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| $package = (Get-Content package.json) | ConvertFrom-Json | Select-Object -Property name,version | |
| $versions = npm view $package.name versions | ConvertFrom-json | |
| if ($versions[1] -split "`n" -contains $package.version) { | |
| throw "Package $($package.name) already has version $($package.version) published" | |
| } |
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