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-rwxr-xr-xgit-deltafy-script50
1 files changed, 32 insertions, 18 deletions
diff --git a/git-deltafy-script b/git-deltafy-script
index 21a9569..476d879 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