Psx

1.0.21284.43438

Pipeline/Pipeline.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

Set-StrictMode -Version Latest

<#

.SYNOPSIS

    Tests whether there is anything in a pipeline.

.DESCRIPTION

    This command will return $true if there is anything in the pipeline, or $false otherwise.

.EXAMPLE

    PS> Get-ChildItem | Test-Any

.NOTES

    See https://blogs.msdn.microsoft.com/jaredpar/2008/06/12/is-there-anything-in-that-pipeline/

    © 2020 be.stateless.

#>

function Test-Any {

    [CmdletBinding()]

    [OutputType([bool])]

    param(

        [Parameter(ValueFromPipeline = $true)]

        [AllowEmptyCollection()]

        [PSObject[]]

        $InputObject

    )

    begin {

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

        $any = $false

    }

    process {

        if (-not $any) {

            $InputObject | ForEach-Object -Process { $_ } | Where-Object -FilterScript { $null -ne $_ } | ForEach-Object -Process { $any = $true }

        }

    }

    end {

        $any

    }

}

<#

.SYNOPSIS

    Tests whether there is nothing in a pipeline.

.DESCRIPTION

    This command will return $true if there is nothing in the pipeline, or $false otherwise.

.EXAMPLE

    PS> Get-ChildItem | Test-None

.NOTES

    © 2020 be.stateless.

#>

function Test-None {

    [CmdletBinding()]

    [OutputType([bool])]

    param(

        [Parameter(ValueFromPipeline = $true)]

        [AllowEmptyCollection()]

        [PSObject[]]

        $InputObject

    )

    begin {

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

        $none = $true

    }

    process {

        if ($none) {

            $InputObject | ForEach-Object -Process { $_ } | Where-Object -FilterScript { $null -ne $_ } | ForEach-Object -Process { $none = $false }

        }

    }

    end {

        $none

    }

}

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