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[eruby] Add erubi linter
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Erubi is yet another parser for eRuby. This is the default parser in
Rails as of version 5.1. It supports some additional syntax with similar
behavior to Rails' extensions to the language, though incompatible.
Rails currently still recommends their own syntax, so GetCommand still
has to do the translation introduced in
https://github.com/w0rp/ale/pull/1114 .
Erubi does not supply an executable—It is intended to be invoked only
from within a Ruby program. In this case, a one-liner on the command
line.
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The previous version relied on a zsh-specific behavior where
`<filename` after a pipe could redirect to the first command. This
is the standard way to do it.
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GetCommand conditionally adds a filter (implemented as inline Ruby code
in the command line) to transform some of the problematic
Rails-specific eRuby syntax. Specifically, <%= tags are replaced with
<%.
This does not reduce the effectiveness of the linter, because the
transformed code is still evaluated.
This solution was suggested by @rgo at
https://github.com/w0rp/ale/issues/580#issuecomment-337676607.
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GetCommand conditionally adds a filter (implemented as inline Ruby code
in the command line) to transform some of the problematic
Rails-specific eRuby syntax. Specifically, <%= tags are replaced with
<%.
This does not reduce the effectiveness of the linter, because the
transformed code is still evaluated.
This solution was suggested by @rgo at
https://github.com/w0rp/ale/issues/580#issuecomment-337676607.
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This linter works largely the same as the existing `erubylint` linter,
except it works with `erubis` instead of `erb` as the driving command.
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* Add eruby linter
* Update README with erb linter
* Fix example and contributions
* Remove trailing newline
* Fix for Vimscript style guide
* Eruby-linter: codereview with @w0rp
- read from stderro output_stream
* Eruby-linter: codereview => add handler for ruby
* Eruby-linter: codereview
- eruby and ruby lint use the same ruby-handler (removes
duplicated handling logic)
* Eruby-linter: try to fix tests
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