#!/usr/bin/env bash

# Semantic deploy-trigger tokenizer. Parses the FIRST LINE of COMMIT_MSG against

# the grammar `(build): <domain> [<domain> ...] [no-deploy]` and emits the active

# domain set + flags to GITHUB_OUTPUT. Single source of truth for all deploy gating.

set -uo pipefail

COMMIT_MSG="${COMMIT_MSG:-}"

FIRST_LINE="$(printf '%s\n' "${COMMIT_MSG}" | head -1)"

# Trim leading/trailing whitespace.

FIRST_LINE="${FIRST_LINE#"${FIRST_LINE%%[![:space:]]*}"}"

FIRST_LINE="${FIRST_LINE%"${FIRST_LINE##*[![:space:]]}"}"

emit() { # key value

[ -n "${GITHUB_OUTPUT:-}" ] && printf '%s=%s\n' "$1" "$2" >> "${GITHUB_OUTPUT}"

printf '%s=%s\n' "$1" "$2"

}

emit_all() { # triggered domains has_back has_front has_obs has_uk app_pipeline no_deploy app_deploy skip_app_ci

emit triggered "$1"; emit domains "$2"

emit has_back "$3"; emit has_front "$4"; emit has_observability "$5"; emit has_uptime_kuma "$6"

emit app_pipeline "$7"; emit no_deploy "$8"; emit app_deploy "$9"; emit skip_app_ci "${10}"

}

fail() { # message

echo "::error::$1"

emit_all false "" false false false false false false false false

exit 1

}

# Not an attempted trigger at all -> normal commit (exit 0).

case "${FIRST_LINE}" in

'(build)'*) : ;; # attempted trigger -> validate strictly

*) emit_all false "" false false false false false false false false; exit 0 ;;

esac

# Strict prefix: literal "(build): " (colon + single space).

case "${FIRST_LINE}" in

'(build): '*) REST="${FIRST_LINE#'(build): '}" ;;

'(build):') emit_all false "" false false false false false false false false; exit 0 ;; # empty -> no-op

*) fail "malformed deploy trigger (need '(build): ' with a colon and single space): ${FIRST_LINE}" ;;

esac

# Empty token list after the prefix -> no-op normal commit.

[ -n "${REST}" ] || { emit_all false "" false false false false false false false false; exit 0; }

# Reject any separator that is not a single space (tabs / double spaces / commas / slashes).

case "${REST}" in

*$'\t'*|*' '*|*','*|*'/'*) fail "tokens must be single-space separated (no commas, slashes, tabs, or double spaces): ${REST}" ;;

esac

has_back=false; has_front=false; has_obs=false; has_uk=false; no_deploy=false

for tok in ${REST}; do

case "${tok}" in

back) has_back=true ;;

front) has_front=true ;;

observability) has_obs=true ;;

uptime-kuma) has_uk=true ;;

no-deploy) no_deploy=true ;;

*) fail "unknown build domain '${tok}' (allowed: back front observability uptime-kuma no-deploy)" ;;

esac

done

app_pipeline=false

{ [ "${has_back}" = true ] || [ "${has_front}" = true ]; } && app_pipeline=true

# no-deploy validation.

if [ "${no_deploy}" = true ]; then

[ "${app_pipeline}" = true ] || fail "'no-deploy' requires at least one app domain (back/front)"

{ [ "${has_obs}" = true ] || [ "${has_uk}" = true ]; } && fail "'no-deploy' cannot be combined with observability/uptime-kuma"

fi

# Canonical-ordered domain string.

domains=""

[ "${has_back}" = true ] && domains="${domains} back"

[ "${has_front}" = true ] && domains="${domains} front"

[ "${has_obs}" = true ] && domains="${domains} observability"

[ "${has_uk}" = true ] && domains="${domains} uptime-kuma"

domains="${domains# }"

app_deploy=false

{ [ "${app_pipeline}" = true ] && [ "${no_deploy}" = false ]; } && app_deploy=true

skip_app_ci=false

{ [ "${app_pipeline}" = false ]; } && skip_app_ci=true # triggered here is always true at this point

emit_all true "${domains}" "${has_back}" "${has_front}" "${has_obs}" "${has_uk}" "${app_pipeline}" "${no_deploy}" "${app_deploy}" "${skip_app_ci}"

echo "✅ trigger: domains=[${domains}] app_deploy=${app_deploy} skip_app_ci=${skip_app_ci}"

exit 0