Add AppVeyor configuration

appveyor.yml

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+# Appveyor configuration template for Rust
+# https://github.com/starkat99/appveyor-rust
+
+os: Visual Studio 2015
+
+environment:
+  matrix:
+### MSVC Toolchains ###
+  # Stable 64-bit MSVC
+    - channel: stable
+      target: x86_64-pc-windows-msvc
+  # Stable 32-bit MSVC
+    - channel: stable
+      target: i686-pc-windows-msvc
+  # Beta 64-bit MSVC
+    - channel: beta
+      target: x86_64-pc-windows-msvc
+  # Beta 32-bit MSVC
+    - channel: beta
+      target: i686-pc-windows-msvc
+  # Nightly 64-bit MSVC
+    - channel: nightly
+      target: x86_64-pc-windows-msvc
+  # Nightly 32-bit MSVC
+    - channel: nightly
+      target: i686-pc-windows-msvc
+
+### GNU Toolchains ###
+  # Stable 64-bit GNU
+    - channel: stable
+      target: x86_64-pc-windows-gnu
+  # Stable 32-bit GNU
+    - channel: stable
+      target: i686-pc-windows-gnu
+  # Beta 64-bit GNU
+    - channel: beta
+      target: x86_64-pc-windows-gnu
+  # Beta 32-bit GNU
+    - channel: beta
+      target: i686-pc-windows-gnu
+  # Nightly 64-bit GNU
+    - channel: nightly
+      target: x86_64-pc-windows-gnu
+  # Nightly 32-bit GNU
+    - channel: nightly
+      target: i686-pc-windows-gnu
+
+### Allowed failures ###
+
+# See Appveyor documentation for specific details. In short, place any channel or targets you wish
+# to allow build failures on (usually nightly at least is a wise choice). This will prevent a build
+# or test failure in the matching channels/targets from failing the entire build.
+matrix:
+  allow_failures:
+    - channel: nightly
+    - target: i686-pc-windows-msvc
+
+## Install Script ##
+install:
+- ps: .\tools\install.ps1
+
+## Build Script ##
+# 'cargo test' takes care of building for us, so disable Appveyor's build stage. This prevents
+# the "directory does not contain a project or solution file" error.
+build: false
+
+# Uses 'cargo test' to run tests. Alternatively, the project may call compiled programs directly or
+# perform other testing commands. Rust will automatically be placed in the PATH environment
+# variable.
+test_script:
+- cmd: make all

tools/install.ps1

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+##### Appveyor Rust Install Script #####
+
+# https://github.com/starkat99/appveyor-rust
+
+# This is the most important part of the Appveyor configuration. This installs the version of Rust
+# specified by the "channel" and "target" environment variables from the build matrix. By default,
+# Rust will be installed to C:\Rust for easy usage, but this path can be overridden by setting the
+# RUST_INSTALL_DIR environment variable. The URL to download rust distributions defaults to
+# https://static.rust-lang.org/dist/ but can overridden by setting the RUST_DOWNLOAD_URL environment
+# variable.
+#
+# For simple configurations, instead of using the build matrix, you can override the channel and
+# target environment variables with the --channel and --target script arguments.
+#
+# If no channel or target arguments or environment variables are specified, will default to stable
+# channel and x86_64-pc-windows-msvc target.
+
+param([string]$channel=${env:channel}, [string]$target=${env:target})
+
+# Initialize our parameters from arguments and environment variables, falling back to defaults
+if (!$channel) {
+    $channel = "stable"
+}
+if (!$target) {
+    $target = "x86_64-pc-windows-msvc"
+}
+
+$downloadUrl = "https://static.rust-lang.org/dist/"
+if ($env:RUST_DOWNLOAD_URL) {
+    $downloadUrl = $env:RUST_DOWNLOAD_URL
+}
+
+$installDir = "C:\Rust"
+if ($env:RUST_INSTALL_DIR) {
+    $installUrl = $env:RUST_INSTALL_DIR
+}
+
+if ($channel -eq "stable") {
+    # Download manifest so we can find actual filename of installer to download. Needed for stable.
+    echo "Downloading $channel channel manifest"
+    $manifest = "${env:Temp}\channel-rust-${channel}"
+    Start-FileDownload "${downloadUrl}channel-rust-${channel}" -FileName "$manifest"
+
+    # Search the manifest lines for the correct filename based on target
+    $match = Get-Content "$manifest" | Select-String -pattern "${target}.exe" -simplematch
+
+    if (!$match -or !$match.line) {
+        throw "Could not find $target in $channel channel manifest"
+    }
+
+    $installer = $match.line
+} else {
+    # Otherwise download the file specified by channel directly.
+    $installer = "rust-${channel}-${target}.exe"
+}
+
+# Download installer
+echo "Downloading ${downloadUrl}$installer"
+Start-FileDownload "${downloadUrl}$installer" -FileName "${env:Temp}\$installer"
+
+# Execute installer and wait for it to finish
+echo "Installing $installer to $installDir"
+&"${env:Temp}\$installer" /VERYSILENT /NORESTART /DIR="$installDir" | Write-Output
+
+# Add Rust to the path.
+$env:Path += ";${installDir}\bin;C:\MinGW\bin"
+
+echo "Installation of $channel Rust $target completed"
+
+# Test and display installed version information for rustc and cargo
+rustc -V
+cargo -V