Add wasm sample for CI (#2372)

* Add wasm sample for CI

* Add wasm sample for CI

* Add wasm sample for CI

.azure/azure-pipelines.yml

@@ -12,6 +12,9 @@ strategy:
     linux-extra:
       image: ubuntu-18.04
       style: 'extra'
+    linux-wasm:
+      image: ubuntu-18.04
+      style: 'wasm'
     macos-stable:
       image: macos-10.14
       style: 'unflagged'
@@ -40,6 +43,7 @@ steps:
       if [ -e /etc/debian_version ]
       then
         sudo apt-get -y install libxcb-composite0-dev libx11-dev
+        sudo npm install -g wasm-pack
       fi
       if [ "$(uname)" == "Darwin" ]; then
         curl https://sh.rustup.rs -sSf | sh -s -- -y --no-modify-path --default-toolchain "stable"
@@ -61,6 +65,9 @@ steps:
   - bash: RUSTFLAGS="-D warnings" cargo test --all
     condition: eq(variables['style'], 'canary')
     displayName: Run tests
+  - bash: cd samples/wasm && wasm-pack build
+    condition: eq(variables['style'], 'wasm')
+    displayName: Wasm build
   - bash: RUSTFLAGS="-D warnings" cargo clippy --all -- -D clippy::unwrap_used
     condition: eq(variables['style'], 'canary')
     displayName: Check clippy lints

crates/nu-cli/Cargo.toml

@@ -90,7 +90,7 @@ umask = "1.0.0"
 unicode-xid = "0.2.1"
 uuid_crate = {package = "uuid", version = "0.8.1", features = ["v4"], optional = true}
 which = {version = "4.0.2", optional = true}
-zip = "0.5.6"
+zip = {version = "0.5.6", optional = true}
 
 clipboard = {version = "0.5", optional = true}
 encoding_rs = "0.8.23"
@@ -115,7 +115,7 @@ optional = true
 version = "0.23.1"
 
 [build-dependencies]
-git2 = "0.13"
+git2 = {version = "0.13", optional = true}
 
 
 [dev-dependencies]

crates/nu-cli/build.rs

@@ -1,4 +1,3 @@
-use git2::Repository;
 use std::path::Path;
 use std::{env, fs, io};
 
@@ -18,7 +17,11 @@ fn main() -> Result<(), io::Error> {
     Ok(())
 }
 
-fn latest_commit_hash<P: AsRef<Path>>(dir: P) -> Result<String, git2::Error> {
+#[allow(unused_variables)]
+fn latest_commit_hash<P: AsRef<Path>>(dir: P) -> Result<String, Box<dyn std::error::Error>> {
+    #[cfg(feature = "git2")]
+    {
+        use git2::Repository;
         let dir = dir.as_ref();
         Ok(Repository::discover(dir)?
             .head()?
@@ -26,3 +29,8 @@ fn latest_commit_hash<P: AsRef<Path>>(dir: P) -> Result<String, git2::Error> {
             .id()
             .to_string())
     }
+    #[cfg(not(feature = "git2"))]
+    {
+        Ok(String::new())
+    }
+}

crates/nu-cli/src/commands/to_html.rs

@@ -11,7 +11,6 @@ use serde::{Deserialize, Serialize};
 use std::borrow::Cow;
 use std::collections::HashMap;
 use std::error::Error;
-use std::io::Read;
 
 #[derive(Serialize, Deserialize, Debug)]
 pub struct HtmlThemes {
@@ -183,6 +182,7 @@ fn get_theme_from_asset_file(
     Ok(convert_html_theme_to_hash_map(is_dark, th))
 }
 
+#[allow(unused_variables)]
 fn get_asset_by_name_as_html_themes(
     zip_name: &str,
     json_name: &str,
@@ -194,12 +194,21 @@ fn get_asset_by_name_as_html_themes(
                 Cow::Owned(bytes) => bytes,
             };
             let reader = std::io::Cursor::new(asset);
+            #[cfg(feature = "zip")]
+            {
+                use std::io::Read;
                 let mut archive = zip::ZipArchive::new(reader)?;
                 let mut zip_file = archive.by_name(json_name)?;
                 let mut contents = String::new();
                 zip_file.read_to_string(&mut contents)?;
                 Ok(serde_json::from_str(&contents)?)
             }
+            #[cfg(not(feature = "zip"))]
+            {
+                let th = HtmlThemes::default();
+                Ok(th)
+            }
+        }
         None => {
             let th = HtmlThemes::default();
             Ok(th)

crates/nu-cli/src/env/host.rs

@@ -76,6 +76,7 @@ impl Host for BasicHost {
         }
     }
 
+    #[allow(unused_variables)]
     fn vars(&mut self) -> Vec<(String, String)> {
         #[cfg(not(target_arch = "wasm32"))]
         {
@@ -88,6 +89,7 @@ impl Host for BasicHost {
         }
     }
 
+    #[allow(unused_variables)]
     fn env_get(&mut self, key: OsString) -> Option<OsString> {
         #[cfg(not(target_arch = "wasm32"))]
         {
@@ -99,6 +101,7 @@ impl Host for BasicHost {
         }
     }
 
+    #[allow(unused_variables)]
     fn env_set(&mut self, key: OsString, value: OsString) {
         #[cfg(not(target_arch = "wasm32"))]
         {
@@ -106,6 +109,7 @@ impl Host for BasicHost {
         }
     }
 
+    #[allow(unused_variables)]
     fn env_rm(&mut self, key: OsString) {
         #[cfg(not(target_arch = "wasm32"))]
         {

crates/nu-cli/src/shell/completer.rs

@@ -261,7 +261,7 @@ fn is_executable(file: &DirEntry) -> bool {
 }
 
 #[cfg(target_arch = "wasm32")]
-fn is_executable(file: &DirEntry) -> bool {
+fn is_executable(_file: &DirEntry) -> bool {
     false
 }
 

samples/wasm/.appveyor.yml

@@ -0,0 +1,11 @@
+install:
+  - appveyor-retry appveyor DownloadFile https://win.rustup.rs/ -FileName rustup-init.exe
+  - if not defined RUSTFLAGS rustup-init.exe -y --default-host x86_64-pc-windows-msvc --default-toolchain nightly
+  - set PATH=%PATH%;C:\Users\appveyor\.cargo\bin
+  - rustc -V
+  - cargo -V
+
+build: false
+
+test_script:
+  - cargo test --locked

samples/wasm/.gitignore

@@ -0,0 +1,6 @@
+/target
+**/*.rs.bk
+Cargo.lock
+bin/
+pkg/
+wasm-pack.log

samples/wasm/.travis.yml

@@ -0,0 +1,69 @@
+language: rust
+sudo: false
+
+cache: cargo
+
+matrix:
+  include:
+
+  # Builds with wasm-pack.
+  - rust: beta
+    env: RUST_BACKTRACE=1
+    addons:
+      firefox: latest
+      chrome: stable
+    before_script:
+      - (test -x $HOME/.cargo/bin/cargo-install-update || cargo install cargo-update)
+      - (test -x $HOME/.cargo/bin/cargo-generate || cargo install --vers "^0.2" cargo-generate)
+      - cargo install-update -a
+      - curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh -s -- -f
+    script:
+      - cargo generate --git . --name testing
+      # Having a broken Cargo.toml (in that it has curlies in fields) anywhere
+      # in any of our parent dirs is problematic.
+      - mv Cargo.toml Cargo.toml.tmpl
+      - cd testing
+      - wasm-pack build
+      - wasm-pack test --chrome --firefox --headless
+
+  # Builds on nightly.
+  - rust: nightly
+    env: RUST_BACKTRACE=1
+    before_script:
+      - (test -x $HOME/.cargo/bin/cargo-install-update || cargo install cargo-update)
+      - (test -x $HOME/.cargo/bin/cargo-generate || cargo install --vers "^0.2" cargo-generate)
+      - cargo install-update -a
+      - rustup target add wasm32-unknown-unknown
+    script:
+      - cargo generate --git . --name testing
+      - mv Cargo.toml Cargo.toml.tmpl
+      - cd testing
+      - cargo check
+      - cargo check --target wasm32-unknown-unknown
+      - cargo check                                 --no-default-features
+      - cargo check --target wasm32-unknown-unknown --no-default-features
+      - cargo check                                 --no-default-features --features console_error_panic_hook
+      - cargo check --target wasm32-unknown-unknown --no-default-features --features console_error_panic_hook
+      - cargo check                                 --no-default-features --features "console_error_panic_hook wee_alloc"
+      - cargo check --target wasm32-unknown-unknown --no-default-features --features "console_error_panic_hook wee_alloc"
+
+  # Builds on beta.
+  - rust: beta
+    env: RUST_BACKTRACE=1
+    before_script:
+      - (test -x $HOME/.cargo/bin/cargo-install-update || cargo install cargo-update)
+      - (test -x $HOME/.cargo/bin/cargo-generate || cargo install --vers "^0.2" cargo-generate)
+      - cargo install-update -a
+      - rustup target add wasm32-unknown-unknown
+    script:
+      - cargo generate --git . --name testing
+      - mv Cargo.toml Cargo.toml.tmpl
+      - cd testing
+      - cargo check
+      - cargo check --target wasm32-unknown-unknown
+      - cargo check                                 --no-default-features
+      - cargo check --target wasm32-unknown-unknown --no-default-features
+      - cargo check                                 --no-default-features --features console_error_panic_hook
+      - cargo check --target wasm32-unknown-unknown --no-default-features --features console_error_panic_hook
+      # Note: no enabling the `wee_alloc` feature here because it requires
+      # nightly for now.

samples/wasm/Cargo.toml

@@ -0,0 +1,48 @@
+[package]
+name = "wasm"
+version = "0.1.0"
+authors = ["Nu authors"]
+edition = "2018"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[features]
+default = ["console_error_panic_hook"]
+
+[dependencies]
+wasm-bindgen = "0.2.63"
+
+# The `console_error_panic_hook` crate provides better debugging of panics by
+# logging them with `console.error`. This is great for development, but requires
+# all the `std::fmt` and `std::panicking` infrastructure, so isn't great for
+# code size when deploying.
+console_error_panic_hook = { version = "0.1.6", optional = true }
+
+# `wee_alloc` is a tiny allocator for wasm that is only ~1K in code size
+# compared to the default allocator's ~10K. It is slower than the default
+# allocator, however.
+#
+# Unfortunately, `wee_alloc` requires nightly Rust when targeting wasm for now.
+wee_alloc = { version = "0.4.5", optional = true }
+
+nu-cli = {path = "../../crates/nu-cli", default-features = false}
+nu-errors = {path = "../../crates/nu-errors", default-features = false}
+nu-protocol = {path = "../../crates/nu-protocol", default-features = false}
+nu-source = {path = "../../crates/nu-source", default-features = false}
+
+async-trait = "0.1.36"
+futures = {version = "0.3", features = ["compat", "io-compat"]}
+futures-util = "0.3.5"
+futures_codec = "0.4"
+web-sys = {version = "0.3.14", features = ["console"]}
+
+
+[dev-dependencies]
+wasm-bindgen-test = "0.3.13"
+
+[profile.release]
+# Tell `rustc` to optimize for small code size.
+opt-level = "s"
+
+[workspace]

samples/wasm/LICENSE_APACHE

@@ -0,0 +1,176 @@
+                              Apache License
+                        Version 2.0, January 2004
+                     http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+
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+
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+END OF TERMS AND CONDITIONS

samples/wasm/LICENSE_MIT

@@ -0,0 +1,25 @@
+Copyright (c) 2018 Jonathan turner <jonathan.d.turner@gmail.com>
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

samples/wasm/README.md

@@ -0,0 +1,69 @@
+<div align="center">
+
+  <h1><code>wasm-pack-template</code></h1>
+
+  <strong>A template for kick starting a Rust and WebAssembly project using <a href="https://github.com/rustwasm/wasm-pack">wasm-pack</a>.</strong>
+
+  <p>
+    <a href="https://travis-ci.org/rustwasm/wasm-pack-template"><img src="https://img.shields.io/travis/rustwasm/wasm-pack-template.svg?style=flat-square" alt="Build Status" /></a>
+  </p>
+
+  <h3>
+    <a href="https://rustwasm.github.io/docs/wasm-pack/tutorials/npm-browser-packages/index.html">Tutorial</a>
+    <span> | </span>
+    <a href="https://discordapp.com/channels/442252698964721669/443151097398296587">Chat</a>
+  </h3>
+
+  <sub>Built with 🦀🕸 by <a href="https://rustwasm.github.io/">The Rust and WebAssembly Working Group</a></sub>
+</div>
+
+## About
+
+[**📚 Read this template tutorial! 📚**][template-docs]
+
+This template is designed for compiling Rust libraries into WebAssembly and
+publishing the resulting package to NPM.
+
+Be sure to check out [other `wasm-pack` tutorials online][tutorials] for other
+templates and usages of `wasm-pack`.
+
+[tutorials]: https://rustwasm.github.io/docs/wasm-pack/tutorials/index.html
+[template-docs]: https://rustwasm.github.io/docs/wasm-pack/tutorials/npm-browser-packages/index.html
+
+## 🚴 Usage
+
+### 🐑 Use `cargo generate` to Clone this Template
+
+[Learn more about `cargo generate` here.](https://github.com/ashleygwilliams/cargo-generate)
+
+```
+cargo generate --git https://github.com/rustwasm/wasm-pack-template.git --name my-project
+cd my-project
+```
+
+### 🛠️ Build with `wasm-pack build`
+
+```
+wasm-pack build
+```
+
+### 🔬 Test in Headless Browsers with `wasm-pack test`
+
+```
+wasm-pack test --headless --firefox
+```
+
+### 🎁 Publish to NPM with `wasm-pack publish`
+
+```
+wasm-pack publish
+```
+
+## 🔋 Batteries Included
+
+* [`wasm-bindgen`](https://github.com/rustwasm/wasm-bindgen) for communicating
+  between WebAssembly and JavaScript.
+* [`console_error_panic_hook`](https://github.com/rustwasm/console_error_panic_hook)
+  for logging panic messages to the developer console.
+* [`wee_alloc`](https://github.com/rustwasm/wee_alloc), an allocator optimized
+  for small code size.

samples/wasm/src/lib.rs

@@ -0,0 +1,19 @@
+mod utils;
+
+use wasm_bindgen::prelude::*;
+
+// When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
+// allocator.
+#[cfg(feature = "wee_alloc")]
+#[global_allocator]
+static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
+
+#[wasm_bindgen]
+extern {
+    fn alert(s: &str);
+}
+
+#[wasm_bindgen]
+pub fn greet() {
+    alert("Hello, wasm!");
+}

samples/wasm/src/utils.rs

@@ -0,0 +1,11 @@
+#[allow(unused)]
+pub fn set_panic_hook() {
+    // When the `console_error_panic_hook` feature is enabled, we can call the
+    // `set_panic_hook` function at least once during initialization, and then
+    // we will get better error messages if our code ever panics.
+    //
+    // For more details see
+    // https://github.com/rustwasm/console_error_panic_hook#readme
+    #[cfg(feature = "console_error_panic_hook")]
+    console_error_panic_hook::set_once();
+}

samples/wasm/tests/web.rs

@@ -0,0 +1,13 @@
+//! Test suite for the Web and headless browsers.
+
+#![cfg(target_arch = "wasm32")]
+
+extern crate wasm_bindgen_test;
+use wasm_bindgen_test::*;
+
+wasm_bindgen_test_configure!(run_in_browser);
+
+#[wasm_bindgen_test]
+fn pass() {
+    assert_eq!(1 + 1, 2);
+}