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-rw-r--r--scripts/pkgdelta.sh.in99
1 files changed, 77 insertions, 22 deletions
diff --git a/scripts/pkgdelta.sh.in b/scripts/pkgdelta.sh.in
index 992c85f3..2fd116cb 100644
--- a/scripts/pkgdelta.sh.in
+++ b/scripts/pkgdelta.sh.in
@@ -30,6 +30,13 @@ declare -r myver='@PACKAGE_VERSION@'
QUIET=0
+# minimal of package before deltas are generated (bytes)
+min_pkg_size=$((1024*1024))
+
+# percent of new package above which the delta will be discarded
+max_delta_size=70
+
+
# ensure we have a sane umask set
umask 0022
@@ -38,11 +45,16 @@ m4_include(library/output_format.sh)
# print usage instructions
usage() {
printf "pkgdelta (pacman) %s\n\n" "$myver"
- printf -- "$(gettext "Usage: pkgdelta [-q] <package1> <package2>\n")"
+ printf -- "$(gettext "Usage: pkgdelta [options] <package1> <package2>\n")"
printf -- "$(gettext "\
pkgdelta will create a delta file between two packages.\n\
This delta file can then be added to a database using repo-add.\n\n")"
printf -- "$(gettext "Example: pkgdelta pacman-3.0.0.pkg.tar.gz pacman-3.0.1.pkg.tar.gz")\n"
+ echo
+ printf -- "$(gettext "Options:\n")"
+ printf -- " -q ""$(gettext "quiet\n")"
+ printf -- " --min-pkg-size ""$(gettext "minimal of package before deltas are generated (bytes)\n")"
+ printf -- " --max-delta-size ""$(gettext "percent of new package above which the delta will be discarded\n")"
}
version() {
@@ -53,6 +65,10 @@ This is free software; see the source for copying conditions.\n\
There is NO WARRANTY, to the extent permitted by law.\n")"
}
+isnumeric() {
+ [[ $1 != *[!0-9]* ]]
+}
+
read_pkginfo()
{
pkgname= pkgver= arch=
@@ -93,6 +109,13 @@ create_xdelta()
newver="$pkgver"
newarch="$arch"
+ pkgsize="$(@SIZECMD@ -L "$newfile")"
+
+ if ((pkgsize < min_pkg_size)); then
+ msg "$(gettext "Skipping delta creation for small package: %s - size %s")" "$newname" "$pkgsize"
+ return 0
+ fi
+
if [[ $oldname != "$newname" ]]; then
error "$(gettext "The package names don't match : '%s' and '%s'")" "$oldname" "$newname"
return 1
@@ -109,46 +132,78 @@ create_xdelta()
fi
msg "$(gettext "Generating delta from version %s to version %s")" "$oldver" "$newver"
- deltafile="$(dirname $newfile)/$pkgname-${oldver}_to_${newver}-$arch.delta"
+ deltafile=$(dirname "$newfile")/$pkgname-${oldver}_to_${newver}-$arch.delta
local ret=0
xdelta3 -q -f -s "$oldfile" "$newfile" "$deltafile" || ret=$?
if (( ret )); then
error "$(gettext "Delta could not be created.")"
return 1
- else
- msg "$(gettext "Generated delta : '%s'")" "$deltafile"
- (( QUIET )) && echo "$deltafile"
fi
+
+ deltasize="$(@SIZECMD@ -L "$deltafile")"
+
+ if ((max_delta_size * pkgsize / 100 < deltasize)); then
+ msg "$(gettext "Delta package larger than maximum size. Removing.")"
+ rm -f "$deltafile"
+ return 0
+ fi
+
+ msg "$(gettext "Generated delta : '%s'")" "$deltafile"
+ (( QUIET )) && echo "$deltafile"
+
return 0
}
-case "$1" in
- -h|--help) usage; exit 0 ;;
- -V|--version) version; exit 0 ;;
- -q|--quiet) QUIET=1; shift ;;
-esac
-
-if (( $# != 2 )); then
+declare -a args
+
+# parse arguments
+while (( $# )); do
+ case "$1" in
+ -h|--help) usage; exit 0 ;;
+ -V|--version) version; exit 0 ;;
+ -q|--quiet) QUIET=1;;
+ --min-pkg-size)
+ if ! isnumeric "$2"; then
+ echo "invalid argument '$2' for option -- '$1'"
+ exit 1
+ fi
+ min_pkg_size=$2
+ shift
+ ;;
+ --max-delta-size)
+ arg=$(echo "$2" | awk '{print $1 * 100}')
+ if ! isnumeric "$arg" || (($arg > 200)); then
+ echo "invalid argument '$2' for option -- '$1'"
+ exit 1
+ fi
+ max_delta_size=$arg
+ shift
+ ;;
+ --) shift; args+=("$@"); break 2 ;;
+ -*) echo "invalid option -- '$1'"; usage; exit 1 ;;
+ *) args+=("$1");;
+ esac
+ shift
+done
+
+if (( ${#args[@]} != 2 )); then
usage
exit 1
fi
-if [[ ! -f $1 ]]; then
- error "$(gettext "File '%s' does not exist")" "$1"
- exit 1
-fi
-
-if [[ ! -f $2 ]]; then
- error "$(gettext "File '%s' does not exist")" "$2"
- exit 1
-fi
+for i in "${args[@]}"; do
+ if [[ ! -f $i ]]; then
+ error "$(gettext "File '%s' does not exist")" "$i"
+ exit 1
+ fi
+done
if ! type xdelta3 &>/dev/null; then
error "$(gettext "Cannot find the xdelta3 binary! Is xdelta3 installed?")"
exit 1
fi
-create_xdelta "$1" "$2"
+create_xdelta "${args[@]}"
# vim: set ts=2 sw=2 noet: