bin/flutter.bat - mirrors/flutter - Git at Google

 @ECHO off
 REM Copyright 2014 The Flutter 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.

 REM ---------------------------------- NOTE ----------------------------------
 REM
 REM Please keep the logic in this file consistent with the logic in the
 REM `flutter` script in the same directory to ensure that Flutter continues to
 REM work across all platforms!
 REM
 REM --------------------------------------------------------------------------

 SETLOCAL ENABLEDELAYEDEXPANSION

 FOR %%i IN ("%~dp0..") DO SET FLUTTER_ROOT=%%~fi

 SET flutter_tools_dir=%FLUTTER_ROOT%\packages\flutter_tools
 SET cache_dir=%FLUTTER_ROOT%\bin\cache
 SET snapshot_path=%cache_dir%\flutter_tools.snapshot
 SET stamp_path=%cache_dir%\flutter_tools.stamp
 SET script_path=%flutter_tools_dir%\bin\flutter_tools.dart
 SET dart_sdk_path=%cache_dir%\dart-sdk
 SET engine_stamp=%cache_dir%\engine-dart-sdk.stamp
 SET engine_version_path=%FLUTTER_ROOT%\bin\internal\engine.version
 SET pub_cache_path=%FLUTTER_ROOT%\.pub-cache

 SET dart=%dart_sdk_path%\bin\dart.exe
 SET pub=%dart_sdk_path%\bin\pub.bat

 REM If available, add location of bundled mingit to PATH
 SET mingit_path=%FLUTTER_ROOT%\bin\mingit\cmd
 IF EXIST "%mingit_path%" SET PATH=%PATH%;%mingit_path%

 REM Test if Git is available on the Host
 where /q git || ECHO Error: Unable to find git in your PATH. && EXIT /B 1
 REM  Test if the flutter directory is a git clone, otherwise git rev-parse HEAD would fail
 IF NOT EXIST "%flutter_root%\.git" (
   ECHO Error: The Flutter directory is not a clone of the GitHub project.
   ECHO        The flutter tool requires Git in order to operate properly;
   ECHO        to set up Flutter, run the following command:
   ECHO        git clone -b stable https://github.com/flutter/flutter.git
   EXIT /B 1
 )

 REM Ensure that bin/cache exists.
 IF NOT EXIST "%cache_dir%" MKDIR "%cache_dir%"

 REM If the cache still doesn't exist, fail with an error that we probably don't have permissions.
 IF NOT EXIST "%cache_dir%" (
   ECHO Error: Unable to create cache directory at
   ECHO            %cache_dir%
   ECHO.
   ECHO        This may be because flutter doesn't have write permissions for
   ECHO        this path. Try moving the flutter directory to a writable location,
   ECHO        such as within your home directory.
   EXIT /B 1
 )


 REM To debug the tool, you can uncomment the following lines to enable checked mode and set an observatory port:
 REM SET FLUTTER_TOOL_ARGS="--enable-asserts %FLUTTER_TOOL_ARGS%"
 REM SET FLUTTER_TOOL_ARGS="%FLUTTER_TOOL_ARGS% --observe=65432"

 :acquire_lock
 2>NUL (
   REM "3" is now stderr because of "2>NUL".
   CALL :subroutine %* 2>&3 9> "%cache_dir%\flutter.bat.lock" || GOTO acquire_lock
 )
 GOTO :after_subroutine

 :subroutine
   PUSHD "%flutter_root%"
   FOR /f %%r IN ('git rev-parse HEAD') DO SET revision=%%r
   POPD

   REM The following IF conditions are all linked with a logical OR. However,
   REM there is no OR operator in batch and a GOTO construct is used as replacement.

   IF NOT EXIST "%engine_stamp%" GOTO do_sdk_update_and_snapshot
   SET /P dart_required_version=<"%engine_version_path%"
   SET /P dart_installed_version=<"%engine_stamp%"
   IF !dart_required_version! NEQ !dart_installed_version! GOTO do_sdk_update_and_snapshot
   IF NOT EXIST "%snapshot_path%" GOTO do_snapshot
   IF NOT EXIST "%stamp_path%" GOTO do_snapshot
   SET /P stamp_value=<"%stamp_path%"
   IF !stamp_value! NEQ !revision! GOTO do_snapshot
   SET pubspec_yaml_path=%flutter_tools_dir%\pubspec.yaml
   SET pubspec_lock_path=%flutter_tools_dir%\pubspec.lock
   FOR /F %%i IN ('DIR /B /O:D "%pubspec_yaml_path%" "%pubspec_lock_path%"') DO SET newer_file=%%i
   FOR %%i IN (%pubspec_yaml_path%) DO SET pubspec_yaml_timestamp=%%~ti
   FOR %%i IN (%pubspec_lock_path%) DO SET pubspec_lock_timestamp=%%~ti
   IF "%pubspec_yaml_timestamp%" == "%pubspec_lock_timestamp%" SET newer_file=""
   IF "%newer_file%" EQU "pubspec.yaml" GOTO do_snapshot

   REM Everything is up-to-date - exit subroutine
   EXIT /B

   :do_sdk_update_and_snapshot
     ECHO Checking Dart SDK version...
     SET update_dart_bin=%FLUTTER_ROOT%/bin/internal/update_dart_sdk.ps1
     REM Escape apostrophes from the executable path
     SET "update_dart_bin=!update_dart_bin:'=''!"
     PowerShell.exe -ExecutionPolicy Bypass -Command "Unblock-File -Path '%update_dart_bin%'; & '%update_dart_bin%'"
     IF "%ERRORLEVEL%" NEQ "0" (
       ECHO Error: Unable to update Dart SDK. Retrying...
       timeout /t 5 /nobreak
       GOTO :do_sdk_update_and_snapshot
     )

   :do_snapshot
     IF EXIST "%FLUTTER_ROOT%\version" DEL "%FLUTTER_ROOT%\version"
     ECHO: > "%cache_dir%\.dartignore"
     ECHO Building flutter tool...
     PUSHD "%flutter_tools_dir%"

     REM Makes changes to PUB_ENVIRONMENT only visible to commands within SETLOCAL/ENDLOCAL
     SETLOCAL
       SET VERBOSITY=--verbosity=error
       IF "%CI%" == "true" GOTO on_bot
       IF "%BOT%" == "true" GOTO on_bot
       IF "%CONTINUOUS_INTEGRATION%" == "true" GOTO on_bot
       IF "%CHROME_HEADLESS%" == "1" GOTO on_bot
       GOTO not_on_bot
       :on_bot
         SET PUB_ENVIRONMENT=%PUB_ENVIRONMENT%:flutter_bot
         SET VERBOSITY=--verbosity=normal
       :not_on_bot
       SET PUB_ENVIRONMENT=%PUB_ENVIRONMENT%:flutter_install
       IF "%PUB_CACHE%" == "" (
         IF EXIST "%pub_cache_path%" SET PUB_CACHE=%pub_cache_path%
       )

       SET /A total_tries=10
       SET /A remaining_tries=%total_tries%-1
       :retry_pub_upgrade
         ECHO Running pub upgrade...
         CALL "%pub%" upgrade "%VERBOSITY%" --no-precompile
         IF "%ERRORLEVEL%" EQU "0" goto :upgrade_succeeded
         ECHO Error (%ERRORLEVEL%): Unable to 'pub upgrade' flutter tool. Retrying in five seconds... (%remaining_tries% tries left)
         timeout /t 5 /nobreak 2>NUL
         SET /A remaining_tries-=1
         IF "%remaining_tries%" EQU "0" GOTO upgrade_retries_exhausted
         GOTO :retry_pub_upgrade
       :upgrade_retries_exhausted
         SET exit_code=%ERRORLEVEL%
         ECHO Error: 'pub upgrade' still failing after %total_tries% tries, giving up.
         GOTO final_exit
       :upgrade_succeeded
     ENDLOCAL

     POPD

     IF "%FLUTTER_TOOL_ARGS%" == "" (
       "%dart%" --snapshot="%snapshot_path%" --packages="%flutter_tools_dir%\.packages" --no-enable-mirrors "%script_path%"
     ) else (
       "%dart%" "%FLUTTER_TOOL_ARGS%" --snapshot="%snapshot_path%" --packages="%flutter_tools_dir%\.packages" "%script_path%"
     )
     IF "%ERRORLEVEL%" NEQ "0" (
       ECHO Error: Unable to create dart snapshot for flutter tool.
       SET exit_code=%ERRORLEVEL%
       GOTO :final_exit
     )
     >"%stamp_path%" ECHO %revision%

   REM Exit Subroutine
   EXIT /B

 :after_subroutine

 REM Chaining the call to 'dart' and 'exit' with an ampersand ensures that
 REM Windows reads both commands into memory once before executing them. This
 REM avoids nasty errors that may otherwise occur when the dart command (e.g. as
 REM part of 'flutter upgrade') modifies this batch script while it is executing.
 REM
 REM Do not use the CALL command in the next line to execute Dart. CALL causes
 REM Windows to re-read the line from disk after the CALL command has finished
 REM regardless of the ampersand chain.
 "%dart%" --packages="%flutter_tools_dir%\.packages" %FLUTTER_TOOL_ARGS% "%snapshot_path%" %* & exit /B !ERRORLEVEL!

 :final_exit
 EXIT /B %exit_code%
	@ECHO off
	REM Copyright 2014 The Flutter 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.

	REM ---------------------------------- NOTE ----------------------------------
	REM
	REM Please keep the logic in this file consistent with the logic in the
	REM `flutter` script in the same directory to ensure that Flutter continues to
	REM work across all platforms!
	REM
	REM --------------------------------------------------------------------------

	SETLOCAL ENABLEDELAYEDEXPANSION

	FOR %%i IN ("%~dp0..") DO SET FLUTTER_ROOT=%%~fi

	SET flutter_tools_dir=%FLUTTER_ROOT%\packages\flutter_tools
	SET cache_dir=%FLUTTER_ROOT%\bin\cache
	SET snapshot_path=%cache_dir%\flutter_tools.snapshot
	SET stamp_path=%cache_dir%\flutter_tools.stamp
	SET script_path=%flutter_tools_dir%\bin\flutter_tools.dart
	SET dart_sdk_path=%cache_dir%\dart-sdk
	SET engine_stamp=%cache_dir%\engine-dart-sdk.stamp
	SET engine_version_path=%FLUTTER_ROOT%\bin\internal\engine.version
	SET pub_cache_path=%FLUTTER_ROOT%\.pub-cache

	SET dart=%dart_sdk_path%\bin\dart.exe
	SET pub=%dart_sdk_path%\bin\pub.bat

	REM If available, add location of bundled mingit to PATH
	SET mingit_path=%FLUTTER_ROOT%\bin\mingit\cmd
	IF EXIST "%mingit_path%" SET PATH=%PATH%;%mingit_path%

	REM Test if Git is available on the Host
	where /q git \|\| ECHO Error: Unable to find git in your PATH. && EXIT /B 1
	REM Test if the flutter directory is a git clone, otherwise git rev-parse HEAD would fail
	IF NOT EXIST "%flutter_root%\.git" (
	ECHO Error: The Flutter directory is not a clone of the GitHub project.
	ECHO The flutter tool requires Git in order to operate properly;
	ECHO to set up Flutter, run the following command:
	ECHO git clone -b stable https://github.com/flutter/flutter.git
	EXIT /B 1
	)

	REM Ensure that bin/cache exists.
	IF NOT EXIST "%cache_dir%" MKDIR "%cache_dir%"

	REM If the cache still doesn't exist, fail with an error that we probably don't have permissions.
	IF NOT EXIST "%cache_dir%" (
	ECHO Error: Unable to create cache directory at
	ECHO %cache_dir%
	ECHO.
	ECHO This may be because flutter doesn't have write permissions for
	ECHO this path. Try moving the flutter directory to a writable location,
	ECHO such as within your home directory.
	EXIT /B 1
	)


	REM To debug the tool, you can uncomment the following lines to enable checked mode and set an observatory port:
	REM SET FLUTTER_TOOL_ARGS="--enable-asserts %FLUTTER_TOOL_ARGS%"
	REM SET FLUTTER_TOOL_ARGS="%FLUTTER_TOOL_ARGS% --observe=65432"

	:acquire_lock
	2>NUL (
	REM "3" is now stderr because of "2>NUL".
	CALL :subroutine %* 2>&3 9> "%cache_dir%\flutter.bat.lock" \|\| GOTO acquire_lock
	)
	GOTO :after_subroutine

	:subroutine
	PUSHD "%flutter_root%"
	FOR /f %%r IN ('git rev-parse HEAD') DO SET revision=%%r
	POPD

	REM The following IF conditions are all linked with a logical OR. However,
	REM there is no OR operator in batch and a GOTO construct is used as replacement.

	IF NOT EXIST "%engine_stamp%" GOTO do_sdk_update_and_snapshot
	SET /P dart_required_version=<"%engine_version_path%"
	SET /P dart_installed_version=<"%engine_stamp%"
	IF !dart_required_version! NEQ !dart_installed_version! GOTO do_sdk_update_and_snapshot
	IF NOT EXIST "%snapshot_path%" GOTO do_snapshot
	IF NOT EXIST "%stamp_path%" GOTO do_snapshot
	SET /P stamp_value=<"%stamp_path%"
	IF !stamp_value! NEQ !revision! GOTO do_snapshot
	SET pubspec_yaml_path=%flutter_tools_dir%\pubspec.yaml
	SET pubspec_lock_path=%flutter_tools_dir%\pubspec.lock
	FOR /F %%i IN ('DIR /B /O:D "%pubspec_yaml_path%" "%pubspec_lock_path%"') DO SET newer_file=%%i
	FOR %%i IN (%pubspec_yaml_path%) DO SET pubspec_yaml_timestamp=%%~ti
	FOR %%i IN (%pubspec_lock_path%) DO SET pubspec_lock_timestamp=%%~ti
	IF "%pubspec_yaml_timestamp%" == "%pubspec_lock_timestamp%" SET newer_file=""
	IF "%newer_file%" EQU "pubspec.yaml" GOTO do_snapshot

	REM Everything is up-to-date - exit subroutine
	EXIT /B

	:do_sdk_update_and_snapshot
	ECHO Checking Dart SDK version...
	SET update_dart_bin=%FLUTTER_ROOT%/bin/internal/update_dart_sdk.ps1
	REM Escape apostrophes from the executable path
	SET "update_dart_bin=!update_dart_bin:'=''!"
	PowerShell.exe -ExecutionPolicy Bypass -Command "Unblock-File -Path '%update_dart_bin%'; & '%update_dart_bin%'"
	IF "%ERRORLEVEL%" NEQ "0" (
	ECHO Error: Unable to update Dart SDK. Retrying...
	timeout /t 5 /nobreak
	GOTO :do_sdk_update_and_snapshot
	)

	:do_snapshot
	IF EXIST "%FLUTTER_ROOT%\version" DEL "%FLUTTER_ROOT%\version"
	ECHO: > "%cache_dir%\.dartignore"
	ECHO Building flutter tool...
	PUSHD "%flutter_tools_dir%"

	REM Makes changes to PUB_ENVIRONMENT only visible to commands within SETLOCAL/ENDLOCAL
	SETLOCAL
	SET VERBOSITY=--verbosity=error
	IF "%CI%" == "true" GOTO on_bot
	IF "%BOT%" == "true" GOTO on_bot
	IF "%CONTINUOUS_INTEGRATION%" == "true" GOTO on_bot
	IF "%CHROME_HEADLESS%" == "1" GOTO on_bot
	GOTO not_on_bot
	:on_bot
	SET PUB_ENVIRONMENT=%PUB_ENVIRONMENT%:flutter_bot
	SET VERBOSITY=--verbosity=normal
	:not_on_bot
	SET PUB_ENVIRONMENT=%PUB_ENVIRONMENT%:flutter_install
	IF "%PUB_CACHE%" == "" (
	IF EXIST "%pub_cache_path%" SET PUB_CACHE=%pub_cache_path%
	)

	SET /A total_tries=10
	SET /A remaining_tries=%total_tries%-1
	:retry_pub_upgrade
	ECHO Running pub upgrade...
	CALL "%pub%" upgrade "%VERBOSITY%" --no-precompile
	IF "%ERRORLEVEL%" EQU "0" goto :upgrade_succeeded
	ECHO Error (%ERRORLEVEL%): Unable to 'pub upgrade' flutter tool. Retrying in five seconds... (%remaining_tries% tries left)
	timeout /t 5 /nobreak 2>NUL
	SET /A remaining_tries-=1
	IF "%remaining_tries%" EQU "0" GOTO upgrade_retries_exhausted
	GOTO :retry_pub_upgrade
	:upgrade_retries_exhausted
	SET exit_code=%ERRORLEVEL%
	ECHO Error: 'pub upgrade' still failing after %total_tries% tries, giving up.
	GOTO final_exit
	:upgrade_succeeded
	ENDLOCAL

	POPD

	IF "%FLUTTER_TOOL_ARGS%" == "" (
	"%dart%" --snapshot="%snapshot_path%" --packages="%flutter_tools_dir%\.packages" --no-enable-mirrors "%script_path%"
	) else (
	"%dart%" "%FLUTTER_TOOL_ARGS%" --snapshot="%snapshot_path%" --packages="%flutter_tools_dir%\.packages" "%script_path%"
	)
	IF "%ERRORLEVEL%" NEQ "0" (
	ECHO Error: Unable to create dart snapshot for flutter tool.
	SET exit_code=%ERRORLEVEL%
	GOTO :final_exit
	)
	>"%stamp_path%" ECHO %revision%

	REM Exit Subroutine
	EXIT /B

	:after_subroutine

	REM Chaining the call to 'dart' and 'exit' with an ampersand ensures that
	REM Windows reads both commands into memory once before executing them. This
	REM avoids nasty errors that may otherwise occur when the dart command (e.g. as
	REM part of 'flutter upgrade') modifies this batch script while it is executing.
	REM
	REM Do not use the CALL command in the next line to execute Dart. CALL causes
	REM Windows to re-read the line from disk after the CALL command has finished
	REM regardless of the ampersand chain.
	"%dart%" --packages="%flutter_tools_dir%\.packages" %FLUTTER_TOOL_ARGS% "%snapshot_path%" %* & exit /B !ERRORLEVEL!

	:final_exit
	EXIT /B %exit_code%