add mtime-to-git script to pull more correct mtimes out of git

[ikiwiki] / mtime-to-git

#!/bin/sh
# Sets mtimes of all files in the tree their last change date
# based on git's log. Useful to avoid too new dates after a
# fresh checkout, which lead to ikiwiki unnecessarily rebuilding
# basewiki files on upgrade.
if [ -d .git ]; then
        for file in $(git ls-files); do
                date="$(git log -1 --date=rfc "$file" | grep ^Date: | sed -e 's/Date://')"
                if [ -n "$date" ]; then
                        echo "$date $file"
                        touch -d"$date" $file
                fi
        done
fi