gecko/tools/update-packaging/make_incremental_update.sh

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#!/bin/bash
#
# This tool generates incremental update packages for the update system.
# Author: Darin Fisher
#
. $(dirname "$0")/common.sh
# -----------------------------------------------------------------------------
print_usage() {
notice "Usage: $(basename $0) [OPTIONS] ARCHIVE FROMDIR TODIR"
notice ""
notice "The differences between FROMDIR and TODIR will be stored in ARCHIVE."
notice ""
notice "Options:"
notice " -h show this help text"
notice " -f clobber this file in the installation"
notice " Must be a path to a file to clobber in the partial update."
notice ""
}
check_for_forced_update() {
force_list="$1"
forced_file_chk="$2"
local f
if [ "${forced_file_chk##*.}" = "chk" ]
then
## "true" *giggle*
return 0;
fi
for f in $force_list; do
#echo comparing $forced_file_chk to $f
if [ "$forced_file_chk" = "$f" ]; then
## "true" *giggle*
return 0;
fi
done
## 'false'... because this is bash. Oh yay!
return 1;
}
if [ $# = 0 ]; then
print_usage
exit 1
fi
requested_forced_updates=''
while getopts "hf:" flag
do
case "$flag" in
h) print_usage; exit 0
;;
f) requested_forced_updates="$requested_forced_updates $OPTARG"
;;
?) print_usage; exit 1
;;
esac
done
# -----------------------------------------------------------------------------
let arg_start=$OPTIND-1
shift $arg_start
archive="$1"
olddir="$2"
newdir="$3"
workdir="$newdir.work"
manifest="$workdir/update.manifest"
archivefiles="update.manifest"
mkdir -p "$workdir"
# Generate a list of all files in the target directory.
pushd "$olddir"
if test $? -ne 0 ; then
exit 1
fi
list_files oldfiles
popd
pushd "$newdir"
if test $? -ne 0 ; then
exit 1
fi
list_files newfiles
popd
> $manifest
num_oldfiles=${#oldfiles[*]}
for ((i=0; $i<$num_oldfiles; i=$i+1)); do
f="${oldfiles[$i]}"
# This file is created by Talkback, so we can ignore it
if [ "$f" = "readme.txt" ]; then
continue 1
fi
# If this file exists in the new directory as well, then check if it differs.
if [ -f "$newdir/$f" ]; then
if ! diff "$olddir/$f" "$newdir/$f" > /dev/null; then
# Compute both the compressed binary diff and the compressed file, and
# compare the sizes. Then choose the smaller of the two to package.
echo " diffing $f"
dir=$(dirname "$workdir/$f")
mkdir -p "$dir"
$MBSDIFF "$olddir/$f" "$newdir/$f" "$workdir/$f.patch"
$BZIP2 -z9 "$workdir/$f.patch"
$BZIP2 -cz9 "$newdir/$f" > "$workdir/$f"
patchfile="$workdir/$f.patch.bz2"
patchsize=$(get_file_size "$patchfile")
fullsize=$(get_file_size "$workdir/$f")
if check_for_forced_update "$requested_forced_updates" "$f"; then
echo 1>&2 " FORCING UPDATE for file '$f'..."
make_add_instruction "$f" >> $manifest
rm -f "$patchfile"
archivefiles="$archivefiles \"$f\""
continue 1
fi
if [ $patchsize -lt $fullsize -a "$f" != "removed-files" ]; then
make_patch_instruction "$f" >> $manifest
mv -f "$patchfile" "$workdir/$f.patch"
rm -f "$workdir/$f"
archivefiles="$archivefiles \"$f.patch\""
else
make_add_instruction "$f" >> $manifest
rm -f "$patchfile"
archivefiles="$archivefiles \"$f\""
fi
fi
else
echo "remove \"$f\"" >> $manifest
fi
done
# Now, we just need to worry about newly added files
num_newfiles=${#newfiles[*]}
for ((i=0; $i<$num_newfiles; i=$i+1)); do
f="${newfiles[$i]}"
# If we've already tested this file, then skip it
for ((j=0; $j<$num_oldfiles; j=$j+1)); do
if [ "$f" = "${oldfiles[j]}" ]; then
continue 2
fi
done
dir=$(dirname "$workdir/$f")
mkdir -p "$dir"
$BZIP2 -cz9 "$newdir/$f" > "$workdir/$f"
make_add_instruction "$f" >> "$manifest"
archivefiles="$archivefiles \"$f\""
done
# Append remove instructions for any dead files.
append_remove_instructions "$newdir" >> $manifest
$BZIP2 -z9 "$manifest" && mv -f "$manifest.bz2" "$manifest"
eval "$MAR -C \"$workdir\" -c output.mar $archivefiles"
mv -f "$workdir/output.mar" "$archive"
# cleanup
rm -fr "$workdir"