Support win32 build

Also use sccache releases instead of building with cargo.

.appveyor.yml

@@ -2,19 +2,21 @@ branches:
   except:
     - dev
 version: '{build}'
+platform:
+  - x64
+  - x86
 image: Visual Studio 2017
 install:
   - cinst ninja
 cache:
-  - '%USERPROFILE%\.cargo\bin'
   - '%LOCALAPPDATA%\Mozilla\sccache'
 build_script:
   - bash ./tools/import-upstream.sh
   - bash -c 'cd src; ./get-clang.sh'
   - bash -c '~/.cargo/bin/sccache -s'
-  - bash -c 'cd src; ./build.sh'
+  - bash -c 'cd src; EXTRA_FLAGS=target_cpu=\"$PLATFORM\" ./build.sh'
   - bash -c '~/.cargo/bin/sccache -s'
-  - ps: $env:BUILD_NAME="naiveproxy-$env:APPVEYOR_REPO_TAG_NAME-win64"
+  - ps: $env:BUILD_NAME="naiveproxy-$env:APPVEYOR_REPO_TAG_NAME-win-$env:PLATFORM"
   - bash -c 'mkdir $BUILD_NAME'
   - bash -c 'cp src/out/Release/naive.exe src/config.json LICENSE USAGE.txt $BUILD_NAME'
   - bash -c '7z a $BUILD_NAME.zip $BUILD_NAME'

src/build.sh

@@ -6,16 +6,16 @@ mkdir -p "$TMPDIR"
 
 if [ "$1" = debug ]; then
   out=out/Debug
-  flags='
+  flags="$EXTRA_FLAGS
     is_debug=true
-    is_component_build=true'
+    is_component_build=true"
 else
   out=out/Release
-  flags='
+  flags="$EXTRA_FLAGS
     is_official_build=true
     use_jumbo_build=true
     exclude_unwind_tables=true
-    symbol_level=0'
+    symbol_level=0"
 fi
 
 if which ccache >/dev/null 2>&1; then

src/get-clang.sh

@@ -31,14 +31,9 @@ fi
 
 # sccache (Windows)
 if [ "$ARCH" = Windows ]; then
-  export PATH="$PATH:$HOME/.cargo/bin"
-  if ! which cargo >/dev/null 2>&1; then
-    curl -OJ https://win.rustup.rs/
-    ./rustup-init.exe -y -v --no-modify-path
-  fi
-  if ! which sccache >/dev/null 2>&1; then
-    cargo install --git https://github.com/mozilla/sccache.git
-  fi
+  sccache_url="https://github.com/mozilla/sccache/releases/download/0.2.8/sccache-0.2.8-x86_64-pc-windows-msvc.tar.gz"
+  mkdir -p ~/.cargo/bin
+  curl -L "$sccache_url" | tar xzf - --strip=1 -C ~/.cargo/bin
 fi
 
 # gn