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#!/bin/bash
# Reset
Color_Off='\033[0m' # Text Reset
# Regular Colors
Black='\033[0;30m' # Black
Red='\033[0;31m' # Red
Green='\033[0;32m' # Green
Yellow='\033[0;33m' # Yellow
Blue='\033[0;34m' # Blue
Purple='\033[0;35m' # Purple
Cyan='\033[0;36m' # Cyan
White='\033[0;37m' # White
# Bold
BBlack='\033[1;30m' # Black
BRed='\033[1;31m' # Red
BGreen='\033[1;32m' # Green
BYellow='\033[1;33m' # Yellow
BBlue='\033[1;34m' # Blue
BPurple='\033[1;35m' # Purple
BCyan='\033[1;36m' # Cyan
BWhite='\033[1;37m' # White
# Background
On_Black='\033[40m' # Black
On_Red='\033[41m' # Red
On_Green='\033[42m' # Green
On_Yellow='\033[43m' # Yellow
On_Blue='\033[44m' # Blue
On_Purple='\033[45m' # Purple
On_Cyan='\033[46m' # Cyan
On_White='\033[47m' # White
info () {
echo -e "${Cyan}INFO:${Color_Off} $1"
}
fail() {
echo -e "${Red}ERROR:${Color_Off} $1"
exit $2
}
if [ $# -ne 3 ]; then
echo -e "${BRed}Usage `basename $0` <origin repo> <path to filter to> <new_repo_location>${Color_Off}"
echo
echo "NOTE: origin repo must be a full path if used locally"
exit 1;
fi
origin_repo=${1}
path_to_filter_to=${2}
new_repo_location=${3}
new_repo_parent=`dirname ${new_repo_location}`
mkdir -p ${new_repo_parent}
info "Cloning ${origin_repo} to ${new_repo_location}"
git clone --no-hardlinks -q --progress $origin_repo $new_repo_location || fail "Unable to clone" 2
cd ${new_repo_location}
info "Filter branch down to ${path_to_filter_to}"
git filter-branch --prune-empty --subdirectory-filter ${path_to_filter_to} --tag-name-filter cat -- --all 2>&1 | tee filtered_branches.txt || fail "Unable to filter branches" 3
info "Remove branches that are irrelevant"
cat filtered_branches.txt | grep WARNING | awk '{print $3}' | xargs -n 1 git update-ref -d
rm filtered_branches.txt
info "Deleting old refs"
git for-each-ref --format="%(refname)" refs/original/ | xargs -n 1 git update-ref -d || fail "Unable to delete old refs" 4
info "Removing cruft"
git reflog expire --expire=now --all
git gc --prune=now
info "Repo size: ${du -h -d 0 .}"
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