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Added support of toolchains for rustfmt #671

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Added support of toolchains for rustfmt #671

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1 change: 1 addition & 0 deletions doc/formatter_options.md
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Original file line number Diff line number Diff line change
Expand Up @@ -97,6 +97,7 @@ options = {
options = {
-- The default edition of Rust to use when no Cargo.toml file is found
default_edition = "2021",
default_toolchain = "stable"
}
```

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4 changes: 3 additions & 1 deletion lua/conform/formatters/rustfmt.lua
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Expand Up @@ -10,9 +10,11 @@ return {
options = {
-- The default edition of Rust to use when no Cargo.toml file is found
default_edition = "2021",
default_toolchain = "stable",
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@stevearc stevearc Mar 19, 2025

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The default_edition is only a default because it's what we use if there is no Cargo.toml file. Let's rename this to just toolchain.

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@stevearc stevearc Mar 19, 2025

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And should add a short comment above to explain it as well

},
args = function(self, ctx)
local args = { "--emit=stdout" }
local toolchain = "+" .. self.options.default_toolchain
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@stevearc stevearc Mar 19, 2025

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Can you link me to the documentation for passing +<toolchain> to rustfmt? I've seen this for cargo, but would like to read something about how it works for rustfmt.

local args = { toolchain, "--emit=stdout" }
local edition = util.parse_rust_edition(ctx.dirname) or self.options.default_edition
table.insert(args, "--edition=" .. edition)

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