page_pool: fragment API support for 32-bit arch with 64-bit DMA
[platform/kernel/linux-rpi.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         "alloc",
69         srctree / "rust" / "alloc" / "lib.rs",
70         ["core", "compiler_builtins"],
71         cfg=crates_cfgs.get("alloc", []),
72     )
73
74     append_crate(
75         "macros",
76         srctree / "rust" / "macros" / "lib.rs",
77         [],
78         is_proc_macro=True,
79     )
80     crates[-1]["proc_macro_dylib_path"] = f"{objtree}/rust/libmacros.so"
81
82     append_crate(
83         "build_error",
84         srctree / "rust" / "build_error.rs",
85         ["core", "compiler_builtins"],
86     )
87
88     append_crate(
89         "bindings",
90         srctree / "rust"/ "bindings" / "lib.rs",
91         ["core"],
92         cfg=cfg,
93     )
94     crates[-1]["env"]["OBJTREE"] = str(objtree.resolve(True))
95
96     append_crate(
97         "kernel",
98         srctree / "rust" / "kernel" / "lib.rs",
99         ["core", "alloc", "macros", "build_error", "bindings"],
100         cfg=cfg,
101     )
102     crates[-1]["source"] = {
103         "include_dirs": [
104             str(srctree / "rust" / "kernel"),
105             str(objtree / "rust")
106         ],
107         "exclude_dirs": [],
108     }
109
110     def is_root_crate(build_file, target):
111         try:
112             return f"{target}.o" in open(build_file).read()
113         except FileNotFoundError:
114             return False
115
116     # Then, the rest outside of `rust/`.
117     #
118     # We explicitly mention the top-level folders we want to cover.
119     extra_dirs = map(lambda dir: srctree / dir, ("samples", "drivers"))
120     if external_src is not None:
121         extra_dirs = [external_src]
122     for folder in extra_dirs:
123         for path in folder.rglob("*.rs"):
124             logging.info("Checking %s", path)
125             name = path.name.replace(".rs", "")
126
127             # Skip those that are not crate roots.
128             if not is_root_crate(path.parent / "Makefile", name) and \
129                not is_root_crate(path.parent / "Kbuild", name):
130                 continue
131
132             logging.info("Adding %s", name)
133             append_crate(
134                 name,
135                 path,
136                 ["core", "alloc", "kernel"],
137                 cfg=cfg,
138             )
139
140     return crates
141
142 def main():
143     parser = argparse.ArgumentParser()
144     parser.add_argument('--verbose', '-v', action='store_true')
145     parser.add_argument('--cfgs', action='append', default=[])
146     parser.add_argument("srctree", type=pathlib.Path)
147     parser.add_argument("objtree", type=pathlib.Path)
148     parser.add_argument("sysroot_src", type=pathlib.Path)
149     parser.add_argument("exttree", type=pathlib.Path, nargs="?")
150     args = parser.parse_args()
151
152     logging.basicConfig(
153         format="[%(asctime)s] [%(levelname)s] %(message)s",
154         level=logging.INFO if args.verbose else logging.WARNING
155     )
156
157     rust_project = {
158         "crates": generate_crates(args.srctree, args.objtree, args.sysroot_src, args.exttree, args.cfgs),
159         "sysroot_src": str(args.sysroot_src),
160     }
161
162     json.dump(rust_project, sys.stdout, sort_keys=True, indent=4)
163
164 if __name__ == "__main__":
165     main()