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elisp-lint
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Basic linting for Emacs Lisp
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elisp-lint ========== Basic linting for Emacs Lisp [](https://stable.melpa.org/#/elisp-lint) [](https://melpa.org/#/elisp-lint) [](https://circleci.com/gh/gonewest818/elisp-lint) [](https://codecov.io/gh/gonewest818/elisp-lint) This is a tool for finding certain problems in Emacs Lisp files. Use it on the command line like this: emacs -Q --batch -l elisp-lint.el -f elisp-lint-files-batch *.el You can disable individual checks by passing flags on the command line: emacs -Q --batch -l elisp-lint.el -f elisp-lint-files-batch --no-indent *.el You can use file variables or `.dir-locals.el` to disable checks completely, and also to configure certain checks as described below. ((emacs-lisp-mode . ((fill-column . 80) (indent-tabs-mode . nil) (elisp-lint-ignored-validators . ("byte-compile")) (elisp-lint-indent-specs . ((describe . 1) (it . 1)))))) Validators ---------- ### byte-compile ### Byte-compiles the file with all warnings enabled. ### check-declare ### Verifies all `declare-function` statements are legitimate. ### checkdoc ### Runs checkdoc on the file to enforce standards in documentation. ### fill-column ### Verifies that no line exceeds the number of columns in `fill-column`. Certain lines in the file are excluded from this check, and can have unlimited length: * The package summary comment line, which by definition must include the package name, a summary description (up to 60 characters), and an optional `-*- lexical-binding:t -*-` declaration. * The \"Package-Requires\" header, whose length is determined by the number of dependencies specified. ### indent ### Verifies that each line is indented according to `emacs-lisp-mode`. Where macros are defined with special `indent` metadata, use the `elisp-lint-indent-specs` alist to specify each symbol's required indent. ### indent-character ### Verifies the indentation is consistently tabs or spaces, according to the value of `indent-tabs-mode`. ### package-lint ### Use `package-lint` to perform checks on package metadata and elisp style. Because this check uses the `package` library to validate when dependencies can be installed from an available package repository, this check will suppress any "package is not installable" errors when running in a context where the `package` library is not initialized. This can happen, e.g. when running Emacs on packages installed with Cask. ### trailing-whitespace ### Verifies the buffer has no lines with trailing whitespace. Configuration ------------- Use a file variable or `.dir-locals.el` to override the variables mentioned above. Sample Report ------------- ``` text test/data/example.el:0:0 (checkdoc) You should have a section marked ";;; Commentary:" test/data/example.el:0:0 (checkdoc) The first line should be of the form: ";;; package --- Summary" test/data/example.el:1:0 (error) Package should have a ;;; Commentary section. test/data/example.el:1:0 (error) Package should have a Homepage or URL header. test/data/example.el:1:0 (error) package.el cannot parse this buffer: Package lacks a file header test/data/example.el:5:0 (checkdoc) You should have a section marked ";;; Code:" test/data/example.el:8:0 (checkdoc) White space found at end of line test/data/example.el:8:0 (whitespace) trailing whitespace found test/data/example.el:9:0 (indent) ! (b y)) test/data/example.el:10:0 (indent) ! (message "%s" a)) test/data/example.el:10:0 (indent-character) tabs instead of spaces test/data/example.el:10:0 (whitespace) trailing whitespace found test/data/example.el:11:0 (fill-column) line length 80 exceeded test/data/example.el:12:0 (indent) ! (setq a 3) test/data/example.el:16:0 (error) "foo" doesn't start with package's prefix "difftest". test/data/example.el:17:0 (checkdoc) First line should be capitalized test/data/example.el:17:0 (checkdoc) First sentence should end with punctuation test/data/example.el:17:0 (indent) ! "emacs is fun" test/data/example.el:18:0 (warning) Closing parens should not be wrapped onto new lines. test/data/example.el:18:0 (indent) ! ) test/data/example.el:21:0 (checkdoc) The footer should be: (provide 'example)\n;;; example.el ends here test/data/example.el FAIL ``` Changelog --------- * Version 0.5-SNAPSHOT (MELPA) - suppress "Package X is not installable" errors when running in a context where 'package-initialize' hasn't occurred * Version 0.4-SNAPSHOT (MELPA Stable, March 2020) - Provide a summary report of all tests [#20] - Integrate package-lint [#19] - Remove package-format, as package-lint covers the same territory - Make byte-compile errors and warnings more robust - Make the fill-column checker ignore the package summary line [#25] - Make 'fill-column' checker ignore the package requires header - Add dependency on dash.el - Colorized output * Version 0.3 (December 2019) - Emacs 23 support is deprecated [#13] - Adopt CircleCI and drop Travis CI [#9] [#14] - Add check-declare validator [#16] - Generate autoloads before bytecompile [#8] * Version 0.2.0 (Feb 2018) - Project transferred to new maintainer - Whitespace check permits page-delimiter (^L) - Indentation check prints the diff to console - User can specify indent specs to tell the checker about macros - Added checkdoc (available only Emacs 25 and newer) - Cleared up the console output for easier reading in CI - Expand Travis CI test matrix to include Emacs 25 and 26 * Version 0.1.0 (2015) - Basic linting functionality implemented Credits ------- The initial development of `elisp-lint` is Copyright 2013-2015 Nikolaj Schumacher. This project was transferred to Neil Okamoto in 2018. Updates and ongoing development are Copyright 2018-2020 Neil Okamoto and contributors. Contributing ------------ Pull requests are welcome!
