Add appveyor setup to build and unit test

Adds a `make.ps1` powershell script to make it easy to compile and test.

```
.\scripts\make.ps1 -Binary
INFO: make.ps1 starting at 03/01/2018 14:37:28
INFO: Building...

 ________   ____  __.
 \_____  \ |    |/ _|
 /   |   \|      <
 /    |    \    |  \
 \_______  /____|__ \
         \/        \/

INFO: make.ps1 ended at 03/01/2018 14:37:30

.\scripts\make.ps1 -TestUnit
```

The next step is to run e2e tests on windows too.

Signed-off-by: Vincent Demeester <vincent@sbr.pm>

appveyor.yml

@@ -0,0 +1,23 @@
+version: "{build}"
+
+clone_folder: c:\gopath\src\github.com\docker\cli
+
+environment:
+  GOPATH: c:\gopath
+  GOVERSION: 1.10
+  DEPVERSION: v0.4.1
+
+install:
+  - rmdir c:\go /s /q
+  - appveyor DownloadFile https://storage.googleapis.com/golang/go%GOVERSION%.windows-amd64.msi
+  - msiexec /i go%GOVERSION%.windows-amd64.msi /q
+  - go version
+  - go env
+
+deploy: false
+
+build_script:
+  - ps: .\scripts\make.ps1 -Binary
+
+test_script:
+  - ps: .\scripts\make.ps1 -TestUnit

scripts/make.ps1

@@ -0,0 +1,197 @@
+<#
+.NOTES
+    Author:  @vdemeester
+
+    Summary: Windows native build script.
+
+             It does however provided the minimum necessary to support parts of local Windows
+             development and Windows to Windows CI.
+
+             Usage Examples (run from repo root):
+                "hack\make.ps1 -Client" to build docker.exe client 64-bit binary (remote repo)
+                "hack\make.ps1 -TestUnit" to run unit tests
+                "hack\make.ps1 -Daemon -TestUnit" to build the daemon and run unit tests
+                "hack\make.ps1 -All" to run everything this script knows about that can run in a container
+                "hack\make.ps1" to build the daemon binary (same as -Daemon)
+                "hack\make.ps1 -Binary" shortcut to -Client and -Daemon
+
+.PARAMETER Binary
+     Builds the client and daemon binaries. A convenient shortcut to `make.ps1 -Client -Daemon`.
+
+.PARAMETER Race
+     Use -race in go build and go test.
+
+.PARAMETER Noisy
+     Use -v in go build.
+
+.PARAMETER ForceBuildAll
+     Use -a in go build.
+
+.PARAMETER NoOpt
+     Use -gcflags -N -l in go build to disable optimisation (can aide debugging).
+
+.PARAMETER CommitSuffix
+     Adds a custom string to be appended to the commit ID (spaces are stripped).
+
+.PARAMETER TestUnit
+     Runs unit tests.
+
+.PARAMETER All
+     Runs everything this script knows about that can run in a container.
+
+
+TODO
+- Unify the head commit
+- Add golint and other checks (swagger maybe?)
+
+#>
+
+
+param(
+    [Parameter(Mandatory=$False)][switch]$Binary,
+    [Parameter(Mandatory=$False)][switch]$Race,
+    [Parameter(Mandatory=$False)][switch]$Noisy,
+    [Parameter(Mandatory=$False)][switch]$ForceBuildAll,
+    [Parameter(Mandatory=$False)][switch]$NoOpt,
+    [Parameter(Mandatory=$False)][switch]$TestUnit,
+    [Parameter(Mandatory=$False)][switch]$All
+)
+
+$ErrorActionPreference = "Stop"
+$ProgressPreference = "SilentlyContinue"
+$pushed=$False  # To restore the directory if we have temporarily pushed to one.
+
+# Utility function to get the commit ID of the repository
+Function Get-GitCommit() {
+    if (-not (Test-Path ".\.git")) {
+        # If we don't have a .git directory, but we do have the environment
+        # variable DOCKER_GITCOMMIT set, that can override it.
+        if ($env:DOCKER_GITCOMMIT.Length -eq 0) {
+            Throw ".git directory missing and DOCKER_GITCOMMIT environment variable not specified."
+        }
+        Write-Host "INFO: Git commit ($env:DOCKER_GITCOMMIT) assumed from DOCKER_GITCOMMIT environment variable"
+        return $env:DOCKER_GITCOMMIT
+    }
+    $gitCommit=$(git rev-parse --short HEAD)
+    if ($(git status --porcelain --untracked-files=no).Length -ne 0) {
+        $gitCommit="$gitCommit-unsupported"
+        Write-Host ""
+        Write-Warning "This version is unsupported because there are uncommitted file(s)."
+        Write-Warning "Either commit these changes, or add them to .gitignore."
+        git status --porcelain --untracked-files=no | Write-Warning
+        Write-Host ""
+    }
+    return $gitCommit
+}
+
+# Build a binary (client or daemon)
+Function Execute-Build($additionalBuildTags, $directory) {
+    # Generate the build flags
+    $buildTags = "autogen"
+    if ($Noisy)                     { $verboseParm=" -v" }
+    if ($Race)                      { Write-Warning "Using race detector"; $raceParm=" -race"}
+    if ($ForceBuildAll)             { $allParm=" -a" }
+    if ($NoOpt)                     { $optParm=" -gcflags "+""""+"-N -l"+"""" }
+    if ($additionalBuildTags -ne "") { $buildTags += $(" " + $additionalBuildTags) }
+
+    # Do the go build in the appropriate directory
+    # Note -linkmode=internal is required to be able to debug on Windows.
+    # https://github.com/golang/go/issues/14319#issuecomment-189576638
+    Write-Host "INFO: Building..."
+    Push-Location $root\cmd\$directory; $global:pushed=$True
+    $buildCommand = "go build" + `
+                    $raceParm + `
+                    $verboseParm + `
+                    $allParm + `
+                    $optParm + `
+                    " -tags """ + $buildTags + """" + `
+                    " -ldflags """ + "-linkmode=internal" + """" + `
+                    " -o $root\build\"+$directory+".exe"
+    Invoke-Expression $buildCommand
+    if ($LASTEXITCODE -ne 0) { Throw "Failed to compile" }
+    Pop-Location; $global:pushed=$False
+}
+
+# Run the unit tests
+Function Run-UnitTests() {
+    Write-Host "INFO: Running unit tests..."
+    $testPath="./..."
+    $goListCommand = "go list -e -f '{{if ne .Name """ + '\"github.com/docker/cli\"' + """}}{{.ImportPath}}{{end}}' $testPath"
+    $pkgList = $(Invoke-Expression $goListCommand)
+    if ($LASTEXITCODE -ne 0) { Throw "go list for unit tests failed" }
+    $pkgList = $pkgList | Select-String -Pattern "github.com/docker/cli"
+    $pkgList = $pkgList | Select-String -NotMatch "github.com/docker/cli/vendor"
+    $pkgList = $pkgList | Select-String -NotMatch "github.com/docker/cli/man"
+    $pkgList = $pkgList | Select-String -NotMatch "github.com/docker/cli/e2e"
+    $pkgList = $pkgList -replace "`r`n", " "
+    $goTestCommand = "go test" + $raceParm + " -cover -ldflags -w -tags """ + "autogen" + """ -a """ + "-test.timeout=10m" + """ $pkgList"
+    Invoke-Expression $goTestCommand
+    if ($LASTEXITCODE -ne 0) { Throw "Unit tests failed" }
+}
+
+# Start of main code.
+Try {
+    Write-Host -ForegroundColor Cyan "INFO: make.ps1 starting at $(Get-Date)"
+
+    # Get to the root of the repo
+    $root = $(Split-Path $MyInvocation.MyCommand.Definition -Parent | Split-Path -Parent)
+    Push-Location $root
+
+    # Handle the "-All" shortcut to turn on all things we can handle.
+    # Note we expressly only include the items which can run in a container - the validations tests cannot
+    # as they require the .git directory which is excluded from the image by .dockerignore
+    if ($All) { $Client=$True; $TestUnit=$True }
+
+    # Handle the "-Binary" shortcut to build both client and daemon.
+    if ($Binary) { $Client = $True; }
+
+    # Verify git is installed
+    if ($(Get-Command git -ErrorAction SilentlyContinue) -eq $nil) { Throw "Git does not appear to be installed" }
+
+    # Verify go is installed
+    if ($(Get-Command go -ErrorAction SilentlyContinue) -eq $nil) { Throw "GoLang does not appear to be installed" }
+
+    # Build the binaries
+    if ($Client) {
+        # Create the build directory if it doesn't exist
+        if (-not (Test-Path ".\build")) { New-Item ".\build" -ItemType Directory | Out-Null }
+
+        # Perform the actual build
+        Execute-Build "" "docker"
+    }
+
+    # Run unit tests
+    if ($TestUnit) { Run-UnitTests }
+
+    # Gratuitous ASCII art.
+    if ($Client) {
+        Write-Host
+        Write-Host -ForegroundColor Green " ________   ____  __."
+        Write-Host -ForegroundColor Green " \_____  \ `|    `|/ _`|"
+        Write-Host -ForegroundColor Green " /   `|   \`|      `<"
+        Write-Host -ForegroundColor Green " /    `|    \    `|  \"
+        Write-Host -ForegroundColor Green " \_______  /____`|__ \"
+        Write-Host -ForegroundColor Green "         \/        \/"
+        Write-Host
+    }
+}
+Catch [Exception] {
+    Write-Host -ForegroundColor Red ("`nERROR: make.ps1 failed:`n$_")
+
+    # More gratuitous ASCII art.
+    Write-Host
+    Write-Host -ForegroundColor Red  "___________      .__.__             .___"
+    Write-Host -ForegroundColor Red  "\_   _____/____  `|__`|  `|   ____   __`| _/"
+    Write-Host -ForegroundColor Red  " `|    __) \__  \ `|  `|  `| _/ __ \ / __ `| "
+    Write-Host -ForegroundColor Red  " `|     \   / __ \`|  `|  `|_\  ___// /_/ `| "
+    Write-Host -ForegroundColor Red  " \___  /  (____  /__`|____/\___  `>____ `| "
+    Write-Host -ForegroundColor Red  "     \/        \/             \/     \/ "
+    Write-Host
+
+    Throw $_
+}
+Finally {
+    Pop-Location # As we pushed to the root of the repo as the very first thing
+    if ($global:pushed) { Pop-Location }
+    Write-Host -ForegroundColor Cyan "INFO: make.ps1 ended at $(Get-Date)"
+}

scripts/validate/shellcheck

@@ -2,4 +2,4 @@
 set -eo pipefail
 
 shellcheck contrib/completion/bash/docker
-find scripts/ -type f | grep -v scripts/winresources | xargs shellcheck
+find scripts/ -type f | grep -v scripts/winresources | grep -v '*.ps1' | xargs shellcheck