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#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0
"""generate_rust_analyzer - Generates the `rust-project.json` file for `rust-analyzer`.
"""
import argparse
import json
import logging
import os
import pathlib
import 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, core_edition):
# 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, edition="2021"):
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": edition,
"env": {
"RUST_MODFILE": "This is only for rust-analyzer"
}
})
def append_sysroot_crate(
display_name,
deps,
cfg=[],
edition="2021",
):
append_crate(
display_name,
sysroot_src / display_name / "src" / "lib.rs",
deps,
cfg,
is_workspace_member=False,
edition=edition,
)
# NB: sysroot crates reexport items from one another so setting up our transitive dependencies
# here is important for ensuring that rust-analyzer can resolve symbols. The sources of truth
# for this dependency graph are `(sysroot_src / crate / "Cargo.toml" for crate in crates)`.
append_sysroot_crate("core", [], cfg=crates_cfgs.get("core", []), edition=core_edition)
append_sysroot_crate("alloc", ["core"])
append_sysroot_crate("std", ["alloc", "core"])
append_sysroot_crate("proc_macro", ["core", "std"])
append_crate(
"compiler_builtins",
srctree / "rust" / "compiler_builtins.rs",
[],
)
append_crate(
"macros",
srctree / "rust" / "macros" / "lib.rs",
["std", "proc_macro"],
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(
"ffi",
srctree / "rust" / "ffi.rs",
["core", "compiler_builtins"],
)
def append_crate_with_generated(
display_name,
deps,
):
append_crate(
display_name,
srctree / "rust"/ display_name / "lib.rs",
deps,
cfg=cfg,
)
crates[-1]["env"]["OBJTREE"] = str(objtree.resolve(True))
crates[-1]["source"] = {
"include_dirs": [
str(srctree / "rust" / display_name),
str(objtree / "rust")
],
"exclude_dirs": [],
}
append_crate_with_generated("bindings", ["core", "ffi"])
append_crate_with_generated("uapi", ["core", "ffi"])
append_crate_with_generated("kernel", ["core", "macros", "build_error", "ffi", "bindings", "uapi"])
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("core_edition")
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, args.core_edition),
"sysroot": str(args.sysroot),
}
json.dump(rust_project, sys.stdout, sort_keys=True, indent=4)
if __name__ == "__main__":
main()
|
