RegEx/YAML/Value.regex.ps1
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<# .SYNOPSIS Matches a YAML key .DESCRIPTION Matches a YAML key. The -Key can be customized. .EXAMPLE Get-Module Irregular | Split-Path | Get-ChildItem -Recurse -Force -Filter *.yml | ?<YAML_Key> -Key uses -IncludeInputObject | Foreach-Object { $_.InputObject | ?<YAML_Value> -Text $y -StartAt $_.Index -Count 1 } #> param( # The key to match. By default, this is any key. [string] $Key = '[^\:]+' ) [Regex]::new( $( <#?< New-RegEx -Description "Matches a YAML key" -Modifier Multiline -StartAnchor LineStart -Comment 'A key starts off a line' | New-RegEx -CharacterClass Whitespace -Min 0 -Comment 'Followed by whitespace' -Name Indent | New-Regex -Name InList ( New-RegEx -LiteralCharacter '-' | New-RegEx -CharacterClass Whitespace ) -Optional -Comment 'Followed by an optional list start' >#> @' (?<= # Matches a YAML key (?m)^ # A key starts off a line (?<Indent>\s){0,} # Followed by whitespace (?<InList>\-\s)? # Followed by an optional list start '@ + [Environment]::NewLine + $Key + [Environment]::NewLine <#?< New-RegEx -LiteralCharacter ':' -Comment 'Followed by colon' >#> @' \: # Followed by colon ) '@ <#?< New-RegEx -Atomic -Or @( New-RegEx -Atomic -Or @( New-RegEx -Name IsChild -Pattern ( New-RegEx -Before '[\r\n]{1,2}\k<Indent>\s{2}' ) -Optional | New-RegEx -Name Value ( New-RegEx -NoCapture -Min 1 ( New-RegEx -Pattern '[\r\n]{1,2}' | New-RegEx -Backreference Indent | New-RegEx -Atomic -Or @( New-RegEx -Pattern '\-\s' New-RegEx -Pattern '\s{2}' ) | New-RegEx -Pattern '[^\r\n]{1,}' ) ) New-RegEx -Pattern "[\s-[\r\n]]" -Comment "Inline values start with a single space" | New-Regex -Atomic -Or @( New-RegEx -Name IsBlock -Pattern '\|(?>\+|\-)?(?=[\r\n]{1,2})' -Optional | New-RegEx -Name Value ( New-RegEx -NoCapture -Min 1 ( New-RegEx -Pattern '[\r\n]{1,2}' | New-RegEx -Backreference Indent | New-RegEx -Atomic -Or @( New-RegEx -Pattern '\-\s' New-RegEx -Pattern '\s{2}' ) | New-RegEx -Pattern '[^\r\n]{1,}' ) ) New-RegEx -Name ValueInline ( New-RegEx -Not -LiteralCharacter "'`"" -CharacterClass NewLine, CarriageReturn -Repeat -Name Value -Comment "An unquoted value" ) New-RegEx -LiteralCharacter "'" | New-RegEx -Until ( New-RegEx -NotAfter "'" | New-RegEx -LiteralCharacter "'" ) -Name Value | New-RegEx -LiteralCharacter "'" -Comment "OR a single quoted value" New-RegEx -LiteralCharacter '"' | New-RegEx -Until ( New-RegEx -NotAfter '\\' | New-RegEx -LiteralCharacter '"' ) -Name Value | New-RegEx -LiteralCharacter '"' -Comment "OR a double quoted value" ) ) ) >#> @' (?> (?> (?<IsChild>(?=[\r\n]{1,2}\k<Indent>\s{2}))?(?<Value>(?:[\r\n]{1,2}\k<Indent>(?> \-\s | \s{2})[^\r\n]{1,}){1,}) | [\s-[\r\n]] # Inline values start with a single space (?> (?<IsBlock>\|(?>\+|\-)?(?=[\r\n]{1,2}))?(?<Value>(?:[\r\n]{1,2}\k<Indent>(?> \-\s | \s{2})[^\r\n]{1,}){1,}) | (?<ValueInline>(?<Value>[^\n\r\'\"]+) # An unquoted value ) | \'(?<Value>(?:.|\s){0,}?(?=\z|(?<!')\'))\' # OR a single quoted value | \"(?<Value>(?:.|\s){0,}?(?=\z|(?<!\\)\"))\" # OR a double quoted value ))) '@ ),'IgnoreCase,IgnorePatternWhitespace','00:00:01' ) |