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How to use gm (a goldmark cli tool).

Convert multiple files at once

> gm '*.md' 'subfolder/*.md' -o outfolder

Convert piped input with specified theme

> cat file.md | gm -c jasonm23-markdown stdin > output.html

Here jasonm23-markdown is converted to https://kpym.github.io/markdown-css/jasonm23-markdown.min.css.

Available themes

The list off all available css themre is: air, github, jasonm23-dark, jasonm23-foghorn, jasonm23-markdown, jasonm23-swiss, markedapp-byword, mixu-page, mixu-radar, modest, retro, roryg-ghostwriter, splendor, thomasf-solarizedcssdark, thomasf-solarizedcsslight, witex.

All this theme are hosted on GitHub pages of the markdown-css project.

Custom HTML template

The custom HTML template can contain the following variables:

  • {{.html}} contains the parsed html code from the markdown;
  • {{.css}} contains the css link obtained by the --css parameter;
  • {{.title}} contains the first h1 title, or the --title parameter if no h1 title is present in the code.
> gm --html mymodel.html README.md

We can use a file or a string as --html parameter (run in bash here):

> echo "*test*" | gm -t "Test page" -c air --html $'title: {{.title}}\ncss: {{.css}}\nhtml: {{.html}}'
title: Test page
css: https://kpym.github.io/markdown-css/air.min.css
html: <p><em>test</em></p>

Serve at localhost

When used with --serve/-s flag gm start serving all files from the specified folder. The .md files are converted and served as html but all other files are staticly served. To serve the current folder you can simply run:

> gm -s

When some .md file is requested it is converted and wraped in a full html with live.js inside. In this way every second a HEAD request is made and if the file changes the reulting html is updated.

When we specify a file, like in

> gm -s some/folder/file.md

the served folder is some/folder/ and the requested url is localhost:8080/file.md (if 8080 is available).

Use gm to produce a GitLab pages website

Here is an example of possible .gitlab-ci.yml:

pages:
  image: alpine
  script:
    - wget -c https://github.com/kpym/gm/releases/download/v0.18.3/gm_0.18.3_Linux_64bit.tar.gz -O - | tar -C /usr/local/bin -xz gm
    - gm --pages '**/*'
  artifacts:
    paths:
      - public