submark alternatives and similar packages
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skylighting
A Haskell syntax highlighting library with tokenizers derived from KDE syntax highlighting descriptions -
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double-conversion
A fast Haskell library for converting between double precision floating point numbers and text strings. It is implemented as a binding to the V8-derived C++ double-conversion library. -
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WorkOS - The modern identity platform for B2B SaaS
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README
submark: Extract a part from CommonMark/Markdown docs
submark is a CLI program to extract some particular section from
a given CommonMark/Markdown document. I use it for myself to extract
the latest version section from the CHANGELOG.md file, and then reuse the text
for the corresponding release note on GitHub releases, during automated release
process which is run on CI.
Download & installation
For Linux x86_64, executable binaries are available on GitHub releases. Each file is a single executable, and statically linked so that it's executable as a standalone without dependencies.
For other platforms, you need to build it by yourself. It's written in Haskell, so you need to install Haskell Stack first. It can be built in the same way other Haskell programs are:
$ stack setup && stack install
I'm going to officially support executable binaries for other platforms
if anyone asks. (I thought submark wouldn't be useful on other than Linux
since the most of CI machines are Linux, but it might be wrong.)
Usage examples
The following examples use John Gruber's original Markdown introduction:
$ wget https://daringfireball.net/projects/markdown/index.text
Extracting an H3 heading Command-Line:
$ submark --h3 "Command-Line" index.text
### Command-Line
Use the `--html4tags` command-line switch to produce HTML output from a
Unix-style command line. E.g.:
% perl Markdown.pl --html4tags foo.text
Type `perldoc Markdown.pl`, or read the POD documentation within the
Markdown.pl source code for more information.
Note that its textual style differ from the original text.
Since submark internally builds an abstract syntax tree from the given input
text and then render again the result tree, it doesn't maintain trivial styles
(e.g., whitespaces, ATX vs. Setext headings) but only the semantics.
There are options from --h1 to --h6:
$ submark --h2 "Download" index.text
## Download
[Markdown 1.0.1](http://daringfireball.net/projects/downloads/Markdown_1.0.1.zip)
(18 KB) -- 17 Dec 2004
The leading heading can be omitted:
$ submark --h2 "Download" --omit-heading index.text
[Markdown 1.0.1](http://daringfireball.net/projects/downloads/Markdown_1.0.1.zip)
(18 KB) -- 17 Dec 2004
Matching is case sensitive by default, but case can be ignored using the option
-i/--ignore-case:
$ submark --h2 "DOWNload" index.text
$ submark --h2 "DOWNload" --ignore-case index.text
## Download
[Markdown 1.0.1](http://daringfireball.net/projects/downloads/Markdown_1.0.1.zip)
(18 KB) -- 17 Dec 2004
By Unix convention, - means pipe:
$ submark --h2 "Download" - < index.text
## Download
[Markdown 1.0.1](http://daringfireball.net/projects/downloads/Markdown_1.0.1.zip)
(18 KB) -- 17 Dec 2004
There's -o/--out-file option as well:
$ submark -o download.md --h2 "Download" index.text