#!/bin/sh
# hack/seed/run-translations.sh <rastrillo checkout> <commit>
#
# Carries the gallery's translations from rastrillo at the commit. It
# dumps every English string the gallery says, with its id, through
# go run ./hack/seed/english, then runs the translation exporter inside
# a scratch rastrillo worktree at the commit. The exporter matches each
# string byte for byte against the gallery's prose and sample tables and
# the framework's locale catalogs, writes the hits into
# internal/gallery/i18n/, keeps the drafts i18n/drafts.json vouches for,
# and lists the rest in hack/seed/translations-todo.json for drafting.
#
# The worktree and the English dump go under $TMPDIR, which must be
# set: this runs on a shared machine, and /tmp is not scratch there. A
# worktree already at that path belongs to another run and is left
# alone. Once this run has made its own, the trap removes it, the
# copied file and the dump whether the run passed, failed or was
# interrupted.
#
#   hack/seed/run-translations.sh ~/src/rastrillo 5bb38c0ab31b9e3f5a698c61d73161cd1246471f
set -eu

if [ $# -ne 2 ]; then
	echo "usage: $0 <rastrillo checkout> <commit>" >&2
	exit 2
fi
if [ -z "${TMPDIR:-}" ]; then
	echo "run-translations.sh: TMPDIR is unset; set it to scratch space on disk, not /tmp" >&2
	exit 2
fi
checkout=$1
commit=$2
here=$(cd "$(dirname "$0")" && pwd)
fiesta=$(cd "$here/../.." && pwd)
wt="$TMPDIR/rastrillo-translations"

if [ -e "$wt" ]; then
	echo "run-translations.sh: $wt already exists; another run may be using it. Remove it by hand if not." >&2
	exit 1
fi

scratch=$(mktemp -d "$TMPDIR/fiesta-english.XXXXXX")
# cleanup runs from the EXIT trap. It keeps the run's own exit status,
# and a worktree that could not be removed is reported and makes the
# run fail rather than being hidden; prune runs either way.
added=
cleanup() {
	status=$?
	rm -rf "$scratch"
	if [ -n "$added" ]; then
		rm -f "$wt/internal/designsystem/translations_fiestaseed_test.go"
		if ! git -C "$checkout" worktree remove --force "$wt"; then
			echo "run-translations.sh: could not remove the scratch worktree $wt; remove it by hand" >&2
			if [ "$status" -eq 0 ]; then
				status=1
			fi
		fi
		git -C "$checkout" worktree prune
	fi
	exit "$status"
}
trap cleanup EXIT
# A signal exits, and the EXIT trap then cleans up.
trap 'exit 130' INT TERM

(cd "$fiesta" && go run ./hack/seed/english -out "$scratch/english.json")

git -C "$checkout" worktree add --detach "$wt" "$commit"
added=1
cp "$here/_rastrillo/translations_fiestaseed_test.go" "$wt/internal/designsystem/"

cd "$wt"
GOFLAGS=-mod=mod FIESTA_SEED_OUT="$fiesta" FIESTA_ENGLISH="$scratch/english.json" go test -tags fiestaseed -run '^TestFiestaTranslations$' ./internal/designsystem/ -count=1 -v