RegEx/Markdown/CodeBlock.regex.ps1
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<# .Synopsis Matches a code block .Description Matches a Markdown code block. Code blocks can start/end with 3 or more backticks or tildas, or 4 indented whitespaces #> param( # If set, will only match fenced code blocks. [Parameter(ValueFromPipelineByPropertyName)] [switch] $Fenced, # The languages [Parameter(ValueFromPipelineByPropertyName)] [Alias('InfoText')] [string] $Language ) process { $fencedBlock = @" (?<FenceChar>[``\~]){3,} # Code fences start with tildas or backticks, repeated at least 3 times $( if (-not $Language) { @" (?<Language>[\S]+)? # Match an optional language (non-whitespace characters) "@ } else { @" (?<Language> # Match a specific language $language ) "@ } ) \s{0,} # Match but do not capture initial whitespace. (?<Code> # Capture the <Code> block (?:.|\s){0,}? # This is anything until (?=\z|\k<FenceChar>{3,}) # the end of the string or the same matching fence chars ) (?>\z|\k<FenceChar>{3,}) "@ $fourSpacesBlock = @" (?m) (^\s{4}(?<Code>\s{0,}\S.+?)$){1,} # Match one or more lines starting with at least four whitespace characters "@ if ($Language) { @" (?> $($fencedBlock -join ' | ') ) "@ } else { @" (?> $($fencedBlock -join ' | ') | $fourSpacesBlock ) "@ } } |