trying to use function string:find/2but every time getting the error
CRASH REPORT Process <0.779.0> with 0 neighbours exited with reason: {{undef,[{string,find,[[<<208,162,51,32,208,190,208,177,209,137,46,44,32,84,51,32,116,111,116,97,108,44>>],[<<208,186,209,128,208,190,208,178>>]],[]},{proxy_layer_cli_handle_req,do_execute_keysearch,4,[{file,\"/opt/proxy_layer/_build/test/lib/proxy_layer/src/proxy_layer_cli_handle_req.erl\"},{line,222}]},{proxy_layer_cli_handle_req,keysearch,3,[{file,\"/opt/proxy_layer/_build/test/lib/proxy_layer/src/proxy_layer_cli_handle_req.erl\"},{line,...}]},...]},...}
when i use it in terminal - everything is okay
1> string:find(<<208,162,51,32,208,190,208,177,209,137,46,44,32,84,51,32,116,111,116,97,108,44>>,<<208,186,209,128,208,190,208,178>>).
1> nomatch
I'm using Erlang 20.1
here is the code which I use:
do_execute_keysearch([First|Rest], PriceList, Keyword, Acc) ->
Id = utils:get_value(<<"Id">>, First),
case utils:get_value(<<"Keywords">>, First) of
<<>> -> do_execute_keysearch(Rest, PriceList, Keyword, Acc);
undefined -> do_execute_keysearch(Rest, PriceList, Keyword, Acc);
Keys ->
case string:find(Keys, Keyword) of
nomatch ->
do_execute_keysearch(Rest, PriceList, Keyword, Acc);
_ ->
Price = find_price_by_service_id(PriceList, Id),
NewAcc = [lists:append(Price, First) | Acc],
do_execute_keysearch(Rest, PriceList, Keyword, NewAcc)
end
end;
UPDATE:
Issue fixed after changing Erlang version in docker container. (Changed to Erlang 20.1)
Don’t know why there are some modules undefined in Erlang 19
So the problem solved now
string:find/2 was added to Erlang in version 20 which is why you were getting an undef error in Erlang 19. The solution is to upgrade to Erlang 20 (which you've already done).
Look at the error more carefully. Or rather, try to reproduce it. Which of these looks more like your error?
1> catch lists:nonexist(<<1>>, <<2>>).
{'EXIT',{undef,[{lists,nonexist,[<<1>>,<<2>>],[]},
{erl_eval,do_apply,6,[{file,"erl_eval.erl"},{line,674}]},
{erl_eval,expr,5,[{file,"erl_eval.erl"},{line,431}]},
{shell,exprs,7,[{file,"shell.erl"},{line,687}]},
{shell,eval_exprs,7,[{file,"shell.erl"},{line,642}]},
{shell,eval_loop,3,[{file,"shell.erl"},{line,627}]}]}}
2> catch lists:nonexist([<<1>>], [<<2>>]).
{'EXIT',{undef,[{lists,nonexist,[[<<1>>],[<<2>>]],[]},
{erl_eval,do_apply,6,[{file,"erl_eval.erl"},{line,674}]},
{erl_eval,expr,5,[{file,"erl_eval.erl"},{line,431}]},
{shell,exprs,7,[{file,"shell.erl"},{line,687}]},
{shell,eval_exprs,7,[{file,"shell.erl"},{line,642}]},
{shell,eval_loop,3,[{file,"shell.erl"},{line,627}]}]}}
I have a F# fake script which works with Nuge.Core to extract package files. If I try to do this with c# console app everything works properly. However if I execute exactly the same script in a f# fake script it is not working. There are so many dependencies here and I have no idea where to look for a help: docker.dotnet, fake, f#, nuget.core
To reproduce this you need to download Docker.DotNet.2.124.3.nupkg
For the c# sample you need console application and to install nuget.core nuget package. This is working!
class Program
{
static void Main()
{
var zip = new NuGet.ZipPackage(#"Docker.DotNet.2.124.3.nupkg");
foreach (var file in zip.GetFiles())
{
System.Console.WriteLine(file.Path);
}
}
}
For the f# sample you need these two files side by side:
https://gist.github.com/mynkow/e6f0e550fcacc268dd1e9b743e17d344
ERROR:
==============================================================================
FsiEvaluationException:
Error: System.InvalidOperationException: 'NETStandard.Library' already has a dependency defined for 'Microsoft.NETCore.Platforms'.
at NuGet.Manifest.ValidateDependencySets(IPackageMetadata metadata)
at NuGet.Manifest.Validate(Manifest manifest)
at NuGet.Manifest.ReadFrom(Stream stream, IPropertyProvider propertyProvider, Boolean validateSchema)
at NuGet.LocalPackage.ReadManifest(Stream manifestStream)
at NuGet.ZipPackage.EnsureManifest(Func`1 manifestStreamFactory)
at NuGet.ZipPackage..ctor(String filePath, Boolean enableCaching)
at <StartupCode$FSI_0005>.$FSI_0005_Test$fsx.main#() in C:\Users\mynkow\Desktop\Reproduce\test.fsx:line 12
Stopped due to error
Output: [Loading C:\Users\mynkow\Desktop\Reproduce\test.fsx]
==============================================================================
Input: C:\Users\mynkow\Desktop\Reproduce\test.fsx
\Arguments:
C:\fsi.exe
Exception: Yaaf.FSharp.Scripting.FsiEvaluationException: Error while compiling or executing fsharp snippet. ---> System.Exception: Operation failed. The error text has been print the error stream. To return the corresponding FSharpErrorInfo use the EvalInteractionNonThrowing, EvalScriptNonThrowing or EvalExpressionNonThrowing
at Microsoft.FSharp.Compiler.Interactive.Shell.FsiEvaluationSession.commitResult[a,b](FSharpChoice`2 res)
at Microsoft.FSharp.Compiler.Interactive.Shell.FsiEvaluationSession.EvalScript(String filePath)
at Yaaf.FSharp.Scripting.Helper.evalScript#1303.Invoke(String arg00) in C:\code\FAKE\paket-files\matthid\Yaaf.FSharp.Scripting\src\source\Yaaf.FSharp.Scripting\YaafFSharpScripting.fs:line 1303
at Yaaf.FSharp.Scripting.Helper.save_#1276-2.Invoke(Unit unitVar0) in C:\code\FAKE\paket-files\matthid\Yaaf.FSharp.Scripting\src\source\Yaaf.FSharp.Scripting\YaafFSharpScripting.fs:line 1277
at Yaaf.FSharp.Scripting.Helper.consoleCapture[a](TextWriter out, TextWriter err, FSharpFunc`2 f) in C:\code\FAKE\paket-files\matthid\Yaaf.FSharp.Scripting\src\source\Yaaf.FSharp.Scripting\YaafFSharpScripting.fs:line 1221
at Yaaf.FSharp.Scripting.Helper.redirectOut#1247[a](Boolean preventStdOut, OutStreamHelper out, OutStreamHelper err, FSharpFunc`2 f) in C:\code\FAKE\paket-files\matthid\Yaaf.FSharp.Scripting\src\source\Yaaf.FSharp.Scripting\YaafFSharpScripting.fs:line 1254
at Yaaf.FSharp.Scripting.Helper.save_#1275-1.Invoke(String text) in C:\code\FAKE\paket-files\matthid\Yaaf.FSharp.Scripting\src\source\Yaaf.FSharp.Scripting\YaafFSharpScripting.fs:line 1276
--- End of inner exception stack trace ---
at Yaaf.FSharp.Scripting.Helper.save_#1275-1.Invoke(String text) in C:\code\FAKE\paket-files\matthid\Yaaf.FSharp.Scripting\src\source\Yaaf.FSharp.Scripting\YaafFSharpScripting.fs:line 1284
at Yaaf.FSharp.Scripting.Helper.session#1306.Yaaf-FSharp-Scripting-IFsiSession-EvalScriptWithOutput(String ) in C:\code\FAKE\paket-files\matthid\Yaaf.FSharp.Scripting\src\source\Yaaf.FSharp.Scripting\YaafFSharpScripting.fs:line 1308
at Fake.FSIHelper.runScriptUncached(Boolean useCache, String scriptPath, IEnumerable`1 fsiOptions, Boolean printDetails, CacheInfo cacheInfo, TextWriter out, TextWriter err) in C:\code\FAKE\src\app\FakeLib\FSIHelper.fs:line 471
System.InvalidOperationException: 'NETStandard.Library' already has a dependency defined for 'Microsoft.NETCore.Platforms'.
at NuGet.Manifest.ValidateDependencySets(IPackageMetadata metadata)
at NuGet.Manifest.Validate(Manifest manifest)
at NuGet.Manifest.ReadFrom(Stream stream, IPropertyProvider propertyProvider, Boolean validateSchema)
at NuGet.LocalPackage.ReadManifest(Stream manifestStream)
at NuGet.ZipPackage.EnsureManifest(Func`1 manifestStreamFactory)
at NuGet.ZipPackage..ctor(String filePath, Boolean enableCaching)
at <StartupCode$FSI_0005>.$FSI_0005_Test$fsx.main#() in C:\Users\mynkow\Desktop\Reproduce\test.fsx:line 12
Stopped due to error
I have tried with the 5 latest versions of all possible dependencies and the results are exactly the same => c# is working, f# is not. Do you have any clue or just anything which you can advise me to try to fix this?
DIRTY SOLUTION:
This is how the Docker.DotNet.2.124.3.nupkg looks like inside
If I remove for example the netstandard1.6 everything works. This means that the problem is in nuget.core, right? But why it is working in c# console app? No idea!
UPDATE: I am able to execute properly the code from F# console application
I've downloaded the packages with paket, and changed the script this way:
#r #"./packages/FAKE/tools/FakeLib.dll"
#r #"./packages/NuGet.Core/lib/net40-Client/NuGet.Core.dll"
open System
open System.Collections.Generic
open System.IO
open Fake
Target "Test" (fun _ ->
printfn "=============================================================================="
global.NuGet.ZipPackage(#"Docker.DotNet.2.124.3.nupkg").GetFiles() |> Seq.iter(fun x -> printfn "%s" x.Path )
)
RunParameterTargetOrDefault "target" "test"
It gives this
Microsoft (R) F# Interactive version 14.0.23413.0
Copyright (c) Microsoft Corporation. All Rights Reserved.
For help type #help;;
>
--> Referenced 'C:\tmp\visualfsharp.issue.nuget\./packages/FAKE/tools/FakeLib.dll'
--> Referenced 'C:\tmp\visualfsharp.issue.nuget\./packages/NuGet.Core/lib/net40-Client/NuGet.Core.dll'
Building project with version: LocalBuild
Shortened DependencyGraph for Target Test:
<== Test
The resulting target order is:
- Test
Starting Target: Test
==============================================================================
Running build failed.
Error:
System.InvalidOperationException: The schema version of 'Docker.DotNet' is incompatible with version 1.6.30117.9648 of NuGet. Please upgrade NuGet to the latest version from http://go.microsoft.com/fwlink/?LinkId=213942.
at NuGet.Manifest.CheckSchemaVersion(XDocument document)
at NuGet.Manifest.ValidateManifestSchema(XDocument document, String schemaNamespace)
at NuGet.Manifest.ReadFrom(Stream stream, IPropertyProvider propertyProvider)
at NuGet.ZipPackage.EnsureManifest()
at FSI_0002.clo#9.Invoke(Unit _arg1) in C:\tmp\visualfsharp.issue.nuget\test.fsx:line 11
at Fake.TargetHelper.runSingleTarget(TargetTemplate`1 target) in C:\code\FAKE\src\app\FakeLib\TargetHelper.fs:line 493
---------------------------------------------------------------------
Build Time Report
No target was successfully completed
---------------------------------------------------------------------
---------------------------------------------------------------------
val it : unit = ()
>
The version of NuGet.Core is 2.12, and I'm seeing it is referencing Microsoft.Web.Xdt which is not loaded.
Maybe you can achieve what you want by simply using paket and adding Docker.DotNet as a dependency, it will extract it for you.
If you have reproducible error that you described, please make a zip and post an issue to visualfsharp repository.
I want to automate the build process of my project using FAKE which requires me to run a grunt task.
In particular, I want to create a target that runs the grunt build task in a subfolder of the solution folder. Due to my lack of F# knowledge, I was not able to pass multiple parameters to the static Exec method of the Shell class. https://fsharp.github.io/FAKE/apidocs/fake-processhelper-shell.html
This is what I have got so far:
Target "RunGrunt" (fun _ ->
let errorCode = Shell.Exec "grunt" "build" "\Frontend"
()
)
This fails with the following error message:
build.fsx(38,23): error FS0003: This value is not a function and cannot be applied
If I remove the last 2 parameters, it works, but fails to find grunt at runtime:
System.ComponentModel.Win32Exception (0x80004005): The system cannot find the file specified
at System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo)
at System.Diagnostics.Process.Start()
at Fake.ProcessHelper.start(Process proc) in C:\code\fake\src\app\FakeLib\ProcessHelper.fs:line 22
at Fake.ProcessHelper.asyncShellExec#424-2.Invoke(Process _arg1) in C:\code\fake\src\app\FakeLib\ProcessHelper.fs:line 428
at Microsoft.FSharp.Control.AsyncBuilderImpl.callA#851.Invoke(AsyncParams`1 args)
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.FSharp.Control.AsyncBuilderImpl.commit[a](Result`1 res)
at Microsoft.FSharp.Control.CancellationTokenOps.RunSynchronously[a](CancellationToken token, FSharpAsync`1 computation, FSharpOption`1 timeout)
at Microsoft.FSharp.Control.FSharpAsync.RunSynchronously[T](FSharpAsync`1 computation, FSharpOption`1 timeout, FSharpOption`1 cancellationToken)
at FSI_0001.Build.clo#34-6.Invoke(Unit _arg5) in D:\Development\Repos\FMVEAv2\Fmvea2-frontend\build.fsx:line 36
at Fake.TargetHelper.runSingleTarget(TargetTemplate`1 target) in C:\code\fake\src\app\FakeLib\TargetHelper.fs:line 483
Grunt is included in the path variable. (it works if called from the command line)
My questions are:
How can I pass multiple parameters to the Shell.Exec method?
How to run grunt, without including the complete path to it?
Both problems are now solved.
John pointed out in a comment to use tuple style instead of curried form which results in the following code:
Shell.Exec( "grunt","build","\FrontEnd")
FAKE provides a method to find a file on the path. http://fsharp.github.io/FAKE/apidocs/fake-processhelper.html
The target definition therefore looks like this:
Target "RunGrunt" (fun _ ->
let grunt = tryFindFileOnPath if isUnix then "grunt" else "grunt.cmd"
let errorCode = match grunt with
| Some g -> Shell.Exec(g, "build", "FrontEnd")
| None -> -1
()
)
neftedollar made a good point in the comments about cross platform compatiblity: Using the EnvironmentHelper to determine the platform and search for the correct executable of grunt.
I'm working on an erlang program and getting a strange runtime error. Any idea why? Thanks!
The errors are (after compiling the program successfully):
8> PID = spawn(planner,start,[]).
** exception error: no match of right hand side value <0.65.0>
9>
This is the program:
-module(planner).
-export([start/0]).
start() ->
loop([],[]).
loop(ContactsList,EventsList) ->
receive
{contact, Last, First, Number} ->
loop([{Last,First,Number}|ContactsList],EventsList);
{event, Date, Time, What} ->
loop([{Date,Time,What}|ContactsList],EventsList);
print_contacts ->
NewList=lists:sort(ContactsList),
lists:foreach(fun(Elem)->io:format("~p~n", [Elem]) end, NewList),
loop(ContactsList,EventsList);
print_events ->
NewList=lists:sort(EventsList),
lists:foreach(fun(Elem)->io:format("~p~n", [Elem]) end, NewList),
loop(ContactsList,EventsList);
exit ->
io:format("Exiting.~n");
_ ->
io:format("Dude, I don't even know what you're talking about.~n"),
loop(ContactsList,EventsList)
end.
The variable PID is probably set to something else but <0.65.0> from an earlier line you entered in the shell:
5> PID = spawn(...).
<0.42.0>
8> PID = spawn(...).
** exception error: no match of right hand side value <0.65.0>
This effectively makes the line which generates the error something like
8> <0.42.0> = <0.65.0>.
which will result in a "no match" error.
More obvious illustration of the issue:
1> X = 1.
1
2> X = 2.
** exception error: no match of right hand side value 2
As to solving your issue: You probably want to run f(PID) to have the shell forget just the PID variable, or even f() to have the shell forget ALL variables.