Description: Fix get_toml() when cfg(test) When cfg(test), Config::parse doesn't parse a config.toml but uses default values, failing when the initial rustc is needed. This is a workaround before upstream issue gets solved. Bug: https://github.com/rust-lang/rust/issues/105766 Last-Update: 2023-03-29 --- This patch header follows DEP-3: http://dep.debian.net/deps/dep3/ Index: rust/src/bootstrap/src/core/config/config.rs =================================================================== --- rust.orig/src/bootstrap/src/core/config/config.rs +++ rust/src/bootstrap/src/core/config/config.rs @@ -1093,8 +1093,32 @@ impl Config { pub fn parse(args: &[String]) -> Config { #[cfg(test)] - fn get_toml(_: &Path) -> TomlConfig { - TomlConfig::default() + fn get_toml(file: &Path) -> TomlConfig { + // Debian: We use previous version as a custom rustc, which + // unfortunately won't be picked up because config.toml isn't + // read when cfg!(test). Making tests use the entirety of our + // config.toml isn't feasible either as it panicks on + // GitRepo::Llvm (d-bootstrap-custom-debuginfo-path.patch), so + // only give paths of initial rustc and cargo. + let contents = + t!(fs::read_to_string(file), format!("config file {} not found", file.display())); + // Deserialize to Value and then TomlConfig to prevent the Deserialize impl of + // TomlConfig and sub types to be monomorphized 5x by toml. + toml::from_str(&contents) + .and_then(|table: toml::Value| TomlConfig::deserialize(table)) + .map(|table| { + let mut config = TomlConfig::default(); + let mut build = Build::default(); + let cbuild = table.build.unwrap(); + build.rustc = cbuild.rustc; + build.cargo = cbuild.cargo; + config.build = Some(build); + config + }) + .unwrap_or_else(|err| { + eprintln!("failed to parse TOML configuration '{}': {err}", file.display()); + crate::detail_exit(2); + }) } #[cfg(not(test))]