I checked in a project on one computer, checked out on another, and find that the binaries installed by NuGet are missing. I could check them in to source control as well, but it looks like there's a better solution:
http://docs.nuget.org/docs/workflows/using-nuget-without-committing-packages
I followed those instructions, now have a .nuget
folder where one should be, have the following entries in my .csproj file:
<RestorePackages>true</RestorePackages>
<Import Project="$(SolutionDir)\.nuget\nuget.targets" />
and yet when I rebuild my solution, the missing packages are not restored.
What am I missing? How can I diagnose this problem?
This question is related to
nuget
For me, I had an empty tag NuGetPackageImportStamp in .csproj
<NuGetPackageImportStamp>
</NuGetPackageImportStamp>
It should ideally contain some valid GUID.
Removing this tag and then "Restore Nugets" worked for me.
I had NuGet packages breaking after I did a System Restore on my system, backing it up about two days. (The NuGet packages had been installed in the meantime.) To fix it, I had to go to the .nuget\packages folder in my user profile, find the packages, and delete them. Only then would Visual Studio pull the packages down fresh and properly add them as references.
In VS2017, right-click on the solution => Open CommandLine => Developer Command Line.
Once thats open, type in (and press enter after)
dotnet restore
That will restore any/all packages, and you get a nice console output of whats been done...
Just for others that might run into this problem, I was able to resolve the issue by closing Visual Studio and reopening the project. When the project was loaded the packages were restored during the initialization phase.
I have run into this problem in two scenarios.
First, when I attempt to build my solution from the command line using msbuild.exe. Secondly, when I attempt to build the sln and the containing projects on my build server using TFS and CI.
I get errors claiming that references are missing. When inspecting both my local build directory and the TFS server's I see that the /packages folder is not created, and the nuget packages are not copied over. Following the instructions listed in Alexandre's answer http://nuget.codeplex.com/workitem/1879 also did not work for me.
I've enabled Restore Packages via VS2010 and I have seen builds only work from within VS2010. Again, using msbuild fails.My workaround is probably totally invalid, but for my environment this got everything working from a command line build locally, as well as from a CI build in TFS.
I went into .\nuget and changed this line in the .nuget\NuGet.targets file:
from:
<RestoreCommand>$(NuGetCommand) install "$(PackagesConfig)" -source "$(PackageSources)" -o "$(PackagesDir)"</RestoreCommand>
to: (notice, without the quotes around the variables)
<RestoreCommand>$(NuGetCommand) install $(PackagesConfig) -source $(PackageSources) -o $(PackagesDir)</RestoreCommand>
I understand that if my directories have spaces in them, this will fail, but I don't have spaces in my directories and so this workaround got my builds to complete successfully...for the time being.
I will say that turning on diagnostic level logging in your build will help show what commands are being executed by msbuild. This is what led me to hacking the targets file temporarily.
VS 2017
Tools>NuGet Package Manager>Package Manager Settings>General Click on "Clear All NuGet Cache(s)"
In my case, an aborted Nuget restore-attempt had corrupted one of the packages.config
files in the solution. I did not discover this before checking my git working tree. After reverting the changes in the file, Nuget restore was working again.
Automatic Package Restore will fail for any of the following reasons:
The following article outlines in more detail how to go about points 1-3: https://docs.nuget.org/consume/package-restore/migrating-to-automatic-package-restore
You have to choose one way of the following :
Re-installing a package by it's name in all solution's projects:
Update-Package –reinstall <packageName>
Re-installing a package by it's name and ignoring it's dependencies in all solution's projects:
Update-Package –reinstall <packageName> -ignoreDependencies
Re-installing a package by it's name in a project:
Update-Package –reinstall <packageName> <projectName>
Re-installing all packages in a specific project:
Update-Package -reinstall -ProjectName <projectName>
Re-installing all packages in a solution:
Update-Package -reinstall
Sometimes something strange happens and using Visual Studio to automatically restore doesn't work. In that case you can use the NuGet Package Manager Console. That is opened within Visual Studio from Tools -> NuGet Package Manager -> Package Manager Console. The commands within the console are simple. And to get context help while typing a command just press the button and it will give you all options that start with the letters you're typing. So if a package isn't installed, for example log4net, type the following command:
Install-Package log4net
You can do a whole lot more, like specify the version to install, update a package, uninstall a package, etc.
I had to use the console to help me when Visual Studio was acting like a weirdo.
There is a shortcut to make Nuget restore work.
Make sure internet connection or Nuget urls are proper in VS Tools options menu
Look at .nuget or nuget folder in the solution, else - copy from any to get nuget.exe
DELETE packages folders, if exists
Open the Package manager console execute this command
If the error you are facing is "unable to connect to remote server" as was mine, then it would benefit you to have this check as well in addition to the checks provided in the above comments.
I saw that there were 2 NUGET Package Sources from which the packages could be downloaded (within Tools->Nuget Package Manager->Packager Manager Settings). One of the Package Source's was not functioning and Nuget was trying to download from that source only.
Things fell into place once I changed the package source to download from: https://www.nuget.org/api/v2/ EXPLICTLY in the settings
vs2015 no enable nuget restore problem. My solution:
add folder .nuget, add file NuGet.Config and NuGet.targets in Directory .nuget
each project file add: build
<RestorePackages>true</RestorePackages>
<Import Project="$(SolutionDir)\.nuget\NuGet.targets" Condition="Exists('$(SolutionDir)\.nuget\NuGet.targets')" />
<Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
<PropertyGroup>
<ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them. For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
</PropertyGroup>
<Error Condition="!Exists('$(SolutionDir)\.nuget\NuGet.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\.nuget\NuGet.targets'))" />
</Target>
For others who stumble onto this post, read this.
NuGet 2.7+ introduced us to Automatic Package Restore. This is considered to be a much better approach for most applications as it does not tamper with the MSBuild process. Less headaches.
Some links to get you started:
The best workaround that I found creating a new Project from scratch, then import all the source files with the code. My project was not so complicated so I had no problem from there.
None of the other solutions worked in my situation:
AspNetCore dependencies had been installed/uninstalled and were being cached. 'AspNetCore.All' would refuse to properly update/reinstall/remove. And regardless of what i did, it would use the cached dependencies (that it was not compatible with), because they were a higher version.
PackageReference
bin
, obj
foldersTools > Nuget Package Manager > Package Manager
Settings
and Clear all Nuget caches
. Check the console because it may
fail to remove some items - copy the folder path and exit visual
studio. If that still doesn't work, repeat but also search your drive in windows explorer for nuget
and delete anything cachey looking.
If anything else didn't work, try:
Worked for me and it's easy to try.
Did you enable package restore mode in the project that has the missing packages/binaries ? There's a known issue that requires the packages to be correctly installed when enabling the restore mode :
http://nuget.codeplex.com/workitem/1879
Original link is dead; this might be a replacement: https://github.com/NuGet/Home/issues/1968
If none of the other answers work for you then try the following which was the only thing that worked for me:
Find your .csproj
file and edit it in a text editor.
Find the <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
tag in your .csproj
file and delete the whole block.
Re-install all packages in the solution:
Update-Package -reinstall
After this your nuget packages should be restored, i think this might be a fringe case that only occurs when you move your project to a different location.
Source: Stackoverflow.com