#!/usr/bin/env bash
#
# Use nightly rustdoc to make sure that the expected list of APIs is exported
# from the `arti` crate when built with --features=full.
#
# Requires jq and diff.

set -eou pipefail

EXPECTED_PUBLIC_MEMBERS=$(cat <<EOF
arti
arti.main
EOF
)

JSONFILE=target/doc/arti.json

export RUSTDOCFLAGS='-Z unstable-options --output-format json'
: "${CARGO:=cargo +nightly}"

${CARGO} doc --no-deps -p arti --features=full

if ! test -e "$JSONFILE"; then
   echo "Problem: $JSONFILE was not created by $CARGO doc"
   exit 1
fi


TEMPDIR=$(mktemp -d)
trap 'rm -rf "$TEMPDIR"' 0

jq -r '.paths[] | select(.crate_id == 0) | .path | join(".") ' <"$JSONFILE" |sort >"$TEMPDIR/public_paths"

echo "$EXPECTED_PUBLIC_MEMBERS" >"$TEMPDIR/expected_public_paths"

if diff -u "$TEMPDIR/expected_public_paths" "$TEMPDIR/public_paths"; then
    echo "No changes; all public APIs in arti are as expected"
    exit 0
else
    echo "List of public APIs in arti crate are not as expected!" >&2
    echo "(See above for diff from expected)" >&2
    exit 1
fi