functions/Match-Vars.ps1
|
function get-entry( [Parameter(mandatory=$true)] $key, [Parameter(mandatory=$true)] $map, $excludeProperties = @("project")) { $entry = $null if ($map[$key] -ne $null) { $entry = $map[$key] $vars = @() } else { foreach($kvp in $map.GetEnumerator()) { $pattern = $kvp.key $vars = match-varpattern $key $pattern if ($vars -ne $null) { $entry = $kvp.value break } } } if ($entry -ne $null) { #TODO: should we use a deep clone $entry2 = $entry.Clone() $entry2._vars = $vars $entry2 = replace-properties $entry2 -vars $vars -exclude $excludeProperties return $entry2 } return $entry } function replace-properties($obj, $vars = @{}, [switch][bool]$strict, $exclude = @()) { $exclude = @($exclude) if ($vars -eq $null) { throw "vars == NULL"} if ($obj -is [string]) { $replaced = replace-vars -text $obj -vars $vars return $replaced } elseif ($obj -is [System.Collections.IDictionary]) { $keys = $obj.keys.Clone() $keys = $keys | sort foreach($key in $keys) { if ($key -notin $exclude) { if ($obj[$key] -in $exclude) { continue } $self = $obj try { $obj[$key] = replace-properties $obj[$key] $vars -exclude ($exclude + @($obj)) } finally { $self = $null } } } return $obj } elseif ($obj -is [Array]) { $obj = $obj.Clone() for($i = 0; $i -lt $obj.length; $i++) { if ($obj[$i] -in $exclude) { continue } try { $obj[$i] = replace-properties $obj[$i] $vars -exclude ($exclude + @($obj)) } finally { } } } elseif ($strict) { throw "unsupported object" } return $obj } #TODO: support multiple matches per line function _replace-varline ([Parameter(Mandatory=$true)]$text, $vars = @{}) { $r = $text if ($vars -eq $null) { throw "vars == NULL"} foreach($kvp in $vars.GetEnumerator()) { $name = $kvp.key $val = $kvp.value if ($text -match "\{$name\}") { $r = $r -replace "\{$name\}",$val } # support also same placeholder as in template match elseif ($text -match "_$($name)_") { $r = $r -replace "_$($name)_",$val } } return $r } #TODO: support multiple matches per line function _replace-varauto([Parameter(Mandatory=$true)]$text) { if ($text -match "\{([a-zA-Z0-9_.:]+?)\}") { $name = $Matches[1] $varpath = $name $splits = $name.split(".") if (!($varpath -match ":")) { $varpath = "variable:" + $splits[0] } $val = $null if (test-path "$varpath") { $val = (get-item $varpath).Value for($i = 1; $i -lt $splits.length; $i++) { $s = $splits[$i] $val = $val.$s } } elseif (test-path "variable:self") { $selftmp = (get-item "variable:self").Value $val = $selftmp foreach($s in $splits) { $val = $val.$s } } if ($val -ne $null) { $text = $text -replace "\{$name\}",$val } } return $text } function convert-vars ([Parameter(Mandatory=$true)]$text, $vars = @{}, [switch][bool]$noauto = $false) { $text = @($text) | % { _replace-varline $_ $vars } if (!$noauto) { $text = @($text) | % { _replace-varauto $_ } } return $text } function get-vardef ($text) { $result = $null $m = [System.Text.RegularExpressions.Regex]::Matches($text, "_([a-zA-Z]+)"); if ($m -ne $null) { $result = $m | % { $_.Groups[1].Value } } return $result } function match-varpattern ($text, $pattern) { $result = $null $vars = @(get-vardef $pattern) if ($vars -eq $null) { return $null } $regex = $pattern -replace "_[a-zA-Z]+_","([a-zA-Z0-9]*)" $m = [System.Text.RegularExpressions.Regex]::Matches($text, $regex); if ($m -ne $null) { $result = $m | % { for($i = 1; $i -lt $_.Groups.Count; $i++) { $val = $_.Groups[$i].Value $name = $vars[$i-1] return @{ $name = $val } } } } return $result } new-alias Replace-Vars Convert-Vars |