add appveyor config trial

Author: huangjj27

appveyor.yml

@@ -0,0 +1,77 @@
+image: Visual Studio 2017
+environment:
+  RUSTFLAGS: -Ctarget-feature=+crt-static
+  matrix:
+  - TARGET: x86_64-pc-windows-msvc
+    ALLOW_PR: 1
+  - TARGET: i686-pc-windows-msvc
+  - TARGET: i686-pc-windows-msvc
+    BUILD_MSI: 1
+  - TARGET: i686-pc-windows-gnu
+    MINGW_DIR: mingw32
+  - TARGET: x86_64-pc-windows-gnu
+    MINGW_DIR: mingw64
+  access_token:
+    secure: q8Wqx0brgfpOYFQqWauvucE2h0o1WYb41a3gKaCKV9QiE4eTz6qLNlqyC3mdsp4Q
+branches:
+  # only:
+  #   - master
+    - auto
+
+install:
+  # If this is a PR and we're not allowed to test PRs, skip the whole build.
+  # Also if we're on the master branch no need to run the full test suite, so
+  # just do a smoke test.
+  - if defined APPVEYOR_PULL_REQUEST_NUMBER if NOT defined ALLOW_PR appveyor exit
+  - if "%APPVEYOR_REPO_BRANCH%" == "master" if NOT defined ALLOW_PR appveyor exit
+
+  # Install MSYS2 and MINGW (32-bit & 64-bit)
+  - ps: |
+      # Check if MSYS2 was restored from cache
+      if($env:MINGW_DIR) {
+        if($env:MINGW_DIR -eq "mingw32") {
+          # Download and install MINGW (32-bit)
+          Write-Host "Installing MinGW (32-bit)..." -ForegroundColor Cyan
+          Write-Host "Downloading installation package..."
+          appveyor-retry appveyor DownloadFile https://s3.amazonaws.com/rust-lang-ci/i686-4.9.2-release-win32-dwarf-rt_v4-rev4.7z -FileName mingw.7z
+        } elseif($env:MINGW_DIR -eq "mingw64") {
+          # Download and install MINGW (64-bit)
+          Write-Host "Installing MinGW (64-bit)..." -ForegroundColor Cyan
+          Write-Host "Downloading installation package..."
+          appveyor-retry appveyor DownloadFile https://s3.amazonaws.com/rust-lang-ci/x86_64-4.9.2-release-win32-seh-rt_v4-rev4.7z -FileName mingw.7z
+        }
+        Write-Host "Extracting installation package..."
+        7z x -y mingw.7z -oC:\msys64 | Out-Null
+        del mingw.7z
+      } else {
+        Write-Host "MSYS2 not required" -ForegroundColor Green
+      }
+
+  # Install rust, x86_64-pc-windows-msvc host
+  - appveyor-retry appveyor DownloadFile https://win.rustup.rs/ -FileName rustup-init.exe
+  - rustup-init.exe -y --default-host=x86_64-pc-windows-msvc
+  - set PATH=%PATH%;C:\Users\appveyor\.cargo\bin
+
+  # Install the target we're compiling for
+  - if NOT "%TARGET%" == "x86_64-pc-windows-msvc" rustup target add %TARGET%
+
+  # add mingw to PATH if necessary
+  - if defined MINGW_DIR set PATH=C:\msys64\%MINGW_DIR%\bin;C:\msys64\usr\bin;%PATH%
+
+  # set cargo features for MSI if requested (otherwise empty string)
+  - set FEATURES=
+  - if defined BUILD_MSI set FEATURES=--features msi-installed
+
+  # let's see what we got
+  - where gcc rustc cargo
+  - rustc -vV
+  - cargo -vV
+
+build: false
+
+test_script:
+  - cargo build --release --target %TARGET% %FEATURES% --locked
+  - cargo test --release -p rustup-dist --target %TARGET%
+  - cargo test --release --target %TARGET% %FEATURES%
+  - 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