The fix causes a problem in debugging. When stepping over the scripts in debugging mode, the debugger will stop at the switch statement condition expression twice at the very beginning -- one for evaluating the condition, and one for iterating the condition.
Measure-Object should handle `ScriptBlock` properties. Fixed by renaming `MshExpression` to `PSPropertyExpression` and making it public. Then in `MeasureObjectCommand`, lifting it up to the parameter level. Previously the implementation exposed the Property as a string and
wrapped it internally as a `PSPropertyExpression`. Now the parameter type is `PSPropertyExpression` directly allowing for both wildcard strings and `ScriptBlock`.
`PSPropertyExpression` now lives in a public namespace where it can be used by cmdlet and script authors to easily add the same type of functionality to their commands. I also modified `PSPropertyExpression` to handle hashtables properly as objects so
@{prop = 3} | measure-object prop
and
@{prop = 3} | measure-object {$_.prop}
will work the same. (Previously the example using just the property name would fail.)
After parsing `if () { }`, new lines are skipped in order to see if either `elseif` or `else` is present. When neither is present, we should resync back to the pointer before skipping those possibly available new lines, so that the new line tokens can be utilized by the subsequent parsing.
`GetTypeInfo()` were added when porting PowerShell to early version of .NET Core (prior .NET Core 1.0).
Most properties and methods in `System.Type` were missing at that time. Now the call is not needed anymore and should be removed.
- Remove the calls to `GetTypeInfo()` in the generated `.resx` binding C# binding code (change in the tool `ResGen`).
- Remove the unused methods in `SessionState.cs`.
- Remove the calls to `GetTypeInfo()` from `Compiler.cs` and other files in `engine\runtime`.
- Fix typos in `VariableAnalysis.cs` and `ClassOps.cs`.
- Minor perf improvement in `MutableTuple.cs` by using indexing instead of linq extension method `last()`.
Many error messages in PowerShell currently use a LINQ expression to pass both the name of the error and the message through in the error processing. This PR uses the `nameof` feature to carry the error name/ID and gets rid of LINQ expression reflection, hopefully improving performance, especially in editor scenarios.
Based on standard practices, we need to have a copyright and license notice at the top of each source file. Removed existing copyrights and updated/added copyright notices for .h, .cpp, .cs, .ps1, and .psm1 files.
Updated module manifests for consistency to have Author = "PowerShell" and Company = "Microsoft Corporation". Removed multiple line breaks.
Separate PR coming to update contribution document for new source files: #6140
Manually reviewed each change.
Fix#6073
Breaking-change: "0".."9" returns [char] previously in PowerShell Core (6.0.0, 6.0.1), now it returns [int]. After the change, the behavior is the same as in Windows PowerShell.
The symbol resolver was properly resolving the type to the class
definition, but that resolution was ignored at runtime because we used
the string instead of the ITypeName - the ITypeName kept the reference
to the class definition.
Fix#5661
Using the assembly name to hint at the source of the classes was
problematic in multiple ways.
This change stores the actual filename in an attribute on the assembly.
So for a given type, one can get the assembly this way:
[SomeType].Assembly.GetCustomAttributes() |
? { $_ -is [System.Management.Automation.DynamicClassImplementationAssemblyAttribute] } |
% { $_.ScriptFile }
Previously we used IScriptPosition for context (e.g. error reporting)
during parameter binding, but in some cases we want more information, so
we'll use the Ast instead.
This change just adds the Ast, it doesn't make explicit use of it.
- Add 'ArgumentCompletionsAttribute' to support argument completion for parameters that cannot have a ValidateSetAttribute.
- Use 'ArgumentCompletionsAttribute' for the '-Format' parameter of 'Get-Date' to enable useful argument compeltions.
When handling file redirection for CommandExpression, we don't call 'DoComplete' on the underlying PipelineProcessor of the FileRedirection object, and thus the EndProcessing method is not called on Out-File, which causes different behaviors between <expr> > out.txt and <expr> | Out-File out.txt.
The fix is to make sure 'DoComplete' is called after the stream output has been written to the redirection pipe.
Also fix another issue
This PR also fixes an issue that could mess up restoring the original pipes. Here is the repro:
PS> 1 *> b.txt > a.txt; 123
Cannot perform operation because object "PipelineProcessor" has already been disposed
The root cause is that we don't always restore pipes in the correct order. Please see the code changes in Compiler.cs for more details.
Fix#4812
This round of cleanup focuses on the following areas
- Tab completion code
- InitialSessionState
- Compiler/MiscOps
- Utils/SessionStateFunctionAPIs
Changes in the rest affected files are mainly some corresponding changes due to the cleanup work in the above areas.
`Compiler.LoadModule` assumes that when `ps.HadErrors == true` the error stream is not empty. However, when `SilentlyContinue` is specified as the error action, the non-terminating error is not kept in `ErrorOutputPipe` of the cmdlet and thus does not appear in `ps.Streams.Error`. So when `ps.HadErrors == true` while `ps.Streams.Error` is empty, it suggests it's OK to ignore the errors because they are explicitly suppressed with `SilentlyContinue` error action.
So in my opinion, the expected behavior of `"using module .\mod.psm1"` in this case should be successful as if `ps.HaddErrors` is false.
GetMember/SetMember/InvokeMember operations on a COM object will generate code to unwrap the COM object if it's wrapped in PSObject. Due to a loose restriction, if you have a string wrapped to a PSObject with an ETS member of the same name, then the string PSObject will be unwrapped too and the ETS member will be lost. The fix is to use a more restricted rule by checking if the base object is a COM object.
This change fixes 3 issues:
- According to [PowerShell Language Specification Version 3.0](https://www.microsoft.com/en-us/download/details.aspx?id=36389), as quoted: "_The result is the (possibly empty) unconstrained 1-dimensional array_", `@(...)` should only return `object[]` array.
- `@([object[]]$null).GetType()` fails with error `"You cannot call a method on a null-valued expression."`
- `@([System.Collections.Generic.List[object]]$null)` fails with error `"Object reference not set to an instance of an object."`
- Fix PSScriptAnalyzer warnings of type PSAvoidUsingCmdletAliases for 'ForEach-Object' (alias is '%' or 'foreach')
- Fix PSScriptAnalyzer warnings of type PSAvoidUsingCmdletAliases for 'Where-Object' (alias is '?' or 'where')
- Fix PSScriptAnalyzer warnings of type PSAvoidUsingCmdletAliases for 'Select-Object' (alias is 'select')
- Fix PSScriptAnalyzer warnings of type PSPossibleIncorrectComparisonWithNull. Essentially, $null has to be on the left-hand side when using it for comparison.
- A Test in ParameterBinding.Tests.ps1 needed adapting as this test used to rely on the wrong null comparison
- Replace a subset of tests of kind '($object -eq $null) | Should Be $true' with '$object | Should Be $null'
Summary
----------
When the same script file gets executed in multiple Runspaces, the RuntimeType generated from the powershell class defined in the file will be shared among those Runspaces. For different Runspaces, different SessionState should be used to run the static methods.
Fix
---
We use the `SessionStateKeeper` to query for the correct `SessionState` to use for a static method call.
We already use `SessionStateKeeper` to track the `Runspace/SessionState` where a PowerShell class is defined, and thus we can leverage this for the static method invocation.
Currently `ValidateSetAttribute` accepts only explicit constants as valid values. This is a significant limitation. Sometimes we need to get valid values dynamically, ex., Azure VMs, logged-on users and so on. The PR add follow possibilities:
- pass a _custom type_ (a valid values generator) implementing `IValidateSetValuesGenerator` interface to get valid values dynamically.
- pass a _custom type_ (a valid values generator) derived from `CachedValidValuesGeneratorBase` abstract class to get valid values dynamically and _cache_ the list to share with other ValidateSetAttribute attributes.
This PR adds type inference support for the 'MemberName' parameterset for Foreach-Object.
Both of the following should work:
```
Get-Process | % {$_.MainModule} | % Com<Tab>
Get-Process | % MainModule | % Com<Tab>
```
Before this change, only the first line worked, this PR addresses the second line.
Fixes#2596
Remove the code that spins up our own assembly load context. Keep the code that registers our `Resolve` method to the default loader's `Resolving` event, so that we can continue to do special assembly resolution as needed (such as the GAC probing logic needed for consuming FullCLR PS modules).
Essentially, the assembly `Microsoft.PowerShell.CoreCLR.AssemblyLoadContext.dll` is not needed anymore, the remaining code should be moved to S.M.A.dll. However, that will break DSC and other native hosts that are hosting powershell. So this assembly is kept for now.
Implements support for backgrounding pipelines with &. Putting & at the end of a pipeline will cause the pipeline
to be run as a PowerShell job. When a pipeline is backgrounded a job object is returned. Once the pipeline is
running as a job, all of the normal job cmdlets can be used to manage the job. Variables (ignoring process-specific
variables) used in the pipeline are automatically copied to the job so
copy $foo $bar &
just works. The job is also run in the current directory instead of the user's home directory as is the case with Start-Job.Implement
This makes it possibe to write for example
[ValidatePattern('[A-Z]:', ErrorMessage='The Drive should be specified as a single letter followed by a colon, for example "D:"')]
[string] $Drive,
The element being validated is also passed, so {0} can be used in the custom error message
This change moves powershell to .NET Core 2.0. Major changes are:
1. PowerShell assemblies are now targeting `netcoreapp2.0`. We are using `microsoft.netcore.app-2.0.0-preview1-001913-00`, which is from dotnet-core build 4/4/17. We cannot target `netstandard2.0` because the packages `System.Reflection.Emit` and `System.Reflection.Emit.Lightweight`, which are needed for powershell class, cannot be referenced when targeting `netstandard2.0`.
2. Refactor code to remove most CLR stub types and extension types.
3. Update build scripts to enable CI builds. The `-cache` section is specified to depend on `appveyor.yml`, so the cache will be invalidated if `appveyor.yml` is changed.
4. Ship `netcoreapp` reference assemblies with powershell to fix the issues in `Add-Type` (#2764). By default `Add-Type` will reference all those reference assemblies when compiling C# code. If `-ReferenceAssembly` is specified, then we search reference assemblies first, then the framework runtime assemblies, and lastly the loaded assemblies (possibly a third-party one that was already loaded).
5. `dotnet publish` generates executable on Unix platforms, but doesn't set "x" permission and thus it cannot execute. Currently, the "x" permission is set in the build script, `dotnet/cli` issue [#6286](https://github.com/dotnet/cli/issues/6286) is tracking this.
6. Replace the use of some APIs with the ones that take `SecureString`.
7. osx.10.12 is required to update to `netcoreapp2.0` because `dotnet-cli` 2.0.0-preview only works on osx.10.12.
8. Add dependency to `System.ValueTuple` to work around a ambiguous type identity issue in coreclr. The issue is tracked by `dotnet/corefx` [#17797](https://github.com/dotnet/corefx/issues/17797). When moving to newer version of `netcoreapp2.0`, we need to verify if this dependency is still needed.
Our assembly cache contains assemblies that are explicitly loaded by powershell egine, such as via module loading or the assembly entries from InitialSessionState. We should search it before searching all loaded assemblies to give preference to resolve a type against the assemblies contained in the cache, so that in case there is a conflict, we might have a preferred assembly to use for a type resolution.
Changes:
- Search from context.AssemblyCache.Values before search from all loaded assemblies.
- Skip assemblies that we already searched and found no matching type.
- Skip checking PS types kept in the scope and type accelerators when it's not necessary.
Interactive hosts expect an `IncompleteParseException` to signal that more input is expected.
When detecting errors, the parser can report 2 positions:
* where the error should be reported
* where the error was detected
Typically these are the same, so most error reporting methods have a single parameter.
For missing braces, the pattern is supposed to be to report the error after the opening brace, but the error is typically detected at the end of the file.
There were a few places where we were not consistent in reporting such errors, this PR corrects those places.
Dongbo Wang