How to set custom theme to external url with marp-cli

[SoumayaMauthoorMOJ]

marp-vscode allows you to specify both relative paths and remote URLs as custom themes (see here):

// Please put `.vscode/settings.json` on your workspace
{
  "markdown.marp.themes": [
    "https://example.com/foo/bar/custom-theme.css",
    "./themes/your-theme.css"
  ]
}

marp-cli allows you to specify a relative path to a custom theme (see here:

marp --theme custom-theme.css

I've tried passing an external url e.g. through jsdeliver but no luck. Do I need to download the css file first, for example as part of a GitHub action?

[yhatt]

Yes, you should download the theme from remote before.

wget https://example.com/foo/bar/custom-theme.css
marp --theme custom-theme.css

Marp for VS Code allows remote URL in markdown.marp.themes setting that have compatibillity with custom style settings markdown.styles for VS Code Markdown preview, but Marp CLI does not allow passing themes as external URL.

Please note that Marp team is not leading implementation about this function, to make CLI secure by reducing remote access capabilities. However, the pull request from the community has been reviewed and in progress.

• --theme can not be a URL marp-cli#183
• Fix: Add ability to reference external themes (closes #183) marp-cli#571

[SoumayaMauthoorMOJ]

Thanks!