Paket failed with: The input sequence was empty.

[kshanafelt]

This is my paket.dependcies file:

source https://nuget.org/api/v2

github kshanafelt/commandline build.fsx

Here is what I get:
Note this is for a initial pull, without a paket-files folder, and without a paket.lock file

PS C:\src\Projects\r> .\.paket\paket.exe install --verbose
Paket version 2.2.1.0
found: C:\src\Projects\DeBlorber\paket.dependencies
Parsing C:\src\Projects\DeBlorber\paket.dependencies
Paket failed with:
        The input sequence was empty.
Parameter name: source
StackTrace:
     at Microsoft.FSharp.Collections.SeqModule.Last[T](IEnumerable`1 source)
   at <StartupCode$Paket-Core>[email protected](Tuple`2 tupledArg)
   at [email protected](b& )
   at Microsoft.FSharp.Collections.IEnumerator.MapEnumerator`1.System-Collections-IEnumerator-MoveNext()
   at Microsoft.FSharp.Collections.SeqModule.ToList[T](IEnumerable`1 source)
   at <StartupCode$Paket-Core>[email protected](GroupName k, RequirementsGroup group)
   at Microsoft.FSharp.Collections.MapTreeModule.mapiOpt[a,b,c](FSharpFunc`3 f, MapTree`2 m)
   at Microsoft.FSharp.Collections.FSharpMap`2.Map[b](FSharpFunc`2 f)
   at [email protected](DependenciesFile d, FSharpMap`2 g)
   at Paket.UpdateProcess.selectiveUpdate(FSharpFunc`2 resolve, LockFile lockFile, DependenciesFile dependenciesFile, Boolean updateAll, FSharpOption`1 package)
   at Paket.UpdateProcess.SelectiveUpdate(DependenciesFile dependenciesFile, Boolean updateAll, FSharpOption`1 exclude, Boolean force)
   at Paket.UpdateProcess.SmartInstall(DependenciesFile dependenciesFile, Boolean updateAll, FSharpOption`1 exclude, UpdaterOptions options)
   at <StartupCode$Paket-Core>[email protected](Unit unitVar0)
   at Paket.Utils.RunInLockedAccessMode[a](String rootFolder, FSharpFunc`2 action)
   at [email protected](ParseResults`1 results)
   at Paket.Program.processWithValidation[T](FSharpFunc`2 validateF, FSharpFunc`2 commandF, Command command, String[] args)
   at [email protected](Command command, String[] args)
   at Paket.Program.main()
PS C:\src\Projects\>

Oddly I get the same error if I try the example in the tutorial (http://fsprojects.github.io/Paket/github-dependencies.html):

paket.dependcies:

source https://nuget.org/api/v2

github fsharp/FAKE modules/Octokit/Octokit.fsx

I did however find a fix, this works:

paket.dependcies:

source https://nuget.org/api/v2

nuget CommandLineParser

github kshanafelt/commandline build.fsx

Also GitHub paths to files that didn't also have a paket.dependcies file in their same folder seemed to work. For example this worked for me:

paket.dependcies:

source https://nuget.org/api/v2

github kshanafelt/commandline  src/CommandLine/CommandLine.csproj

It's seems odd, but it seems that to pull a GitHub dependency that has a paket.dependcies file next to it, you also need to pull a nuget dependency.

I don't know much f#, or I would have tried to fix it, but the error seem to be coming from Seq.last here:
https://github.com/fsprojects/Paket/blob/2.2.1/src/Paket.Core/DependenciesFile.fs#L436