Re: [PATCH 2/2] filter-branch: fail gracefully when a filter fails

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Johannes Schindelin wrote:
> -       sed -e '1,/^$/d' <../commit | \
> -               eval "$filter_msg" | \
> -               sh -c "$filter_commit" "git commit-tree" $(git write-tree) \
> -                       $parentstr > ../map/$commit
> +       (sed -e '1,/^$/d' <../commit |
> +               (eval "$filter_msg" ||
> +                die "msg filter failed: $filter_msg" 2>&3) |
> +               (sh -c "$filter_commit" "git commit-tree" $(git write-tree) \
> +                       $parentstr > ../map/$commit ||
> +                die "commit filter failed: $filter_commit" 2>&3)) 3>&1 |
> +        grep . && die

You introduce a handful of new forks and an exec. Isn't an intermediate
file much cheaper?

-- Hannes

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