mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-27 01:07:57 +00:00
Benjamin Kampmann
83 lines
2.4 KiB
Rust
83 lines
2.4 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2019-2020 Parity Technologies (UK) Ltd.
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// SPDX-License-Identifier: Apache-2.0
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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use std::fs;
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use tempfile::tempdir;
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/// Checks that all prerequisites are installed.
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///
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/// # Returns
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/// Returns `None` if everything was found and `Some(ERR_MSG)` if something could not be found.
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pub fn check() -> Option<&'static str> {
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if !check_nightly_installed(){
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return Some("Rust nightly not installed, please install it!")
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}
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check_wasm_toolchain_installed()
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}
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fn check_nightly_installed() -> bool {
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crate::get_nightly_cargo().is_nightly()
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}
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fn check_wasm_toolchain_installed() -> Option<&'static str> {
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let temp = tempdir().expect("Creating temp dir does not fail; qed");
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fs::create_dir_all(temp.path().join("src")).expect("Creating src dir does not fail; qed");
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let test_file = temp.path().join("src/lib.rs");
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let manifest_path = temp.path().join("Cargo.toml");
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fs::write(&manifest_path,
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r#"
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[package]
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name = "wasm-test"
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version = "1.0.0"
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edition = "2018"
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[lib]
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name = "wasm_test"
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crate-type = ["cdylib"]
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[workspace]
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"#,
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).expect("Writing wasm-test manifest does not fail; qed");
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fs::write(&test_file, "pub fn test() {}")
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.expect("Writing to the test file does not fail; qed");
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let err_msg = "Rust WASM toolchain not installed, please install it!";
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let manifest_path = manifest_path.display().to_string();
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crate::get_nightly_cargo()
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.command()
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.args(&["build", "--target=wasm32-unknown-unknown", "--manifest-path", &manifest_path])
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.output()
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.map_err(|_| err_msg)
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.and_then(|s|
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if s.status.success() {
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Ok(())
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} else {
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match String::from_utf8(s.stderr) {
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Ok(ref err) if err.contains("linker `rust-lld` not found") => {
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Err("`rust-lld` not found, please install it!")
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},
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_ => Err(err_msg)
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}
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}
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)
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.err()
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}
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