scripts/Interpolate-Attributes.ps1
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function Interpolate-Attributes { [CmdletBinding()] param ( [Parameter(Position = 0, Mandatory = $true, ValueFromPipeline = $true)] [hashtable]$config ) process { $json = $config | ConvertTo-Json -Depth 99 -Compress $regex = [regex]'{{(?<subst>(?:(?!{{).)+?)}}' $counter = 0 "Interpolate-Attributes:In:$($counter):`$json:$json" | f-log-dbg do { foreach ($substitute in (Get-Matches $json $regex 'subst')) { "Interpolate-Attributes:$($counter):`$substitute:$substitute" | f-log-dbg if ($substitute -match '(?ms)^\$\((?<eval>.*)\)$') { "Interpolate-Attributes:$($counter):`$eval:{$($matches.eval)}" | f-log-dbg $value = "`"$($matches.eval)`"" | ConvertFrom-Json | Invoke-Expression } elseif ($substitute -match '(?ms)^(?<filter>\$\S+?):(?<input>.*)$') { "Interpolate-Attributes:$($counter):`$filter:{$($matches.filter)}:`$input:{$($matches.input)}" | f-log-dbg $value = "`"$($matches.input)`"" | ConvertFrom-Json | & f-$($matches.filter) "Interpolate-Attributes:$($counter):`$value:{$value}" | f-log-dbg } else { $value = Invoke-Expression "`$config.attributes.$substitute" -ErrorAction Stop if ($regex.Match($value).Success) { continue; } } $value = $value | f-null | ForEach-Object {(ConvertTo-Json $_ -Compress -Depth 99).Trim('"')} "Interpolate-Attributes:$($counter):`$value:{$value}" | f-log-dbg $json = $json.Replace("{{$substitute}}", "$value") } if ($counter++ -ge ${global:pwshake-context}.options.max_depth) { throw "Circular reference detected for substitutions: $($regex.Matches($json) | Sort-Object -Property Value)" } "Interpolate-Attributes:$($counter):`$json:`n$json" | f-log-dbg $config = ConvertFrom-Yaml $json $json = ConvertTo-Json $config -Depth 99 -Compress } while ($regex.Match($json).Success) return ConvertFrom-Yaml $json } } |