Naive and simple kubectx and kubens implementations for Powershell

kubectx.ps1

Param(
    [Parameter(Mandatory = $false, Position = 0)]
    [string]$name
)

function current_context() {
    kubectl config view -o=jsonpath='{.current-context}'
}

function get_contexts() {
    kubectl config get-contexts -o=name | Sort-Object
}

function list_contexts() {
    $gctx = (get_contexts)
    $cur = (current_context)

    ForEach ($i in $gctx) {
        if ($i -eq $cur) {
            Write-Host "*" $i -ForegroundColor Red
        }
        else {
            Write-Host $i
        }
    }
}

function switch_context($context) {
    kubectl config use-context $context
}

if (![string]::IsNullOrEmpty($name)) { 
    switch_context $name 
}
else { 
    list_contexts 
}

kubens.ps1

Param(
    [Parameter(Mandatory = $false, Position = 0)]
    [string]$name
)

function currentContext() {
    return kubectl config current-context
}

function getNamespace() {
    Param(
        [Parameter(Mandatory = $false, Position = 0)]
        [string]$name
    )
    return kubectl config view -o=jsonpath="{.contexts[?(@.name=='${name}')].context.namespace}"
}

function setNamespace() {
    Param(
        [Parameter(Mandatory = $false, Position = 0)]
        [string]$name
    )
    $cur = currentContext
    $ret = kubectl config set-context "$cur" --namespace="${name}"
    Write-Host $ret
    if ($LASTEXITCODE -eq 0) {
        Write-Host "Switched to namespace $name"
    }
}


function listNamespaces() {
    $cur = getNamespace(currentContext)
    [string]$namespaces = (kubectl get namespaces -o=jsonpath="{range .items[*].metadata.name}{@}{','}{end}")
    $nsList = $namespaces.Split(",")
    ForEach ($i in $nsList) {
        if ($i -eq $cur) {
            Write-Host "*" $i -ForegroundColor Red
        }
        else {
            Write-Host $i
        }
    }
}
if (![string]::IsNullOrEmpty($name)) { 
    setNamespace $name 
}
else { 
    listNamespaces
}