From: kimmo.lehto@... Date: 2019-01-15T13:35:12+00:00 Subject: [ruby-core:91103] [Ruby trunk Feature#15538] Erb indenting / unindenting trim mode Issue #15538 has been reported by kke (Kimmo Lehto). ---------------------------------------- Feature #15538: Erb indenting / unindenting trim mode https://bugs.ruby-lang.org/issues/15538 * Author: kke (Kimmo Lehto) * Status: Open * Priority: Normal * Assignee: * Target version: ---------------------------------------- In `Erb`, would it be possible to add a new trim mode that would indent the following content to match the depth of the tag? The tag could for example be `<%|` and it would be enabled using `Erb.new(template, trim_mode: '|')` ## Reason Something like this looks nice: ``` ruby - horse <% ['cat', 'dog', 'goldfish'].each do |pet| %> <% unless pet == 'goldfish' %> - <%= pet %> <% end %> <% end %> ``` But unfortunately it will render with "extra" indentation: ``` - horse - cat - dog ``` With the `|` trim mode it could be written as: ```ruby - horse <%| ['cat', 'dog', 'goldfish'].each do |pet| %> .... <% end %> ``` And it would output as desired without the "extra" indentation. Currently, to produce such output, you have write your erb template without indentation or using a jumpy mixed indentation (code and content have different indentation levels but are interleaved) and it's not a very user/editor friendly way to work. ## Using with `=` It would also be handy if the `|` could be used with `<%=`, perhaps `<%|=`, this would be excellent for example when templating YAML's: ```yaml <% bar_content = "- something\n- something else" %> foo: bar: <%|= bar_content %> ``` Which would produce something like: ```yaml foo: bar: - something - something else ``` Instead of the invalid: ```yaml foo: bar: - something - something else ``` Currently there's no way to accomplish this without manually counting the leading spaces, as it's not possible to detect the column where `<%=` appeared. -- https://bugs.ruby-lang.org/ Unsubscribe: