зеркало из https://github.com/mozilla/pjs.git
147 строки
3.9 KiB
Bash
Executable File
147 строки
3.9 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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# -----------------------------------------------------------------------------
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# By default just assume that these tools exist on our path
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MAR=${MAR:-mar}
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BZIP2=${BZIP2:-bzip2}
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MBSDIFF=${MBSDIFF:-mbsdiff}
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# -----------------------------------------------------------------------------
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print_usage() {
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echo "Usage: $(basename $0) [OPTIONS] ARCHIVE FROMDIR TODIR"
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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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if [ $1 = -h ]; then
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print_usage
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echo ""
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echo "The differences between FROMDIR and TODIR will be stored in ARCHIVE."
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echo ""
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echo "Options:"
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echo " -h show this help text"
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echo ""
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exit 1
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fi
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# -----------------------------------------------------------------------------
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get_file_size() {
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info=($(ls -l "$1"))
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echo ${info[4]}
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}
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make_add_instruction() {
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f="$1"
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is_extension=$(echo "$f" | grep -c 'extensions/.*/')
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if [ $is_extension = "1" ]; then
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# Use the subdirectory of the extensions folder as the file to test
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# before performing this add instruction.
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testdir=$(echo "$f" | sed 's/\(extensions\/[^\/]*\)\/.*/\1/')
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echo "add-if \"$testdir\" \"$f\""
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else
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echo "add \"$f\""
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fi
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}
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make_patch_instruction() {
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f="$1"
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is_extension=$(echo "$f" | grep -c 'extensions/.*/')
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if [ $is_extension = "1" ]; then
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# Use the subdirectory of the extensions folder as the file to test
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# before performing this add instruction.
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testdir=$(echo "$f" | sed 's/\(extensions\/[^\/]*\)\/.*/\1/')
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echo "patch-if \"$testdir\" \"$f.patch\" \"$f\""
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else
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echo "patch \"$f.patch\" \"$f\""
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fi
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}
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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="$workdir/update.manifest"
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archivefiles="update.manifest"
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# Generate a list of all files in the target directory.
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list=$(cd "$olddir" && find . -type f | sed 's/\.\/\(.*\)/"\1"/')
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eval "oldfiles=($list)"
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list=$(cd "$newdir" && find . -type f | sed 's/\.\/\(.*\)/"\1"/')
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eval "newfiles=($list)"
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mkdir -p "$workdir"
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> $manifest
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num_oldfiles=${#oldfiles[*]}
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for ((i=0; $i<$num_oldfiles; i=$i+1)); do
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f=${oldfiles[$i]}
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# If this file exists in the new directory as well, then check if it differs.
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if [ -f "$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 [ $patchsize -lt $fullsize ]; then
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make_patch_instruction "$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=$i+1)); do
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f="${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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$BZIP2 -z9 "$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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