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remark-slug

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Comparing version 3.0.2 to 4.0.0

5

history.md

@@ -5,2 +5,7 @@ <!--remark setext-->

4.0.0 / 2016-01-23
==================
* Refactor API ([`4104cd2`](https://github.com/wooorm/remark-slug/commit/4104cd2))
3.0.2 / 2016-01-23

@@ -7,0 +12,0 @@ ==================

224

index.js

@@ -19,159 +19,39 @@ /**

var visit = require('unist-util-visit');
var repeat = require('repeat-string');
var slugs = require('github-slugger')();
var slugg = null;
var fs = {};
var path = {};
var proc = {};
try {
slugg = require('slugg');
} catch (exception) {/* empty */}
try {
fs = require('fs');
} catch (exception) {/* empty */}
try {
path = require('path');
} catch (exception) {/* empty */}
/*
* Hide process use from browserify and component.
*/
/* istanbul ignore else */
if (typeof global !== 'undefined') {
/* global global */
proc = global.process;
}
/*
* Methods.
*/
var exists = fs.existsSync;
var resolve = path.resolve;
/*
* Constants.
*/
var MODULES = 'node_modules';
var EXTENSION = '.js';
var NPM = 'npm';
var GITHUB = 'github';
var SLUGG = 'slugg';
var DASH = '-';
var UNDERSCORE = '_';
var DEFAULT_LIBRARY = GITHUB;
/**
* Find a library.
* Patch `value` on `context` at `key`, if
* `context[key]` does not already exist.
*
* @param {string} pathlike - File-path-like to load.
* @return {*} - Library.
* @param {Object} context - Context to patch.
* @param {string} key - Key to patch at.
* @param {*} value - Value to patch.
*/
function loadLibrary(pathlike) {
var cwd;
var local;
var npm;
var plugin;
if (pathlike === SLUGG && slugg) {
return slugg;
function patch(context, key, value) {
if (!context[key]) {
context[key] = value;
}
cwd = proc.cwd && proc.cwd();
/* istanbul ignore if */
if (!cwd) {
throw new Error('Cannot lazy load library when not in node');
}
local = resolve(cwd, pathlike);
npm = resolve(cwd, MODULES, pathlike);
if (exists(local) || exists(local + EXTENSION)) {
plugin = local;
} else if (exists(npm)) {
plugin = npm;
} else {
plugin = pathlike;
}
return require(plugin);
return context[key];
}
/**
* Wraps `slugg` to generate slugs just like npm would.
* Patch slugs on heading nodes.
*
* @see https://github.com/npm/marky-markdown/blob/9761c95/lib/headings.js#L17
* Transformer is invoked for every file, so there’s no need
* to specify extra logic to get per-file slug pools.
*
* @param {function(string): string} library - Value to
* slugify.
* @return {function(string): string} - Modifier.
* @param {Node} ast - Root node.
*/
function npmFactory(library) {
/**
* Generate slugs just like npm would.
*
* @param {string} value - Value to slugify.
* @return {string} - Slug.
*/
function npm(value) {
return library(value).replace(/[<>]/g, '').toLowerCase();
}
function transformer(ast) {
slugs.reset();
return npm;
}
visit(ast, 'heading', function (node) {
var id = slugs.slug(toString(node));
var data = patch(node, 'data', {});
/**
* Wraps `slugg` to generate slugs just like GitHub would.
*
* @param {function(string): string} library - Library to
* use.
* @return {function(string): string} - Modifier.
*/
function githubFactory(library) {
/**
* Hacky. Sometimes `slugg` uses `replacement` as an
* argument to `String#replace()`, and sometimes as
* a literal string.
*
* @param {string} $0 - Value to transform.
* @return {string} - Replacement.
*/
function separator($0) {
var match = $0.match(/\s/g);
if ($0 === DASH || $0 === UNDERSCORE) {
return $0;
}
return repeat(DASH, match ? match.length : 0);
}
/**
* @see seperator
* @return {string} - Dash.
*/
function dash() {
return DASH;
}
separator.toString = dash;
/**
* Generate slugs just like GitHub would.
*
* @param {string} value - Value to slugify.
* @return {string} - Slug.
*/
function github(value) {
return library(value, separator).toLowerCase();
}
return github;
patch(data, 'id', id);
patch(data, 'htmlAttributes', {});
patch(data.htmlAttributes, 'id', id);
});
}

@@ -182,59 +62,5 @@

*
* @param {Remark} remark - Processor.
* @param {Object?} [options] - Configuration.
* @return {function(node)} - Transformer.
* @return {Function} - Transformer.
*/
function attacher(remark, options) {
var settings = options || {};
var library = settings.library || DEFAULT_LIBRARY;
var isNPM = library === NPM;
var isGitHub = library === GITHUB;
if (isNPM || isGitHub) {
library = SLUGG;
}
if (typeof library === 'string') {
library = loadLibrary(library);
}
if (isNPM) {
library = npmFactory(library);
} else if (isGitHub) {
library = githubFactory(library);
}
/**
* Patch `value` on `context` at `key`, if
* `context[key]` does not already exist.
*
* @param {Object} context - Context to patch.
* @param {string} key - Key to patch at.
* @param {*} value - Value to patch.
*/
function patch(context, key, value) {
if (!context[key]) {
context[key] = value;
}
return context[key];
}
/**
* Adds an example section based on a valid example
* JavaScript document to a `Usage` section.
*
* @param {Node} ast - Root node.
*/
function transformer(ast) {
visit(ast, 'heading', function (node) {
var id = library(toString(node));
var data = patch(node, 'data', {});
patch(data, 'id', id);
patch(data, 'htmlAttributes', {});
patch(data.htmlAttributes, 'id', id);
});
}
function attacher() {
return transformer;

@@ -241,0 +67,0 @@ }

10

package.json
{
"name": "remark-slug",
"version": "3.0.2",
"version": "4.0.0",
"description": "Add anchors to remark heading nodes",

@@ -16,6 +16,5 @@ "license": "MIT",

"dependencies": {
"github-slugger": "^1.0.0",
"mdast-util-to-string": "^1.0.0",
"unist-util-visit": "^1.0.0",
"repeat-string": "^1.5.0",
"slugg": "^0.1.0"
"unist-util-visit": "^1.0.0"
},

@@ -46,4 +45,3 @@ "repository": {

"slug": "^0.9.0",
"tape": "^4.0.0",
"to-slug-case": "^1.0.0"
"tape": "^4.0.0"
},

@@ -50,0 +48,0 @@ "scripts": {

28

readme.md
# remark-slug [![Build Status][travis-badge]][travis] [![Coverage Status][codecov-badge]][codecov]
Add anchors to [**remark**][remark] heading nodes.
Add anchors to [**remark**][remark] heading nodes using GitHub’s
algorithm.

@@ -45,4 +46,3 @@ > Works great with [**remark-html**][remark-html],

```bash
remark ... -u remark-slug
remark ... -u 'remark-slug=library:"npm"'
remark readme.md -u slug
```

@@ -52,3 +52,3 @@

### `remark.use(slug[, options])`
### `remark.use(slug)`

@@ -64,20 +64,4 @@ Adds slugs to markdown headings.

* `slug` — This plugin;
* `slug` — This plugin.
* `options` (`Object?`)
* `'library'` — (`string` or `Function`, default: `'github'`):
* `'github'` — Slugs just like GitHub;
* `'npm'`
— Slugs just like npm (caveat: npm doesn’t support links in
headings, [yet][marky-pr]);
* `string` (e.g., `'slug'`, `'slugg'`)
— Library to require (not in the browser);
* `Function` (e.g., `require('slugg')`)
— Library to use.
## License

@@ -107,4 +91,2 @@

[marky-pr]: https://github.com/npm/marky-markdown/pull/38
[remark]: https://github.com/wooorm/remark

@@ -111,0 +93,0 @@

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