46 lines
1.4 KiB
Text
46 lines
1.4 KiB
Text
|
#!/bin/sh
|
||
|
|
|
||
|
|
# some git commands print to stdout, which would contaminate our JSON output
|
||
|
|
clean_git(){
|
||
|
|
git "$@" >&2
|
||
|
|
}
|
||
|
|
|
||
|
|
# Remove all remote branches, remove tags not reachable from HEAD, do a full
|
||
|
|
# repack and then garbage collect unreferenced objects.
|
||
|
|
make_deterministic_repo(){
|
||
|
|
local repo="$1"
|
||
|
|
|
||
|
|
# run in sub-shell to not touch current working directory
|
||
|
|
(
|
||
|
|
cd "$repo"
|
||
|
|
# Remove files that contain timestamps or otherwise have non-deterministic
|
||
|
|
# properties.
|
||
|
|
rm -rf .git/logs/ .git/hooks/ .git/index .git/FETCH_HEAD .git/ORIG_HEAD \
|
||
|
|
.git/refs/remotes/origin/HEAD .git/config
|
||
|
|
|
||
|
|
# Remove all remote branches.
|
||
|
|
git branch -r | while read -r branch; do
|
||
|
|
clean_git branch -rD "$branch"
|
||
|
|
done
|
||
|
|
|
||
|
|
# Remove tags not reachable from HEAD. If we're exactly on a tag, don't
|
||
|
|
# delete it.
|
||
|
|
maybe_tag=$(git tag --points-at HEAD)
|
||
|
|
git tag --contains HEAD | while read -r tag; do
|
||
|
|
if [ "$tag" != "$maybe_tag" ]; then
|
||
|
|
clean_git tag -d "$tag"
|
||
|
|
fi
|
||
|
|
done
|
||
|
|
|
||
|
|
# Do a full repack. Must run single-threaded, or else we lose determinism.
|
||
|
|
clean_git config pack.threads 1
|
||
|
|
clean_git repack -A -d -f
|
||
|
|
rm -f .git/config
|
||
|
|
|
||
|
|
# Garbage collect unreferenced objects.
|
||
|
|
# Note: --keep-largest-pack prevents non-deterministic ordering of packs
|
||
|
|
# listed in .git/objects/info/packs by only using a single pack
|
||
|
|
clean_git gc --prune=all --keep-largest-pack
|
||
|
|
)
|
||
|
|
}
|