -O $o $u + fi +else + # just download the file + wget --passive-ftp -c -O $o $u +fi |