#!/usr/bin/env python3# SPDX-License-Identifier: GPL-2.0"""generate_rust_analyzer - Generates the `rust-project.json` file for `rust-analyzer`.""" import argparseimport jsonimport loggingimport osimport pathlibimport sys def args_crates_cfgs(cfgs):    crates_cfgs = {}    for cfg in cfgs:        crate, vals = cfg.split("=", 1)        crates_cfgs[crate] = vals.replace("--cfg", "").split()     return crates_cfgs def generate_crates(srctree, objtree, sysroot_src, external_src, cfgs):    # Generate the configuration list.    cfg = []    with open(objtree / "include" / "generated" / "rustc_cfg") as fd:        for line in fd:            line = line.replace("--cfg=", "")            line = line.replace("\n", "")            cfg.append(line)     # Now fill the crates list -- dependencies need to come first.    #    # Avoid O(n^2) iterations by keeping a map of indexes.    crates = []    crates_indexes = {}    crates_cfgs = args_crates_cfgs(cfgs)     def append_crate(display_name, root_module, deps, cfg=[], is_workspace_member=True, is_proc_macro=False):        crates_indexes[display_name] = len(crates)        crates.append({            "display_name": display_name,            "root_module": str(root_module),            "is_workspace_member": is_workspace_member,            "is_proc_macro": is_proc_macro,            "deps": [{"crate": crates_indexes[dep], "name": dep} for dep in deps],            "cfg": cfg,            "edition": "2021",            "env": {                "RUST_MODFILE": "This is only for rust-analyzer"            }        })     # First, the ones in `rust/` since they are a bit special.    append_crate(        "core",        sysroot_src / "core" / "src" / "lib.rs",        [],        cfg=crates_cfgs.get("core", []),        is_workspace_member=False,    )     append_crate(        "compiler_builtins",        srctree / "rust" / "compiler_builtins.rs",        [],    )     append_crate(        "macros",        srctree / "rust" / "macros" / "lib.rs",        [],        is_proc_macro=True,    )    crates[-1]["proc_macro_dylib_path"] = f"{objtree}/rust/libmacros.so"     append_crate(        "build_error",        srctree / "rust" / "build_error.rs",        ["core", "compiler_builtins"],    )     append_crate(        "bindings",        srctree / "rust"/ "bindings" / "lib.rs",        ["core"],        cfg=cfg,    )    crates[-1]["env"]["OBJTREE"] = str(objtree.resolve(True))     append_crate(        "kernel",        srctree / "rust" / "kernel" / "lib.rs",        ["core", "macros", "build_error", "bindings"],        cfg=cfg,    )    crates[-1]["source"] = {        "include_dirs": [            str(srctree / "rust" / "kernel"),            str(objtree / "rust")        ],        "exclude_dirs": [],    }     def is_root_crate(build_file, target):        try:            return f"{target}.o" in open(build_file).read()        except FileNotFoundError:            return False     # Then, the rest outside of `rust/`.    #    # We explicitly mention the top-level folders we want to cover.    extra_dirs = map(lambda dir: srctree / dir, ("samples", "drivers"))    if external_src is not None:        extra_dirs = [external_src]    for folder in extra_dirs:        for path in folder.rglob("*.rs"):            logging.info("Checking %s", path)            name = path.name.replace(".rs", "")             # Skip those that are not crate roots.            if not is_root_crate(path.parent / "Makefile", name) and \               not is_root_crate(path.parent / "Kbuild", name):                continue             logging.info("Adding %s", name)            append_crate(                name,                path,                ["core", "kernel"],                cfg=cfg,            )     return crates def main():    parser = argparse.ArgumentParser()    parser.add_argument('--verbose', '-v', action='store_true')    parser.add_argument('--cfgs', action='append', default=[])    parser.add_argument("srctree", type=pathlib.Path)    parser.add_argument("objtree", type=pathlib.Path)    parser.add_argument("sysroot", type=pathlib.Path)    parser.add_argument("sysroot_src", type=pathlib.Path)    parser.add_argument("exttree", type=pathlib.Path, nargs="?")    args = parser.parse_args()     logging.basicConfig(        format="[%(asctime)s] [%(levelname)s] %(message)s",        level=logging.INFO if args.verbose else logging.WARNING    )     # Making sure that the `sysroot` and `sysroot_src` belong to the same toolchain.    assert args.sysroot in args.sysroot_src.parents     rust_project = {        "crates": generate_crates(args.srctree, args.objtree, args.sysroot_src, args.exttree, args.cfgs),        "sysroot": str(args.sysroot),    }     json.dump(rust_project, sys.stdout, sort_keys=True, indent=4) if __name__ == "__main__":    main()