e16b38b6ac
This patch provides further details related to importing stable branches, as well as how to deal with backports. Partially-implements: blueprint core-vendor-decomposition Change-Id: I4ccde019ee9d86a93a956e42b866ff9b2dc5aedb
110 lines
2.9 KiB
Bash
Executable File
110 lines
2.9 KiB
Bash
Executable File
#!/bin/sh
|
|
#
|
|
# This script has been shamelessly copied and tweaked from original copy:
|
|
#
|
|
# https://github.com/openstack/oslo-incubator/blob/master/tools/graduate.sh
|
|
#
|
|
# Use this script to export a Neutron module to a separate git repo.
|
|
#
|
|
# You can call this script Call script like so:
|
|
#
|
|
# ./split.sh <path to file containing list of files to export> <project name>
|
|
#
|
|
# The file should be a text file like the one below:
|
|
#
|
|
# /path/to/file/file1
|
|
# /path/to/file/file2
|
|
# ...
|
|
# /path/to/file/fileN
|
|
#
|
|
# Such a list can be generated with a command like this:
|
|
#
|
|
# find $path -type f # path is the base dir you want to list files for
|
|
|
|
set -e
|
|
|
|
if [ $# -lt 2 ]; then
|
|
echo "Usage $0 <path to file containing list of files to export> <project name>"
|
|
exit 1
|
|
fi
|
|
|
|
set -x
|
|
|
|
file_list_path="$1"
|
|
project_name="$2"
|
|
files_to_keep=$(cat $file_list_path)
|
|
|
|
|
|
# Build the grep pattern for ignoring files that we want to keep
|
|
keep_pattern="\($(echo $files_to_keep | sed -e 's/^/\^/' -e 's/ /\\|\^/g')\)"
|
|
# Prune all other files in every commit
|
|
pruner="git ls-files | grep -v \"$keep_pattern\" | git update-index --force-remove --stdin; git ls-files > /dev/stderr"
|
|
|
|
# Find all first commits with listed files and find a subset of them that
|
|
# predates all others
|
|
|
|
roots=""
|
|
for file in $files_to_keep; do
|
|
file_root="$(git rev-list --reverse HEAD -- $file | head -n1)"
|
|
fail=0
|
|
for root in $roots; do
|
|
if git merge-base --is-ancestor $root $file_root; then
|
|
fail=1
|
|
break
|
|
elif !git merge-base --is-ancestor $file_root $root; then
|
|
new_roots="$new_roots $root"
|
|
fi
|
|
done
|
|
if [ $fail -ne 1 ]; then
|
|
roots="$new_roots $file_root"
|
|
fi
|
|
done
|
|
|
|
# Purge all parents for those commits
|
|
|
|
set_roots="
|
|
if [ 1 -eq 0 $(for root in $roots; do echo " -o \"\$GIT_COMMIT\" = '$root' "; done) ]; then
|
|
echo '';
|
|
else
|
|
cat;
|
|
fi"
|
|
|
|
# Enhance git_commit_non_empty_tree to skip merges with:
|
|
# a) either two equal parents (commit that was about to land got purged as well
|
|
# as all commits on mainline);
|
|
# b) or with second parent being an ancestor to the first one (just as with a)
|
|
# but when there are some commits on mainline).
|
|
# In both cases drop second parent and let git_commit_non_empty_tree to decide
|
|
# if commit worth doing (most likely not).
|
|
|
|
skip_empty=$(cat << \EOF
|
|
if [ $# = 5 ] && git merge-base --is-ancestor $5 $3; then
|
|
git_commit_non_empty_tree $1 -p $3
|
|
else
|
|
git_commit_non_empty_tree "$@"
|
|
fi
|
|
EOF
|
|
)
|
|
|
|
# Filter out commits for unrelated files
|
|
echo "Pruning commits for unrelated files..."
|
|
git filter-branch \
|
|
--index-filter "$pruner" \
|
|
--parent-filter "$set_roots" \
|
|
--commit-filter "$skip_empty" \
|
|
--tag-name-filter cat \
|
|
-- --all
|
|
|
|
# Generate the new .gitreview file
|
|
echo "Generating new .gitreview file..."
|
|
cat > .gitreview <<EOF
|
|
[gerrit]
|
|
host=review.openstack.org
|
|
port=29418
|
|
project=stackforge/${project_name}.git
|
|
EOF
|
|
|
|
git add . && git commit -m "Generated new .gitreview file for ${project_name}"
|
|
|
|
echo "Done."
|