| #!/bin/bash |
| # Copyright 2020 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. |
| |
| function get_host_tools_dir { |
| local -r build_dir="$(fx-build-dir-if-present && echo "${FUCHSIA_BUILD_DIR}")" |
| local -r host_tools="${build_dir}/host-tools" |
| if [[ -d "${build_dir}" && -d "${host_tools}" ]]; then |
| echo "${host_tools}" |
| fi |
| } |
| |
| function get_exec_from_metadata { |
| local -r metadata_file=$1 |
| |
| export PREBUILT_3P_DIR FUCHSIA_DIR HOST_PLATFORM |
| export HOST_TOOLS_DIR="$(get_host_tools_dir)" |
| |
| awk -F ' *= *' -f - "${metadata_file}" <<'EOF' |
| /^#### +EXECUTABLE */ { |
| gsub(/\${PREBUILT_3P_DIR}/, ENVIRON["PREBUILT_3P_DIR"], $2); |
| gsub(/\${FUCHSIA_DIR}/, ENVIRON["FUCHSIA_DIR"], $2); |
| gsub(/\${HOST_TOOLS_DIR}/, ENVIRON["HOST_TOOLS_DIR"], $2); |
| gsub(/\${HOST_PLATFORM}/, ENVIRON["HOST_PLATFORM"], $2); |
| print $2; |
| } |
| EOF |
| } |
| |
| function _relative { |
| cmd="$1" |
| if [[ "${cmd}" == *"${FUCHSIA_DIR}"* ]]; then |
| echo "//${cmd#${FUCHSIA_DIR}/}" |
| else |
| echo "${cmd}" |
| fi |
| } |
| |
| function find_executable { |
| local cmd_name="$1" |
| local cmd_path |
| cmd_path="$(commands "${cmd_name}")" |
| # no metadata, so let's try to find the file |
| if [[ -z "${cmd_path}" ]]; then |
| # no file in regular script directories, look in host_tools |
| cmd_path="$(find_host_tools "${cmd_name}")" |
| fi |
| # If multiple commands match, use the first one |
| echo "$(find_exec_from_path "${cmd_path}" | head -1)" |
| } |
| |
| function find_exec_from_path { |
| local cmd_path="$1" |
| cmd_path="${cmd_path%.fx}" |
| local fx_file_path="${cmd_path}.fx" |
| if [[ ! -f "${fx_file_path}" ]]; then |
| # no metadata, so let's try to find the file |
| echo "${cmd_path}" |
| if [[ ! -x "${cmd_path}" ]]; then |
| return 1 |
| fi |
| else |
| # there's metadata |
| local from_metadata="$(get_exec_from_metadata "${fx_file_path}")" |
| |
| if [[ -n "${from_metadata}" ]]; then |
| # EXECUTABLE is defined in the metadata, use it |
| echo "${from_metadata}" |
| if [[ -f "${cmd_path}" && ! "${cmd_path}" -ef "${from_metadata}" ]]; then |
| fx-error "Invalid ${fx_file_path}: if both ${basename_exec} and EXECUTABLE metadata exist, they must point to the same file" |
| return 1 |
| fi |
| else |
| # no EXECUTABLE in the metadata, so return the cmd_path itself |
| echo "${cmd_path}" |
| if [[ ! -x "${cmd_path}" ]]; then |
| return 1 |
| fi |
| fi |
| fi |
| } |
| |
| function find_execs_and_metadata { |
| local cmd_name=$1 |
| shift |
| |
| if [[ -z "${cmd_name}" ]]; then |
| cmd_name="*" |
| fi |
| local dirs=() |
| for d in "$@"; do |
| if [[ -d "${d}" ]]; then |
| dirs+=( "${d}" ) |
| fi |
| done |
| if [[ ${#dirs[@]} -eq 0 ]]; then |
| return 0 |
| fi |
| |
| # run find assuming "-executable" is supported |
| cmds="$( find "${dirs[@]}" -maxdepth 1 -type f \ |
| \( -executable -name "${cmd_name}" \) -o \ |
| \( -name "${cmd_name}.fx" \) 2>/dev/null )" |
| |
| if [[ $? -ne 0 ]]; then |
| # assume that the error was caused because versions of find older than 4.3.0 |
| # don't support -executable. Run with -perm +100 instead, which is not |
| # supported in versions of find newer than 4.5.12, so it can't be used always. |
| cmds="$( find "${dirs[@]}" -maxdepth 1 -type f \ |
| \( -perm +100 -name "${cmd_name}" \) -o \ |
| \( -name "${cmd_name}.fx" \) 2>/dev/null )" |
| if [[ $? -ne 0 ]]; then |
| { |
| echo "ERROR: 'find' failed unexpectedly, please execute fx with '-x' and report a bug." |
| echo "At least one of the commands below was expected to work:" |
| echo 'find ' "${dirs[@]}" '-maxdepth 1 -type f \( -executable -name' "\"${cmd_name}\"" '\) -o \( -name ' "\"${cmd_name}.fx\"" '\)' |
| echo 'find ' "${dirs[@]}" '-maxdepth 1 -type f \( -perm +100 -name' "\"${cmd_name}\"" '\) -o \( -name ' "\"${cmd_name}.fx\"" '\)' |
| } >&2 |
| exit 1 |
| fi |
| fi |
| sort -u <<< "${cmds}" |
| } |
| |
| |
| function find_host_tools { |
| local cmd_name=$1 |
| local -r host_tools="$(get_host_tools_dir)" |
| if [[ -z "${host_tools}" ]]; then |
| return |
| fi |
| # get a list of non-host-tools commands and metadata files, separated by |
| # semi-colon. |
| cmds="$(commands | tr '\n' ';')" |
| |
| binaries=() |
| # do not list a host tool if there's a subcommand script or an .fx metadata |
| # file with the same name. |
| for binary in $(find_execs_and_metadata "${cmd_name}" "${host_tools}"); do |
| name="${binary##*/}" # remove path, equivalent to basename but faster |
| # only return the binary if no {binary} or {binary}.fx as other commands |
| if [[ "${cmds}" != */${name}.fx\;* && "${cmds}" != */${name}\;* ]]; then |
| binaries+=( "${binary}" ) |
| fi |
| done |
| echo "${binaries[@]}" |
| } |
| |
| |
| function commands { |
| local cmd_name=${1:-} |
| local dirs |
| # handle "vendor VENDOR COMMAND" |
| if [[ "${cmd_name}" == "vendor" && $# -eq 3 ]]; then |
| vendor=$2 |
| cmd_name=$3 |
| dirs=("${FUCHSIA_DIR}"/vendor/${vendor}/scripts/devshell) |
| # handle "vendor VENDOR" |
| elif [[ "${cmd_name}" == "vendor" && $# -eq 2 ]]; then |
| vendor=$2 |
| cmd_name="" |
| dirs=("${FUCHSIA_DIR}"/vendor/${vendor}/scripts/devshell) |
| else |
| dirs=("${FUCHSIA_DIR}"/tools/devshell{,/contrib} "${FUCHSIA_DIR}"/vendor/*/scripts/devshell) |
| fi |
| |
| find_execs_and_metadata "${cmd_name}" "${dirs[@]}" |
| } |