Changes¶

master (unreleased)¶

38.3 (2026-07-29)¶

New Features¶

#2230: Explain more checkers’ diagnostics with C-c ! e (flycheck-explain-error-at-point): dockerfile-hadolint, go-staticcheck, python-mypy, ruby-rubocop/ruby-standard, and the less/scss/sass stylelint checkers. Checker authors can now define a URL-based explainer in one line with the new flycheck-error-explainer-from-url helper.

Bugs fixed¶

#2229: Keep flycheck-annotate-mode’s inline messages on the right line while editing - an edit that left point on its line (such as open-line) could strand an annotation on the wrong line until the next check.

38.2 (2026-07-29)¶

Bugs fixed¶

#2228: Rename the native LSP checker from lsp to flycheck-lsp, so it no longer clobbers the lsp checker lsp-mode registers for its own Flycheck integration - which had left lsp-mode users with an empty error list and no highlighting (#2226).

38.1 (2026-07-29)¶

Bugs fixed¶

#2227: Fix flycheck-annotate-mode drawing the cursor past the inline annotation, so the line at point read as if the cursor were inside the message (most visibly with the multi-line below style) and editing the line was awkward.

38.0 (2026-07-29)¶

New Features¶

#2202: Add flycheck-annotate-mode, which shows error messages inline next to the code they refer to, in the spirit of VS Code’s Error Lens and the inline diagnostics of Neovim, Helix and Zed. Two styles ship out of the box: eol appends a compact message after the line, below lays the full messages out underneath. Obsoletes the third-party flycheck-inline package.
#2203: flycheck-annotate-mode can tint each error’s whole line with a subtle background in its severity colour (flycheck-annotate-background).
#2204: Add a sideline annotation style that flushes the compact message to the window’s right edge, in the manner of lsp-ui-sideline.
#2205: Align below-style connectors to the error’s real display column, so they line up under tab-indented code and past a line-number gutter.
#2206: Filter inline annotations per tier via flycheck-annotate-current-line-levels and flycheck-annotate-other-lines-levels, so the focused line and the rest can show different levels.
#2225: Add global-flycheck-annotate-mode to turn inline diagnostics on in every buffer Flycheck checks.
#2193: Add a quick-fix API. C-c ! f (flycheck-fix-error-at-point) and x in the error list apply a checker’s machine-applicable fix, attached to a flycheck-error via the new :fix slot. Wired into javascript-eslint, the Rust checkers and SARIF-based checkers, whose fixes were previously parsed and discarded.
#2195: python-ruff and sh-shellcheck now carry the fixes their tools suggest (shellcheck 0.7 or newer required).
#2207: C-c ! F (flycheck-fix-all-errors) applies every fix in the buffer at once as a single undoable change; X does the same from the error list.
#2208: Mark a fixable error’s line with a distinct fringe or margin indicator, like an editor’s “fix available” lightbulb (flycheck-fixable-indicator).
#2210: A :fix may be a function that computes the fix on demand, so expensive fixes (such as an LSP code action) cost nothing until applied.
#2209: Integrate with Eglot out of the box: global-flycheck-eglot-mode reports an Eglot-managed server’s diagnostics through Flycheck via the new eglot-check checker. Obsoletes the third-party flycheck-eglot package, whose mode names it reuses - uninstall that package first, or the two will clash.
#2211: Offer an Eglot diagnostic’s quickfix code action as a Flycheck fix, fetched from the server only when you apply it (flycheck-eglot-code-actions).
#2213: Add a native lsp checker that talks to a diagnostics language server directly over the built-in jsonrpc library, without Eglot or lsp-mode. Enable global-flycheck-lsp-mode and configure a server per major mode in flycheck-lsp-servers.
#2214: Ship built-in flycheck-lsp-servers entries for RuboCop, Ruff, Biome and Harper, each used only when its program is installed.
#2215: Offer the server’s quickfix code actions as fixes (flycheck-lsp-code-actions), and run the initialize handshake asynchronously so starting a server no longer briefly blocks Emacs.
#2218: Read RuboCop’s and standardrb’s autocorrects, which those servers ship inline in each diagnostic’s data, as fixes.
#2192: Show whole-project diagnostics: P (flycheck-error-list-toggle-scope) aggregates errors across every open Flycheck buffer together with the cross-file errors that checkers like tsc, cargo check and mypy report but the per-buffer view drops.
#2196: Group the error list by file (M-2), checker (M-3) or level (M-4), nest and combine the dimensions, collapse a group with TAB, and drive it all from a strip at the top with the mouse.
#2212: Errors can carry secondary source locations (from an LSP diagnostic’s relatedInformation, which Flymake discards). Visit them with C-c ! j; they show up inline and are badged ↳N in the error list.
#2191: Run syntax checkers over TRAMP: a remote buffer is checked on the remote host, where before it could not run (executables must be installed there). See flycheck-check-syntax-automatically-remote.

Bugs fixed¶

#2217: Fix a code-action fix returned as a legacy changes WorkspaceEdit (as Ruff emits) silently doing nothing; affects the lsp checker and the Eglot bridge.
#2197: Stop scanning every error-list row on cursor movement, so keeping a large project-scope list open is much cheaper.

37.0 (2026-07-18)¶

New Features¶

A new syntax check now interrupts a still-running one instead of waiting for it to finish and showing stale results, so slow checkers (cargo, mypy) feel much more responsive. flycheck-interrupt-running-checks controls this (default 10: only checks younger than ten seconds are interrupted).
Filter the error list by syntax checker (c) and by a regexp on the message or ID (/), on top of the minimum-level filter (f); F resets all filters.
The error counts in the mode line are clickable: mouse-1 pops up the error list.
Add flycheck-parse-sarif, a ready-made :error-parser for the SARIF output format that many analyzers can emit. A zero-width SARIF region is treated as spanning the whole line.
Add asciidoc-mode support to the asciidoctor and textlint checkers.
Add neocaml-opam-mode support to the opam checker.
#1787: Add the :handle-suspicious command-checker property, letting a checker turn a suspicious state (a non-zero exit with no parsable errors) into regular errors instead of the generic warning.

Bugs fixed¶

#1129: javascript-eslint no longer makes a blocking --print-config probe before the first check in every buffer (which used to freeze Emacs); a fatal eslint failure is diagnosed from the check’s exit status and disables the checker with an echo-area notice. Checker authors can return disable or (disable . reason) from :handle-suspicious.
#1946: Fix flycheck-lintr-linters being ignored by recent lintr versions, which require linters to be passed as a named argument.
#2159: Mitigate CVE-2024-53920 in the emacs-lisp checker by requiring files to be trusted (via trusted-content) on Emacs 30+; emacs-lisp-checkdoc stays enabled.
#2161: Fix the org-lint checker erroring out on Emacs 31, where org-lint reports line numbers as strings.
#2163: Disable native compilation in the emacs-lisp checker subprocess so it no longer writes stray .eln files to the native-comp cache.
#2164: Recognize unresolved-identifier errors in the scheme-chicken checker.
#2166: Fix awk-gawk reporting a suspicious checker state for valid scripts.
#2169: Parse the severity-tagged output format introduced by Ruff 0.15.7 (e.g. error[F401] instead of F401).
#2170: Force English checker output with LC_MESSAGES=C instead of LC_ALL=C, which broke checkers reading UTF-8 input, such as hledger.
#2174: Fix the haskell-ghc and haskell-stack-ghc checkers passing a broken -x flag in haskell-ts-mode.
#2175: Compose the error indicator with pre-existing wrap-prefix text properties (e.g. from visual-wrap-prefix-mode).
#2177: Avoid \N{...} character escapes, which break native compilation on Emacs 32.

Changes¶

(Breaking) Drop support for Emacs 27; Flycheck now requires Emacs 28.1 or newer.
The error list pops up in a bottom side window by default (flycheck-error-list-display-buffer-action); dismiss it with q.
The File and ID columns of the error list size to their contents instead of truncating at fixed widths.
Document errors at point through Eldoc by default, composing with other Eldoc sources (e.g. Eglot); restore the old behaviour via flycheck-display-errors-function.
Checkers exceeding flycheck-checker-error-threshold are no longer silently disabled; Flycheck shows the most severe errors up to the threshold and flags the truncation in the mode line and error list. Set flycheck-checker-error-threshold-action to disable for the old behaviour.
flycheck-indication-mode defaults to auto (left fringe on graphical displays, left margin on terminals), and widens the margin when needed instead of silently showing nothing.
flycheck-verify-setup and flycheck-verify-checker now ask before saving a modified buffer instead of saving it silently.
dockerfile-hadolint now parses hadolint’s SARIF output (--format sarif) via flycheck-parse-sarif, so it no longer breaks when hadolint tweaks its human-readable format.

36.0 (2026-02-19)¶

New Features¶

#2047: Add javascript-oxlint checker for JavaScript and TypeScript using oxlint.
#1757: Add org-lint checker for Org mode files. The checker uses Emacs’ built-in org-lint command to detect issues such as invalid links, dead links, and duplicate IDs.
#2132: Add the flycheck-shellcheck-infer-shell option to the sh-shellcheck checker.
#1977: Add flycheck-shellcheck-args for passing extra command-line arguments to ShellCheck.
#1854: Add flycheck-shellcheck-enabled-checks option to enable optional ShellCheck checks via the --enable flag.
#2139: Add compatibility with Proselint 0.16.
#1574: Enable proselint checker for reStructuredText mode and chain it after the rst and rst-sphinx checkers.
#1874: Add flycheck-error-list-after-jump-hook, run after jumping from the error list to an error location.
#2137: Allow flycheck-command-map to be used as a prefix command with keymap-set and similar functions.
#1833: Automatically re-check the buffer after revert-buffer (e.g. when using global-auto-revert-mode).
#1134: Add error explainer for the python-ruff checker.
#1979: Show pyright rule names (e.g. reportGeneralTypeIssues) as error IDs.
#2134: Include info-level errors in the mode-line indicator (format: errors|warnings|infos).

Bugs fixed¶

#2131: Mitigate CVE-2024-53920 in the emacs-lisp checker subprocess by disabling local eval directives and restricting local variables to safe values during byte-compilation.
#2144: Rewrite org-lint checker to run in the current Emacs process instead of a -Q --batch subprocess. This eliminates false “Unknown source block language” warnings for languages from external packages.
#2043: Fix rust checker temp directory error by using --emit=metadata --out-dir instead of --emit=mir -o /dev/null. Also fixes the checker on Windows where /dev/null does not exist.
#1859: Force C locale (LC_ALL=C) for checker processes to ensure English output. Fixes error pattern matching in non-English locales.
#1919: Isolate bidi characters in error message snippets using Unicode directional isolates to prevent formatting corruption.
#1856: Strictly enforce flycheck-navigation-minimum-level. Previously, setting the minimum level would still navigate to lower-severity errors when no errors at the minimum level existed.
#1918: Exclude the *Flycheck error messages* buffer from global-flycheck-mode.
#1908: Increase error list File column width from 6 to 12 characters.
#1882: Fix Go build tags to use comma-separated format instead of repeated -tags flags.
#2098: Fix tex-chktex error parsing with --inputfiles.
#2143: Fix compilation warnings on Emacs 30 (obsolete rx-constituents and missing defcustom type spec).
#2089: Make flycheck-protoc-import-path buffer-local so different protobuf projects can have different import paths.
#2032: Guard Tools menu operations for Emacs configurations that remove the Tools menu (e.g. Doom Emacs).
#1805: Preserve match data in idle trigger timer handler.
#1170: Skip error list highlighting when the error list buffer is not visible, improving performance on every post-command-hook.
#1153: Handle puppet-parser errors without line numbers (e.g. “Syntax error at end of file”).
#1886: Fix continuation indicator appearing on non-wrapped lines by using wrap-prefix instead of line-prefix.
#2062: Fall back to python executable when python3 is unavailable (e.g. Windows with Anaconda/Miniforge).
#2127: Preserve pre-existing line-prefix text properties (e.g. from org-indent-mode) when adding flycheck overlays.
#2086: Fix the name of the PyMarkdown config.
#2036: Fix awk-gawk checker passing spurious quotes to gawk --source.
#2092: Detect parse errors (unbalanced parentheses, invalid read syntax) in emacs-lisp byte compilation.
#2090: Fix python-ruff checker to use concise output format instead of removed text format (renamed in ruff 0.2).
Fix python-ruff error ID regex and invalid-syntax error handling.
Fix rpm-rpmlint error filter returning unfiltered errors (the (none) filename filter was not applied).
Add php-ts-mode to the php-phpcs-changed checker.
#1926: Fix flycheck-cuda-gencodes customize type (was file, now string).
Guard buffer-file-name against nil in yaml-actionlint predicate, erlang enabled check, and flycheck-rebar3-project-root.
Fix python-pycompile to verify python3 actually works instead of just checking it exists.
Fix proselint version detection breaking checker validation.

Removed¶

Remove typescript-tslint checker. TSLint has been deprecated since 2019 in favor of ESLint with typescript-eslint.
Remove sass and scss checkers. Ruby Sass reached end-of-life in March 2019. Use sass-stylelint and scss-stylelint instead.
Remove sass/scss-sass-lint checker. sass-lint has been abandoned for over 4 years. Use sass-stylelint or scss-stylelint instead.
Remove scss-lint checker. scss-lint depends on the dead Ruby Sass engine and is no longer maintained. Use scss-stylelint instead.
Remove eruby-erubis and eruby-ruumba checkers. Erubis has been abandoned since 2011 and Ruumba since 2020. ERuby support is removed.
Remove css-csslint checker. CSSLint has been abandoned since ~2017. Use css-stylelint instead.
Remove protobuf-prototool checker. Prototool was archived by Uber in March 2022.
Remove nix-linter checker. nix-linter has been abandoned by its author, who recommends statix instead.
Remove coffee-coffeelint checker. CoffeeLint has been effectively inactive with known security vulnerabilities.
Remove asciidoc checker. The legacy Python AsciiDoc processor is superseded by Asciidoctor. Use asciidoctor instead.
Remove json-jsonlint checker. The original jsonlint has been abandoned since ~2017. Use json-python-json or json-jq instead.
Remove xml-xmlstarlet checker. XMLStarlet has not had a release since 2014. Use xml-xmllint instead.
Remove javascript-jshint checker. JSHint has been largely superseded by ESLint. Use javascript-eslint instead.
Remove yaml-ruby checker. Ruby’s YAML parser provides the same functionality as js-yaml. Use yaml-jsyaml or yaml-yamllint instead.
Remove ruby-jruby checker. JRuby is extremely niche for linting. Use ruby-rubocop or ruby instead.

Changes¶

Remove dead code: flycheck-option-symbol, flycheck-flake8--find-project-root, flycheck-string-or-nil-p, flycheck-chunked-process-input and associated chunking functions.
Replace deprecated seq-contains with seq-contains-p.
Replace flycheck-string-or-nil-p with built-in string-or-null-p.
Use json-parse-buffer unconditionally (available since Emacs 27.1), removing the json-read fallback and the json library dependency.
Use libxml-available-p (available since Emacs 27.1) instead of fboundp check.
Use seq-sort-by (available since Emacs 27.1) instead of workaround.
Use seq-mapcat instead of (apply #'append (seq-map ...)).
Minor code style improvements: when (not ...) → unless, reverse → nreverse for locally-built lists.
#2152: Point package URL header to GitHub repository instead of the website.

35.0 (2025-04-23)¶

New Features¶

#2105: Add options for configuring the jsonnet checker.
#1975: Add support for --expt-relaxed-constexpr flag to cuda checker.
#2055: Add support for --expt-extended-lambda flag to cuda checker.
#1987: Add a flag flycheck-auto-display-errors-after-checking control whether to display errors automatically after checking.
#2035: Add colors to FlyC mode line and update mode line menu. Introduce flycheck-mode-success-indicator.
#2059: Enable checkers for new AUCTeX 14 modes.
#2070: Add a new syntax checker r for R with the builtin parse function.
#2073: Add new syntax checker salt-lint for the salt infrastructure-as-code language.
#2071: Add a new checker perl-perlimports, for cleaning up Perl import statements.
#1972: New defcustom flycheck-clear-displayed-errors-function to customize how error messages are to be cleared.
#2075: Add the flycheck-chktex-extra-flags option to the tex-chktex checker.
#2107: Add -Xcompiler option for cuda-nvcc.
Add new markdownlint-cli2 checker.

Bugs fixed¶

#2057: Revert the replacement of flycheck-version with lm-version.
#1972: Refine flycheck-display-errors lifecycle so error messages can be cleared.
#2067: Handle correctly GHC 9.6 error output format.
#2079: Fix ruff error-patterns and error-filter.

Changes¶

(Breaking) #2066: Remove support for versions of stylelint older than v14.
Update error-patterns for ghdl 4.1.0.
#2078: ruff: --output-format=text replaced with --output-format=concise due to upstream changes in ruff.

34.1 (2024-02-18)¶

Bugs fixed¶

#2054: Remove explicit dep on the built-in package seq.el.

34.0 (2024-02-14)¶

New Features¶

New syntax checkers
- #2015: PHP with phpcs-changed
- #2017: HAML with haml-lint
- #2030: Add yaml-actionlint checker for GitHub yaml action workflows.
- #2052: Sass with Stylelint
- #2013: Nix with statix
- #1935: Chef (Ruby) with cookstyle
- #1915: Markdown with pymarkdown
#1873: Add error explainer to perl-perlcritic.
#1875: Add error-explainer to css-stylelint.
#1876: Add error-explainer for markdownlint checker.
#2019: Add support for RELAX NG schema in xmllint.

Bugs Fixed¶

#1793: Fix flycheck-ruby-rubocop on buffers with no backing file.

Changes¶

#2026: Update the possible locations for yamllint’s configuration file.
(Breaking) #1697: Remove the coq checker.
(Breaking) #1935: Remove the chef-foodcritic checker. (it’s now replaced by ruby-chef-cookstyle)
(Breaking) #2018: Remove the golint checker.
(Breaking) Remove the ruby-rubylint checker.
#1704: The tslint checker is deprecated; it will go away in a future release.

33.1 (2024-02-04)¶

Bugs Fixed
- Fixed an usage of the removed flycheck--format-message function.

33.0 (2024-02-04)¶

Note: The changelog for this release is incomplete.

New features and improvements
- The flycheck-verify-setup UI now includes buttons to re-enable manually disabled checkers and to try to re-enable automatically disabled checkers (command checkers are automatically disabled when their executable cannot be found). #1755
- Error explainers can now return URLs (to show a webpage) or functions (to use custom formatting). For example, the Rust checker now renders explanations using markdown-view-mode. #1753
- Enable checkers in many newer TreeSitter-based major modes (think *-ts-mode).
New syntax checkers
- Python with ruff. #2033
Breaking changes
- Drop support for Emacs 25.
- The variable flycheck-current-errors now contains errors in the order in which they were returned by checkers. In previous versions of Flycheck, this list was sorted by error position and severity. #1749

32 (frozen on May 3rd, 2020, released Mar 28, 2022)¶

Highlights
- Many checkers and compiler, such as ocaml, rust, eslint, and others, include end-line and end-column information. Flycheck can now highlight the exact region that they report. Authors of checker definitions can use the new :end-line and :end-column arguments in flycheck-error-new, or the new end-line and end-column fields in error patterns. #1400
- Errors that checkers return for other files will now be displayed on the first line of the current buffer instead of begin discarded. The error list indicates which file each error came from, and navigation moves automatically moves between files. This change helps with compiled languages, where an error in another file may cause the current file to be considered invalid. Variables flycheck-relevant-error-other-file-show and flycheck-relevant-error-other-file-minimum-level control this behavior. #1427
- Flycheck can now draw error indicators in margins in addition to fringes. Margins can contain arbitrary characters and images, not just monochrome bitmaps, allowing for a better experience on high-DPI screens. flycheck-indication-mode controls this behavior, and flycheck-set-indication-mode can be used to automatically adjust the fringes and margins. Additionally, Flycheck’s will now use high-resolution fringe bitmaps if the fringe is wide enough [GH-1742, GH-1744]
- Error highlighting is now configurable, using the new flycheck-highlighting-style variable: instead of applying level-dependent faces (typically with wavy underlines), Flycheck can now insert delimiters around errors, or mix styles depending on how many lines an error covers. Additionally, stipples are added in the fringes to indicate errors that span multiple lines. #1743
New features and improvements
- Flycheck can now trigger a syntax check automatically after switching buffers, using the idle-buffer-switch option in flycheck-check-syntax-automatically. This is useful when errors in a file are due to problems in a separate file. Variables flycheck-idle-buffer-switch-delay and flycheck-buffer-switch-check-intermediate-buffers control the functionality. #1297
- Flycheck will now use Emacs’ native XML parsing when libXML fails. This behavior can be changed by customizing flycheck-xml-parser. #1349
- flycheck-verify-setup now shows more clearly which checkers will run in the buffer, and which are misconfigured. #1478
- Flycheck now locates checker executables using a customizable function, flycheck-executable-find. The default value of this function allows relative paths (set e.g. in file or dir-local variables) in addition to absolute paths and executable names. #1485
- Checkers that report error positions as a single offset from the start of the file can use the new flycheck-error-new-at-pos constructor instead of converting that position to a line and a column. #1400
- Config-file variables can now be set to a list of file names. This is useful for checkers like mypy which don’t run correctly when called from a subdirectory without passing an explicit config file. #1711
- Thanks to algorithmic improvements in error reporting, Flycheck is now much faster in large buffers. #1750
New syntax checkers:
- Awk with gawk #1708
- Bazel with buildifier #1613
- CUDA with cuda-nvcc #1508
- CWL with schema-salad-tool #1361
- Elixir with credo #1062
- JSON with json-jq #1568
- Jsonnet with jsonnet #1345
- MarkdownLint CLI with markdownlint #1366
- mypy with python-mypy #1354
- Nix with nix-linter #1530
- Opam with opam lint #1532
- protobuf-prototool with prototool #1591
- Rust with rust-clippy #1385
- Ruumba with eruby-ruumba #1616
- Staticcheck with go-staticcheck #1541
- terraform with terraform fmt, tflint #1586
- Tcl with nagelfar #1365
- Text prose with textlint #1534
- VHDL with ghdl #1160
Checker improvements:
- python-pylint and python-flake8 are now invoked with python -c, to make it easier to change between Python 2 and Python 3. #1113
- Add flycheck-perl-module-list to use specified modules when syntax checking code with the perl checker. #1207
- rust-cargo now uses cargo check and cargo test. #1289
- Add flycheck-ghc-stack-project-file for the haskell-stack-ghc checker. #1316
- Add flycheck-cppcheck-suppressions-file to pass a suppressions file to cppcheck. #1329
- Add --force-exclusion flag to rubocop command. #1348
- Flycheck now uses ESLint’s JSON output instead of checkstyle XML. #1350
- Add flycheck-eslint-args to pass arguments to javascript-eslint. #1360
- Flycheck will now execute rubocop from the directory where a Gemfile is located. If a Gemfile does not exist, the old behaviour of running the command from the directory where .rubocop.yml is found will be used. #1368
- Add flycheck-sh-bash-args to pass arguments to sh-bash. #1439
- haskell-stack-ghc will not try to install GHC anymore. #1443
- Add flycheck-ghdl-ieee-library to select which standard IEEE library to use for ghdl. #1547
- The javascript-eslint checker now supports typescript-mode by default.
- Add flycheck-erlang-rebar3-profile to select which profile to use when compiling erlang with rebar3. #1560
- Add flycheck-relevant-error-other-file-show to avoid showing errors from other files. #1579
- The nix-linter checker now has an error explainer. #1586
- The Emacs Lisp checker can now run in buffers not backed by files. #1695
Breaking changes
- Remove the javascript-jscs checker. #1024
- Remove the elixir-dogma checker. #1450
- rust-cargo now requires Rust 1.17 or newer. #1289
- rust now requires 1.18 or newer. #1501
- Rename flycheck-cargo-rustc-args to flycheck-cargo-check-args. #1289
- rust-cargo does not use the variable flycheck-rust-args anymore. #1289
- Improve detection of default directory for haskell-ghc to consider hpack project files. #1435
- Replace go tool vet with go vet. #1548
- Remove the deprecated go-megacheck checker, which is replaced by go-staticcheck. #1583

31 (Oct 07, 2017)¶

Breaking changes
- rust-cargo now requires Rust 1.15 or newer #1201
- Remove javascript-gjslint checker
New syntax checkers:
- Protobuf with protoc #1125
- systemd-analyze with systemd-analyze #1135
- Nix with nix-instantiate #1164
- Dockerfile with hadolint #1194
- AsciiDoc with asciidoctor #1167
- CSS/SCSS/LESS with stylelint #903
- Ruby with reek #1244
- Go with megacheck #1290
- LLVM IR with llc #1302
- Text prose with proselint #1304
New features:
- Add flycheck-xml-xmlstarlet-xsd-path and flycheck-xml-xmllint-xsd-path to specify an XSD schema to validate XML documents against #1272
- Add flycheck-tslint-args to pass additional arguments to tslint #1186
- Add an error explainer to the rpm-rpmlint checker using rpmlint -I #1235
- Add flycheck-emacs-lisp-check-declare to check function declaration in the emacs-lisp checker #1286
- Add flycheck-shellcheck-follow-sources to check included files when using the sh-shellcheck checker #1256
Improvements:
- Use option flycheck-go-build-tags for go-test, go-vet and go-errcheck as well.
- Add a revert function to flycheck-verify-setup, so hitting g reloads the buffer.
- Make sure the erlang compiler is only run on compilable files.
- flycheck-tslint does not crash any more on deprecation notices #1174
- rust-cargo now checks integration tests, examples and benchmarks #1206
- rust-cargo does not use flycheck-rust-library-path anymore, as dependencies are taken care of by Cargo #1206
- c/c++-gcc checker now works from GCC 4.4 and up #1226

30 (Oct 12, 2016)¶

Breaking changes
- Flycheck now requires flake8 3.0 or newer
- Remove --config option in lua-luacheck in favour of luacheck’s own .luacheckrc detection. Therefore flycheck-luacheckrc is no longer used #1057
- :modes is now mandatory for syntax checker definitions #1071
- Remove jade checker #951 #1084
- Remove javascript-eslintrc and instead rely on eslint’s own configuration file search #1085
- C-c ! e explains errors now #1122
New syntax checkers:
- Elixir with dogma #969
- sass and scss with sass-lint #1070
- Pug #951 #1084
New features:
- Add flycheck-cargo-rustc-args to pass multiple arguments to cargo rustc subcommand #1079
- Add :error-explainer to flycheck-define-checker and flycheck-explain-error-at-point to display explanations of errors #1122
- Add an error explainer to the rust and rust-cargo checkers using rustc --explain #1122
- Add :enabled property to flycheck-define-checker #1089
Improvements:
- Do not use javascript-eslint if eslint cannot find a valid configuration #1085
- Automatically disable syntax checkers which are not installed instead of checking executable before each syntax check #1116
- Add patterns for syntax errors to scheme-chicken #1123

29 (Aug 28, 2016)¶

Breaking changes
- Change flycheck-eslint-rulesdir (string) to flycheck-eslint-rules-directories (list of strings) #1016
- Require rust 1.7 or newer for rust and rust-cargo #1036
New syntax checkers:
- Slim with slim-lint #1013
- CHICKEN Scheme with csc #987
New features:
- Add :working-directory option to flycheck-define-command-checker #973 #1012
- flycheck-go-build-install-deps turns on dependency installation for go test as well as go build #1003
Improvements:
- Add default directory for haskell-stack-ghc and haskell-ghc checkers #1007
- rust and rust-cargo checkers now support the new error format of rust 1.12 #1016
- flycheck-verify-checker and flycheck-verify-setup now include information about configuration files of syntax checkers #1021 #1038

28 (Jun 05, 2016)¶

Breaking changes:
- Rename luacheck to lua-luacheck to comply with our naming conventions
- Remove flycheck-cppcheck-language-standard in favour of flycheck-cppcheck-standards which is a list of standards #960
New features:
- Add option to set binary name for rust-cargo #958
- Add flycheck-cppcheck-standards to pass multiple code standards to cppcheck #960
- Add flycheck-cppcheck-suppressions to suppress warnings for cppcheck #960
Improvements:
- Check Racket syntax in Geiser Mode #979
Bug fixes
- Do not signal errors when tslint reports no output #981
- Do not generate invalid temporary filenames on Windows #983

27 (May 08, 2016)¶

Breaking changes
- Require PHP Code Sniffer 2.6 or newer for php-phpcs #921
New syntax checkers:
- Go with go-unconvert #905
- Markdown with mdl #839 #916
- TypeScript with tslint #947 #949
Improvements:
- Pass checkdoc settings from Emacs to emacs-lisp-checkdoc #741 #937
Bug fixes:
- Fix parsing of syntax errors in triple-quoted strings for python-pycompile #948
- Correctly handle rules based on the current file name in php-phpcs #921

26 (Apr 27, 2016)¶

Flycheck now has a Code of Conduct which defines the acceptable behaviour and the moderation guidelines for the Flycheck community. #819

Flycheck also provides a Gitter channel now for questions and discussions about development. #820

The native Texinfo manual is again replaced with a Sphinx based documentation. We hope that this change makes the manual easier to edit and to maintain and more welcoming for new contributors. The downside is that we can not longer include a Info manual in Flycheck’s MELPA packages.

From this release onward Flycheck will use a single continuously increasing version number. Breaking changes may occur at any point.

Breaking changes:
- Remove flycheck-copy-messages-as-kill, obsolete since Flycheck 0.22
- Remove flycheck-perlcritic-verbosity, obsolete since Flycheck 0.22
- Replace flycheck-completion-system with flycheck-completing-read-function #870
- JSON syntax checkers now require json-mode and do not check in Javascript Mode anymore
- Prefer eslint over jshint for Javascript
- Obsolete flycheck-info in favour of the new flycheck-manual command
New syntax checkers:
- Processing #793 #812
- Racket #799 #873
New features:
- Add flycheck-puppet-lint-rc to customise the location of the puppetlint configuration file #846
- Add flycheck-puppet-lint-disabled-checks to disable specific checks of puppetlint #824
- New library flycheck-buttercup to support writing Buttercup specs for Flycheck
- Add flycheck-perlcriticrc to set a configuration file for Perl::Critic #851
- Add flycheck-jshint-extract-javascript to extract Javascript from HTML #825
- Add flycheck-cppcheck-language-standard to set the language standard for cppcheck #862
- Add flycheck-mode-line-prefix to customise the prefix of Flycheck’s mode line lighter #879 #880
- Add flycheck-go-vet-shadow to check for shadowed variables with go vet #765 #897
- Add flycheck-ghc-stack-use-nix to enable Nix support for Stack GHC #913
Improvements:
- Map error IDs from flake8-pep257 to Flycheck error levels
- Explicitly display errors at point with C-c ! h #834
- Merge message and checker columns in the error list to remove redundant ellipsis #828
- Indicate disabled checkers in verification buffers #749
- Do not enable Flycheck Mode in fundamental-mode buffers #883
- Write go test output to a temporary files #887
- Check whether lintr is actually installed #911
Bug fixes:
- Fix folding of C/C++ errors from included files #783
- Fix verification of SCSS-Lint checkstyle reporter
- Don’t fall back to rust if rust-cargo should be used #817
- Don’t change current buffer when closing the error message buffer #648
- Never display error message buffer in current window #822
- Work around a caching issue in Rubocop #844
- Fix checkdoc failure with some Emacs Lisp syntax #833 #845 #898
- Correctly parse Haskell module name with exports right after the module name #848
- Don’t hang when sending buffers to node.js processes on Windows #794 #850
- Parse suggestions from hlint #874
- Go errcheck handles multiple $GOPATH entries correctly now #580 #906
- Properly handle Go build failing in a directory with multiple packages #676 #904
- Make cppcheck recognise C++ header files #909
- Don’t run phpcs on empty buffers #907

0.25.1 (Nov 16, 2015)¶

Fix undefined function call in emacs-lisp syntax checker #791

0.25 (Nov 14, 2015)¶

Breaking changes:
- scala-scalastyle now expects a scalastyle executable in exec-path #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 #786
New syntax checkers:
- JSON with Python’s built-in json module #758
- Rust with cargo rustc #772
New features:
- Add flycheck-help-echo-function to customize the Help Echo of Flycheck overlays #730
- Use symbolic error IDs in Pylint #714
- Add flycheck-pylint-use-symbolic-id to disable symbolic IDs for Pylint #714
- Add flycheck-command-wrapper-function to wrap syntax checker commands before execution #629 #752
- Add flycheck-executable-find to customise how Flycheck searches executables #752
- Add flycheck-hlint-args to pass additional arguments to hlint #713 #762
- Add flycheck-go-build-tags and flycheck-go-install-deps to specify tags and automatically install dependencies with go build #674
- Add :standard-input property to syntax checkers to read source from standard input #673 #728
- Add support for JSX modes to some Javascript checkers #778
Improvements:
- Improve mode line display for buffers with only info messages #733
- Merge messages of all errors under cursor for Help Echo #730
- Align multi-line messages in error list #732 #731
- Cache GHC output for faster syntax checking and better template haskell support #708
- Fall back to rst if rst-sphinx is disabled #745 #746
- New uniform fringe indicators #750
- Demote AsciiDoc deprecation warnings to info level
Bug fixes:
- Fix error patterns of coq #742
- Support GFortran 5 #751
- Fix stack overflow when parsing hlint errors #760
- Fix error columns of jsonlint

0.24 (Aug 15, 2015)¶

Breaking changes:
- Remove Elixir syntax checker due to code execution #630
- Drop support for Emacs 24.1 and 24.2
New syntax checkers:
- Javascript with jscs #634 and standard #644
- Jade #686
- SQL with sqllint #691
- Groovy #716
- Haskell with stack ghc #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 #698 #701
- Add flycheck-perl-include-path to set include directories for Perl #621
- Add flycheck-rust-args to pass additional arguments to rustc
- Add flycheck-dmd-args to pass additional arguments to dmd #655
- Add flycheck-erlang-include-path #668 and flycheck-erlang-library-path #696 for Erlang
- Add flycheck-verilator-include-path to set include directories for Verilator #684
- Add flycheck-cppcheck-include-path to set include directories for cppcheck #687
- Add support for Hlint configuration file #682
- Add Hlint options for ignore rules, language extensions and hint packages #682
Improvements:
- Show chained checkers in Help buffers for syntax checkers #571
- Map custom error levels to compilation mode levels #700
- flycheck-verify-setup now includes the manually selected checker if any #705
- flycheck-select-checker now shows a verification buffer if the selected checker cannot be used #705
- Add flycheck-verify-checker to check whether a specific syntax checker can be used in a buffer #705
Bug fixes:
- Fix offset of column numbers in ESLint #640
- Properly parse indentation errors from Python 2.7 #635
- Don’t choke if default-directory does not exist #625
- Fix error parsing for Puppet 4
- Fix duplicate checkdoc errors on Emacs 25
- Fix level of info messages in flycheck-compile #669
- Allow custom :verify functions for command checkers #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 #607
- Enforce output format of flake8 #704
- Parse error ids from luacheck 0.11
- Fix patterns for Puppet environment names #694
- Properly locate configuration files from jshint and jscs #703
- Fix column offsets in eslint 1.0 #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 #572 #573
- Remove zsh support from sh-shellcheck, since Shellcheck does not support Zsh anymore
- Remove global-flycheck-mode from customization interface #595
New syntax checkers:
- R with lintr #512
- Lua with luacheck #591 #609
- SCSS with scss-lint #582 #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 #543
- Add flycheck-foodcritic-tags to select tags for Foodcritic #560
Improvements:
- chef-foodcritic handles relative paths correctly now #556
- Global Flycheck Mode enables Flycheck Mode even if there is no syntax checker for the buffer yet #568
- handlebars now supports Web Mode #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 #563
- Fix faulty mode line reporting #564
- Automatically initialize packages when checking user-init-file
- Properly initialize hook variables #593
- Fix handling of file names with symbolic links for some checkers #561
- Parse multiline type errors from rustc #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! #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 #529
- Remove flycheck-google-messages command
- Options and config file variables are not buffer-local anymore #546
New syntax checkers:
- Python with py_compile #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 #169 #524
- Add flycheck-define-command-checker as non-macro variant of flycheck-define-checker #524
- Add support for IDs of errors #529
- Add special id sexp to parse error ids with :error-patterns #529
- Parse error IDs from Checkstyle XML #259
- flycheck-copy-errors-as-kill can put error ids into kill ring now #529
- Parse error IDs from many error checkers #259
- Verify Flycheck setup in a buffer with flycheck-verify-setup #338
- Add options for arbitrary arguments to some syntax checkers #542
- Add flycheck-flake8-error-level-alist to customize error levels from flake8 #454
Improvements:
- Automatically disable syntax checkers that report too many errors #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 #511
- Parse help messages from rustc #517
- g in the error list checks the source buffer again #532
- haskell-ghc supports literate Haskell now #535
Bug fixes:
- Properly parse notes in sh-shellcheck #508
- Fix shell quoting in flycheck-compile #522 #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 #536
- Correctly compute error level of errors on included files in c/c++-clang and c/c++-gcc #451

0.21 (Oct 26, 2014)¶

Breaking changes:
- html-tidy is not enabled in Web Mode anymore #464
- d-dmd now requires DMD 2.066 or newer #460
- :next-checkers now requires the maximum permissible level instead of a custom predicate #472
- Remove flycheck-error-list-highlight-at-point face and related functionality #490
New syntax checkers:
- Coq
- RPM spec files with rpmlint #480 #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 #398 #485
- The error list can be sorted by message and syntax checker name now #500
- Add flycheck-error-list-checker-name face to customize the appearance of the syntax checker name in the error list #500
- Add flycheck-shellcheck-excluded-warnings to exclude warnings from ShellCheck reports #499
- Add flycheck-add-mode to add a new major mode to a syntax checker #506
- Add flycheck-gcc-openmp to enable OpenMP for GCC in C/C++ #507
Improvements:
- Improve GCC syntax checking by expanding templates #459
- d-dmd reports errors with columns now #460
- Remove Projectile-based config file search #461
- Do not change point when navigating in the error list #487
- ShellCheck warnings now include the corresponding warning code
Bug fixes:
- Expand default-directory before using it, to handle abbreviated paths gracefully #434
- Restore mouse support in the error list #468
- less now correctly resolves relative paths in data-uri #471
- go-errcheck now properly uses package names as syntax checker arguments
- c/c++-clang now handles empty error messages #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 #408
- Scala with scalastyle #425
- Fortran with GFortran #414 #450
- Ada with GNAT #414 #457
New features:
- Add flycheck-clang-no-exceptions and flycheck-gcc-no-exceptions to flag exceptions as errors in C++ #412
- Add flycheck-rust-crate-root to resolve inter-crate references in rust #417
- Add flycheck-clang-blocks to enable the block syntax in Clang #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 #424
- Add flycheck-rust-crate-type to make the Crate type customizable #446
- The mode line of the error list is now customizable with flycheck-error-list-mode-line #454
- Pressing n or p in the error list now shows the error at point in a separate window #452 #454
- Pressing RET in the error list now jumps to the error at point #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 #454
- Error levels defined with flycheck-define-error-level can now have a numeric severity used for sorting #454
Improvements:
- Use proper temporary files in python-flake8 #421
- Demote errors from package-initialize in the emacs-lisp checker #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 #428
- The rust syntax checker shows info messages now #439
- The sass and scss syntax checkers now use a temporary directory for their cache #443 #454
- Change the default of flycheck-eslintrc to nil #447
- Show the menu on the mode line lighter #365
- Greatly improve Flycheck’s menu
- n and p now navigate the error list by errors, not by lines #452 #444
- c/c++-clang does not use in-place temporary files anymore #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 #331
Breaking changes:
- The ruby-rubylint syntax checker now requires Ruby Lint 2.0 or newer. #405
New syntax checkers:
- Go with errcheck #393
New features:
- Add flycheck-keymap-prefix to change the prefix key for Flycheck keybindings #381
- Make the prefix of Flycheck’s temporary files customizable with flycheck-temp-prefix #387
- Add :error-filter property for syntax checkers to apply a custom function to modify or filter errors after parsing #397
- Add flycheck-rust-check-tests to disable syntax checking of test code in Rust #406
- Add flycheck-cppcheck-inconclusive to enable cppcheck tests that might give false positives #407
Improvements:
- Collapse redundant whitespace in messages from emacs-lisp #397
- Dedent messages from haskell-ghc #397
- Fold errors in included files into the error messages of the corresponding include in c/c++-clang #397
- The ruby-rubylint syntax checker now supports ruby-lint 2.0 and newer #405
Bug fixes:
- When stopping Flycheck, correctly kill running processes and cleanup their temporary files #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 #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 #353
New syntax checkers:
- Perl with Perl Critic #88
- Replace GNU Make with POSIX Make #322
- Shellcheck #267
- Go with golint #328
- Go with go tool vet #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 #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 #348
- Puppet Lint messages now include the name of the corresponding check
- rustc supports upcoming Rust 0.10 now #353
- Flycheck now handles Clang errors from included files #367

0.17 (Feb 1, 2014)¶

The manual was ported to Sphinx and is now located at http://flycheck.readthedocs.org #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 #321
New features:
- Extend syntax checkers with flycheck-add-next-checkers #266
Improvements:
- Immediately re-check the buffer when it was changed during a syntax check #301
- Do not defer syntax checker after idle change timeout #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 #314
- chef-foodcritic supports enh-ruby-mode now
Bug fixes
- Do not attach syntax checker processes to the buffer anymore #298
- Do not visit the file to check in emacs-lisp and emacs-lisp-checkdoc to avoid unintended side effects #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 #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 #230
New syntax checkers:
- Ruby with ruby-lint #250
- Handlebars #270
- YAML with yaml-jsyaml #253
- Chef recipes with foodcritic #255
- AsciiDoc #276
- CFEngine #271
- Racket #277
- Texinfo
- Verilog #296
- Javascript with eslint #291
- ERuby #285
New features:
- Define variables to override the executables of syntax checkers #272
- Interactively set the executable of a syntax checker with flycheck-set-checker-executable #272
- Disable syntax checkers easily with flycheck-disabled-checkers #269
- Add support for the Compass CSS framework in the sass and scss checkers, with flycheck-sass-compass and flycheck-scss-compass respectively #268
- Disable style checks in ruby-rubocop with flycheck-rubocop-lint-only #287
- Add support for Microsoft extensions in c/c++-clang via flycheck-clang-ms-extensions #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 #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 #282
- Properly resolve local module imports in haskell-ghc
Bug fixes:
- Make relative imports work with python-pylint #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 #214
- flycheck-display-errors-in-list is gone. The error list automatically highlights the error at point now #214
- Remove obsolete flycheck-declare-checker
New syntax checkers:
- YAML #236
- Javascript with gjslint #245
- Slim #246
- PHP using phpmd #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 #202
- Add flycheck-clang-language-standard to choose the language standard for C/C++ syntax checking #207
- Add flycheck-clang-definitions to set additional definitions for C/C++ syntax checking #207
- Add flycheck-clang-no-rtti to disable RTTI for C/C++ syntax checking #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 #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 #214
- The error list now automatically updates to show the errors of the current buffer #214
- Define new error levels with flycheck-define-error-level #212
- Add flycheck-clang-standard-library to choose the standard library for C/C++ syntax checking #234
- Customize the delay for displaying errors via flycheck-display-errors-delay #243
- Add info level for informational annotations by syntax checkers #215
- Add a new symbol temporary-file-name to pass temporary file names to syntax checkers #259
Improvements:
- The error list now refreshes automatically after each syntax check #214
- The errors at point are now automatically highlighted in the error list #214
- emacs-lisp-checkdoc does not longer check .dir-locals.el files
- Do not automatically check syntax in encrypted files #222
- Parse notes from c/c++-clang into info level messages #215
- Parse convention warnings from pylint to info level #204
- Demote naming warnings from python-flake8 to info level #215
- Support enh-ruby-mode in Ruby syntax checkers #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 #225
- Do not emit spurious flawed definition warning in the rst syntax checker
- Handle abbreviated file names in luac output, by simply ignoring them #251
- Correctly redirect the output binary of the go-build syntax checker #259
- Fix Cppcheck parsing with the built-in Emacs XML parser #263

0.14.1 (Aug 16, 2013)¶

Bug fixes:
- Add a missing dependency #194

0.14 (Aug 15, 2013)¶

Breaking changes:
- Introduce flycheck-define-checker and obsolete flycheck-declare-checker #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 #176
- Change the default flycheck-highlighting-mode to symbols #179
- Drop support for Pylint 0.x in python-pylint #184
New features:
- List errors at point only with prefix arg to flycheck-list-errors #166
- Add new display function flycheck-display-errors-in-list to display errors at point in the error list #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 #174
- New flycheck-emacs-lisp-initialize-packages option to initialize packages in the emacs-lisp syntax checker #176
- New flycheck-emacs-lisp-package-user-dir option to configure the package directory for the emacs-lisp syntax checker #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 #179
New syntax checkers:
- LESS #160
- Haskell with ghc, hdevtools and hlint #162
- C/C++ with cppcheck #170
- C/C++ with clang #172
- CoffeeScript with coffee
- XML with xmllint #180
- D with dmd #167
Improvements:
- Support Web Mode in html-tidy syntax checker #157
- Support Rubocop 0.9 and drop support for older Rubocop releases #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 #166
- Do not obscure active minibuffer input when displaying errors in the echo area #175
- Fix universal prefix argument for flycheck-next-error at C-c ! n
- Correctly parse output of coffeelint 0.5.7 #192
- Correctly parse output of pylint 1.0 #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 #141
- Make the delay before starting a syntax check customizable via flycheck-idle-change-delay #144
- Make display of errors under point customizable via flycheck-display-errors-function #156
Improvements
- Always highlight errors on top of warnings now
- Do not trigger syntax checks in the middle of commands #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 #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 #143
- Correctly clean up information about running processes
- Fix compatibility with Emacs 24.2 and earlier #150
- Fix version information on Emacs trunk builds

0.12 (May 18, 2013)¶

New syntax checkers:
- Ruby using jruby #136
- Puppet #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 #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 #136

0.11 (May 01, 2013)¶

New syntax checkers:
- Scala #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 #128
- Customizable configuration file search, via flycheck-locate-config-file-functions #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 #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 #112
- Ruby using rubocop #113
- Elixir #108
- Erlang #122
Removed syntax checkers:
- Python using Pyflakes. Use the superior Flake8 syntax checker #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 #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 #99
Bug fixes:
- Fix error highlighting and navigation in narrowed buffers
- Use a hopefully more reliable way to parse output of PHP CodeSniffer #118

0.9 (Apr 13, 2013)¶

New syntax checkers:
- SCSS using scss #103
- RST (ReStructuredText) using Docutils
- Go using go build and go test #107
Improvements:
- Quit the error message window when navigating away from error locations

0.8 (Apr 9, 2013)¶

New syntax checkers:
- Go using gofmt #91
- Rust using rustc #101
New features:
- Add a global Flycheck mode. (global-flycheck-mode) is now the recommended way to enable Flycheck #29
- Add support for syntax checker options #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 #94
- Show all error messages at point #96
- Add support for naming warings from flake8 2 #98
- Flycheck mode is not longer enabled for buffers whose names start with a space
- Improve highlighting to reduce screen flickering #100

0.7.1 (Feb 23, 2013)¶

Bug fixes:
- Do not signal errors from flycheck-mode #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 #86

0.7 (Feb 14, 2013)¶

New features:
- Navigate to source of syntax checker declarations from syntax checker help
- Add online Info manual #60
Improvements:
- Use pipes instead of TTYs to read output from syntax checkers
- Defer syntax checks for invisible buffers #80
- Immediately display error messages after error navigation #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 #78
- Fix infinite recursion on Windows #81

0.6.1 (Jan 30, 2013)¶

Fix package dependencies

0.6 (Jan 29, 2013)¶

New syntax checkers:
- Emacs Lisp with checkdoc-current-buffer #53
- PHP with PHP CodeSniffer #72
Removed syntax checkers:
- Javascript with jsl
New features:
- Error navigation with next-error and previous-error #26
- Fringe icons instead of error indicators #33
- Menu entry for Flycheck #59
- Customizable error highlighting, taking the column number into account #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 #58
- Use multiple syntax checkers during a syntax check #31
- Add dedicated help for syntax checkers #52
Improvements:
- Match error patterns in order of declaration #55
Bug fixes:
- Inherit highlighting faces from built-in faces #24
- Correct error patterns of the HTML syntax checker #36
- Detect syntax errors in the python-flake8 syntax checker #42
- Fix various regressions after introducing unit tests
- Inhibit syntax checking during package installation #45
- Disable syntax checking in Tramp buffers #54
- Preserve whitespace in error messages #65
API changes:
- Replace syntax checker variables with syntax checker declarations #41
- Support parsing errors with arbitrary functions instead of error patterns #38
- Add an error parser for Checkstyle-like XML output #38

0.5 (Dec 28, 2012)¶

New syntax checkers:
- SASS #15
- Perl #21
- XML
- Lua #30
New features:
- Support manual buffer-local selection of syntax checker #25
- Add customizable error indicators #28
- Echo error messages at point without 3rd-party libraries like flymake-cursor #27
Improvements:
- Remember the last automatically selected syntax checker #24
Bug fixes:
- Fix syntax checking of buffers without backing files #19
API changes:
- Replace underlying Flymake API with a custom syntax checking implementation #15

0.4 (Nov 21, 2012)¶

Rename the project to Flycheck #5
New syntax checkers
- HAML #9
- CSS #9
- Javascript with jsl #9
- Javascript with jshint #16
- JSON #12
- LaTeX with lacheck
Bug fixes:
- Fix type error when checking compressed Emacs Lisp #10

0.3 (Nov 21, 2012)¶

Replace flymake-mode with a custom syntax checking minor mode #4

0.2 (Oct 25, 2012)¶

New syntax checkers:
- PHP
API changes:
- Simplify syntax checker declarations #2

0.1 (Oct 11, 2012)¶

Initial release as flymake-checkers

New syntax checkers:
- TeX/LaTeX
- Shell scripts
- Python
- Ruby
- Coffeescript
- Emacs Lisp