def rust_toolchain()

in build/fbcode_builder/fbcode_builder.py [0:0]
29 lines of code
3 McCabe index (conditional complexity)

    def rust_toolchain(self):
        actions = []
        if self.option("rust_toolchain", False):
            (toolchain, is_bootstrap) = self.option("rust_toolchain")
            rust_dir = path_join(self.option("prefix"), "rust")
            actions = [
                self.set_env("CARGO_HOME", rust_dir),
                self.set_env("RUSTUP_HOME", rust_dir),
                self.set_env("RUSTC_BOOTSTRAP", "1" if is_bootstrap else "0"),
                self.run(
                    ShellQuoted(
                        "curl -sSf https://build.travis-ci.com/files/rustup-init.sh"
                        " | sh -s --"
                        "   --default-toolchain={r} "
                        "   --profile=minimal"
                        "   --no-modify-path"
                        "   -y"
                    ).format(p=rust_dir, r=toolchain)
                ),
                self.set_env(
                    "PATH",
                    ShellQuoted("{p}:$PATH").format(p=path_join(rust_dir, "bin")),
                ),
                self.run(ShellQuoted("rustup update")),
                self.run(ShellQuoted("rustc --version")),
                self.run(ShellQuoted("rustup --version")),
                self.run(ShellQuoted("cargo --version")),
            ]
        return actions