Links issue descriptions, journal values and formatted custom fields

Autolinker will replace patterns in linkable fields of certain models so that they link to a given URL. Match groups in the pattern can be inserted into the URL. The patterns are setup in the plugin config (Administration > Plugins > Redmine Text Autolinker > Configure).

• The expression is the regular expression that will be linked on the issue fields.
• Don't use catch-alls like .* - they will greedily match the whole description. Instead use the non-greedy version: .*?
• To insert part of the matched expression into the URL, capture it in a match group.
• Each match group will be added to the URL inside the escaped section with the number of the group. For example ABC(\d+) will insert the number matched into {{ 1 }} in the URL.
• The expression ABC(\d+) and the URL http:https://example.com/{{ 1 }} will link the following urls:
  • ABC123 to http:https://example.com/123
  • ABC8 to http:https://example.com/8
• But it will not link
  • ABC 123 because it has a space. ABC ?(\d+) will allow for an optional space
  • ABC because there is no number.
  • abc321 because the regex is case sensitive.

If you want to add new models that can be linked, edit al_issue_patch.rb and add the class and fields to the list. For example:

[
  [Issue, :description],
  [Journal, :notes],
  [MyExtraClass, [:some_field, :another_field]]
]

An optional third element can be given to define a Proc that will be called with the instance of the class as an argument to determine if the field should be auto-linked. For example the CustomValue is only linked if it's custom field type is formatted.

[CustomValue, :value, if: Proc.new { |this|
  this.custom_field.format_store.has_key? 'text_formatting'
}]