Batch script for downloading MinGW

The script allows for a specific version of MniGW to be downloaded.
This is useful for testing compilation of the project using MinGW on
Windows build servers

mingw.cmd

@@ -0,0 +1,879 @@
+:: Make sure the extensions are enabled
+@verify other 2>nul
+@setlocal EnableExtensions EnableDelayedExpansion
+@if errorlevel 1 (
+  @call :print_usage "Failed to enable extensions"
+  @exit /b 1
+)
+
+::Change the code page to unicode
+@chcp 65001 1>nul 2>nul
+@if errorlevel 1 (
+  @call :print_usage "Failed to change the code page to unicode"
+  @exit /b 1
+)
+
+:: Set up some global variables
+@set "script_name=%~nx0"
+@set "script_folder=%~dp0"
+@set "script_folder=%script_folder:~0,-1%"
+@set "dependency_path=%TEMP%\mingw-build-dependencies"
+
+:: Check the command line parameters
+@set logging_level=1
+:options_loop
+@if [%1] == [] goto :options_parsed
+@set "arg=%~1"
+@set one=%arg:~0,1%
+@set two=%arg:~0,2%
+@set three=%arg:~0,3%
+@if /i [%arg%] == [/?] (
+  @call :print_usage "Downloads a specific version of MinGW"
+  @exit /b 0
+)
+@if /i [%arg%] == [/q] set quiet=true
+@if /i [%two%] == [/v] @if /i not [%three%] == [/ve] @call :verbosity "!arg!"
+@if /i [%arg%] == [/version] set "version=%~2" & shift
+@if /i [%arg%] == [/arch] set "arch=%~2" & shift
+@if /i [%arg%] == [/exceptions] set "exceptions=%~2" & shift
+@if /i [%arg%] == [/threading] set "threading=%~2" & shift
+@if /i [%arg%] == [/revision] set "revision=%~2" & shift
+@if /i not [!one!] == [/] (
+  if not defined output_path (
+    set output_path=!arg!
+  ) else (
+    @call :print_usage "Too many output locations: !output_path! !arg!" ^
+                       "There should only be one output location"
+    @exit /b 1
+  )
+)
+@shift
+@goto :options_loop
+:options_parsed
+@if defined quiet set logging_level=0
+@if not defined output_path set "output_path=%script_folder%\mingw-builds"
+@set "output_path=%output_path:/=\%"
+
+:: Set up the logging
+@set "log_folder=%output_path%\logs"
+@call :iso8601 timestamp
+@set "log_path=%log_folder%\%timestamp%.log"
+@set log_keep=10
+
+:: Get default architecture
+@if not defined arch @call :architecture arch
+
+:: Only keep a certain amount of logs
+@set /a "log_keep=log_keep-1"
+@if not exist %log_folder% @mkdir %log_folder%
+@for /f "skip=%log_keep%" %%f in ('dir /b /o-D /tc %log_folder%') do @(
+  @call :log 4 "Removing old log file %log_folder%\%%f"
+  del %log_folder%\%%f
+)
+
+:: Set up some more global variables
+@call :windows_version win_ver win_ver_major win_ver_minor win_ver_rev
+@call :script_source script_source
+@if [%script_source%] == [explorer] (
+  set /a "logging_level=logging_level+1"
+)
+
+:: Execute the main function
+@call :main "%arch%" "%version%" "%threading%" "%exceptions%" "%revision%"
+@if errorlevel 1 (
+  @call :log 0 "Failed to download MinGW"
+  @call :log 0 "View the log at %log_path%"
+  @exit /b 1
+)
+
+:: Stop the script if the user double clicked
+@if [%script_source%] == [explorer] (
+  pause
+)
+
+@endlocal
+@goto :eof
+
+:: -------------------------- Functions start here ----------------------------
+
+:main - Main function that performs the download
+:: %1 - Target architecture
+:: %2 - Version of MinGW to get [optional]
+:: %3 - Threading model [optional]
+:: %4 - Exception model [optional]
+:: %5 - Package revision [optional]
+@setlocal
+@call :log 6
+@call :log 2 "Welcome to the MinGW download script"
+@call :log 6 "------------------------------------"
+@call :log 6
+@call :log 2 "This script downloads a specific version of MinGW"
+@set "arch=%~1"
+@if "%arch%" == "" @exit /b 1
+@set "version=%~2"
+@set "threading=%~3"
+@set "exceptions=%~4"
+@set "revision=%~5"
+@call :log 3 "arch       = %arch%"
+@call :log 3 "version    = %version%"
+@call :log 3 "exceptions = %exceptions%"
+@call :log 3 "threading  = %threading%"
+@call :log 3 "revision   = %revision%"
+@call :repository repo
+@if errorlevel 1 (
+  @call :log 0 "Failed to get the MinGW-builds repository information"
+  @exit /b 1
+)
+@call :resolve slug url "%repo%" "%arch%" "%version%" "%threading%" "%exceptions%" "%revision%"
+@if errorlevel 1 (
+  @call :log 0 "Failed to resolve the correct URL of MinGW"
+  @exit /b 1
+)
+@call :unpack compiler_path "%url%" "%output_path%\mingw\%slug%"
+@if errorlevel 1 (
+  @call :log 0 "Failed to unpack the MinGW archive"
+  @exit /b 1
+)
+@rmdir /s /q "%dependency_path%"
+@echo.%compiler_path%
+@endlocal
+@goto :eof
+
+:repository - Gets the MinGW-builds repository
+:: %1 - The return variable for the repository file path
+@verify other 2>nul
+@setlocal EnableDelayedExpansion
+@if errorlevel 1 (
+  @call :log 0 "Failed to enable extensions"
+  @exit /b 1
+)
+@set "var=%~1"
+@if "%var%" == "" @exit /b 1
+@call :log 7
+@call :log 2 "Getting MinGW repository information"
+@set "url=http://downloads.sourceforge.net/project/mingw-w64/Toolchains targetting Win32/Personal Builds/mingw-builds/installer/repository.txt"
+@call :log 6
+@call :log 1 "Downloading MinGW repository"
+@set "file_path=%dependency_path%\mingw-repository.txt"
+@call :download "%url%" "%file_path%"
+@if errorlevel 1 (
+  @call :log 0 "Failed to download the MinGW repository information"
+  @exit /b 1
+)
+@set "repository_path=%dependency_path%\repository.txt"
+@del "%repository_path%" 2>nul
+@for /f "delims=| tokens=1-6,*" %%a in (%file_path%) do @(
+  @set "version=%%~a"
+  @set "version=!version: =!"
+  @set "arch=%%~b"
+  @set "arch=!arch: =!"
+  @set "threading=%%~c"
+  @set "threading=!threading: =!"
+  @set "exceptions=%%~d"
+  @set "exceptions=!exceptions: =!"
+  @set "revision=%%~e"
+  @set "revision=!revision: =!"
+  @set "revision=!revision:rev=!"
+  @set "url=%%~f"
+  @set "url=!url:%%20= !"
+  @for /l %%a in (1,1,32) do @if "!url:~-1!" == " " set url=!url:~0,-1!
+  @echo !arch!^|!version!^|!threading!^|!exceptions!^|!revision!^|!url!>> "%repository_path%"
+)
+@del "%file_path%" 2>nul
+@endlocal & set "%var%=%repository_path%"
+@goto :eof
+
+:resolve - Gets the MinGW-builds repository
+:: %1 - The return variable for the MinGW slug
+:: %2 - The return variable for the MinGW URL
+:: %3 - The repository information to use
+:: %4 - Target architecture
+:: %5 - Version of MinGW to get [optional]
+:: %6 - Threading model [optional]
+:: %7 - Exception model [optional]
+:: %8 - Package revision [optional]
+@setlocal
+@set "slug_var=%~1"
+@if "%slug_var%" == "" @exit /b 1
+@set "url_var=%~2"
+@if "%url_var%" == "" @exit /b 1
+@set "repository=%~3"
+@if "%repository%" == "" @exit /b 1
+@set "arch=%~4"
+@if "%arch%" == "" @exit /b 1
+@call :resolve_version version "%repository%" "%arch%" "%~5"
+@if errorlevel 1 @exit /b 1
+@call :resolve_threading threading "%repository%" "%arch%" "%version%" "%~6"
+@if errorlevel 1 @exit /b 1
+@call :resolve_exceptions exceptions "%repository%" "%arch%" "%version%" "%threading%" "%~7"
+@if errorlevel 1 @exit /b 1
+@call :resolve_revision revision "%repository%" "%arch%" "%version%" "%threading%" "%exceptions%" "%~8"
+@if errorlevel 1 @exit /b 1
+@call :log 3 "Finding URL"
+@for /f "delims=| tokens=1-6" %%a in (%repository%) do @(
+  @if "%arch%" == "%%a" (
+    @if "%version%" == "%%b" (
+      @if "%threading%" == "%%c" (
+        @if "%exceptions%" == "%%d" (
+          @if "%revision%" == "%%e" (
+            @set "url=%%f"
+) ) ) ) ) )
+@if "%url%" == "" (
+  @call :log 0 "Failed to resolve URL"
+  @exit /b 1
+)
+@set slug=gcc-%version%-%arch%-%threading%-%exceptions%-rev%revision%
+@call :log 2 "Resolved slug: %slug%"
+@call :log 2 "Resolved url: %url%"
+@endlocal & set "%slug_var%=%slug%" & set "%url_var%=%url%"
+@goto :eof
+
+:unpack - Unpacks the MinGW archive
+:: %1 - The return variable name for the compiler path
+:: %2 - The filepath or URL of the archive
+:: %3 - The folder to unpack to
+@verify other 2>nul
+@setlocal EnableDelayedExpansion
+@if errorlevel 1 (
+  @call :log 0 "Failed to enable extensions"
+  @exit /b 1
+)
+@set "var=%~1"
+@if "%var%" == "" @exit /b 1
+@set "archive_path=%~2"
+@if "%archive_path%" == "" @exit /b 1
+@set "folder_path=%~3"
+@if "%folder_path%" == "" @exit /b 1
+@set "compiler_path=%folder_path%\bin"
+@if exist "%compiler_path%" goto :unpack_done
+@call :log 7
+@call :log 2 "Unpacking MinGW archive"
+@set "http=%archive_path:~0,4%"
+@if "%http%" == "http" (
+  @set "url=%archive_path%"
+  @for /f %%a in ("!url: =-!") do @set "file_name=%%~na"
+  @for /f %%a in ("!url: =-!") do @set "file_ext=%%~xa"
+  @set "archive_path=%dependency_path%\!file_name!!file_ext!"
+  @if not exist "!archive_path!" (
+    @call :log 6
+    @call :log 1 "Downloading MinGW archive"
+    @call :download "!url!" "!archive_path!"
+    @if errorlevel 1 (
+      @del "!archive_path!" 2>nul
+      @call :log 0 "Failed to download: !file_name!!file_ext!"
+      @exit /b 1
+    )
+  )
+)
+@if not exist "%archive_path%" (
+  @call :log 0 "The archive did not exist to unpack: %archive_path%"
+  @exit /b 1
+)
+@for /f %%a in ("%archive_path: =-%") do @set "file_name=%%~na"
+@for /f %%a in ("%archive_path: =-%") do @set "file_ext=%%~xa"
+@call :log 6
+@call :log 1 "Unpacking MinGW %file_name%%file_ext%"
+@call :find_sevenzip sevenzip_executable
+@if errorlevel 1 (
+  @call :log 0 "Need 7zip to unpack the MinGW archive"
+  @exit /b 1
+)
+@call :iso8601 iso8601
+@for /f %%a in ("%folder_path%") do @set "tmp_path=%%~dpatmp-%iso8601%"
+@"%sevenzip_executable%" x -y "-o%tmp_path%" "%archive_path%" > nul
+@if errorlevel 1 (
+  @rmdir /s /q "%folder_path%"
+  @call :log 0 "Failed to unpack the MinGW archive"
+  @exit /b 1
+)
+@set "expected_path=%tmp_path%\mingw64"
+@if not exist "%expected_path%" (
+  @set "expected_path=%tmp_path%\mingw32"
+)
+@move /y "%expected_path%" "%folder_path%" > nul
+@if errorlevel 1 (
+  @rmdir /s /q "%tmp_path%" 2>nul
+  @call :log 0 "Failed to move MinGW folder"
+  @call :log 0 "%expected_path%"
+  @call :log 0 "%folder_path%"
+  @exit /b 1
+)
+@rmdir /s /q %tmp_path%
+@set "compiler_path=%folder_path%\bin"
+:unpack_done
+@if not exist "%compiler_path%\gcc.exe" (
+  @call :log 0 "Failed to find gcc: %compiler_path%"
+  @exit /b 1
+)
+@endlocal & set "%var%=%compiler_path%"
+@goto :eof
+
+:find_sevenzip - Finds (or downloads) the 7zip executable
+:: %1 - The return variable for the 7zip executable path
+@setlocal
+@set "var=%~1"
+@if "%var%" == "" @exit /b 1
+@call :log 2 "Finding 7zip"
+@call :find_in_path sevenzip_executable 7z.exe
+@if not errorlevel 1 goto :find_sevenzip_done
+@call :find_in_path sevenzip_executable 7za.exe
+@if not errorlevel 1 goto :find_sevenzip_done
+@set checksum=2FAC454A90AE96021F4FFC607D4C00F8
+@set "url=http://7-zip.org/a/7za920.zip"
+@for /f %%a in ("%url: =-%") do @set "file_name=%%~na"
+@for /f %%a in ("%url: =-%") do @set "file_ext=%%~xa"
+@set "archive_path=%dependency_path%\%file_name%%file_ext%"
+@if not exist "%archive_path%" (
+  @call :log 6
+  @call :log 1 "Downloading 7zip archive"
+  @call :download "%url%" "%archive_path%" %checksum%
+  @if errorlevel 1 (
+    @del "%archive_path%" 2>nul
+    @call :log 0 "Failed to download: %file_name%%file_ext%"
+    @exit /b 1
+  )
+)
+@set "sevenzip_path=%dependency_path%\sevenzip"
+@if not exist "%sevenzip_path%" (
+  @call :unzip "%archive_path%" "%sevenzip_path%"
+  @if errorlevel 1 (
+    @call :log 0 "Failed to unzip the7zip archive"
+    @exit /b 1
+  )
+)
+@set "sevenzip_executable=%sevenzip_path%\7za.exe"
+@if not exist "%sevenzip_executable%" (
+  @call :log 0 "Failed to find unpacked 7zip: %sevenzip_executable%"
+  @exit /b 1
+)
+:find_sevenzip_done
+@call :log 2 "Found 7zip: %sevenzip_executable%"
+@endlocal & set "%var%=%sevenzip_executable%"
+@goto :eof
+
+:unzip - Unzips a .zip archive
+:: %1 - The archive to unzip
+:: %2 - The location to unzip to
+@setlocal
+@set "archive_path=%~1"
+@if "%archive_path%" == "" @exit /b 1
+@set "folder_path=%~2"
+@if "%folder_path%" == "" @exit /b 1
+@for /f %%a in ("%archive_path: =-%") do @set "file_name=%%~na"
+@for /f %%a in ("%archive_path: =-%") do @set "file_ext=%%~xa"
+@call :log 2 "Unzipping: %file_name%%file_ext%"
+@powershell ^
+  Add-Type -assembly "system.io.compression.filesystem"; ^
+  [io.compression.zipfile]::ExtractToDirectory(^
+    '%archive_path%', '%folder_path%') 2>nul
+@if errorlevel 1 (
+  @call :log 0 "Failed to unzip: %file_name%%file_ext%"
+  @exit /b 1
+)
+@endlocal
+@goto :eof
+
+:resolve_version - Gets the version of the MinGW compiler
+:: %1 - The return variable for the version
+:: %2 - The repository information to use
+:: %3 - The architecture of the compiler
+:: %4 - Version of MinGW to get [optional]
+@verify other 2>nul
+@setlocal EnableDelayedExpansion
+@if errorlevel 1 (
+  @call :log 0 "Failed to enable extensions"
+  @exit /b 1
+)
+@set "var=%~1"
+@if "%var%" == "" @exit /b 1
+@set "repository=%~2"
+@if "%repository%" == "" @exit /b 1
+@set "arch=%~3"
+@if "%arch%" == "" @exit /b 1
+@set "version=%~4"
+@if not "%version%" == "" goto :resolve_version_done
+:: Find the latest version
+@call :log 3 "Finding latest version"
+@set version=0.0.0
+@for /f "delims=| tokens=1-6" %%a in (%repository%) do @(
+  @if "%arch%" == "%%a" (
+    @call :version_compare result "%version%" "%%b"
+    @if errorlevel 1 (
+      @call :log 0 "Failed to compare versions: %version% %%a"
+      @exit /b 1
+    )
+    @if !result! lss 0 set version=%%b
+  )
+)
+:resolve_version_done
+@if "%version%" == "" (
+  @call :log 0 "Failed to resolve latest version number"
+  @exit /b 1
+)
+@call :log 2 "Resolved version: %version%"
+@endlocal & set "%var%=%version%"
+@goto :eof
+
+:resolve_threading - Gets the threading model of the MinGW compiler
+:: %1 - The return variable for the threading model
+:: %2 - The repository information to use
+:: %3 - The architecture of the compiler
+:: %4 - The version of the compiler
+:: %5 - threading model of MinGW to use [optional]
+@verify other 2>nul
+@setlocal EnableDelayedExpansion
+@if errorlevel 1 (
+  @call :log 0 "Failed to enable extensions"
+  @exit /b 1
+)
+@set "var=%~1"
+@if "%var%" == "" @exit /b 1
+@set "repository=%~2"
+@if "%repository%" == "" @exit /b 1
+@set "arch=%~3"
+@if "%arch%" == "" @exit /b 1
+@set "version=%~4"
+@if "%version%" == "" @exit /b 1
+@set "threading=%~5"
+@if not "%threading%" == "" goto :resolve_threading_done
+@call :log 3 "Finding best threading model"
+@for /f "delims=| tokens=1-6" %%a in (%repository%) do @(
+  @if "%arch%" == "%%a" (
+    @if "%version%" == "%%b" (
+      @if not defined threading (
+        @set "threading=%%c"
+      )
+      @if "%%c" == "posix" (
+        @set "threading=%%c"
+) ) ) )
+:resolve_threading_done
+@if "%threading%" == "" (
+  @call :log 0 "Failed to resolve the best threading model"
+  @exit /b 1
+)
+@call :log 2 "Resolved threading model: %threading%"
+@endlocal & set "%var%=%threading%"
+@goto :eof
+
+:resolve_exceptions - Gets the exception model of the MinGW compiler
+:: %1 - The return variable for the exception model
+:: %2 - The repository information to use
+:: %3 - The architecture of the compiler
+:: %4 - The version of the compiler
+:: %4 - The threading model of the compiler
+:: %5 - exception model of MinGW to use [optional]
+@verify other 2>nul
+@setlocal EnableDelayedExpansion
+@if errorlevel 1 (
+  @call :log 0 "Failed to enable extensions"
+  @exit /b 1
+)
+@set "var=%~1"
+@if "%var%" == "" @exit /b 1
+@set "repository=%~2"
+@if "%repository%" == "" @exit /b 1
+@set "arch=%~3"
+@if "%arch%" == "" @exit /b 1
+@set "version=%~4"
+@if "%version%" == "" @exit /b 1
+@set "threading=%~5"
+@if "%threading%" == "" @exit /b 1
+@set "exceptions=%~6"
+@if not "%exceptions%" == "" goto :resolve_exceptions_done
+@call :log 3 "Finding best exception model"
+@for /f "delims=| tokens=1-6" %%a in (%repository%) do @(
+  @if "%arch%" == "%%a" (
+    @if "%version%" == "%%b" (
+      @if "%threading%" == "%%c" (
+        @if not defined exceptions (
+          @set "exceptions=%%d"
+        )
+        @if "%%d" == "dwarf" (
+          @set "exceptions=%%d"
+        )
+        @if "%%d" == "seh" (
+          @set "exceptions=%%d"
+) ) ) ) )
+:resolve_exceptions_done
+@if "%exceptions%" == "" (
+  @call :log 0 "Failed to resolve the best exception model"
+  @exit /b 1
+)
+@call :log 2 "Resolved exception model: %exceptions%"
+@endlocal & set "%var%=%exceptions%"
+@goto :eof
+
+:resolve_revision - Gets the revision of the MinGW compiler
+:: %1 - The return variable for the revision
+:: %2 - The repository information to use
+:: %3 - The architecture of the compiler
+:: %4 - The version of the compiler
+:: %4 - The threading model of the compiler
+:: %4 - The exception model of the compiler
+:: %5 - revision of the MinGW package to use [optional]
+@verify other 2>nul
+@setlocal EnableDelayedExpansion
+@if errorlevel 1 (
+  @call :log 0 "Failed to enable extensions"
+  @exit /b 1
+)
+@set "var=%~1"
+@if "%var%" == "" @exit /b 1
+@set "repository=%~2"
+@if "%repository%" == "" @exit /b 1
+@set "arch=%~3"
+@if "%arch%" == "" @exit /b 1
+@set "version=%~4"
+@if "%version%" == "" @exit /b 1
+@set "threading=%~5"
+@if "%threading%" == "" @exit /b 1
+@set "exceptions=%~6"
+@if "%exceptions%" == "" @exit /b 1
+@set "revision=%~7"
+@if not "%revision%" == "" goto :resolve_revision_done
+@call :log 3 "Finding latest revision"
+@for /f "delims=| tokens=1-6" %%a in (%repository%) do @(
+  @if "%arch%" == "%%a" (
+    @if "%version%" == "%%b" (
+      @if "%threading%" == "%%c" (
+        @if "%exceptions%" == "%%d" (
+          @if "%%e" gtr "%revision%" (
+            @set "revision=%%e"
+) ) ) ) ) )
+:resolve_revision_done
+@if "%revision%" == "" (
+  @call :log 0 "Failed to resolve latest revision"
+  @exit /b 1
+)
+@call :log 2 "Resolved revision: %revision%"
+@endlocal & set "%var%=%revision%"
+@goto :eof
+
+:version_compare - Compares two semantic version numbers
+:: %1 - The return variable:
+::        - < 0 : if %2 < %3
+::        -   0 : if %2 == %3
+::        - > 0 : if %2 > %3
+:: %2 - The first version to compare
+:: %3 - The second version to compare
+@setlocal
+@set "var=%~1"
+@if "%var%" == "" @exit /b 1
+@set "lhs=%~2"
+@if "%lhs%" == "" @exit /b 1
+@set "rhs=%~3"
+@if "%lhs%" == "" @exit /b 1
+@set result=0
+@for /f "delims=. tokens=1-6" %%a in ("%lhs%.%rhs%") do @(
+  @if %%a lss %%d (
+    set result=-1
+    goto :version_compare_done
+  ) else (
+    @if %%a gtr %%d (
+      set result=1
+      goto :version_compare_done
+    ) else (
+      @if %%b lss %%e (
+        set result=-1
+        goto :version_compare_done
+      ) else (
+        @if %%b gtr %%e (
+          set result=1
+          goto :version_compare_done
+        ) else (
+          @if %%c lss %%f (
+            set result=-1
+            goto :version_compare_done
+          ) else (
+            @if %%c gtr %%f (
+              set result=1
+              goto :version_compare_done
+            )
+          )
+        )
+      )
+    )
+  )
+)
+:version_compare_done
+@endlocal & set "%var%=%result%"
+@goto :eof
+
+:print_usage - Prints the usage of the script
+:: %* - message to print, each argument on it's own line
+@setlocal
+@for %%a in (%*) do @echo.%%~a
+@echo.
+@echo.build [/?][/v[v...]^|/q][/version][/arch a][/threading t]
+@echo.      [/exceptions e][/revision r] location
+@echo.
+@echo.  /version v  The version of MinGW to download
+@echo.  /arch a     The target architecture [i686^|x86_64]
+@echo.  /threading t
+@echo.              Threading model to use [posix^|win32]
+@echo.  /exceptions e
+@echo.              Exception model to use [sjlj^|seh^|dwarf]
+@echo.  /revision e Revision of the release to use
+@echo.  /v          Sets the output to be more verbose
+@echo.  /v[v...]    Extra verbosity, /vv, /vvv, etc
+@echo.  /q          Quiets the output
+@echo.  /?          Shows this usage message
+@echo.
+@endlocal
+@goto :eof
+
+:script_source - Determines if the script was ran from the cli or explorer
+:: %1 - The return variable [cli|explorer]
+@verify other 2>nul
+@setlocal EnableDelayedExpansion
+@if errorlevel 1 (
+  @call :log 0 "Failed to enable extensions"
+  @exit /b 1
+)
+@call :log 3 "Attempting to detect the script source"
+@echo "The invocation command was: '%cmdcmdline%'" >> %log_path%
+@for /f "tokens=1-3,*" %%a in ("%cmdcmdline%") do @(
+  set cmd=%%~a
+  set arg1=%%~b
+  set arg2=%%~c
+  set rest=%%~d
+)
+@set quote="
+@if "!arg2:~0,1!" equ "!quote!" (
+  if "!arg2:~-1!" neq "!quote!" (
+    set "arg2=!arg2:~1!"
+  )
+)
+@call :log 4 "cmd  = %cmd%"
+@call :log 4 "arg1 = %arg1%"
+@call :log 4 "arg2 = %arg2%"
+@call :log 4 "rest = %rest%"
+@call :log 4 "src  = %~f0"
+@if /i "%arg2%" == "call" (
+  set script_source=cli
+) else (
+  @if /i "%arg1%" == "/c" (
+    set script_source=explorer
+  ) else (
+    set script_source=cli
+  )
+)
+@call :log 3 "The script was invoked from %script_source%"
+@endlocal & set "%~1=%script_source%"
+@goto :eof
+
+:architecture - Finds the system architecture
+:: %1 - The return variable [i686|x86_64]
+@setlocal
+@call :log 3 "Determining the processor architecture"
+@set "key=HKLM\System\CurrentControlSet\Control\Session Manager\Environment"
+@set "var=PROCESSOR_ARCHITECTURE"
+@for /f "skip=2 tokens=2,*" %%a in ('reg query "%key%" /v "%var%"') do @set "arch=%%b"
+@if "%arch%" == "AMD64" set arch=x86_64
+@if "%arch%" == "x64" set arch=i686
+@call :log 4 "arch = %arch%"
+@endlocal & set "%~1=%arch%"
+@goto :eof
+
+:md5 - Gets the MD5 checksum for a file
+:: %1 - The hash
+:: %2 - The file path
+@setlocal
+@set "var=%~1"
+@set "file_path=%~2"
+@if "%var%" == "" @exit /b 1
+@if "%file_path%" == "" @exit /b 1
+@if not exist "%file_path%" @exit /b 1
+@for /f "skip=3 tokens=1,*" %%a in ('powershell Get-FileHash -Algorithm MD5 "'%file_path%'"') do @set hash=%%b
+@if not defined hash (
+  @call :log 6
+  @call :log 0 "Failed to get MD5 hash for %file_path%"
+  @exit /b 1
+)
+@endlocal & set "%var%=%hash: =%"
+@goto :eof
+
+:windows_version - Checks the windows version
+:: %1 - The windows version
+:: %2 - The major version number return variable
+:: %3 - The minor version number return variable
+:: %4 - The revision version number return variable
+@setlocal
+@call :log 3 "Retrieving the Windows version"
+@for /f "tokens=2 delims=[]" %%x in ('ver') do @set win_ver=%%x
+@set win_ver=%win_ver:Version =%
+@set win_ver_major=%win_ver:~0,1%
+@set win_ver_minor=%win_ver:~2,1%
+@set win_ver_rev=%win_ver:~4%
+@call :log 4 "win_ver = %win_ver%"
+@endlocal & set "%~1=%win_ver%" ^
+          & set "%~2=%win_ver_major%" ^
+          & set "%~3=%win_ver_minor%" ^
+          & set "%~4=%win_ver_rev%"
+@goto :eof
+
+:find_in_path - Finds a program of file in the PATH
+:: %1 - return variable of the file path
+@setlocal
+@set "var=%~1"
+@if "%var%" == "" @exit /b 1
+@set "file=%~2"
+@if "%file%" == "" @exit /b 1
+@call :log 3 "Searching PATH for %file%"
+@for %%x in ("%file%") do @set "file_path=%%~f$PATH:x"
+@if not defined file_path @exit /b 1
+@endlocal & set "%var%=%file_path%"
+@goto :eof
+
+:log_append - Appends another file into the current logging file
+:: %1 - the file_path to the file to concatenate
+@setlocal
+@set "file_path=%~1"
+@if "%file_path%" == "" @exit /b 1
+@call :log 3 "Appending to log: %file_path%"
+@call :iso8601 iso8601
+@set temp_log=%temp%\append-%iso8601%.log
+@call :log 4 "Using temp file %temp_log%"
+@type "%log_path%" "%file_path%" > "%temp_log%" 2>nul
+@move /y "%temp_log%" "%log_path%" 1>nul
+@del "%file_path% 2>nul
+@del "%temp_log% 2>nul
+@endlocal
+@goto :eof
+
+:iso8601 - Returns the current time in ISO8601 format
+:: %1 - the return variable
+:: %2 - format [extended|basic*]
+:: iso8601 - contains the resulting timestamp
+@setlocal
+@wmic Alias /? >NUL 2>&1 || @exit /b 1
+@set "var=%~1"
+@if "%var%" == "" @exit /b 1
+@set "format=%~2"
+@if "%format%" == "" set format=basic
+@for /F "skip=1 tokens=1-6" %%g IN ('wmic Path Win32_UTCTime Get Day^,Hour^,Minute^,Month^,Second^,Year /Format:table') do @(
+  @if "%%~l"=="" goto :iso8601_done
+  @set "yyyy=%%l"
+  @set "mm=00%%j"
+  @set "dd=00%%g"
+  @set "hour=00%%h"
+  @set "minute=00%%i"
+  @set "seconds=00%%k"
+)
+:iso8601_done
+@set mm=%mm:~-2%
+@set dd=%dd:~-2%
+@set hour=%hour:~-2%
+@set minute=%minute:~-2%
+@set seconds=%seconds:~-2%
+@if /i [%format%] == [extended] (
+  set iso8601=%yyyy%-%mm%-%dd%T%hour%:%minute%:%seconds%Z
+) else (
+  if /i [%format%] == [basic] (
+    set iso8601=%yyyy%%mm%%dd%T%hour%%minute%%seconds%Z
+  ) else (
+    @exit /b 1
+  )
+)
+@set iso8601=%iso8601: =0%
+@endlocal & set %var%=%iso8601%
+@goto :eof
+
+:verbosity - Processes the verbosity parameter '/v[v...]
+:: %1 - verbosity given on the command line
+:: logging_level - set to the number of v's
+@setlocal
+@set logging_level=0
+@set verbosity=%~1
+:verbosity_loop
+@set verbosity=%verbosity:~1%
+@if not [%verbosity%] == [] @(
+  set /a "logging_level=logging_level+1"
+  goto verbosity_loop
+)
+@endlocal & set logging_level=%logging_level%
+@goto :eof
+
+:log - Logs a message, depending on verbosity
+:: %1 - level
+::       [0-4] for CLI logging
+::       [5-9] for GUI logging
+:: %2 - message to print
+@setlocal
+@set "level=%~1"
+@set "msg=%~2"
+@if "%log_folder%" == "" (
+  echo Logging was used to early in the script, log_folder isn't set yet
+  goto :eof
+)
+@if "%log_path%" == "" (
+  echo Logging was used to early in the script, log_path isn't set yet
+  goto :eof
+)
+@if not exist "%log_folder%" mkdir "%log_folder%"
+@if not exist "%log_path%" echo. 1>nul 2>"%log_path%"
+@echo.%msg% >> "%log_path%"
+@if %level% geq 5 (
+  @if [%script_source%] == [explorer] (
+    set /a "level=level-5"
+  ) else (
+    @goto :eof
+  )
+)
+@if "%logging_level%" == "" (
+  echo Logging was used to early in the script, logging_level isn't set yet
+  goto :eof
+)
+@if %logging_level% geq %level% echo.%msg% 1>&2
+@endlocal
+@goto :eof
+
+:download - Downloads a file from the internet
+:: %1 - the url of the file to download
+:: %2 - the file to download to
+:: %3 - the MD5 checksum of the file (optional)
+@setlocal EnableDelayedExpansion
+@if errorlevel 1 (
+  @call :print_usage "Failed to enable extensions"
+  @exit /b 1
+)
+@set "url=%~1"
+@set "file_path=%~2"
+@set "checksum=%~3"
+@for %%a in (%file_path%) do @set dir_path=%%~dpa
+@for %%a in (%file_path%) do @set file_name=%%~nxa
+@if "%url%" == "" @exit /b 1
+@if "%file_path%" == "" @exit /b 1
+@if "%dir_path%" == "" @exit /b 1
+@if "%file_name%" == "" @exit /b 1
+@if not exist "%dir_path%" mkdir "%dir_path%"
+@call :log 2 "Downloading %url%"
+@call :iso8601 iso8601
+@set "temp_path=%temp%\download-%iso8601%-%file_name%"
+@call :log 4 "Using temp file %temp_path%"
+@powershell Invoke-WebRequest "'%url%'" ^
+  -OutFile "'%temp_path%'" ^
+  -UserAgent [Microsoft.PowerShell.Commands.PSUserAgent]::IE ^
+  1> nul 2> nul
+@if errorlevel 1 (
+  @call :log 0 "Failed to download %url%"
+  @exit /b 1
+)
+@if [%checksum%] neq [] (
+  @call :log 4 "Checking %checksum% against %temp_path%"
+  @call :md5 hash "%temp_path%"
+  if "!hash!" neq "%checksum%" (
+    @call :log 0 "Failed to match checksum: %temp_path%"
+    @call :log 0 "Hash    : !hash!"
+    @call :log 0 "Checksum: %checksum%"
+    @exit /b 1
+  ) else (
+    @call :log 3 "Checksum matched: %temp_path%"
+    @call :log 3 "Hash    : !hash!"
+    @call :log 3 "Checksum: %checksum%"
+  )
+)
+@call :log 4 "Renaming %temp_path% to %file_path%"
+@move /y "%temp_path%" "%file_path%" 1>nul
+@endlocal
+@goto :eof