Update-GraphQLSchema.ps1

<#
.Synopsis
	Downloads or updates GraphQL schema using local StrawberryShake.Tools.
	https://gist.github.com/nightroman/f48f843483cd76a73f25cdd8a68fdd94

.Parameter Uri
		The GraphQL service URL.
		If it is omitted, .graphqlrc.json is used to get it.

.Parameter Path
		The schema file path.
		The default is 'schema.graphql'.
#>

[CmdletBinding()]
param(
	[Uri]$Uri
	,
	[string]$Path = 'schema.graphql'
)

$Path = $PSCmdlet.GetUnresolvedProviderPathFromPSPath($Path)
$Root = [IO.Path]::GetDirectoryName($Path)

### Get Uri

if (!$Uri) {
	$rc = Join-Path $Root .graphqlrc.json
	if (!(Test-Path -LiteralPath $rc)) {
		throw "Cannot resolve not specified Uri."
	}
	$data = [IO.File]::ReadAllText($rc) | ConvertFrom-Json
	$Uri = $data.extensions.strawberryShake.url
	if (!$Uri) {
		throw "Cannot get Uri as extensions.strawberryShake.url from $rc"
	}
}
Write-Host "Uri=$Uri"

### Download schema

Write-Host "Download schema $Path"
dotnet graphql download -f $Path $Uri | Out-Host
if ($LASTEXITCODE) {
	throw "download error code $LASTEXITCODE"
}

$remove = @'
"The name scalar represents a valid GraphQL name as specified in the spec and can be used to refer to fields or types."
scalar Name
"Delegates a resolver to a remote schema."
directive @delegate("The path to the field on the remote schema." path: String "The name of the schema to which this field shall be delegated to." schema: Name!) on FIELD_DEFINITION
directive @computed("Specifies the fields on which a computed field is dependent on." dependantOn: [Name!]) on FIELD_DEFINITION
"Annotates the original name of a type."
directive @source("The original name of the annotated type." name: Name! "The name of the schema to which this type belongs to." schema: Name!) repeatable on ENUM | OBJECT | INTERFACE | UNION | INPUT_OBJECT | FIELD_DEFINITION | INPUT_FIELD_DEFINITION | ARGUMENT_DEFINITION | ENUM_VALUE
'@

### Fix schema

Write-Host "Fix schema"
$remove = $remove -split '\r?\n'
$lines = Get-Content -LiteralPath $Path
$(
	for($$ = -1; ++$$ -lt $lines.Count) {
		$line = $lines[$$]
		if ($line -in $remove) {
			if ($line.StartsWith('directive') -and $lines[$$ + 1] -eq '') {
				++$$
			}
		}
		else {
			$line
		}
	}
) | Set-Content -LiteralPath $Path