src/lib/syslog/rust/bindgen.sh

#!/usr/bin/env bash

# Copyright 2022 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Determine paths for this script and its directory, and set $FUCHSIA_DIR.
readonly FULL_PATH="${BASH_SOURCE[0]}"
readonly SCRIPT_DIR="$(cd "$(dirname "${FULL_PATH}")" >/dev/null 2>&1 && pwd)"
source "${SCRIPT_DIR}/../../../../tools/devshell/lib/vars.sh"

set -eu

cd "${SCRIPT_DIR}"

readonly RELPATH="${FULL_PATH#${FUCHSIA_DIR}/}"
readonly BINDGEN="${PREBUILT_RUST_BINDGEN_DIR}/bindgen"

# Generate annotations for the top of the generated source file.
readonly RAW_LINES="// Copyright 2022 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Generated by ${RELPATH} using $("${BINDGEN}" --version)

use fuchsia_zircon::sys::{zx_handle_t, zx_status_t};
use usize as size_t;
"

readonly OUTPUT="src/syslog.rs"

tmp="$(mktemp --suffix=.h)"
for f in "${FUCHSIA_DIR}"/zircon/system/ulib/syslog/include/lib/syslog/{logger,global}.h; do
  # TODO(https://github.com/rust-lang/rust-bindgen/issues/316): Remove this sed
  # invocation when bindgen supports macros containing type casts.
  #
  # Note also that the outer parentheses are removed because bindgen doesn't
  # seem to support hex literals wrapped in parentheses.
  cat "${f}" | sed -E 's/(#define \w+) \(\(\w+_t\)(\w+)\)/\1 \2/g' >> "${tmp}"
done

"${BINDGEN}" \
    "${tmp}" \
    --disable-header-comment \
    --no-layout-tests \
    --raw-line "${RAW_LINES}" \
    --output "${OUTPUT}" \
    --allowlist-function 'fx_log_(reconfigure|get_logger)' \
    --allowlist-function 'fx_logger_((get|set)_min_severity|log|create|destroy|get_connection_status)' \
    --allowlist-type 'fx_log(ger)?_.+' \
    --allowlist-var 'FX_LOG_.+' \
    --blocklist-type 'zx_.+' \
    --blocklist-type '(__u?int\d+|size)_t' \
    --blocklist-item 'FX_LOG_(NONE|LEGACY_API_VERSION)' \
    --blocklist-item 'FX_LOG_MAX_TAG.+' \
    --blocklist-item 'FX_LOG_SEVERITY_(STEP_SIZE|MAX)' \
    -- \
    -I "${FUCHSIA_DIR}"/zircon/system/ulib/syslog/include \
    -I "${FUCHSIA_DIR}"/zircon/system/public

sed -i -E 's/(FX_LOG_(SEVERITY_(DEFAULT|MAX)|[A-Z]+)): u32 = /\1: fx_log_severity_t = /g' "${OUTPUT}"
sed -i -E 's/(FX_LOG_VERBOSITY_STEP_SIZE): u32 = /\1: u8 = /g' "${OUTPUT}"

fx format-code --files=${OUTPUT}