Allow upgrades without using setup*.exe. Addresses #22.

[ilatypov]

I adjusted the script to rely on the smaller interpreter (dash) and to upgrade all packages without using setup*.exe (should address #22 ). Using setup*.exe would bring up the GUI, preventing from remote invocation. Instead, the script copies the main directories to a secondary root, downloads, unpacks package updates into that secondary root. A subsequent invocation from the secondary root will be able to update the primary root. In the absence of chroot, we still need to invoke post-install scripts in-place in a final invocation in the primary root.

[alphapapa]

I saw your comment. I'm not sure I understand how this works. Do you mean it copies the entire Cygwin root recursively?

[ilatypov]

Yes, the added commands copy the existing top-level directories except the mount points in usr to a secondary root. A subsequent invocation will start ash in the secondary root and copy the secondary top level directories to the original root.

[ilatypov]

Unfortunately, adding consistency to apt-cyg did not rectify Cygwin's base address issue . Meaning that after some time "apt-cyg install PACKAGE_NAME" will either fail to find the package version frozen in the package list on disk or, if we update the package list with "apt-cyg update", may start updating the package's requisites such as "bash" and "cygwin", and this will result in the prominent Cygwin fork error.

Before I forget, the following CMD code runs Cygwin's setup-x86_64.exe to install a basic Cygwin image. This assumes that all Cygwin processes terminated before running the code.

set croot=e:\cygwin64
rd /s /q %croot%
powershell "Invoke-WebRequest -Uri 'http://cygwin.com/setup-x86_64.exe' -OutFile '%croot%\setup-x86_64.exe'"
%croot%\setup-x86_64.exe --no-desktop --no-shortcuts --no-startmenu --quiet-mode --no-admin --root %croot% --local-package-dir %croot%\install --upgrade-also --site http://mirrors.kernel.org/sourceware/cygwin/ --verbose --packages bash,curl,wget,subversion,git,openssh,unzip,zip

[andykimpe]

not everyone has powershell

set croot=e:\cygwin64
rd /s /q %croot%
rem Windows has no built-in wget or curl, so we generate a VBS script to do the same
set DLOAD_SCRIPT=%TEMP%\download-%RANDOM%-%RANDOM%-%RANDOM%-%RANDOM%.vbs
echo Option Explicit                                                    >  %DLOAD_SCRIPT%
echo Dim args, http, fileSystem, adoStream, url, target, status         >> %DLOAD_SCRIPT%
echo.                                                                   >> %DLOAD_SCRIPT%
echo Set args = Wscript.Arguments                                       >> %DLOAD_SCRIPT%
echo Set http = CreateObject("WinHttp.WinHttpRequest.5.1")              >> %DLOAD_SCRIPT%
echo url = args(0)                                                      >> %DLOAD_SCRIPT%
echo target = args(1)                                                   >> %DLOAD_SCRIPT%
echo WScript.Echo "Getting '" ^& target ^& "' from '" ^& url ^& "'..."  >> %DLOAD_SCRIPT%
echo.                                                                   >> %DLOAD_SCRIPT%
echo http.Open "GET", url, False                                        >> %DLOAD_SCRIPT%
echo http.Send                                                          >> %DLOAD_SCRIPT%
echo status = http.Status                                               >> %DLOAD_SCRIPT%
echo.                                                                   >> %DLOAD_SCRIPT%
echo If status ^<^> 200 Then                                            >> %DLOAD_SCRIPT%
echo    WScript.Echo "FAILED to download: HTTP Status " ^& status       >> %DLOAD_SCRIPT%
echo    WScript.Quit 1                                                  >> %DLOAD_SCRIPT%
echo End If                                                             >> %DLOAD_SCRIPT%
echo.                                                                   >> %DLOAD_SCRIPT%
echo Set adoStream = CreateObject("ADODB.Stream")                       >> %DLOAD_SCRIPT%
echo adoStream.Open                                                     >> %DLOAD_SCRIPT%
echo adoStream.Type = 1                                                 >> %DLOAD_SCRIPT%
echo adoStream.Write http.ResponseBody                                  >> %DLOAD_SCRIPT%
echo adoStream.Position = 0                                             >> %DLOAD_SCRIPT%
echo.                                                                   >> %DLOAD_SCRIPT%
echo Set fileSystem = CreateObject("Scripting.FileSystemObject")        >> %DLOAD_SCRIPT%
echo If fileSystem.FileExists(target) Then fileSystem.DeleteFile target >> %DLOAD_SCRIPT%
echo adoStream.SaveToFile target                                        >> %DLOAD_SCRIPT%
echo adoStream.Close                                                    >> %DLOAD_SCRIPT%
echo.                                                                   >> %DLOAD_SCRIPT%
rem download cygwin
cscript /nologo %DLOAD_SCRIPT% https://cygwin.com/setup-x86_64.exe %croot%\setup-x86_64.exe
rem Install base cygwin
%croot%\setup-x86_64.exe --no-desktop --no-shortcuts --no-startmenu --quiet-mode --no-admin --root %croot% --local-package-dir %croot%\install --upgrade-also --site http://mirrors.kernel.org/sourceware/cygwin/ --verbose --packages bash,curl,wget,subversion,git,openssh,unzip,zip

ps pull rejected for me change bash by ash not alowed