update: add leaf query

leaf

@@ -2,10 +2,10 @@
 set -e
 shopt -s inherit_errexit 2>/dev/null || true
 
-RED_COLOR="\e[1;31m"
+RED_COLOR=$"\e[1;31m"
-PURPLE_COLOR="\e[1;35m"
+PURPLE_COLOR=$"\e[1;35m"
-GREEN_COLOR="\e[1;32m"
+GREEN_COLOR=$'\e[1;32m'
-CLEAR_COLOR="\e[0m"
+CLEAR_COLOR=$'\e[0m'
 
 _DEF_PARALLEL_JOBS=4
 _ENV_PARALLEL_JOBS="${PARALLEL_JOBS}"
@@ -102,6 +102,11 @@ main() {
           leaf_unpack_package "${_item}"
         done
         ;;
+      query)
+        shift
+        [[ $# -eq 1 ]] || leaf_error "usage: leaf query <atom-or-name>"
+        leaf_query "$1"
+        ;;
       *)
         leaf_print_usage
         ;;
@@ -1002,6 +1007,40 @@ leaf_show_package() {
   echo -e "License: ${license[@]}\n"
 }
 
+leaf_query() {
+  local q="$1"
+  local trace_root="${TRACE_DIR:-/var/lib/leaf/trace}"
+
+  if ! leaf_find_remove_pkgbuild "$q"; then
+    leaf_error "${q} cannot found in the leaf installed database."
+  fi
+
+  local pkgbuild_path="${trace_root}/${PKG_PREFIX}/${PKG_NAME}/PKGBUILD"
+  [[ -f "$pkgbuild_path" ]] || leaf_error "query: missing PKGBUILD: $pkgbuild_path"
+  [[ -r "$pkgbuild_path" ]] || leaf_error "query: PKGBUILD not readable: $pkgbuild_path"
+
+  (
+    set -euo pipefail
+
+    unset pkgname pkgver
+
+    # shellcheck disable=SC1090
+    source "$pkgbuild_path"
+
+    local full="${PKG_PREFIX}/${PKG_NAME}"
+
+    if [[ -t 1 && -z "${NO_COLOR-}" ]]; then
+      local BOLD=$'\e[1m'
+      printf '%s%s%s %s %s%s%s\n' \
+        "${BOLD}" "${full}" "${CLEAR_COLOR}" \
+        "${pkgname}" \
+        "${GREEN_COLOR}" "${pkgver}" "${CLEAR_COLOR}"
+    else
+      printf '%s %s %s\n' "${full}" "${pkgname}" "${pkgver}"
+    fi
+  )
+}
+
 leaf_pack_package() {
   leaf_build_package
   pushd "${srcdir}" > /dev/null 2>&1