58d2c71c20
This avoids problems with files containing invalid utf-8 data, which may cause
panic's like:
```
thread 'main' panicked at external/rules_rust~~_crate~ql~~r~r__ra_ap_salsa-0.0.232/src/input.rs:91:32:
no value set for CompressedFileTextQuery(FileId(2429))
stack backtrace:
0: rust_begin_unwind
at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/std/src/panicking.rs:665:5
1: core::panicking::panic_fmt
at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/panicking.rs:74:14
2: <salsa::input::InputStorage<Q> as salsa::plumbing::QueryStorageOps<Q>>::fetch
3: <DB as ra_ap_base_db::SourceDatabase>::compressed_file_text::__shim
4: <ra_ap_base_db::FileTextQuery as salsa::plumbing::QueryFunction>::execute
5: salsa::Cycle::catch
6: salsa::derived_lru::slot::Slot<Q,MP>::execute
7: salsa::derived_lru::slot::Slot<Q,MP>::read
8: <salsa::derived_lru::DerivedStorage<Q,MP> as salsa::plumbing::QueryStorageOps<Q>>::fetch
9: <DB as ra_ap_base_db::SourceDatabase>::file_text::__shim
10: <DB as ra_ap_base_db::SourceDatabase>::file_text
11: <ra_ap_base_db::ParseQuery as salsa::plumbing::QueryFunction>::execute
12: salsa::Cycle::catch
13: salsa::derived_lru::slot::Slot<Q,MP>::execute
14: salsa::derived_lru::slot::Slot<Q,MP>::read
15: <salsa::derived_lru::DerivedStorage<Q,MP> as salsa::plumbing::QueryStorageOps<Q>>::fetch
16: <DB as ra_ap_base_db::SourceDatabase>::parse::__shim
17: <DB as ra_ap_base_db::SourceDatabase>::parse
18: ra_ap_hir::semantics::SemanticsImpl::parse
19: single_arch_extractor::main
```
Rust on CodeQL
Warning
Rust support for CodeQL is experimental. No support is offered. QL and database interfaces will change and break without notice or deprecation periods.
Development
Dependencies
If you don't have the semmle-code repo you may need to install Bazel manually, e.g. from https://github.com/bazelbuild/bazelisk.
Building the Rust Extractor
This approach uses a released codeql version and is simpler to use for QL development. From your semmle-code directory run:
bazel run @codeql//rust:rust-installer
You now need to create a per-user CodeQL configuration file and specify the option:
--search-path PATH/TO/semmle-code/ql
(wherever the codeql checkout is on your system)
You can now use the Rust extractor e.g. to run Rust tests from the command line or in VSCode.
Building the Rust Extractor (as a sembuild target)
This approach allows you to build a Rust extractor with a CLI built from source. From your semmle-code directory run:
./build target/intree/codeql-rust
You can now invoke it directly, for example to run some tests:
./target/intree/codeql-rust/codeql test run ql/rust/ql/test/PATH/TO/TEST/
Building a Database
TODO
Code Generation
TODO