git-cache-meta

#!/bin/sh -e

# git-cache-meta -- file owner and permissions caching.
# Based on the solution proposed by <jidanni @ jidanni.org> found at
# http://thread.gmane.org/gmane.comp.version-control.git/104971/focus=105133


IFS=$'\n' # avoid problems when finding spaces in file names

: ${GIT_CACHE_META_FILE=.git_cache_meta}

list_dirs() {
    for D in $(git ls-files | /bin/grep -F "/" | sed -r "s/\/[^\/]+$//g" | sort -u);
    do
        if [[ "$D" =~ "/" ]]; then
            while [[ "$D" =~ "/" ]]; do
                echo "$D"
                D="$(echo "$D" | sed -r "s/\/[^\/]+$//g")"
            done
        else
            echo "$D"
        fi
    done | sort -u | xargs -I '{}' find '{}' -type d -prune \
        \( -printf 'chown %U:%G "%p/"\n' \) \
        \( -printf 'chmod %#m "%p/"\n' \) \
        \( -printf 'touch -c -h -m -d "%TY-%Tm-%Td %TH:%TM:%TS %Tz" "%p/"\n' \);
}


list_files() {
    git ls-files -z | xargs -0r -I '{}' find '{}' \
        \( -printf 'chown %U:%G "%p"\n' \) \
        \( -printf 'chmod %#m "%p"\n' \) \
        \( -printf 'touch -c -h -m -d "%TY-%Tm-%Td %TH:%TM:%TS %Tz" "%p"\n' \);
}



case $@ in
    --store|--stdout)
        case $1 in --store) exec > $GIT_CACHE_META_FILE; esac
        list_dirs; list_files;;

    --apply) sh -e $GIT_CACHE_META_FILE;;

    *) 1>&2 cat <<EOF; exit 1;;
Usage: $0 --store|--stdout|--apply

# Storage file: ${GIT_CACHE_META_FILE}
#
# Example:
# In your local git repo:
#   git bundle create mybundle.bdl master
#   git-cache-meta --store
#   scp mybundle.bdl .git_cache_meta machine2
# Then on machine2:
#   git init
#   git pull mybundle.bdl master
#   git-cache-meta --apply
EOF
esac