Fix and re-enable MSI build

appveyor.yml

@@ -5,9 +5,8 @@ environment:
   - TARGET: x86_64-pc-windows-msvc
     ALLOW_PR: 1
   - TARGET: i686-pc-windows-msvc
-  # FIXME
-  #- TARGET: i686-pc-windows-msvc
-  #  BUILD_MSI: 1
+  - TARGET: i686-pc-windows-msvc
+    BUILD_MSI: 1
   - TARGET: i686-pc-windows-gnu
     MINGW_DIR: mingw32
   - TARGET: x86_64-pc-windows-gnu
@@ -72,15 +71,8 @@ test_script:
   - cargo build --release --target %TARGET% %FEATURES%
   - cargo test --release -p rustup-dist --target %TARGET%
   - cargo test --release --target %TARGET% %FEATURES%
-  - ps: |
-      if($env:BUILD_MSI) {
-        cd src\rustup-win-installer
-        cargo build --release --target $env:TARGET
-        cd msi
-        .\build.ps1 -Target $env:TARGET
-        cd ..\..\..
-        if($LastExitCode -ne 0) { $host.SetShouldExit($LastExitCode) }
-      }
+  - if defined BUILD_MSI pushd src\rustup-win-installer && cargo build --release --target %TARGET% & popd
+  - if defined BUILD_MSI pushd src\rustup-win-installer\msi && powershell .\build.ps1 -Target %TARGET% & popd
 
 notifications:
   - provider: Webhook

src/rustup-win-installer/Cargo.toml

@@ -8,6 +8,13 @@ build = "build.rs"
 name = "rustup_msi"
 crate-type = ["cdylib"]
 
+[features]
+# Prevents confusion and reduces build time (`rustup` will be built twice otherwise)
+default = ["rustup/msi-installed"]
+
 [dependencies]
 winapi = "0.2"
 rustup = { path = "../../", version = "1.1.0" }
+
+[build-dependencies]
+gcc = "0.3"

src/rustup-win-installer/README.md

@@ -0,0 +1,11 @@
+# How to build
+
+Important: For all `cargo build` invocations, set `--target` (even if the target is the same as the host architecture), because that affects the output directory. Pass the same target also via `-Target` to `build.ps1` in step 3.
+
+## Steps
+
+1) Build the main project with the `--features "msi-installed"` flag, resulting in `rustup-init.exe`
+2) Build the CustomAction DLL in `src/rustup-win-installer` using `cargo build`
+3) Build the actual installer in `src/rustup-win-installer/msi` using `build.ps1`
+
+The resulting installer will be in `src/rustup-win-installer/msi/target`.

src/rustup-win-installer/build.rs

@@ -1,13 +1,38 @@
+extern crate gcc;
+
 use std::env;
+use gcc::windows_registry::{self, VsVers};
 
 fn main() {
-    println!("cargo:rustc-link-lib=static=wcautil");
-    println!("cargo:rustc-link-lib=static=dutil");
     println!("cargo:rustc-link-lib=dylib=msi");
     println!("cargo:rustc-link-lib=dylib=user32");
     println!("cargo:rustc-link-lib=dylib=mincore");
 
-    let wix_path = env::var("WIX").unwrap();
-    // x86 target is hard-coded because we only build an x86 installer (works just fine on x64)
-    println!("cargo:rustc-link-search=native={}SDK\\VS2015\\lib\\x86", wix_path);
+    // Part of WIX SDK
+    println!("cargo:rustc-link-lib=static=wcautil");
+    println!("cargo:rustc-link-lib=static=dutil");
+
+    let wix_path = env::var("WIX").expect("WIX must be installed, and 'WIX' environment variable must be set");
+
+    // For the correct WIX library path, we need to know which VS version we are using.
+    // We use the `gcc` crate's functionality to do this, which should always match what rustc is doing.
+    let vs_version = windows_registry::find_vs_version().expect("Cannot find VS version");
+    let vs_version_string = match vs_version {
+        VsVers::Vs14 => "VS2015",
+        VsVers::Vs15 => "VS2017",
+        VsVers::Vs12 => panic!("Unsupported VS version: Vs12"),
+        _ => panic!("Unsupported VS version") // FIXME: should use {:?}, but `VsVers` does not yet implement `Debug`
+    };
+
+    println!("cargo:warning=Using WIX libraries for VS version: {}", vs_version_string);
+
+    let target_arch = env::var("CARGO_CFG_TARGET_ARCH").expect("cannot read CARGO_CFG_TARGET_ARCH in build script");
+    let target_arch = match target_arch.as_str() {
+        "x86" => "x86",
+        "x86_64" => "x64",
+        other => panic!("Target architecture {} not supported by WIX.", other)
+    };
+
+    // Tell cargo about the WIX SDK path for `wcautil.lib` and `dutil.lib`
+    println!("cargo:rustc-link-search=native={}SDK\\{}\\lib\\{}", wix_path, vs_version_string, target_arch);
 }

src/rustup-win-installer/msi/build.ps1

@@ -12,7 +12,12 @@ $env:CFG_VER_PATCH = $version[2]
 foreach($file in Get-ChildItem *.wxs) {
     $in = $file.Name
     $out = $($file.Name.Replace(".wxs",".wixobj"))
-    &"$($env:WIX)bin\candle.exe" -nologo -arch x86 "-dTARGET=$Target" -ext WixUIExtension -ext WixUtilExtension -out "target\$out" $in
+    if ($Target -match "x86_64") {
+        $target_arch = "x64"
+    } else {
+        $target_arch = "x86"
+    }
+    &"$($env:WIX)bin\candle.exe" -nologo -arch "$target_arch" "-dTARGET=$Target" -ext WixUIExtension -ext WixUtilExtension -out "target\$out" $in
     if ($LASTEXITCODE -ne 0) { exit 1 }
 }
 

src/rustup-win-installer/msi/rustup.wxs

@@ -2,7 +2,7 @@
 <Wix xmlns="http://schemas.microsoft.com/wix/2006/wi">
     <!-- TODO: Change paths and names accordingly -->
     <?define TargetPath="..\..\..\target\$(var.TARGET)\release"?>
-    <?define RustupCustomActionDll="$(var.TargetPath)\deps\rustup_msi.dll"?>
+    <?define RustupCustomActionDll="$(var.TargetPath)\rustup_msi.dll"?>
     <?define RustupExe="$(var.TargetPath)\rustup-init.exe"?>
 
     <Product Id="*" Name="rustup" Language="1033" Version="$(env.CFG_VER_MAJOR).$(env.CFG_VER_MINOR).$(env.CFG_VER_PATCH).0" Manufacturer="The Rust Project Developers" UpgradeCode="09acbb1c-7123-44ac-b2a9-4a04b28ced11">

src/rustup-win-installer/src/lib.rs

@@ -15,7 +15,7 @@ pub const LOGMSG_STANDARD: i32 = 2;
 
 // TODO: share this with self_update.rs
 static TOOLS: &'static [&'static str]
-    = &["rustc", "rustdoc", "cargo", "rust-lldb", "rust-gdb"];
+    = &["rustc", "rustdoc", "cargo", "rust-lldb", "rust-gdb", "rls"];
 
 #[no_mangle]
 /// This is run as an `immediate` action early in the install sequence