RegEx/Markdown/Heading.regex.ps1
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<# .Synopsis Matches Markdown Heading .Description Matches Markdown Headings. Can provide a -HeadingName, -HeadingLevel, and -IncludeContent. #> param( # The name of the heading. By default, will match any heading [Parameter(ValueFromPipelineByPropertyName)] [string] $HeadingName = '[^#]+?', # The level(s) of the heading. If not provided, will match a heading of any level. [ValidateRange(0,6)] [int[]] $HeadingLevel = 0, # If set, will include the content of the heading. This will match until the next heading start of any level. [switch] $IncludeContent ) if (-not $HeadingLevel) { $HeadingLevel = 6..1 } $HeadingLevel = $HeadingLevel | Sort-Object -Descending " (?m) # Set multline mode ^ # Anchor at line start \s{0,3} # Match Up to three whitespace characters, then one of: (?> " + (@( foreach ($hl in $HeadingLevel) { if ($hl -eq 1) { @' (?<HeadingName>\S.+?)$ # Match a line followed by \s+ # Some whitespace (in this case, the newline) ^\s{0,3}(?<h1>=+)\s{0,}$ # A line of all equals '@ } elseif ($hl -eq 2) { @' # Match SETEXT heading 1: (?<HeadingName>\S.+?)$ # A line of with at least one character of non-whitespace followed by \s+ # Some whitespace (in this case, the newline) ^\s{0,3}(?<h2>\-+)\s{0,}$ # A line of all dashes (with up to 3 leading spaces) '@ } @" # Match ATX heading $hl (?<h$hl>\#{$hl}) \s # A single whitespace followed by the heading name (?<HeadingName> $($HeadingName -replace '\s', '\s') ) (?:[\#\s]{0,})$ # Ignore any remaining #s or whitespace" "@ } ) -join ([Environment]::NewLine + (' ' * 4) + '|' + [Environment]::NewLine)) + ' ) ' + $( if ($IncludeContent) { @" (?<Content> # If including Content (?:.|\s){0,}? # Match anything until (?= ^\s{0,3} (?> # The start of another block [\#\-=~``] ) | # or \z # the end of the string. ) ) "@ } ) |