fork of https://github.com/rustwasm/wasm-pack for the needs of NextGraph.org
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103 lines
3.4 KiB
103 lines
3.4 KiB
//! Building a Rust crate into a `.wasm` binary.
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use child;
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use emoji;
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use error::Error;
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use failure::ResultExt;
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use progressbar::Step;
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use slog::Logger;
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use std::path::Path;
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use std::process::Command;
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use std::str;
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use PBAR;
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/// Ensure that `rustc` is present and that it is >= 1.30.0
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pub fn check_rustc_version(step: &Step) -> Result<String, failure::Error> {
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let msg = format!("{}Checking `rustc` version...", emoji::CRAB);
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PBAR.step(step, &msg);
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let local_minor_version = rustc_minor_version();
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match local_minor_version {
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Some(mv) => {
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if mv < 30 {
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return Err(Error::RustcVersion {
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message: format!(
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"Your version of Rust, '1.{}', is not supported. Please install Rust version 1.30.0 or higher.",
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mv.to_string()
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),
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local_minor_version: mv.to_string(),
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}.into())
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} else {
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Ok(mv.to_string())
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}
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},
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None => Err(Error::RustcMissing {
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message: "We can't figure out what your Rust version is- which means you might not have Rust installed. Please install Rust version 1.30.0 or higher.".to_string(),
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}.into()),
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}
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}
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// from https://github.com/alexcrichton/proc-macro2/blob/79e40a113b51836f33214c6d00228934b41bd4ad/build.rs#L44-L61
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fn rustc_minor_version() -> Option<u32> {
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macro_rules! otry {
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($e:expr) => {
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match $e {
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Some(e) => e,
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None => return None,
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}
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};
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}
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let output = otry!(Command::new("rustc").arg("--version").output().ok());
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let version = otry!(str::from_utf8(&output.stdout).ok());
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let mut pieces = version.split('.');
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if pieces.next() != Some("rustc 1") {
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return None;
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}
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otry!(pieces.next()).parse().ok()
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}
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/// Ensure that `rustup` has the `wasm32-unknown-unknown` target installed for
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/// current toolchain
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pub fn rustup_add_wasm_target(log: &Logger, step: &Step) -> Result<(), failure::Error> {
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let msg = format!("{}Adding WASM target...", emoji::TARGET);
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PBAR.step(step, &msg);
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let mut cmd = Command::new("rustup");
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cmd.arg("target").arg("add").arg("wasm32-unknown-unknown");
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child::run(log, cmd, "rustup")
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.context("Adding the wasm32-unknown-unknown target with rustup")?;
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Ok(())
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}
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/// Run `cargo build` targetting `wasm32-unknown-unknown`.
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pub fn cargo_build_wasm(
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log: &Logger,
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path: &Path,
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debug: bool,
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step: &Step,
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) -> Result<(), failure::Error> {
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let msg = format!("{}Compiling to WASM...", emoji::CYCLONE);
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PBAR.step(step, &msg);
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let mut cmd = Command::new("cargo");
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cmd.current_dir(path).arg("build").arg("--lib");
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if !debug {
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cmd.arg("--release");
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}
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cmd.arg("--target").arg("wasm32-unknown-unknown");
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child::run(log, cmd, "cargo build").context("Compiling your crate to WebAssembly failed")?;
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Ok(())
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}
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/// Run `cargo build --tests` targetting `wasm32-unknown-unknown`.
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pub fn cargo_build_wasm_tests(
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log: &Logger,
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path: &Path,
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debug: bool,
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) -> Result<(), failure::Error> {
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let mut cmd = Command::new("cargo");
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cmd.current_dir(path).arg("build").arg("--tests");
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if !debug {
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cmd.arg("--release");
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}
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cmd.arg("--target").arg("wasm32-unknown-unknown");
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child::run(log, cmd, "cargo build").context("Compilation of your program failed")?;
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Ok(())
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}
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