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#!/usr/bin/env bash
# Validate every generated EPUB.
#
# 1. epubcheck — official EPUB3 conformance (always, required on PATH).
# 2. kindlegen — Amazon's converter, the engine behind "Send to Kindle".
# Optional but recommended: epubcheck does NOT catch the
# Kindle-specific issues that cause "E999" delivery failures.
#
# epubcheck: brew install epubcheck
# kindlegen: bundled inside Kindle Previewer 3 at
# ".../Kindle Previewer 3.app/Contents/lib/fc/bin/kindlegen".
# Put it on PATH or point KINDLEGEN at it to enable the Kindle check.
#
# Exits non-zero if any EPUB fails a check, so it can gate CI.
set -uo pipefail
if ! command -v epubcheck >/dev/null 2>&1; then
echo "error: epubcheck not found. Install it (e.g. 'brew install epubcheck')." >&2
exit 127
fi
KINDLEGEN="${KINDLEGEN:-$(command -v kindlegen 2>/dev/null || true)}"
shopt -s nullglob
epubs=(epubs/*.epub)
if [ ${#epubs[@]} -eq 0 ]; then
echo "error: no EPUBs in epubs/. Run 'zig build run' first." >&2
exit 1
fi
fail=0
for f in "${epubs[@]}"; do
ok=1
if ! epubcheck "$f" >/dev/null 2>&1; then
ok=0
echo "FAIL (epubcheck) $f"
epubcheck "$f" 2>&1 | grep -E '^(ERROR|FATAL)' | sed 's/^/ /'
fi
if [ -n "$KINDLEGEN" ]; then
# kindlegen writes output next to the input; -o takes a bare filename.
out=$("$KINDLEGEN" "$f" -o "$(basename "${f%.epub}").mobi" 2>&1)
rm -f "${f%.epub}.mobi"
if echo "$out" | grep -q "could not be generated"; then
ok=0
echo "FAIL (kindlegen) $f"
echo "$out" | grep -E '^Error|E[0-9]{4,}' | sed 's/^/ /'
fi
fi
if [ $ok -eq 1 ]; then echo "PASS $f"; else fail=1; fi
done
[ -z "$KINDLEGEN" ] && echo "note: kindlegen not found; ran epubcheck only (set KINDLEGEN to also test Kindle conversion)." >&2
exit $fail
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