]> Git Repo - linux.git/blob - scripts/generate_rust_analyzer.py
Merge tag 'for-6.13-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
[linux.git] / scripts / generate_rust_analyzer.py
1 #!/usr/bin/env python3
2 # SPDX-License-Identifier: GPL-2.0
3 """generate_rust_analyzer - Generates the `rust-project.json` file for `rust-analyzer`.
4 """
5
6 import argparse
7 import json
8 import logging
9 import os
10 import pathlib
11 import sys
12
13 def args_crates_cfgs(cfgs):
14     crates_cfgs = {}
15     for cfg in cfgs:
16         crate, vals = cfg.split("=", 1)
17         crates_cfgs[crate] = vals.replace("--cfg", "").split()
18
19     return crates_cfgs
20
21 def generate_crates(srctree, objtree, sysroot_src, external_src, cfgs):
22     # Generate the configuration list.
23     cfg = []
24     with open(objtree / "include" / "generated" / "rustc_cfg") as fd:
25         for line in fd:
26             line = line.replace("--cfg=", "")
27             line = line.replace("\n", "")
28             cfg.append(line)
29
30     # Now fill the crates list -- dependencies need to come first.
31     #
32     # Avoid O(n^2) iterations by keeping a map of indexes.
33     crates = []
34     crates_indexes = {}
35     crates_cfgs = args_crates_cfgs(cfgs)
36
37     def append_crate(display_name, root_module, deps, cfg=[], is_workspace_member=True, is_proc_macro=False):
38         crates_indexes[display_name] = len(crates)
39         crates.append({
40             "display_name": display_name,
41             "root_module": str(root_module),
42             "is_workspace_member": is_workspace_member,
43             "is_proc_macro": is_proc_macro,
44             "deps": [{"crate": crates_indexes[dep], "name": dep} for dep in deps],
45             "cfg": cfg,
46             "edition": "2021",
47             "env": {
48                 "RUST_MODFILE": "This is only for rust-analyzer"
49             }
50         })
51
52     # First, the ones in `rust/` since they are a bit special.
53     append_crate(
54         "core",
55         sysroot_src / "core" / "src" / "lib.rs",
56         [],
57         cfg=crates_cfgs.get("core", []),
58         is_workspace_member=False,
59     )
60
61     append_crate(
62         "compiler_builtins",
63         srctree / "rust" / "compiler_builtins.rs",
64         [],
65     )
66
67     append_crate(
68         "macros",
69         srctree / "rust" / "macros" / "lib.rs",
70         [],
71         is_proc_macro=True,
72     )
73     crates[-1]["proc_macro_dylib_path"] = f"{objtree}/rust/libmacros.so"
74
75     append_crate(
76         "build_error",
77         srctree / "rust" / "build_error.rs",
78         ["core", "compiler_builtins"],
79     )
80
81     append_crate(
82         "bindings",
83         srctree / "rust"/ "bindings" / "lib.rs",
84         ["core"],
85         cfg=cfg,
86     )
87     crates[-1]["env"]["OBJTREE"] = str(objtree.resolve(True))
88
89     append_crate(
90         "kernel",
91         srctree / "rust" / "kernel" / "lib.rs",
92         ["core", "macros", "build_error", "bindings"],
93         cfg=cfg,
94     )
95     crates[-1]["source"] = {
96         "include_dirs": [
97             str(srctree / "rust" / "kernel"),
98             str(objtree / "rust")
99         ],
100         "exclude_dirs": [],
101     }
102
103     def is_root_crate(build_file, target):
104         try:
105             return f"{target}.o" in open(build_file).read()
106         except FileNotFoundError:
107             return False
108
109     # Then, the rest outside of `rust/`.
110     #
111     # We explicitly mention the top-level folders we want to cover.
112     extra_dirs = map(lambda dir: srctree / dir, ("samples", "drivers"))
113     if external_src is not None:
114         extra_dirs = [external_src]
115     for folder in extra_dirs:
116         for path in folder.rglob("*.rs"):
117             logging.info("Checking %s", path)
118             name = path.name.replace(".rs", "")
119
120             # Skip those that are not crate roots.
121             if not is_root_crate(path.parent / "Makefile", name) and \
122                not is_root_crate(path.parent / "Kbuild", name):
123                 continue
124
125             logging.info("Adding %s", name)
126             append_crate(
127                 name,
128                 path,
129                 ["core", "kernel"],
130                 cfg=cfg,
131             )
132
133     return crates
134
135 def main():
136     parser = argparse.ArgumentParser()
137     parser.add_argument('--verbose', '-v', action='store_true')
138     parser.add_argument('--cfgs', action='append', default=[])
139     parser.add_argument("srctree", type=pathlib.Path)
140     parser.add_argument("objtree", type=pathlib.Path)
141     parser.add_argument("sysroot", type=pathlib.Path)
142     parser.add_argument("sysroot_src", type=pathlib.Path)
143     parser.add_argument("exttree", type=pathlib.Path, nargs="?")
144     args = parser.parse_args()
145
146     logging.basicConfig(
147         format="[%(asctime)s] [%(levelname)s] %(message)s",
148         level=logging.INFO if args.verbose else logging.WARNING
149     )
150
151     # Making sure that the `sysroot` and `sysroot_src` belong to the same toolchain.
152     assert args.sysroot in args.sysroot_src.parents
153
154     rust_project = {
155         "crates": generate_crates(args.srctree, args.objtree, args.sysroot_src, args.exttree, args.cfgs),
156         "sysroot": str(args.sysroot),
157     }
158
159     json.dump(rust_project, sys.stdout, sort_keys=True, indent=4)
160
161 if __name__ == "__main__":
162     main()
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