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Subject[PATCH 15/17] scripts: add `generate_rust_analyzer.py`
Date
From: Miguel Ojeda <ojeda@kernel.org>

The `generate_rust_analyzer.py` script generates the configuration
file (`rust-project.json`) for rust-analyzer.

rust-analyzer is a modular compiler frontend for the Rust language.
It provides an LSP server which can be used in editors such as
VS Code, Emacs or Vim.

Co-developed-by: Alex Gaynor <alex.gaynor@gmail.com>
Signed-off-by: Alex Gaynor <alex.gaynor@gmail.com>
Co-developed-by: Geoffrey Thomas <geofft@ldpreload.com>
Signed-off-by: Geoffrey Thomas <geofft@ldpreload.com>
Co-developed-by: Finn Behrens <me@kloenk.de>
Signed-off-by: Finn Behrens <me@kloenk.de>
Co-developed-by: Adam Bratschi-Kaye <ark.email@gmail.com>
Signed-off-by: Adam Bratschi-Kaye <ark.email@gmail.com>
Co-developed-by: Wedson Almeida Filho <wedsonaf@google.com>
Signed-off-by: Wedson Almeida Filho <wedsonaf@google.com>
Co-developed-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Co-developed-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
Co-developed-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Co-developed-by: Sven Van Asbroeck <thesven73@gmail.com>
Signed-off-by: Sven Van Asbroeck <thesven73@gmail.com>
Co-developed-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Gary Guo <gary@garyguo.net>
Co-developed-by: Boris-Chengbiao Zhou <bobo1239@web.de>
Signed-off-by: Boris-Chengbiao Zhou <bobo1239@web.de>
Co-developed-by: Fox Chen <foxhlchen@gmail.com>
Signed-off-by: Fox Chen <foxhlchen@gmail.com>
Co-developed-by: Ayaan Zaidi <zaidi.ayaan@gmail.com>
Signed-off-by: Ayaan Zaidi <zaidi.ayaan@gmail.com>
Co-developed-by: Douglas Su <d0u9.su@outlook.com>
Signed-off-by: Douglas Su <d0u9.su@outlook.com>
Co-developed-by: Yuki Okushi <jtitor@2k36.org>
Signed-off-by: Yuki Okushi <jtitor@2k36.org>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
---
scripts/generate_rust_analyzer.py | 143 ++++++++++++++++++++++++++++++
1 file changed, 143 insertions(+)
create mode 100755 scripts/generate_rust_analyzer.py

diff --git a/scripts/generate_rust_analyzer.py b/scripts/generate_rust_analyzer.py
new file mode 100755
index 00000000000..72c453e1aea
--- /dev/null
+++ b/scripts/generate_rust_analyzer.py
@@ -0,0 +1,143 @@
+#!/usr/bin/env python3
+"""generate_rust_analyzer - Generates the `rust-project.json` file for `rust-analyzer`.
+"""
+
+import argparse
+import json
+import logging
+import pathlib
+import sys
+
+def generate_crates(srctree, objtree, sysroot_src, bindings_file):
+ # 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 = {}
+
+ def append_crate(display_name, root_module, is_workspace_member, deps, cfg):
+ crates_indexes[display_name] = len(crates)
+ crates.append({
+ "display_name": display_name,
+ "root_module": str(root_module),
+ "is_workspace_member": is_workspace_member,
+ "deps": [{"crate": crates_indexes[dep], "name": dep} for dep in deps],
+ "cfg": cfg,
+ "edition": "2018",
+ "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",
+ False,
+ [],
+ [],
+ )
+
+ append_crate(
+ "compiler_builtins",
+ srctree / "rust" / "compiler_builtins.rs",
+ True,
+ [],
+ [],
+ )
+
+ append_crate(
+ "alloc",
+ srctree / "rust" / "alloc" / "lib.rs",
+ True,
+ ["core", "compiler_builtins"],
+ [],
+ )
+
+ append_crate(
+ "macros",
+ srctree / "rust" / "macros" / "lib.rs",
+ True,
+ [],
+ [],
+ )
+ crates[-1]["proc_macro_dylib_path"] = "rust/libmacros.so"
+
+ append_crate(
+ "build_error",
+ srctree / "rust" / "build_error.rs",
+ True,
+ ["core", "compiler_builtins"],
+ [],
+ )
+
+ append_crate(
+ "kernel",
+ srctree / "rust" / "kernel" / "lib.rs",
+ True,
+ ["core", "alloc", "macros", "build_error"],
+ cfg,
+ )
+ crates[-1]["env"]["RUST_BINDINGS_FILE"] = str(bindings_file.resolve(True))
+ crates[-1]["source"] = {
+ "include_dirs": [
+ str(srctree / "rust" / "kernel"),
+ str(objtree / "rust")
+ ],
+ "exclude_dirs": [],
+ }
+
+ # Then, the rest outside of `rust/`.
+ #
+ # We explicitly mention the top-level folders we want to cover.
+ for folder in ("samples", "drivers"):
+ for path in (srctree / folder).rglob("*.rs"):
+ logging.info("Checking %s", path)
+ name = path.name.replace(".rs", "")
+
+ # Skip those that are not crate roots.
+ if f"{name}.o" not in open(path.parent / "Makefile").read():
+ continue
+
+ logging.info("Adding %s", name)
+ append_crate(
+ name,
+ path,
+ True,
+ ["core", "alloc", "kernel"],
+ cfg,
+ )
+
+ return crates
+
+def main():
+ parser = argparse.ArgumentParser()
+ parser.add_argument('--verbose', '-v', action='store_true')
+ parser.add_argument("srctree", type=pathlib.Path)
+ parser.add_argument("objtree", type=pathlib.Path)
+ parser.add_argument("sysroot_src", type=pathlib.Path)
+ parser.add_argument("bindings_file", type=pathlib.Path)
+ args = parser.parse_args()
+
+ logging.basicConfig(
+ format="[%(asctime)s] [%(levelname)s] %(message)s",
+ level=logging.INFO if args.verbose else logging.WARNING
+ )
+
+ rust_project = {
+ "crates": generate_crates(args.srctree, args.objtree, args.sysroot_src, args.bindings_file),
+ "sysroot_src": str(args.sysroot_src),
+ }
+
+ json.dump(rust_project, sys.stdout, sort_keys=True, indent=4)
+
+if __name__ == "__main__":
+ main()
--
2.32.0
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