git-cache-meta.sh

#!/bin/sh -e
# git-cache-meta -- file meta data caching for possible use with
# git-bundle, git-fast-export, git-archive, hooks, as a simple
# alternative to etckeeper, metastore, setgitperms. Requires GNU Find.
#
# original version by jidanni: https://marc.info/?l=git&m=123146944027390
# some modifications borrowed from this thread: https://gist.github.com/andris9/1978266
# features:
# - works only on MacOS X with GNU find (brew install findutils)
# - save all files and directories metadata except access time

: ${GIT_CACHE_META_FILE=.git_cache_meta}
case $@ in
    --store|--stdout)
    case $1 in --store) exec > $GIT_CACHE_META_FILE; esac
    # directories
    git ls-tree --name-only -rd $(git write-tree) | xargs -I NAME gfind ./NAME -maxdepth 0 \
        \( -printf "chown -h '%u':'%g' '%p'\n" \) , \
        \( \! -type l -printf "chmod %#m '%p'\n" \) , \
        \( -printf "touch -hct '%TY%Tm%Td%TH%TM' '%p'\n" \)
    # files
    git ls-files | xargs -I NAME gfind ./NAME \
        \( -printf "chown -h '%u':'%g' '%p'\n" \) , \
        \( \! -type l -printf "chmod %#m '%p'\n" \) , \
        \( -printf "touch -hct '%TY%Tm%Td%TH%TM' '%p'\n" \);;
    --apply) sh -e ${GIT_CACHE_META_FILE};;
    *) 1>&2 echo "Usage: $0 --store|--stdout|--apply"; exit 1;;
esac