diff options
Diffstat (limited to 'vendor/github.com/russross/blackfriday/README.md')
| -rw-r--r-- | vendor/github.com/russross/blackfriday/README.md | 130 |
1 files changed, 108 insertions, 22 deletions
diff --git a/vendor/github.com/russross/blackfriday/README.md b/vendor/github.com/russross/blackfriday/README.md index 2e0db355..3c62e137 100644 --- a/vendor/github.com/russross/blackfriday/README.md +++ b/vendor/github.com/russross/blackfriday/README.md @@ -1,4 +1,6 @@ -Blackfriday [](https://travis-ci.org/russross/blackfriday) +Blackfriday +[![Build Status][BuildSVG]][BuildURL] +[![Godoc][GodocV2SVG]][GodocV2URL] =========== Blackfriday is a [Markdown][1] processor implemented in [Go][2]. It @@ -16,27 +18,27 @@ It started as a translation from C of [Sundown][3]. Installation ------------ -Blackfriday is compatible with any modern Go release. With Go 1.7 and git -installed: +Blackfriday is compatible with any modern Go release. With Go and git installed: - go get gopkg.in/russross/blackfriday.v2 + go get -u gopkg.in/russross/blackfriday.v2 -will download, compile, and install the package into your `$GOPATH` -directory hierarchy. Alternatively, you can achieve the same if you -import it into a project: - - import "gopkg.in/russross/blackfriday.v2" - -and `go get` without parameters. +will download, compile, and install the package into your `$GOPATH` directory +hierarchy. Versions -------- Currently maintained and recommended version of Blackfriday is `v2`. It's being -developed on its own branch: https://github.com/russross/blackfriday/v2. You -should install and import it via [gopkg.in][6] at -`gopkg.in/russross/blackfriday.v2`. +developed on its own branch: https://github.com/russross/blackfriday/tree/v2 and the +documentation is available at +https://godoc.org/gopkg.in/russross/blackfriday.v2. + +It is `go get`-able via [gopkg.in][6] at `gopkg.in/russross/blackfriday.v2`, +but we highly recommend using package management tool like [dep][7] or +[Glide][8] and make use of semantic versioning. With package management you +should import `github.com/russross/blackfriday` and specify that you're using +version 2.0.0. Version 2 offers a number of improvements over v1: @@ -56,9 +58,43 @@ Potential drawbacks: v2. See issue [#348](https://github.com/russross/blackfriday/issues/348) for tracking. +If you are still interested in the legacy `v1`, you can import it from +`github.com/russross/blackfriday`. Documentation for the legacy v1 can be found +here: https://godoc.org/github.com/russross/blackfriday + +### Known issue with `dep` + +There is a known problem with using Blackfriday v1 _transitively_ and `dep`. +Currently `dep` prioritizes semver versions over anything else, and picks the +latest one, plus it does not apply a `[[constraint]]` specifier to transitively +pulled in packages. So if you're using something that uses Blackfriday v1, but +that something does not use `dep` yet, you will get Blackfriday v2 pulled in and +your first dependency will fail to build. + +There are couple of fixes for it, documented here: +https://github.com/golang/dep/blob/master/docs/FAQ.md#how-do-i-constrain-a-transitive-dependencys-version + +Meanwhile, `dep` team is working on a more general solution to the constraints +on transitive dependencies problem: https://github.com/golang/dep/issues/1124. + + Usage ----- +### v1 + +For basic usage, it is as simple as getting your input into a byte +slice and calling: + + output := blackfriday.MarkdownBasic(input) + +This renders it with no extensions enabled. To get a more useful +feature set, use this instead: + + output := blackfriday.MarkdownCommon(input) + +### v2 + For the most sensible markdown processing, it is as simple as getting your input into a byte slice and calling: @@ -85,7 +121,7 @@ Here's an example of simple usage of Blackfriday together with Bluemonday: ```go import ( "github.com/microcosm-cc/bluemonday" - "github.com/russross/blackfriday" + "gopkg.in/russross/blackfriday.v2" ) // ... @@ -93,11 +129,21 @@ unsafe := blackfriday.Run(input) html := bluemonday.UGCPolicy().SanitizeBytes(unsafe) ``` -### Custom options +### Custom options, v1 + +If you want to customize the set of options, first get a renderer +(currently only the HTML output engine), then use it to +call the more general `Markdown` function. For examples, see the +implementations of `MarkdownBasic` and `MarkdownCommon` in +`markdown.go`. + +### Custom options, v2 If you want to customize the set of options, use `blackfriday.WithExtensions`, `blackfriday.WithRenderer` and `blackfriday.WithRefOverride`. +### `blackfriday-tool` + You can also check out `blackfriday-tool` for a more complete example of how to use it. Download and install it using: @@ -117,6 +163,22 @@ installed in `$GOPATH/bin`. This is a statically-linked binary that can be copied to wherever you need it without worrying about dependencies and library versions. +### Sanitized anchor names + +Blackfriday includes an algorithm for creating sanitized anchor names +corresponding to a given input text. This algorithm is used to create +anchors for headings when `EXTENSION_AUTO_HEADER_IDS` is enabled. The +algorithm has a specification, so that other packages can create +compatible anchor names and links to those anchors. + +The specification is located at https://godoc.org/github.com/russross/blackfriday#hdr-Sanitized_Anchor_Names. + +[`SanitizedAnchorName`](https://godoc.org/github.com/russross/blackfriday#SanitizedAnchorName) exposes this functionality, and can be used to +create compatible links to the anchor names generated by blackfriday. +This algorithm is also implemented in a small standalone package at +[`github.com/shurcooL/sanitized_anchor_name`](https://godoc.org/github.com/shurcooL/sanitized_anchor_name). It can be useful for clients +that want a small package and don't need full functionality of blackfriday. + Features -------- @@ -184,7 +246,7 @@ implements the following extensions: and supply a language (to make syntax highlighting simple). Just mark it like this: - ```go + ``` go func getTrue() bool { return true } @@ -193,6 +255,15 @@ implements the following extensions: You can use 3 or more backticks to mark the beginning of the block, and the same number to mark the end of the block. + To preserve classes of fenced code blocks while using the bluemonday + HTML sanitizer, use the following policy: + + ``` go + p := bluemonday.UGCPolicy() + p.AllowAttrs("class").Matching(regexp.MustCompile("^language-[a-zA-Z0-9]+$")).OnElements("code") + html := p.SanitizeBytes(unsafe) + ``` + * **Definition lists**. A simple definition list is made of a single-line term followed by a colon and the definition for that term. @@ -218,8 +289,10 @@ implements the following extensions: * **Strikethrough**. Use two tildes (`~~`) to mark text that should be crossed out. -* **Hard line breaks**. With this extension enabled newlines in the input - translate into line breaks in the output. This extension is off by default. +* **Hard line breaks**. With this extension enabled (it is off by + default in the `MarkdownBasic` and `MarkdownCommon` convenience + functions), newlines in the input translate into line breaks in + the output. * **Smart quotes**. Smartypants-style punctuation substitution is supported, turning normal double- and single-quote marks into @@ -258,15 +331,21 @@ are a few of note: * [LaTeX output](https://bitbucket.org/ambrevar/blackfriday-latex): renders output as LaTeX. +* [bfchroma](https://github.com/Depado/bfchroma/): provides convenience + integration with the [Chroma](https://github.com/alecthomas/chroma) code + highlighting library. bfchroma is only compatible with v2 of Blackfriday and + provides a drop-in renderer ready to use with Blackfriday, as well as + options and means for further customization. + -Todo +TODO ---- * More unit testing -* Improve unicode support. It does not understand all unicode +* Improve Unicode support. It does not understand all Unicode rules (about what constitutes a letter, a punctuation symbol, etc.), so it may fail to detect word boundaries correctly in - some instances. It is safe on all utf-8 input. + some instances. It is safe on all UTF-8 input. License @@ -281,3 +360,10 @@ License [4]: https://godoc.org/gopkg.in/russross/blackfriday.v2#Parse "Parse func" [5]: https://github.com/microcosm-cc/bluemonday "Bluemonday" [6]: https://labix.org/gopkg.in "gopkg.in" + [7]: https://github.com/golang/dep/ "dep" + [8]: https://github.com/Masterminds/glide "Glide" + + [BuildSVG]: https://travis-ci.org/russross/blackfriday.svg?branch=master + [BuildURL]: https://travis-ci.org/russross/blackfriday + [GodocV2SVG]: https://godoc.org/gopkg.in/russross/blackfriday.v2?status.svg + [GodocV2URL]: https://godoc.org/gopkg.in/russross/blackfriday.v2 |