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136 lines
3.5 KiB
136 lines
3.5 KiB
# Copyright 2019 The Pigweed Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may not
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# use this file except in compliance with the License. You may obtain a copy of
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# the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations under
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# the License.
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import("python_action.gni")
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# Runs a program which isn't in Python.
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#
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# This is provided to avoid having to write a new Python wrapper script every
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# time a program needs to be run from GN.
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#
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# Args:
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# program: The program to run. Can be a full path or just a name (in which case
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# $PATH is searched).
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#
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# args: Optional list of arguments to the program.
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#
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# deps: Dependencies for this target.
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#
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# inputs: Optional list of build inputs to the program.
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#
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# outputs: Optional list of artifacts produced by the program's execution.
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#
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# env: Optional list of key-value pairs defining environment variables for
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# the program.
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#
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# env_file: Optional path to a file containing a list of newline-separated
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# key-value pairs defining environment variables for the program.
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#
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# args_file: Optional path to a file containing additional positional arguments
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# to the program. Each line of the file is appended to the invocation. Useful
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# for specifying arguments from GN metadata.
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#
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# skip_empty_args: If args_file is provided, boolean indicating whether to skip
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# running the program if the file is empty. Used to avoid running commands
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# which error when called without arguments.
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#
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# capture_output: If true, output from the program is hidden unless the program
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# exits with an error. Defaults to true.
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#
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# Example:
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#
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# pw_exec("hello_world") {
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# program = "/bin/sh"
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# args = [
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# "-c",
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# "echo hello \$WORLD",
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# ]
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# env = [
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# "WORLD=world",
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# ]
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# }
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#
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template("pw_exec") {
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assert(defined(invoker.program), "pw_exec requires a program to run")
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_script_args = [
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"--target",
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target_name,
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]
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if (defined(invoker.env_file)) {
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_script_args += [
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"--env-file",
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rebase_path(invoker.env_file),
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]
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}
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if (defined(invoker.args_file)) {
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_script_args += [
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"--args-file",
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rebase_path(invoker.args_file),
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]
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if (defined(invoker.skip_empty_args) && invoker.skip_empty_args) {
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_script_args += [ "--skip-empty-args" ]
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}
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}
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if (defined(invoker.env)) {
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foreach(_env, invoker.env) {
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_script_args += [
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"--env",
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_env,
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]
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}
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}
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if (!defined(invoker.capture_output) || invoker.capture_output) {
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_script_args += [ "--capture-output" ]
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}
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_script_args += [
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"--",
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invoker.program,
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]
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if (defined(invoker.args)) {
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_script_args += invoker.args
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}
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pw_python_action(target_name) {
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script = "$dir_pw_build/py/pw_build/exec.py"
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args = _script_args
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forward_variables_from(invoker,
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[
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"deps",
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"inputs",
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"pool",
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])
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if (!defined(inputs)) {
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inputs = []
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}
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if (defined(invoker.env_file)) {
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inputs += [ invoker.env_file ]
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}
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if (defined(invoker.outputs)) {
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outputs = invoker.outputs
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} else {
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stamp = true
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}
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}
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}
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