Psx

1.0.20274.26594

ScriptBlock/ScriptBlock.ps1

                                #region Copyright & License

# Copyright © 2012 - 2020 François Chabot

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

#endregion

using namespace System.Management.Automation.Internal

using namespace System.Runtime.Serialization

Set-StrictMode -Version Latest

function Convert-ScriptBlockParametersToDynamicParameters {

    [CmdletBinding()]

    [OutputType([System.Management.Automation.RuntimeDefinedParameterDictionary])]

    param(

        [Parameter(Mandatory = $true)]

        [ValidateNotNullOrEmpty()]

        [scriptblock]

        $ScriptBlock

    )

    begin {

        # https://stackoverflow.com/questions/26910789/is-it-possible-to-reuse-a-param-block-across-multiple-functions

        $commonParameterNames = [FormatterServices]::GetUninitializedObject([CommonParameters]) |

            Get-Member -MemberType Properties |

            Select-Object -ExpandProperty Name

        $dynamicParameters = New-Object System.Management.Automation.RuntimeDefinedParameterDictionary

    }

    process {

        $ScriptBlock.Ast.ParamBlock | Select-Object -ExpandProperty Parameters |

        Where-Object -FilterScript { $commonParameterNames -notcontains $_.Name.VariablePath.UserPath } |

        ForEach-Object -Process {

            $paramName = $_.Name.VariablePath.UserPath

            $paramAttributes = New-Object System.Collections.ObjectModel.Collection[System.Attribute]

            $_.Attributes | ForEach-Object -Process {

                $attributeType = Invoke-Expression -Command "[$($_.TypeName.FullName)]"

                if ([System.Management.Automation.Internal.CmdletMetadataAttribute].IsAssignableFrom($attributeType)) {

                    $attribute = New-Object -TypeName $attributeType.FullName -ArgumentList @($_.PositionalArguments | ForEach-Object Value)

                    $_.NamedArguments | ForEach-Object -Process {

                        $attribute.($_.ArgumentName) = Invoke-Expression -Command ($_.Argument.Extent.Text)

                    }

                    $paramAttributes.Add($attribute)

                }

            }

            $param = New-Object System.Management.Automation.RuntimeDefinedParameter $paramName, $_.StaticType, $paramAttributes

            $dynamicParameters.Add($paramName, $param)

        }

    }

    end {

        $dynamicParameters

    }

}

function Invoke-ScriptBlock {

    [CmdletBinding()]

    [OutputType([void])]

    param(

        [Parameter(Mandatory = $true)]

        [ValidateNotNull()]

        [scriptblock]

        $ScriptBlock,

        [Parameter(Mandatory = $true)]

        [ValidateNotNull()]

        [hashtable]

        $Parameters

    )

    begin {

        Resolve-ActionPreference -Cmdlet $PSCmdlet -SessionState $ExecutionContext.SessionState

    }

    process {

        $expectedParameters = @( $ScriptBlock.Ast.ParamBlock | Select-Object -ExpandProperty Parameters | ForEach-Object -Process { $_.Name.VariablePath.UserPath } )

        $unexpectedParameters = @( $Parameters.Keys | Where-Object -FilterScript { $_ -notin $expectedParameters } )

        $unexpectedParameters | ForEach-Object -Process { $Parameters.Remove($_) | Out-Null }

        & $ScriptBlock @Parameters

    }

}

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