Add basic support for targets related to wasm32.

.github/workflows/wasm.yml

@@ -0,0 +1,30 @@
+name: WASM
+
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: "35 2 * * *"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Add target
+        run: rustup target add wasm32-unknown-unknown
+      - name: Run build
+        run: cargo build --verbose
+      - name: Setup emsdk with cache
+        uses: mymindstorm/setup-emsdk@v11
+        with:
+          version: 1.38.40
+          actions-cache-folder: 'emsdk-cache'
+      - name: Install vcpkg
+        run: |
+          git clone https://github.com/Microsoft/vcpkg.git vcp
+          vcp/bootstrap-vcpkg.sh
+      - name: Run integration tests
+        run: |
+          tests/wasm.sh

README.md

@@ -1,4 +1,4 @@
-# vcpkg-rs [![Windows](https://github.com/mcgoo/vcpkg-rs/workflows/Windows/badge.svg?branch=master)](https://github.com/mcgoo/vcpkg-rs/actions?query=workflow%3AWindows) [![macOS](https://github.com/mcgoo/vcpkg-rs/workflows/macOS/badge.svg?branch=master)](https://github.com/mcgoo/vcpkg-rs/actions?query=workflow%3AmacOS) [![Linux](https://github.com/mcgoo/vcpkg-rs/workflows/Linux/badge.svg?branch=master)](https://github.com/mcgoo/vcpkg-rs/actions?query=workflow%3ALinux)
+# vcpkg-rs [![Windows](https://github.com/mcgoo/vcpkg-rs/workflows/Windows/badge.svg?branch=master)](https://github.com/mcgoo/vcpkg-rs/actions?query=workflow%3AWindows) [![macOS](https://github.com/mcgoo/vcpkg-rs/workflows/macOS/badge.svg?branch=master)](https://github.com/mcgoo/vcpkg-rs/actions?query=workflow%3AmacOS) [![Linux](https://github.com/mcgoo/vcpkg-rs/workflows/Linux/badge.svg?branch=master)](https://github.com/mcgoo/vcpkg-rs/actions?query=workflow%3ALinux) [![WASM](https://github.com/mcgoo/vcpkg-rs/workflows/Linux/badge.svg?branch=master)](https://github.com/mcgoo/vcpkg-rs/actions?query=workflow%3AWASM)
 
 [Documentation](https://docs.rs/vcpkg) [Changelog](CHANGELOG.md)
 

src/lib.rs

@@ -46,6 +46,17 @@
 //! generate dynamically linked binaries, in which case you will have to arrange for
 //! dlls from your Vcpkg installation to be available in your path.
 //!
+//! ## WASM 32
+//! 
+//! At this time, vcpkg has a single triplet for wasm32, wasm32-emscripten,
+//! while rust has several targets for wasm32.
+//! Currently all of these targets are mapped to wasm32-emscripten triplet.
+//! 
+//! You can open an [issue](https://github.com/mcgoo/vcpkg-rs/issue)
+//! if more wasm32 triplets come to vcpkg. 
+//! And just like other target, it is possibleto select a custom triplet 
+//! using the `VCPKGRS_TRIPLET` environment variable.
+//! 
 //! # Environment variables
 //!
 //! A number of environment variables are available to globally configure which
@@ -58,7 +69,7 @@
 //!
 //! * `VCPKG_INSTALLED_ROOT` - Set the directory for the vcpkg installed directory. Corresponding to
 //! `--x-install-root` flag in `vcpkg install` command.
-//! A typical use case is to set it to `vcpkg_installed` directory under build directory 
+//! A typical use case is to set it to `vcpkg_installed` directory under build directory
 //! to adapt [manifest mode of vcpkg](https://learn.microsoft.com/en-us/vcpkg/users/manifests).
 //! If set, this will override the default value of `VCPKG_ROOT/installed`.
 //!  
@@ -734,13 +745,13 @@ fn load_ports(target: &VcpkgTarget) -> Result<BTreeMap<String, Port>, Error> {
     // load updates to the status file that have yet to be normalized
     let status_update_dir = target.status_path.join("updates");
 
-    let paths = try!(fs::read_dir(&status_update_dir).map_err(
-        |e| Error::VcpkgInstallation(format!(
+    let paths = try!(
+        fs::read_dir(&status_update_dir).map_err(|e| Error::VcpkgInstallation(format!(
             "could not read status file updates dir ({}): {}",
             status_update_dir.display(),
             e
-        ))
-    ));
+        )))
+    );
 
     // get all of the paths of the update files into a Vec<PathBuf>
     let mut paths = try!(paths
@@ -1364,6 +1375,13 @@ fn detect_target_triplet() -> Result<TargetTriplet, Error> {
             lib_suffix: "a".into(),
             strip_lib_prefix: true,
         })
+    } else if target.starts_with("wasm32-") {
+        Ok(TargetTriplet {
+            triplet: "wasm32-emscripten".into(),
+            is_static: true,
+            lib_suffix: "a".into(),
+            strip_lib_prefix: true,
+        })
     } else if !target.contains("-pc-windows-msvc") {
         Err(Error::NotMSVC)
     } else if target.starts_with("x86_64-") {
@@ -1444,10 +1462,10 @@ mod tests {
 
     extern crate tempfile;
 
+    use self::tempfile::tempdir;
     use super::*;
     use std::env;
     use std::sync::Mutex;
-    use self::tempfile::tempdir;
 
     lazy_static! {
         static ref LOCK: Mutex<()> = Mutex::new(());

tests/harfbuzz/build.rs

@@ -4,12 +4,6 @@ extern crate vcpkg;
 fn main() {
     let libs = vcpkg::Config::new().find_package("harfbuzz").unwrap();
 
-    // vcpkg-rs is not capable of working out the correct order to link
-    // libraries in. This only matters on Linux at present. (vcpkg itself
-    // does fine, but vcpkg-rs needs to work out how to get the link order
-    // from the it.)
-    println!("cargo:rustc-link-lib=brotlicommon-static");
-
     let mut build = cc::Build::new();
     build.file("src/test.c");
     for inc in libs.include_paths {

tests/wasm.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+set -ex
+
+SCRIPTDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+cd $SCRIPTDIR
+
+TRIPLET=wasm32-emscripten
+
+export CARGO_BUILD_TARGET=wasm32-unknown-unknown
+
+export VCPKG_ROOT=$SCRIPTDIR/../vcp
+
+source ../setup_vcp.sh
+
+for port in harfbuzz ; do
+    # check that the port fails before it is installed
+    $VCPKG_ROOT/vcpkg remove $port:$TRIPLET  || true
+    cargo clean --manifest-path $port/Cargo.toml
+    cargo build --manifest-path $port/Cargo.toml && exit 2
+    echo THIS FAILURE IS EXPECTED
+    echo This is to ensure that we are not spuriously succeeding because the libraries already exist somewhere on the build machine.
+    $VCPKG_ROOT/vcpkg install $port:$TRIPLET
+    cargo build --manifest-path $port/Cargo.toml
+done
+
+
+# check manifest mode
+
+# clean first
+cargo clean --manifest-path top-level/Cargo.toml
+unset VCPKG_INSTALLED_ROOT
+rm -rf $VCPKG_ROOT/installed
+
+cargo build --manifest-path top-level/Cargo.toml && exit 2
+echo "This failure is expected, as we haven't installed anything from vcpkg yet."
+
+export VCPKG_INSTALLED_ROOT=$SCRIPTDIR/top-level/vcpkg_installed
+pushd top-level
+$VCPKG_ROOT/vcpkg install --triplet=$TRIPLET
+popd
+cargo build --manifest-path top-level/Cargo.toml
+unset VCPKG_INSTALLED_ROOT