Launch Flutter Tools on Windows. (#7613)

This brings the Windows script up to par with the Linux/Mac script.

`flutter doctor` works.

There are two scripts (`bin/flutter` and `bin/internal/update_dart-sdk`), which are platform dependent (bash script on Linux/Max, PowerShell script on Windows) and we need to keep an eye on making sure that their logic stays in sync. Both scripts are rather simple and I am not expecting many changes to them. I also made sure that both versions follow the same structure to make it easier to keep them consistent.

Required for https://github.com/flutter/flutter/issues/138

bin/flutter

@@ -3,6 +3,15 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+
+# ---------------------------------- NOTE ---------------------------------- #
+#
+# Please keep the logic in this file consistent with the logic in the
+# `flutter.ps1` script in the same directory to ensure that Flutter continues
+# to work across all platforms!
+#
+# -------------------------------------------------------------------------- #
+
 set -e
 
 function follow_links() {
@@ -35,6 +44,18 @@ SCRIPT_PATH="$FLUTTER_TOOLS_DIR/bin/flutter_tools.dart"
 DART_SDK_PATH="$FLUTTER_ROOT/bin/cache/dart-sdk"
 
 DART="$DART_SDK_PATH/bin/dart"
+PUB="$DART_SDK_PATH/bin/pub"
+
+# Test if Git is available on the Host
+if ! hash git 2>/dev/null; then
+  echo "Error: Unable to find git in your PATH."
+  exit 1
+fi
+# Test if the flutter directory is a git clone (otherwise git rev-parse HEAD would fail)
+if [ ! -d "$FLUTTER_ROOT/.git" ]; then
+  echo "Error: The Flutter directory is not a clone of the GitHub project."
+  exit 1
+fi
 
 # To debug the tool, you can uncomment the following line to enable checked mode and set an observatory port:
 # FLUTTER_TOOL_ARGS="--observe=65432 --checked"
@@ -51,8 +72,7 @@ DART="$DART_SDK_PATH/bin/dart"
     "$FLUTTER_ROOT/bin/internal/update_dart_sdk.sh"
 
     echo Building flutter tool...
-    FLUTTER_DIR="$FLUTTER_ROOT/packages/flutter"
-    (cd "$FLUTTER_TOOLS_DIR"; rm -f pubspec.lock; "../../bin/cache/dart-sdk/bin/pub" get --verbosity=error --no-packages-dir)
+    (cd "$FLUTTER_TOOLS_DIR"; rm -f pubspec.lock; "$PUB" get --verbosity=error --no-packages-dir)
     "$DART" --snapshot="$SNAPSHOT_PATH" --packages="$FLUTTER_TOOLS_DIR/.packages" "$SCRIPT_PATH"
     echo $REVISION > "$STAMP_PATH"
   fi

bin/flutter.bat

-@ECHO off
-REM Copyright 2015 The Chromium Authors. All rights reserved.
-REM Use of this source code is governed by a BSD-style license that can be
-REM found in the LICENSE file.
-
-SETLOCAL ENABLEDELAYEDEXPANSION
-FOR %%i IN ("%~dp0..") DO SET "flutter_root=%%~fi" REM Get the parent directory
-SET flutter_tools_dir=%flutter_root%\packages\flutter_tools
-SET flutter_dir=%flutter_root%\packages\flutter
-SET snapshot_path=%flutter_root%\bin\cache\flutter_tools.snapshot
-SET stamp_path=%flutter_root%\bin\cache\flutter_tools.stamp
-SET script_path=%flutter_tools_dir%\bin\flutter_tools.dart
-REM TODO: Don't require dart to be on the user's path
-SET dart=dart
-
-REM Set current working directory to the flutter directory
-PUSHD %flutter_root%
-REM IF doesn't have an "or". Instead, just use GOTO
-FOR /f %%r IN ('git rev-parse HEAD') DO SET revision=%%r
-IF NOT EXIST %snapshot_path% GOTO do_snapshot
-IF NOT EXIST %stamp_path% GOTO do_snapshot
-FOR /f "delims=" %%x in (%stamp_path%) do set stamp_value=%%x
-IF "!stamp_value!" NEQ "!revision!" GOTO do_snapshot
-
-REM Getting modified timestamps in a batch file is ... troublesome
-REM More info: http://stackoverflow.com/questions/1687014/how-do-i-compare-timestamps-of-files-in-a-dos-batch-script
-FOR %%f IN (%flutter_tools_dir%\pubspec.yaml) DO SET yamlt=%%~tf
-FOR %%a IN (%flutter_tools_dir%\pubspec.lock) DO SET lockt=%%~ta
-IF !lockt! LSS !yamlt! GOTO do_snapshot
-
-GOTO :after_snapshot
-
-:do_snapshot
-CD "%flutter_tools_dir%"
-ECHO Updating flutter tool...
-CALL pub.bat get
-CD "%flutter_dir%"
-REM Allows us to check if sky_engine's REVISION is correct
-CALL pub.bat get
-CD "%flutter_root%"
-CALL %dart% --snapshot="%snapshot_path%" --packages="%flutter_tools_dir%\.packages" "%script_path%"
-<nul SET /p=%revision%> "%stamp_path%"
-
-:after_snapshot
-
-REM Go back to last working directory
-POPD
-CALL %dart% "%snapshot_path%" %*
-
-IF /I "%ERRORLEVEL%" EQU "253" (
-   CALL %dart% --snapshot="%snapshot_path%" --packages="%flutter_tools_dir%\.packages" "%script_path%"
-   CALL %dart% "%snapshot_path%" %*
-)

bin/flutter.ps1

-# Copyright 2015 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# How to use this script:
-#  - Allow the execution of PowerShell scripts (ByPass, etc.), for example:
-#     Set-ExecutionPolicy Unrestricted
-#  - Invoke any flutter command: Flutter.ps1 doctor
-#  - Force the path to Dart SDK: Flutter.ps1 -DartPath "c:\tools\dart\"
-
-[CmdletBinding()]
-param (
-  [Parameter(Mandatory=$False)]
-  [string]$DartPath,
-  [Parameter(Mandatory=$False)]
-  [switch]$Diag,
-  [parameter(mandatory=$False, position=1, ValueFromRemainingArguments=$true)]
-  $Remaining
-)
-
-# This function creates a snapshot of the latest version of flutter framework
-function Do-Snapshot
-{
-	Set-Location $flutterToolsDir
-	Write-Host "Info: Updating flutter tool..."
-	Invoke-Expression "pub.bat get $(&{If($Diag) {"--verbose"}})" 
-	Set-Location $flutterDir
-	# Allows us to check if sky_engine's REVISION is correct
-	Write-Host "Info: Updating sky engine..."
-	Invoke-Expression "pub.bat get $(&{If($Diag) {"--verbose"}})"
-	Set-Location $flutterRoot
-	Invoke-Expression "$dartExe --snapshot=`"$snapshotPath`" `"$scriptPath`" --packages=`"$flutterToolsDir\.packages`""
-	$revision | Out-File  $stampPath
-}
-
-# Save the current location
-Push-Location
-
-# Get the parent directory
-$scriptPath = split-path -parent $MyInvocation.MyCommand.Definition
-$flutterRoot = (get-item $scriptPath ).parent.FullName
-
-$flutterToolsDir = $flutterRoot + '\packages\flutter_tools'
-$flutterDir = $flutterRoot + '\packages\flutter'
-$snapshotPath = $flutterRoot + '\bin\cache\flutter_tools.snapshot'
-$stampPath = $flutterRoot + '\bin\cache\flutter_tools.stamp'
-$scriptPath = $flutterToolsDir + '\bin\flutter_tools.dart'
-$dartExe = [io.path]::combine($DartPath, 'dart.exe')
-
-# Set current working directory to the flutter directory
-Set-Location $flutterRoot
-
-# Test if Git is available on the Host
-if ((Get-Command "git.exe" -ErrorAction SilentlyContinue) -eq $null) { 
-   Write-Host "Error: Unable to find git.exe in your PATH"
-   Pop-Location
-   exit
-}
-# Test if the flutter directory is a git clone (otherwise git rev-parse HEAD would fail)
-if (-not (Test-Path '.git')) {
-   Write-Host "Error: The flutter directory is not a clone of the GH project"
-   Pop-Location
-   exit
-}
-# Test if pub.bat is available on the Host
-if ((Get-Command "pub.bat" -ErrorAction SilentlyContinue) -eq $null) { 
-   Write-Host "Error: Unable to find Dart SDK in your PATH"
-   Pop-Location
-   exit
-}
-
-# Check if the snapshot version is out-of-date.
-$revision = Invoke-Expression "git rev-parse HEAD"
-if ( (-not (Test-Path $snapshotPath)) -Or (-not (Test-Path $stampPath)) ) {
-	Write-Host "Info: Snapshot doesn't exist"
-	Do-Snapshot
-}
-$stampValue = Get-Content $stampPath | Where-Object {$_ -match '\S'}
-if ($stampValue -ne $revision) {
-	Write-Host "Info: Timestamp differs from revision"
-	Do-Snapshot
-}
-$yamltLastWriteTime = (ls "$flutterToolsDir\pubspec.yaml").LastWriteTime
-$locktLastWriteTime = (ls "$flutterToolsDir\pubspec.lock").LastWriteTime
-if ($locktLastWriteTime -lt $yamltLastWriteTime) {
-	Write-Host "Info: Mismatch between yaml and lock files"
-	Do-Snapshot
-}
-
-# Go back to last working directory
-Pop-Location
-Invoke-Expression "$dartExe `"$snapshotPath`" $Remaining"
-
-# The VM exits with code 253 if the snapshot version is out-of-date.
-if ($LASTEXITCODE -eq 253) {
-	Write-Host "Info: VM exited with code 253, we need to snapshot it again."
-	Invoke-Expression "$dartExe --snapshot=`"$snapshotPath`" `"$scriptPath`" --packages=`"$flutterToolsDir\.packages`""
-	Invoke-Expression "$dartExe `"$snapshotPath`" $Remaining"
-}
+# Copyright 2017 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+
+# ---------------------------------- NOTE ---------------------------------- #
+#
+# Please keep the logic in this file consistent with the logic in the
+# `flutter` script in the same directory to ensure that Flutter continues to
+# work across all platforms!
+#
+# -------------------------------------------------------------------------- #
+
+$ErrorActionPreference = "Stop"
+
+$progName = split-path -parent $MyInvocation.MyCommand.Definition
+$flutterRoot = (get-item $progName ).parent.FullName
+$env:FLUTTER_ROOT = $flutterRoot
+
+$flutterToolsDir =  "$flutterRoot\packages\flutter_tools"
+$snapshotPath = "$flutterRoot\bin\cache\flutter_tools.snapshot"
+$stampPath = "$flutterRoot\bin\cache\flutter_tools.stamp"
+$scriptPath = "$flutterToolsDir\bin\flutter_tools.dart"
+$dartSdkPath = "$flutterRoot\bin\cache\dart-sdk"
+
+$dart = "$dartSdkPath\bin\dart.exe"
+$pub = "$dartSdkPath\bin\pub.bat"
+
+# Test if Git is available on the Host
+if ((Get-Command "git.exe" -ErrorAction SilentlyContinue) -eq $null) { 
+   Write-Host "Error: Unable to find git.exe in your PATH."
+   exit
+}
+# Test if the flutter directory is a git clone (otherwise git rev-parse HEAD would fail)
+if (-not (Test-Path "$flutterRoot\.git")) {
+   Write-Host "Error: The Flutter directory is not a clone of the GitHub project."
+   exit
+}
+
+Push-Location
+Set-Location $flutterRoot
+$revision = Invoke-Expression "git rev-parse HEAD"
+Pop-Location
+
+if (!(Test-Path $snapshotPath) `
+        -or !(Test-Path $stampPath) `
+        -or ((Get-Content $stampPath) -ne  $revision) `
+        -or !(Test-Path "$flutterToolsDir\pubspec.lock") `
+        -or ((ls "$flutterToolsDir\pubspec.lock").LastWriteTime -lt (ls "$flutterToolsDir\pubspec.yaml").LastWriteTime)) {
+    New-Item "$flutterRoot\bin\cache" -force -type directory | Out-Null
+    New-Item "$flutterRoot\bin\cache\.dartignore" -force -type file | Out-Null
+    Invoke-Expression "$flutterRoot\bin\internal\update_dart_sdk.ps1"
+
+    Write-Host "Building flutter tool..."
+    Set-Location $flutterToolsDir
+    if (Test-Path "$flutterToolsDir\pubspec.lock") { Remove-Item "$flutterToolsDir\pubspec.lock" }
+    Invoke-Expression "$pub get --verbosity=error --no-packages-dir" 
+    Set-Location $flutterRoot
+    Invoke-Expression "$dart --snapshot=`"$snapshotPath`" `"$scriptPath`" --packages=`"$flutterToolsDir\.packages`""
+    $revision | Out-File  $stampPath
+}
+
+Invoke-Expression "$dart `"$snapshotPath`" $args"
+
+# The VM exits with code 253 if the snapshot version is out-of-date.
+if ($LASTEXITCODE -eq 253) {
+    Invoke-Expression "$dart --snapshot=`"$snapshotPath`" `"$scriptPath`" --packages=`"$flutterToolsDir\.packages`""
+    Invoke-Expression "$dart `"$snapshotPath`" $args"
+}

bin/internal/update_dart_sdk.ps1

+# Copyright 2017 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+
+# ---------------------------------- NOTE ---------------------------------- #
+#
+# Please keep the logic in this file consistent with the logic in the
+# `update_dart_sdk.sh` script in the same directory to ensure that Flutter
+# continues to work across all platforms!
+#
+# -------------------------------------------------------------------------- #
+
+$ErrorActionPreference = "Stop"
+
+$progName = split-path -parent $MyInvocation.MyCommand.Definition
+$flutterRoot = (get-item $progName ).parent.parent.FullName
+
+$dartSdkPath = "$flutterRoot\bin\cache\dart-sdk"
+$dartSdkStampPath = "$flutterRoot\bin\cache\dart-sdk.stamp"
+$dartSdkVersion = (Get-Content "$flutterRoot\bin\internal\dart-sdk.version")
+
+if ((Test-Path $dartSdkStampPath) -and ($dartSdkVersion -eq (Get-Content $dartSdkStampPath))) {
+    return
+}
+
+Write-Host "Downloading Dart SDK $dartSdkVersion..."
+$dartZipName = "dartsdk-windows-x64-release.zip"
+$dartChannel = if ($dartSdkVersion.Contains("-dev.")) {"dev"} else {"stable"}
+$dartSdkUrl = "https://storage.googleapis.com/dart-archive/channels/$dartChannel/raw/$dartSdkVersion/sdk/$dartZipName"
+
+if (Test-Path $dartSdkPath) { Remove-Item $dartSdkPath -Recurse }
+New-Item $dartSdkPath -force -type directory | Out-Null
+$dartSdkZip = "$flutterRoot\bin\cache\dart-sdk.zip"
+
+Start-BitsTransfer -Source $dartSdkUrl -Destination $dartSdkZip
+Add-Type -assembly "system.io.compression.filesystem"
+[io.compression.zipfile]::ExtractToDirectory($dartSdkZip, "$flutterRoot\bin\cache")
+Remove-Item $dartSdkZip
+$dartSdkVersion | out-file $dartSdkStampPath

bin/internal/update_dart_sdk.sh

@@ -3,6 +3,15 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+
+# ---------------------------------- NOTE ---------------------------------- #
+#
+# Please keep the logic in this file consistent with the logic in the
+# `update_dart_sdk.ps1` script in the same directory to ensure that Flutter
+# continues to work across all platforms!
+#
+# -------------------------------------------------------------------------- #
+
 set -e
 
 FLUTTER_ROOT="$(dirname "$(dirname "$(dirname "${BASH_SOURCE[0]}")")")"