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fix: do not assume rustup is installed in xtask codegen

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When formatting generated code the xtask crate attempts to run `rustup run stable rustfmt`,
which fails if `rustup` is not installed. This results in test failures when another source manages
the compiler toolchain, for example when using Nix (or any other distro-specific packaging solution):

* xtask::codegen::grammar::test
* xtask::codegen::assists_doc_tests::test

With this commit xtask will first attempt to run `rustup run stable rustfmt`, and if that fails just
plain `rustfmt`. It still validates a stable version is being used.

This allows `cargo test` to pass on systems that do not use `rustup`.
This commit is contained in:
Ivar Scholten 2024-08-27 13:59:01 +02:00
parent 0f7f68dad2
commit 7d9e4fcc07
1 changed files with 19 additions and 15 deletions
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34
xtask/src/codegen.rs
View file

@ -126,27 +126,31 @@ impl fmt::Display for Location {
}
}
fn ensure_rustfmt(sh: &Shell) {
let version = cmd!(sh, "rustup run stable rustfmt --version").read().unwrap_or_default();
if !version.contains("stable") {
panic!(
"Failed to run rustfmt from toolchain 'stable'. \
Please run `rustup component add rustfmt --toolchain stable` to install it.",
);
fn rustfmt_executable(sh: &Shell) -> &str {
// First try explicitly requesting the stable channel via rustup in case nightly is being used by default,
// then plain rustfmt in case rustup isn't being used to manage the compiler (e.g. when using Nix).
for executable in ["rustup run stable rustfmt", "rustfmt"] {
let version = cmd!(sh, "{executable} --version").read().unwrap_or_default();
if version.contains("stable") {
return executable;
}
}
panic!(
"Failed to run rustfmt from toolchain 'stable'. \
Please run `rustup component add rustfmt --toolchain stable` to install it.",
);
}
fn reformat(text: String) -> String {
let sh = Shell::new().unwrap();
ensure_rustfmt(&sh);
let rustfmt_exe = rustfmt_executable(&sh);
let rustfmt_toml = project_root().join("rustfmt.toml");
let mut stdout = cmd!(
sh,
"rustup run stable rustfmt --config-path {rustfmt_toml} --config fn_single_line=true"
)
.stdin(text)
.read()
.unwrap();
let mut stdout =
cmd!(sh, "{rustfmt_exe} --config-path {rustfmt_toml} --config fn_single_line=true")
.stdin(text)
.read()
.unwrap();
if !stdout.ends_with('\n') {
stdout.push('\n');
}