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master (in development)

  • New syntax checkers:

    • Processing [GH-793] [GH-812]

  • Improvements:

    • Map error IDs from flake8-pep257 to Flycheck error levels

  • Bug fixes:

    • Fix folding of C/C++ errors from included files [GH-783]
    • Fix verification of SCSS-Lint checkstyle reporter
    • Don’t fall back to rust if rust-cargo should be used [GH-817]
    • Don’t change current buffer when closing the error message buffer [GH-648]
    • Never display error message buffer in current window [GH-822]

0.25.1 (Nov 16, 2015)

  • Fix undefined function call in emacs-lisp syntax checker [GH-791]

0.25 (Nov 14, 2015)

  • Breaking changes:

    • scala-scalastyle now expects a scalastyle executable in exec-path [GH-763]
    • Drop support for legacy Ruby YAML implementations prior to Ruby 1.9.3 in ruby-yaml
    • Remove racket syntax checker due to possible code execution [GH-786]

  • New syntax checkers:

    • JSON with Python’s built-in json module [GH-758]
    • Rust with cargo rustc [GH-772]

  • New features:

    • Add flycheck-help-echo-function to customize the Help Echo of Flycheck overlays [GH-730]
    • Use symbolic error IDs in Pylint [GH-714]
    • Add flycheck-pylint-use-symbolic-id to disable symbolic IDs for Pylint [GH-714]
    • Add flycheck-command-wrapper-function to wrap syntax checker commands before execution [GH-629] [GH-752]
    • Add flycheck-executable-find to customise how Flycheck searches executables [GH-752]
    • Add flycheck-hlint-args to pass additional arguments to hlint [GH-713] [GH-762]
    • Add flycheck-go-build-tags and flycheck-go-install-deps to specify tags and automatically install dependencies with go build [GH-674]
    • Add :standard-input property to syntax checkers to read source from standard input [GH-673] [GH-728]
    • Add support for JSX modes to some Javascript checkers [GH-778]

  • Improvements:

    • Improve mode line display for buffers with only info messages [GH-733]
    • Merge messages of all errors under cursor for Help Echo [GH-730]
    • Align multi-line messages in error list [GH-732] [GH-731]
    • Cache GHC output for faster syntax checking and better template haskell support [GH-708]
    • Fall back to rst if rst-sphinx is disabled [GH-745] [GH-746]
    • New uniform fringe indicators [GH-750]
    • Demote AsciiDoc deprecation warnings to info level

  • Bug fixes:

    • Fix error patterns of coq [GH-742]
    • Support GFortran 5 [GH-751]
    • Fix stack overflow when parsing hlint errors [GH-760]
    • Fix error columns of jsonlint

0.24 (Aug 15, 2015)

  • Breaking changes:

    • Remove Elixir syntax checker due to code execution [GH-630]
    • Drop support for Emacs 24.1 and 24.2

  • New syntax checkers:

    • Javascript with jscs [GH-634] and standard [GH-644]
    • Jade [GH-686]
    • SQL with sqllint [GH-691]
    • Groovy [GH-716]
    • Haskell with stack ghc [GH-711]

  • New features:

    • The error list can now be filtered by error level by pressing f
    • Add flycheck-error-list-minimum-level to restrict error levels displayed in the error list [GH-698] [GH-701]
    • Add flycheck-perl-include-path to set include directories for Perl [GH-621]
    • Add flycheck-rust-args to pass additional arguments to rustc
    • Add flycheck-dmd-args to pass additional arguments to dmd [GH-655]
    • Add flycheck-erlang-include-path [GH-668] and flycheck-erlang-library-path [GH-696] for Erlang
    • Add flycheck-verilator-include-path to set include directories for Verilator [GH-684]
    • Add flycheck-cppcheck-include-path to set include directories for cppcheck [GH-687]
    • Add support for Hlint configuration file [GH-682]
    • Add Hlint options for ignore rules, language extensions and hint packages [GH-682]

  • Improvements:

    • Show chained checkers in Help buffers for syntax checkers [GH-571]
    • Map custom error levels to compilation mode levels [GH-700]
    • flycheck-verify-setup now includes the manually selected checker if any [GH-705]
    • flycheck-select-checker now shows a verification buffer if the selected checker cannot be used [GH-705]
    • Add flycheck-verify-checker to check whether a specific syntax checker can be used in a buffer [GH-705]

  • Bug fixes:

    • Fix offset of column numbers in ESLint [GH-640]
    • Properly parse indentation errors from Python 2.7 [GH-635]
    • Don’t choke if default-directory does not exist [GH-625]
    • Fix error parsing for Puppet 4
    • Fix duplicate checkdoc errors on Emacs 25
    • Fix level of info messages in flycheck-compile [GH-669]
    • Allow custom :verify functions for command checkers [GH-672]
    • Fix error when flycheck-scalastylerc was set to a non-existing file
    • Fix error column offsets in scala-scalastyle
    • Do not use r-lintr in non-R buffers [GH-607]
    • Enforce output format of flake8 [GH-704]
    • Parse error ids from luacheck 0.11
    • Fix patterns for Puppet environment names [GH-694]
    • Properly locate configuration files from jshint and jscs [GH-703]
    • Fix column offsets in eslint 1.0 [GH-718]

0.23 (Apr 6, 2015)

  • Breaking changes:

    • New manual in native Texinfo format, to achieve higher quality Info manuals
    • Remove make syntax checker due to various issues [GH-572] [GH-573]
    • Remove zsh support from sh-shellcheck, since Shellcheck does not support Zsh anymore
    • Remove global-flycheck-mode from customization interface [GH-595]

  • New syntax checkers:

    • R with lintr [GH-512]
    • Lua with luacheck [GH-591] [GH-609]
    • SCSS with scss-lint [GH-582] [GH-598]

  • New features:

    • Add flycheck-disable-checker to disable a syntax checker in the current buffer
    • Add flycheck-global-modes to control in which modes global-flycheck-mode turns on flycheck-mode
    • Add pedantic and pedantic-errors options to Clang and GCC [GH-543]
    • Add flycheck-foodcritic-tags to select tags for Foodcritic [GH-560]

  • Improvements:

    • chef-foodcritic handles relative paths correctly now [GH-556]
    • Global Flycheck Mode enables Flycheck Mode even if there is no syntax checker for the buffer yet [GH-568]
    • handlebars now supports Web Mode [GH-605]
    • Extract error IDs from rustc
    • Don’t cache last syntax checker in buffer anymore

  • Bug fixes:

    • Fix void variable error when trying to use flycheck-compile with a non-command checker [GH-563]
    • Fix faulty mode line reporting [GH-564]
    • Automatically initialize packages when checking user-init-file
    • Properly initialize hook variables [GH-593]
    • Fix handling of file names with symbolic links for some checkers [GH-561]
    • Parse multiline type errors from rustc [GH-592]

0.22 (Dec 23, 2014)

  • Breaking changes:

    • Never allow use of disabled checkers anymore, even with flycheck-select-checker
    • Error parsers must set the :buffer and :checker slots of flycheck-error now
    • The internals of syntax checker definitions have changed again. All packages depending on Flycheck must be recompiled! [GH-524]
    • flycheck-error-list-refresh is not an interactive command anymore
    • Replace flycheck-perlcritic-verbosity with flycheck-perlcritic-severity
    • Replace flycheck-copy-messages-as-kill with flycheck-copy-errors-as-kill [GH-529]
    • Remove flycheck-google-messages command
    • Options and config file variables are not buffer-local anymore [GH-546]

  • New syntax checkers:

    • Python with py_compile [GH-484]

  • New features:

    • flycheck-ert.el library to write unit tests for Flycheck extensions
    • Add flycheck-define-generic-checker to define syntax checkers over arbitrary Emacs Lisp functions [GH-169] [GH-524]
    • Add flycheck-define-command-checker as non-macro variant of flycheck-define-checker [GH-524]
    • Add support for IDs of errors [GH-529]
    • Add special id sexp to parse error ids with :error-patterns [GH-529]
    • Parse error IDs from Checkstyle XML [GH-259]
    • flycheck-copy-errors-as-kill can put error ids into kill ring now [GH-529]
    • Parse error IDs from many error checkers [GH-259]
    • Verify Flycheck setup in a buffer with flycheck-verify-setup [GH-338]
    • Add options for arbitrary arguments to some syntax checkers [GH-542]
    • Add flycheck-flake8-error-level-alist to customize error levels from flake8 [GH-454]

  • Improvements:

    • Automatically disable syntax checkers that report too many errors [GH-476]
    • Reduce filesystem access when parsing errors to improve parsing speed
    • Add explicit load-path inheritance to flycheck-emacs-lisp-load-path, via new inherit value [GH-511]
    • Parse help messages from rustc [GH-517]
    • g in the error list checks the source buffer again [GH-532]
    • haskell-ghc supports literate Haskell now [GH-535]

  • Bug fixes:

    • Properly parse notes in sh-shellcheck [GH-508]
    • Fix shell quoting in flycheck-compile [GH-522] [GH-523]
    • Fix faulty properties of customize options which broke customize-changed and related functions
    • Fix use deprecated option in coffee-coffeelint
    • Fix error columns of python-pylint and tex-chktex [GH-536]
    • Correctly compute error level of errors on included files in c/c++-clang and c/c++-gcc [GH-451]

0.21 (Oct 26, 2014)

  • Breaking changes:

    • html-tidy is not enabled in Web Mode anymore [GH-464]
    • d-dmd now requires DMD 2.066 or newer [GH-460]
    • :next-checkers now requires the maximum permissible level instead of a custom predicate [GH-472]
    • Remove flycheck-error-list-highlight-at-point face and related functionality [GH-490]

  • New syntax checkers:

    • Coq
    • RPM spec files with rpmlint [GH-480] [GH-481]

  • New features:

    • Add null-device symbol for syntax checker commands
    • Add flycheck-display-error-messages-unless-error-list for flycheck-error-display-function
    • Add flycheck-error-list-after-refresh-hook to run after the error list refreshes
    • Add flycheck-navigation-minimum-level to restrict error levels available for navigation [GH-398] [GH-485]
    • The error list can be sorted by message and syntax checker name now [GH-500]
    • Add flycheck-error-list-checker-name face to customize the appearance of the syntax checker name in the error list [GH-500]
    • Add flycheck-shellcheck-excluded-warnings to exclude warnings from ShellCheck reports [GH-499]
    • Add flycheck-add-mode to add a new major mode to a syntax checker [GH-506]
    • Add flycheck-gcc-openmp to enable OpenMP for GCC in C/C++ [GH-507]

  • Improvements:

    • Improve GCC syntax checking by expanding templates [GH-459]
    • d-dmd reports errors with columns now [GH-460]
    • Remove Projectile-based config file search [GH-461]
    • Do not change point when navigating in the error list [GH-487]
    • ShellCheck warnings now include the corresponding warning code

  • Bug fixes:

    • Expand default-directory before using it, to handle abbreviated paths gracefully [GH-434]
    • Restore mouse support in the error list [GH-468]
    • less now correctly resolves relative paths in data-uri [GH-471]
    • go-errcheck now properly uses package names as syntax checker arguments
    • c/c++-clang now handles empty error messages [GH-497]

0.20 (Aug 12, 2014)

  • Breaking changes:

    • The internal names of syntax checker properties changed. All packages depending on Flycheck must be recompiled!
    • flycheck-substitute-argument always returns a list now
    • The special meaning of a trailing = in (option …) and (config-file …) is removed. Both arguments must now explicitly specify concat to prepend the option as string.

  • New syntax checkers:

    • C/C++ with GCC [GH-408]
    • Scala with scalastyle [GH-425]
    • Fortran with GFortran [GH-414] [GH-450]
    • Ada with GNAT [GH-414] [GH-457]

  • New features:

    • Add flycheck-clang-no-exceptions and flycheck-gcc-no-exceptions to flag exceptions as errors in C++ [GH-412]
    • Add flycheck-rust-crate-root to resolve inter-crate references in rust [GH-417]
    • Add flycheck-clang-blocks to enable the block syntax in Clang [GH-420]
    • read-flycheck-checker now accepts a default value
    • Add flycheck-status-changed-functions to react on status changes
    • Make the mode line lighter of Flycheck customizable with flycheck-mode-line
    • Add flycheck-rubylintrc to support configuration files for ruby-rubylint [GH-424]
    • Add flycheck-rust-crate-type to make the Crate type customizable [GH-446]
    • The mode line of the error list is now customizable with flycheck-error-list-mode-line [GH-454]
    • Pressing n or p in the error list now shows the error at point in a separate window [GH-452] [GH-454]
    • Pressing RET in the error list now jumps to the error at point [GH-454]
    • The error list can now be sorted by error level by clicking on the corresponding list header, or by pressing S with point on the column text [GH-454]
    • Error levels defined with flycheck-define-error-level can now have a numeric severity used for sorting [GH-454]

  • Improvements:

    • Use proper temporary files in python-flake8 [GH-421]
    • Demote errors from package-initialize in the emacs-lisp checker [GH-423]
    • flycheck-select-checker now uses the last used syntax checker as default when reading from minibuffer
    • flycheck-compile now prompts for the syntax checker to run as compile command [GH-428]
    • The rust syntax checker shows info messages now [GH-439]
    • The sass and scss syntax checkers now use a temporary directory for their cache [GH-443] [GH-454]
    • Change the default of flycheck-eslintrc to nil [GH-447]
    • Show the menu on the mode line lighter [GH-365]
    • Greatly improve Flycheck's menu
    • n and p now navigate the error list by errors, not by lines [GH-452] [GH-444]
    • c/c++-clang does not use in-place temporary files anymore [GH-456]

  • Bug fixes:

    • Properly support unload-feature now

  • Other changes:

    • Remove dependencies on f.el and s.el

0.19 (Jun 12, 2014)

  • Flycheck now has an official logo [GH-331]

  • Breaking changes:

    • The ruby-rubylint syntax checker now requires Ruby Lint 2.0 or newer. [GH-405]

  • New syntax checkers:

    • Go with errcheck [GH-393]

  • New features:

    • Add flycheck-keymap-prefix to change the prefix key for Flycheck keybindings [GH-381]
    • Make the prefix of Flycheck's temporary files customizable with flycheck-temp-prefix [GH-387]
    • Add :error-filter property for syntax checkers to apply a custom function to modify or filter errors after parsing [GH-397]
    • Add flycheck-rust-check-tests to disable syntax checking of test code in Rust [GH-406]
    • Add flycheck-cppcheck-inconclusive to enable cppcheck tests that might give false positives [GH-407]

  • Improvements:

    • Collapse redundant whitespace in messages from emacs-lisp [GH-397]
    • Dedent messages from haskell-ghc [GH-397]
    • Fold errors in included files into the error messages of the corresponding include in c/c++-clang [GH-397]
    • The ruby-rubylint syntax checker now supports ruby-lint 2.0 and newer [GH-405]

  • Bug fixes:

    • When stopping Flycheck, correctly kill running processes and cleanup their temporary files [GH-334]
    • Do not choke on files without extensions in haskell-ghc
    • Fix spurious warning when a syntax checker reports errors, but not for the file being checked [GH-391]
    • Do not signal errors in Go Mode, when go is not available

0.18 (Mar 24, 2014)

  • Breaking changes:

    • The POSIX script syntax checkers sh-bash and sh-dash were renamed to sh-posix-bash and sh-posix-dash respectively. The bash and zsh syntax checkers were renamed to sh-bash and sh-zsh respectively. Thus, all shell script syntax checkers now live in the sh- prefix.
    • rst-sphinx requires Sphinx 1.2 or newer now.
    • rustc requires Rust 0.10 (not yet released at the time of writing) or newer now [GH-353]

  • New syntax checkers:

    • Perl with Perl Critic [GH-88]
    • Replace GNU Make with POSIX Make [GH-322]
    • Shellcheck [GH-267]
    • Go with golint [GH-328]
    • Go with go tool vet [GH-329]

  • New features:

    • Add flycheck-rust-library-path to specify library locations for rust
    • Add flycheck-dmd-include-path to change the include path of d-dmd [GH-344]

  • Improvements:

    • flycheck-parse-checkstyle supports info level messages now
    • Correctly parse multiline error messages of go-build and go-test
    • rst-sphinx supports custom nodes without explicit writer support now, by using the pseudoxml builder.
    • Avoid warnings about missing main functions in rust
    • Properly resolve relative filenames in .. include:: directives in rst
    • Use --unix_mode option in javascript-gjslint to get the file name [GH-348]
    • Puppet Lint messages now include the name of the corresponding check
    • rustc supports upcoming Rust 0.10 now [GH-353]
    • Flycheck now handles Clang errors from included files [GH-367]

0.17 (Feb 1, 2014)

  • The manual was ported to Sphinx and is now located at http://flycheck.readthedocs.org [GH-274]

  • Breaking changes:

    • The default flycheck-completion-system was changed to nil, i.e. the built-in completing-read, for compliance with Emacs' defaults. To restore the previous behaviour, add (eval-after-load 'flycheck '(setq flycheck-completion-system 'ido)) to your init.el.
    • flycheck-count-errors counts errors of all levels now, and returns an alist mapping error symbols to error counts.

  • New syntax checkers:

    • RST (ReStructuredText) using Sphinx
    • GNU Make [GH-321]

  • New features:

    • Extend syntax checkers with flycheck-add-next-checkers [GH-266]

  • Improvements:

    • Immediately re-check the buffer when it was changed during a syntax check [GH-301]
    • Do not defer syntax checker after idle change timeout [GH-305]
    • Do not use the generic rst syntax checker in Sphinx projects anymore, to avoid false positives by Sphinx-only markup
    • Check for more than just syntax errors in rust [GH-314]
    • chef-foodcritic supports enh-ruby-mode now

  • Bug fixes

    • Do not attach syntax checker processes to the buffer anymore [GH-298]
    • Do not visit the file to check in emacs-lisp and emacs-lisp-checkdoc to avoid unintended side effects [GH-319]

0.16 (Jan 11, 2014)

  • Breaking changes:

    • Argument substitution is no longer performed on syntax checker executables. The executable must be a string.
    • Split out haskell-hdevtools into a separate package. See flycheck-hdevtools [GH-275]
    • Drop support for coffeelint 0.x
    • The error list is reimplemented on top of Tabulated List Mode. This greatly changes the appearance and behaviour of the error list [GH-230]

  • New syntax checkers:

    • Ruby with ruby-lint [GH-250]
    • Handlebars [GH-270]
    • YAML with yaml-jsyaml [GH-253]
    • Chef recipes with foodcritic [GH-255]
    • AsciiDoc [GH-276]
    • CFEngine [GH-271]
    • Racket [GH-277]
    • Texinfo
    • Verilog [GH-296]
    • Javascript with eslint [GH-291]
    • ERuby [GH-285]

  • New features:

    • Define variables to override the executables of syntax checkers [GH-272]
    • Interactively set the executable of a syntax checker with flycheck-set-checker-executable [GH-272]
    • Disable syntax checkers easily with flycheck-disabled-checkers [GH-269]
    • Add support for the Compass CSS framework in the sass and scss checkers, with flycheck-sass-compass and flycheck-scss-compass respectively [GH-268]
    • Disable style checks in ruby-rubocop with flycheck-rubocop-lint-only [GH-287]
    • Add support for Microsoft extensions in c/c++-clang via flycheck-clang-ms-extensions [GH-283]
    • New faces flycheck-error-list-info, flycheck-error-list-warning, flycheck-error-list-error, flycheck-error-list-line-number and flycheck-error-list-column-number [GH-230]
    • Add flycheck-ghc-no-user-package-database to disable the user package database for haskell-ghc
    • Add flycheck-ghc-package-databases to add additional package databases to haskell-ghc
    • Add flycheck-ghc-search-path to add additional directories to the search path of haskell-ghc

  • Improvements:

    • Demote Rubocop convention messages to info level
    • Stop Flycheck before the buffer is reverted [GH-282]
    • Properly resolve local module imports in haskell-ghc

  • Bug fixes:

    • Make relative imports work with python-pylint [GH-280]
    • Fix parsing of errors in scss and sass

0.15 (Nov 15, 2013)

  • Flycheck has a new home at https://github.com/flycheck/flycheck, the online manual moved to http://flycheck.github.io.

  • Breaking changes:

    • Do not add the current directory to the emacs-lisp syntax checker load path
    • flycheck-list-errors cannot list errors at point anymore. It does not accept a prefix argument anymore, and takes zero arguments now [GH-214]
    • flycheck-display-errors-in-list is gone. The error list automatically highlights the error at point now [GH-214]
    • Remove obsolete flycheck-declare-checker

  • New syntax checkers:

    • YAML [GH-236]
    • Javascript with gjslint [GH-245]
    • Slim [GH-246]
    • PHP using phpmd [GH-249]

  • New features:

    • Support IDO or Grizzl as completion systems for flycheck-select-checker at C-c ! s
    • Disable standard error navigation with flycheck-standard-error-navigation [GH-202]
    • Add flycheck-clang-language-standard to choose the language standard for C/C++ syntax checking [GH-207]
    • Add flycheck-clang-definitions to set additional definitions for C/C++ syntax checking [GH-207]
    • Add flycheck-clang-no-rtti to disable RTTI for C/C++ syntax checking [GH-207]
    • Add new option cell option-flag for boolean flags in syntax checker commands
    • Add flycheck-clang-includes to include additional files for C/C++ syntax checking [GH-207]
    • Add configuration file variable flycheck-pylintrc for Pylint
    • New faces flycheck-error-list-highlight-at-point and flycheck-error-list-highlight to highlight the errors at point and at the current line respectively in the error list [GH-214]
    • The error list now automatically updates to show the errors of the current buffer [GH-214]
    • Define new error levels with flycheck-define-error-level [GH-212]
    • Add flycheck-clang-standard-library to choose the standard library for C/C++ syntax checking [GH-234]
    • Customize the delay for displaying errors via flycheck-display-errors-delay [GH-243]
    • Add info level for informational annotations by syntax checkers [GH-215]
    • Add a new symbol temporary-file-name to pass temporary file names to syntax checkers [GH-259]

  • Improvements:

    • The error list now refreshes automatically after each syntax check [GH-214]
    • The errors at point are now automatically highlighted in the error list [GH-214]
    • emacs-lisp-checkdoc does not longer check .dir-locals.el files
    • Do not automatically check syntax in encrypted files [GH-222]
    • Parse notes from c/c++-clang into info level messages [GH-215]
    • Parse convention warnings from pylint to info level [GH-204]
    • Demote naming warnings from python-flake8 to info level [GH-215]
    • Support enh-ruby-mode in Ruby syntax checkers [GH-256]
    • Parse columns from python-pylint errors
    • Do not compress temporary files for syntax checks if the original file was compressed

  • Bug fixes:

    • Find local includes in the Clang syntax checker [GH-225]
    • Do not emit spurious flawed definition warning in the rst syntax checker
    • Handle abbreviated file names in luac output, by simply ignoring them [GH-251]
    • Correctly redirect the output binary of the go-build syntax checker [GH-259]
    • Fix Cppcheck parsing with the built-in Emacs XML parser [GH-263]

0.14.1 (Aug 16, 2013)

  • Bug fixes:

    • Add a missing dependency [GH-194]

0.14 (Aug 15, 2013)

  • Breaking changes:

    • Introduce flycheck-define-checker and obsolete flycheck-declare-checker [GH-163]
    • Remove the obsolete flycheck-error-face and flycheck-warning-face
    • Do not initialize packages by default in emacs-lisp syntax checker for non-configuration files [GH-176]
    • Change the default flycheck-highlighting-mode to symbols [GH-179]
    • Drop support for Pylint 0.x in python-pylint [GH-184]

  • New features:

    • List errors at point only with prefix arg to flycheck-list-errors [GH-166]
    • Add new display function flycheck-display-errors-in-list to display errors at point in the error list [GH-166]
    • New option-list argument cell to pass option lists to a syntax checker
    • New flycheck-emacs-lisp-load-path option to customize the load-path used by the emacs-lisp syntax checker [GH-174]
    • New flycheck-emacs-lisp-initialize-packages option to initialize packages in the emacs-lisp syntax checker [GH-176]
    • New flycheck-emacs-lisp-package-user-dir option to configure the package directory for the emacs-lisp syntax checker [GH-176]
    • New option filter flycheck-option-comma-separated-list for options with comma separated lists as values
    • New highlighting mode symbols to highlight the symbol pointed to by an error [GH-179]

  • New syntax checkers:

    • LESS [GH-160]
    • Haskell with ghc, hdevtools and hlint [GH-162]
    • C/C++ with cppcheck [GH-170]
    • C/C++ with clang [GH-172]
    • CoffeeScript with coffee
    • XML with xmllint [GH-180]
    • D with dmd [GH-167]

  • Improvements:

    • Support Web Mode in html-tidy syntax checker [GH-157]
    • Support Rubocop 0.9 and drop support for older Rubocop releases [GH-159]
    • Include the message ID in error messages from python-pylint

  • Bug fixes:

    • Fix warnings about flawed definitions in emacs-lisp and emacs-lisp-checkdoc, caused by faulty formatting of sexps
    • Refresh error lists when pressing g [GH-166]
    • Do not obscure active minibuffer input when displaying errors in the echo area [GH-175]
    • Fix universal prefix argument for flycheck-next-error at C-c ! n
    • Correctly parse output of coffeelint 0.5.7 [GH-192]
    • Correctly parse output of pylint 1.0 [GH-184]

0.13 (Jun 28, 2013)

  • Breaking changes:

    • Obsolete flycheck-warning-face and flycheck-error-face in favor flycheck-warning and flycheck-error respectively
    • Obsolete :predicate forms in favor of :predicate functions
    • flycheck-def-config-file-var does not automatically mark variables as safe anymore

  • New features:

    • Make fringe indicator faces customizable independently with flycheck-fringe-error and flycheck-fringe-warning
    • Improve the default faces by using underlines instead of foreground colors, if possible
    • Customizable error processing with flycheck-process-error-functions [GH-141]
    • Make the delay before starting a syntax check customizable via flycheck-idle-change-delay [GH-144]
    • Make display of errors under point customizable via flycheck-display-errors-function [GH-156]

  • Improvements

    • Always highlight errors on top of warnings now
    • Do not trigger syntax checks in the middle of commands [GH-141]
    • Add the current directory to load path in the emacs-lisp syntax checker
    • Do not longer use the emacs-lisp-checkdoc syntax checker in Scratch buffers
    • Do not flush temporary files onto disk [GH-149]
    • Syntax checkers may have error patterns and error parser now
    • Predicate forms are now wrapped into functions and compiled into functions during byte compilation
    • Copy each message separately in flycheck-copy-messages-as-kill
    • Mark some customizable variables as safe for file variable usage, most notably flycheck-indication-mode, flycheck-highlighting-mode and flycheck-idle-change-delay.

  • Bug fixes:

    • Fix error when searching for a configuration file outside a Projectile project
    • Do not start a syntax check before the flycheck-mode-hook was run
    • Do not start automatic syntax checks if Flycheck Mode is disabled
    • Defer the initial syntax check until after the current interactive command [GH-143]
    • Correctly clean up information about running processes
    • Fix compatibility with Emacs 24.2 and earlier [GH-150]
    • Fix version information on Emacs trunk builds

0.12 (May 18, 2013)

  • New syntax checkers:

    • Ruby using jruby [GH-136]
    • Puppet [GH-138]

  • New features:

    • Highlight error expressions by default, with the new sexps highlighting mode
    • Automatically check syntax some time after the last change in the buffer [GH-140]
    • Add flycheck-version to determine the installed Flycheck version
    • Add flycheck-list-errors, mapped to C-c ! l, to list all errors in a separate buffer

  • Improvements:

    • Defer syntax checks while a buffer is reverted, to avoid race conditions

  • Bug fixes:

    • Correctly parse syntax errors from JRuby [GH-136]

0.11 (May 01, 2013)

  • New syntax checkers:

    • Scala [GH-124]

  • New features:

    • Customizable error indication with control of the fringe side, via flycheck-indication-mode
    • Customizable automatic syntax checking, via flycheck-check-syntax-automatically [GH-128]
    • Customizable configuration file search, via flycheck-locate-config-file-functions [GH-133]
    • Find configuration files in Projectile projects
    • Add flycheck-before-syntax-check-hook and flycheck-syntax-check-failed-hook

  • Improvements:

    • The ruby syntax checker now differentiates warnings from errors [GH-123]
    • Faces are now in a separate customization group

  • Bug fixes:

    • Add missing customization group for syntax checker options

0.10 (Apr 21, 2013)

  • Flycheck uses cl-lib now. This library is built-in as of GNU Emacs 24.3. For earlier releases of GNU Emacs 24 an additional compatibility library will be installed from GNU ELPA.

  • New syntax checkers:

    • POSIX Shell script using bash [GH-112]
    • Ruby using rubocop [GH-113]
    • Elixir [GH-108]
    • Erlang [GH-122]

  • Removed syntax checkers:

    • Python using Pyflakes. Use the superior Flake8 syntax checker [GH-115]

  • New features:

    • Add flycheck-copy-messages-as-kill, mapped to C-c ! C-w, to copy all error messages under point into kill ring
    • Add flycheck-google-messages, mapped to C-c ! /, to google for error messages under point. Needs the Google This library
    • Syntax checkers can redirect output to a temporary directory now using the temporary-directory argument symbol

  • Improvements:

    • Call option filters for nil values, too
    • Improve error parsing in Bash syntax checker [GH-112]
    • Error navigation does not cross restrictions in narrowed buffers anymore
    • Try to preserve the non-directory part of the buffer's file name when substituting the source symbol [GH-99]

  • Bug fixes:

    • Fix error highlighting and navigation in narrowed buffers
    • Use a hopefully more reliable way to parse output of PHP CodeSniffer [GH-118]

0.9 (Apr 13, 2013)

  • New syntax checkers:

    • SCSS using scss [GH-103]
    • RST (ReStructuredText) using Docutils
    • Go using go build and go test [GH-107]

  • Improvements:

    • Quit the error message window when navigating away from error locations

0.8 (Apr 9, 2013)

  • New syntax checkers:

    • Go using gofmt [GH-91]
    • Rust using rustc [GH-101]

  • New features:

    • Add a global Flycheck mode. (global-flycheck-mode) is now the recommended way to enable Flycheck [GH-29]
    • Add support for syntax checker options [GH-72]
    • Add option for the coding standard used by the php-phpcs syntax checker
    • Add options for the maximum McCabe complexity and the maximum line length to python-flake8

  • Improvements:

    • Support McCabe warnings in python-flake8
    • Support warnings from flake8 2
    • Show long error messages in a popup buffer [GH-94]
    • Show all error messages at point [GH-96]
    • Add support for naming warings from flake8 2 [GH-98]
    • Flycheck mode is not longer enabled for buffers whose names start with a space
    • Improve highlighting to reduce screen flickering [GH-100]

0.7.1 (Feb 23, 2013)

  • Bug fixes:

    • Do not signal errors from flycheck-mode [GH-87]
    • Correctly fall back to $HOME when searching configuration files
    • Correctly ascend to parent directory when searching configuration files

  • API changes:

    • Rename config cell to config-file
    • Allow to pass the result of config-file cells as single argument
    • Add support for evaluating Lisp forms in syntax checker commands [GH-86]

0.7 (Feb 14, 2013)

  • New features:

    • Navigate to source of syntax checker declarations from syntax checker help
    • Add online Info manual [GH-60]

  • Improvements:

    • Use pipes instead of TTYs to read output from syntax checkers
    • Defer syntax checks for invisible buffers [GH-80]
    • Immediately display error messages after error navigation [GH-62]

  • Bug fixes:

    • Never select deleted buffers
    • Do not let the debugger interfere with necessary cleanup actions
    • Do not attempt to parse empty XML trees [GH-78]
    • Fix infinite recursion on Windows [GH-81]

0.6.1 (Jan 30, 2013)

  • Fix package dependencies

0.6 (Jan 29, 2013)

  • New syntax checkers:

    • Emacs Lisp with checkdoc-current-buffer [GH-53]
    • PHP with PHP CodeSniffer [GH-72]

  • Removed syntax checkers:

    • Javascript with jsl

  • New features:

    • Error navigation with next-error and previous-error [GH-26]
    • Fringe icons instead of error indicators [GH-33]
    • Menu entry for Flycheck [GH-59]
    • Customizable error highlighting, taking the column number into account [GH-35]
    • Configuration files for syntax checkers
    • Add configuration file support to the syntax checkers coffee-coffeelint, html-tidy, javascript-jshint, pyton-flake8 and tex-chktex
    • Allow to compile a buffer with a syntax checker for testing purposes [GH-58]
    • Use multiple syntax checkers during a syntax check [GH-31]
    • Add dedicated help for syntax checkers [GH-52]

  • Improvements:

    • Match error patterns in order of declaration [GH-55]

  • Bug fixes:

    • Inherit highlighting faces from built-in faces [GH-24]
    • Correct error patterns of the HTML syntax checker [GH-36]
    • Detect syntax errors in the python-flake8 syntax checker [GH-42]
    • Fix various regressions after introducing unit tests
    • Inhibit syntax checking during package installation [GH-45]
    • Disable syntax checking in Tramp buffers [GH-54]
    • Preserve whitespace in error messages [GH-65]

  • API changes:

    • Replace syntax checker variables with syntax checker declarations [GH-41]
    • Support parsing errors with arbitrary functions instead of error patterns [GH-38]
    • Add an error parser for Checkstyle-like XML output [GH-38]

0.5 (Dec 28, 2012)

  • New syntax checkers:

    • SASS [GH-15]
    • Perl [GH-21]
    • XML
    • Lua [GH-30]

  • New features:

    • Support manual buffer-local selection of syntax checker [GH-25]
    • Add customizable error indicators [GH-28]
    • Echo error messages at point without 3rd-party libraries like flymake-cursor [GH-27]

  • Improvements:

    • Remember the last automatically selected syntax checker [GH-24]

  • Bug fixes:

    • Fix syntax checking of buffers without backing files [GH-19]

  • API changes:

    • Replace underlying Flymake API with a custom syntax checking implementation [GH-15]

0.4 (Nov 21, t2012)

  • Rename the project to Flycheck [GH-5]

  • New syntax checkers

    • HAML [GH-9]
    • CSS [GH-9]
    • Javascript with jsl [GH-9]
    • Javascript with jshint [GH-16]
    • JSON [GH-12]
    • LaTeX with lacheck

  • Bug fixes:

    • Fix type error when checking compressed Emacs Lisp [GH-10]

0.3 (Nov 21, 2012)

  • Replace flymake-mode with a custom syntax checking minor mode [GH-4]

0.2 (Oct 25, 2012)

  • New syntax checkers:

    • PHP

  • API changes:

    • Simplify syntax checker declarations [GH-2]

0.1 (Oct 11, 2012)

Initial release as flymake-checkers

  • New syntax checkers:

    • TeX/LaTeX
    • Shell scripts
    • Python
    • Ruby
    • Coffeescript
    • Emacs Lisp