jsstyle is a style checker for JavaScript coding style. This tool is derived
from the cstyle tool used to check for the style used in the Solaris kernel,
sometimes known as "Bill Joy Normal Form". This tool is a little bit
configurable. However it strives to enforces a single coding style based on
that cstyle. See "Configuration Options" below.
The original cstyle tool can be found here: https://github.com/illumos/illumos-gate/blob/master/usr/src/tools/scripts/cstyle.pl
The document describing C Style is available here: https://www.cis.upenn.edu/~lee/06cse480/data/cstyle.ms.pdf
Examples of conditions checked by this tool include:
- Strings must be quoted with single quotes.
- Blocks must be indented with tabs, not spaces.
- Continuation lines must be indented with 4 spaces.
- Keywords (for, if, function, etc.) must be followed with a space.
- One line cannot contain multiple keywords.
- Relational operators must be surrounded with spaces.
- There must be no spaces between tabs, nor tabs between spaces.
- Lines must not end with whitespace.
- Multi-line block comments must start and end with a blank line.
- Return expressions must be parenthesized.
No new features planned. The biggest known issue is that jsstyle doesn't grok regexes, so you usually need to wrap these in JSSTYLED comments (see below).
jsstyle [OPTIONS] file1.js [file2.js ...]
Configuration options may be specified in a file (one option per line) with the "-f PATH" switch, or on the command line with the "-o OPTION1,OPTION2" switch.
As stated about, jsstyle is opinionated and intends to stay that way.
That said, this author was arm twisted under duress to allow the following
configurability.
doxygen Allow doxygen-style block comments `/** /*!`.
splint Allow splint-style lint comments `/*@ ... @*/`.
This is legacy. Does anyone use this?
indent=<NUM|tab> An integer number of spaces for indentation, or
'tab' for tab indentation (the default).
strict-indent Boolean option, set to 1 to force indents of spaces
to be a multiple of indent parameter.
line-length An integer number to specify the maximum length
of a line (default: 80)
literal-string-quote 'single' (the default) or 'double'. Specifies
the preferred quote character for literal strings.
unparenthesized-return Boolean option, set to 0 to disable the
"unparenthesized return expression" check.
blank-after-start-comment
Boolean option, set to 0 to disable the
"missing blank after start comment" check. `// `
blank-after-open-comment
Boolean option, set to 0 to disable the
"missing blank after open comment" check. `/* */`
no-blank-for-anon-function
Boolean option, set to 1 to allow anonymous
functions without blank before paren. `function() { ... }`
continuation-at-front Boolean option, set to 1 to force continations
to be at the beginning rather than end of line.
leading-right-paren-ok Boolean option, set to 1 to allow ) to start a
line.
whitespace-after-left-paren-ok
Boolean option, allow whitespace after a (
character.
leading-comma-ok Boolean option to allow lines to begin with commas
(preceded by whitespace).
uncuddled-else-ok Boolean option to allow for an else block to begin
on a new line.
When you want jsstyle to ignore a line, you can use this:
/* JSSTYLED */
ignore = this + line;
Or for a block:
/* BEGIN JSSTYLED */
var here
, be
, some = funky
, style
/* END JSSTYLED */
CDDL