Functions/Get-WhiskeyNPMPath.ps1
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function Get-WhiskeyNPMPath { [CmdletBinding()] param( [Parameter(Mandatory=$true)] [string] $ApplicationRoot, [Parameter(Mandatory=$true)] [string] $NodePath ) Set-StrictMode -Version 'Latest' Use-CallerPreference -Cmdlet $PSCmdlet -SessionState $ExecutionContext.SessionState $npmGlobalPath = (Join-Path -Path ($NodePath | Split-Path) -ChildPath 'node_modules\npm\bin\npm-cli.js') $packageJsonPath = Resolve-Path -Path (Join-Path -Path $ApplicationRoot -ChildPath 'package.json') | Select-Object -ExpandProperty 'ProviderPath' $packageJson = Get-Content -Raw -Path $packageJsonPath | ConvertFrom-Json if ( ($packageJson | Get-Member -Name 'engines') -and ($packageJson.engines | Get-Member -Name 'npm') ) { if( $packageJson.engines.npm -notmatch '(\d+\.\d+\.\d+)' ) { Write-Error -Message ('NPM version ''{0}'' is invalid. The NPM version must be a valid semantic version. Package.json file ''{1}'', engines field:{2}{3}' -f $packageJson.engines.npm,$packageJsonPath,[Environment]::NewLine,($packageJson.engines | ConvertTo-Json -Depth 50)) return } $version = $Matches[1] $localNpmPath = (Join-Path -Path $ApplicationRoot -ChildPath 'node_modules\npm\bin\npm-cli.js') $localNpmMetadata = Get-Content -Path (Join-Path -Path $ApplicationRoot -ChildPath 'node_modules\npm\package.json') -Raw -ErrorAction Ignore | ConvertFrom-Json if ((Test-Path -Path $localNpmPath -PathType Leaf) -and ($localNpmMetadata.Version -eq $version)) { return $localNpmPath } Push-Location -Path $ApplicationRoot Try { $version = $Matches[1] $npmVersion = ('npm@{0}' -f $version) $activity = ('Installing local NPM version {0}' -f $version) Invoke-Command -ScriptBlock { & $NodePath $npmGlobalPath 'install' $npmVersion '--no-save' | Where-Object { $_ } | ForEach-Object { Write-Progress -Activity $activity -Status $_ ; } } Write-Progress -Activity $activity -Completed if ( $LASTEXITCODE ) { Write-Error -Message ('NPM failed to install NPM version ''{0}'' specified in package.json. NPM returned with exit code ''{1}''.' -f $version,$LASTEXITCODE) return } } finally { Pop-Location } return $localNpmPath } else { return $npmGlobalPath } } |