Convert syntax checkers to use standard input

[swsnr]

• ada-gnat (can't read from standard input)
• asciidoc
• c/c++-clang
• c/c++-gcc
• c/c++-cppcheck (can't read from stdin)
• cfengine (can't read from stdin)
• chef-foodcritic (can't read from stdin)
• coffee
• coffee-coffeelint
• coq (can't read from stdin)
• css-csslint (no stdin)
• d-dmd (no stdin)
• emacs-lisp (no stdin)
• emacs-lisp-checkdoc (no stdin)
• erlang (no stdin)
• eruby-erubis (behaves differently when using standard input)
• fortran-gfortran (can't read from stdin without language option, don't know the proper value)
• go-gofmt
• go-golint (no stdin, wants a package)
• go-vet (no stdin)
• go-build (no stdin)
• go-test (no stdin)
• go-errcheck (no stdin, wants a package)
• groovy (no stdin)
• haml
• handlebars
• haskell-stack-ghc (GHC can't read from standard input)
• haskell-ghc (GHC can't read from standard input)
• haskell-hlint (needs file extension to determine source format)
• html-tidy
• jade
• javascript-jshint
• javascript-eslint
• javascript-gjslint (doesn't read from stdin)
• javascript-jscs
• javascript-standard
• json-jsonlint (doesn't print errors when using standard input?!)
• less (no stdin support)
• luacheck
• lua
• perl
• perl-perlcritic
• php
• php-phpmd (can't read from stdin)
• php-phpcs
• puppet-parser
• puppet-lint (can't read from stdin)
• python-flake8
• python-pylint (doesn't read from stdin)
• python-pycompile (reads a list of files rather than source code from standard input)
• r-lintr (can't read from stdin)
• racket
• rpm-rpmlint (fails to read from stdin with a very obscure file not found error)
• rst
• rst-sphinx (can't read from stdin, works only on whole projects)
• ruby-rubocop
• ruby-rubylint
• ruby
• ruby-jruby
• rust (no standard input)
• sass
• scala (can't read from standard input)
• scala-scalastyle (can't read from standard input)
• scss-lint
• scss
• sh-bash
• sh-posix-dash
• sh-posix-bash
• sh-zsh (zsh doesn't include column numbers when reading from standard input 😞)
• sh-shellcheck
• slim
• sql-sqlint
• tex-chktex
• tex-lacheck (does not support standard input)
• texinfo
• verilog-verilator (can't read from stdin)
• xml-xmlstarlet
• xml-xmllint
• yaml-jsyaml
• yaml-ruby

[purcell]

One thing I noticed along the way is that it's often worth trying - as the filename: it's a long-standing UNIX convention taken to mean "stdin".

[kyptin]

I get errors popping up every few seconds in emacs' minibuffer because the version of rubocop that my project uses is v0.31.0, and rubocop didn't add support for the --stdin option until v0.34.0. Might be worth checking that the --stdin option is supported before trying to use it. Thanks!

[kyptin]

Also, I see now that the docstring for the ruby-rubocop checker includes a note about requiring v0.34.0. But the error message I got (shown below) didn't include this information. Might be worth augmenting the message. Anyway, thanks for your efforts on this! Meantime, I'll work on upgrading this project to rubocop v0.34.0. Cheers!

Suspicious state from syntax checker ruby-rubocop: Checker ruby-rubocop returned non-zero exit code 1, but no errors from output: invalid option: --stdin

[swsnr]

@kyptin Thanks, but I don't think it's worth the effort. It's a corner case, arguably, and probing tools for supported options is going to end up in a kitchen sink of maintenance code :)

[kyptin]

Fair enough. At least now Google can find this thread, and people will know that updating rubocop should solve the issue. Thanks!

[swsnr]

@kyptin Well, see #771 ☺️

[kyptin]

Ha, fair enough! I guess Google hasn't found that yet. :-)

[swsnr]

All syntax checkers were converted as far as possible.

[purcell]

Nice work @lunaryorn !

[swsnr]

@purcell Thank you 😊

[cpitclaudel]

Seconded; this is an amazing step for Flycheck :)