git-bzr-number.sh

#!/bin/sh
# For repositories cloned using `git-remote-bzr` (the official one),
# convert a git commit hash to the bzr hash *and* revno.
set -e

die()
{
    printf '%s\n' "$1" >&2
    exit 1
}

case "$#" in
    0) what=HEAD;;
    1) what="$1";;
    *) die 'Error: too many arguments';;
esac
case "$what" in
    -*) die "Usage: $0 [git-revision]";;
esac
cd "$(git rev-parse --git-dir)"
what="$(git rev-parse "$what")"
mark="$(cat bzr/origin/marks-git | grep ' '"$what"'$' | sed 's/^://;s/ .*$//')"
bzr_id="$(cat bzr/origin/marks-int | jq --raw-output --argjson mark "$mark" '
    .marks
    | to_entries
    | map(select(.value == $mark))
    | .[0].key
')"
echo "$bzr_id"
bzr revno bzr/origin/clone/master/.bzr -r "$bzr_id"