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