diff options
| -rwxr-xr-x | git-deltafy-script | 50 |
1 files changed, 32 insertions, 18 deletions
diff --git a/git-deltafy-script b/git-deltafy-script index 21a95692ff..476d8796ec 100755 --- a/git-deltafy-script +++ b/git-deltafy-script @@ -1,6 +1,6 @@ #!/bin/bash -# Example script to deltafy an entire GIT repository based on the commit list. +# Example script to deltify an entire GIT repository based on the commit list. # The most recent version of a file is the reference and previous versions # are made delta against the best earlier version available. And so on for # successive versions going back in time. This way the increasing delta @@ -25,37 +25,51 @@ set -e -depth= -[ "$1" == "-d" ] && depth="--max-depth=$2" && shift 2 +max_depth= +[ "$1" == "-d" ] && max_depth="--max-depth=$2" && shift 2 + +overlap=30 +max_behind="--max-behind=$overlap" function process_list() { if [ "$list" ]; then echo "Processing $curr_file" - echo "$head $list" | xargs git-mkdelta $depth --max-behind=30 -v + echo "$list" | xargs git-mkdelta $max_depth $max_behind -v fi } +rev_list="" curr_file="" git-rev-list HEAD | -git-diff-tree -r -t --stdin | -awk '/^:/ { if ($5 == "M" || $5 == "N") print $4, $6; - if ($5 == "M") print $3, $6 }' | -LC_ALL=C sort -s -k 2 | uniq | -while read sha1 file; do - if [ "$file" == "$curr_file" ]; then - list="$list $sha1" - else - process_list - curr_file="$file" - list="" - head="$sha1" - fi +while true; do + # Let's batch revisions into groups of 1000 to give it a chance to + # scale with repositories containing long revision lists. We also + # overlap with the previous batch the size of mkdelta's look behind + # value in order to account for the processing discontinuity. + rev_list="$(echo -e -n "$rev_list" | tail --lines=$overlap)" + for i in $(seq 1000); do + read rev || break + rev_list="$rev_list$rev\n" + done + echo -e -n "$rev_list" | + git-diff-tree -r -t --stdin | + awk '/^:/ { if ($5 == "M") printf "%s %s\n%s %s\n", $4, $6, $3, $6 }' | + LC_ALL=C sort -s -k 2 | uniq | + while read sha1 file; do + if [ "$file" == "$curr_file" ]; then + list="$list $sha1" + else + process_list + curr_file="$file" + list="$sha1" + fi + done + [ "$rev" ] || break done process_list curr_file="root directory" -head="" list="$( git-rev-list HEAD | while read commit; do |