#!/usr/bin/env bash
# Every cache-bust stamp web/assemble.sh writes must be readable back.
#
# Usage: scripts/assemble-stamp.sh FILE PATTERN [FILE PATTERN ...]
#
# It RECORDS every miss and fails once at the end, naming all of them. Exiting
# on the first named one file and never reached the rest, so a shape change
# that broke two stamps cost two wasm-pack rebuilds to diagnose -- the slowest
# loop in this repo (improvise-x4wv).
#
# It lives here rather than inside assemble.sh because the gate is the whole
# guard and deleting it was invisible: both misses still printed and the
# assembly exited 0 (improvise-w8ih). Exercising it in assemble.sh would need a
# fabricated web/pkg, which is a second answer to "what does the site assemble
# from"; exercising it here needs nothing. scripts/assemble-stamp-test.sh is
# the check_the_checker, and CI runs it.
set -eu

test $# -ge 2 || { echo "usage: assemble-stamp.sh FILE PATTERN [FILE PATTERN ...]" >&2; exit 2; }
test $((($# % 2))) -eq 0 || { echo "assemble-stamp: FILE and PATTERN come in pairs" >&2; exit 2; }

missing=""
while [ $# -ge 2 ]; do
  file=$1
  pattern=$2
  shift 2
  # -F, because every pattern is a literal and `.` as "any character" would
  # let a corrupted stamp match -- a pass in the direction that looks like one.
  if [ -f "$file" ] && grep -qF "$pattern" "$file"; then
    grep -nF "$pattern" "$file"
  else
    echo "assemble: $file is missing the cache-bust stamp: $pattern" >&2
    missing="${missing} $file"
  fi
done

test -z "$missing" || {
  echo "assemble: refusing to ship; unstamped:${missing}" >&2
  exit 1
}