#!/bin/sh
# Creates (or updates) the Gitea release for a tag and uploads what deploy/build.sh made.
#
#   TOKEN=<access token that can write releases> deploy/publish-release.sh v0.2.0
#
# In Gitea Actions GITHUB_SERVER_URL and GITHUB_REPOSITORY are already set. Safe to
# re-run: an existing release is reused and assets with the same name are replaced.
set -eu
TAG=${1:?usage: publish-release.sh <tag>}
: "${TOKEN:?set TOKEN to a Gitea access token that can write releases}"
SERVER=${GITHUB_SERVER_URL:-${GITEA_SERVER_URL:-https://git.veillax.com}}
REPO=${GITHUB_REPOSITORY:-Veillax/Spinner}
API="$SERVER/api/v1/repos/$REPO"
AUTH="Authorization: token $TOKEN"

# a JSON helper without needing jq: any python will do
PY=python3
python3 -c 'pass' > /dev/null 2>&1 || PY=python
json() { "$PY" -c "$1"; }

# release notes: the commit subjects since the previous tag
prev=$(git describe --tags --abbrev=0 "$TAG^" 2>/dev/null || true)
if [ -n "$prev" ]; then
	notes=$(git log --pretty='format:- %s' "$prev..$TAG")
else
	notes=$(git log --pretty='format:- %s' "$TAG")
fi
prerelease=false
case "$TAG" in *-*) prerelease=true ;; esac

body=$(NOTES="$notes" TAG="$TAG" PRE="$prerelease" json '
import json, os
print(json.dumps({"tag_name": os.environ["TAG"], "name": os.environ["TAG"], "body": os.environ["NOTES"],
                  "draft": False, "prerelease": os.environ["PRE"] == "true"}))')

# reuse the release when a failed job is re-run
id=$(curl -fsS -H "$AUTH" "$API/releases/tags/$TAG" 2>/dev/null | json 'import sys, json; print(json.load(sys.stdin)["id"])' 2>/dev/null || true)
if [ -z "$id" ]; then
	echo "creating release $TAG"
	id=$(curl -fsS -X POST -H "$AUTH" -H 'Content-Type: application/json' -d "$body" "$API/releases" | json 'import sys, json; print(json.load(sys.stdin)["id"])')
else
	echo "release $TAG already exists (id $id): replacing its files"
fi

# the ids of the release's assets with a given name (a failed upload can leave a partial one behind)
asset_ids() {
	curl -fsS -H "$AUTH" "$API/releases/$id/assets" | "$PY" -c 'import sys, json
for a in json.load(sys.stdin):
    if a["name"] == sys.argv[1]:
        print(a["id"])' "$1"
}

for f in dist/*.tar.gz dist/*.zip dist/SHA256SUMS; do
	[ -f "$f" ] || continue
	name=$(basename "$f")
	n=1
	while :; do
		for aid in $(asset_ids "$name"); do
			curl -fsS -X DELETE -H "$AUTH" "$API/releases/$id/assets/$aid" > /dev/null
		done
		echo "uploading $name (attempt $n)"
		if curl -fsS --max-time 1200 -X POST -H "$AUTH" -F "attachment=@$f" "$API/releases/$id/assets?name=$name" > /dev/null; then
			break
		fi
		# large uploads can hit a proxy timeout (HTTP 502); try again
		[ "$n" -lt 5 ] || { echo "giving up on $name after $n attempts" >&2; exit 1; }
		n=$((n + 1))
		sleep $((n * 10))
	done
done
echo "published $SERVER/$REPO/releases/tag/$TAG"