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# Copyright (c) Meta Platforms, Inc. and affiliates. # # This source code is licensed under both the MIT license found in the # LICENSE-MIT file in the root directory of this source tree and the Apache # License, Version 2.0 found in the LICENSE-APACHE file in the root directory # of this source tree. load("@prelude//cxx:comp_db.bzl", "CxxCompilationDbInfo") load("@prelude//cxx:compile_types.bzl", "CxxSrcCompileCommand") load("@prelude//utils:utils.bzl", "flatten") def _make_entry(ctx: bxl.Context, compile_command: CxxSrcCompileCommand) -> dict: args = compile_command.cxx_compile_cmd.base_compile_cmd.copy() # This prevents clangd from jumping into `buck-out` when using Go To # Definition, which significantly improves user experience. args.add(["-I", "."]) args.add(compile_command.cxx_compile_cmd.argsfile.cmd_form) args.add(compile_command.args) ctx.output.ensure_multiple(args) return { "arguments": args, "directory": ctx.fs.abs_path_unsafe(ctx.root()), "file": compile_command.src, } def _impl(ctx: bxl.Context): actions = ctx.bxl_actions().actions db = [] targets = ctx.configured_targets(flatten(ctx.cli_args.targets), modifiers = ctx.modifiers) for _name, target in ctx.analysis(targets).items(): comp_db_info = target.providers().get(CxxCompilationDbInfo) if comp_db_info: db += [_make_entry(ctx, cc) for cc in comp_db_info.info.values()] db_file = actions.declare_output("compile_commands.json") actions.write_json(db_file.as_output(), db, with_inputs = True, pretty = True) ctx.output.print(ctx.output.ensure(db_file)) generate = bxl_main( doc = "Generate a compilation database for a set of targets and print its path to stdout", impl = _impl, cli_args = { "targets": cli_args.list( cli_args.target_expr(), doc = "Targets to generate the database for", ), }, )