Tool to add code highlighting and export to HTML

(setq org-html-htmlize-output-type `nil)

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<pre class="src src-emacs-lisp">(<span style="color: #a020f0;">defcustom</span> <span style="color: #a0522d;">org-html-htmlize-output-type</span> 'inline-css
  <span style="color: #8b2252;">"Output type to be used by htmlize when formatting code snippets.</span>
<span style="color: #8b2252;">Choices are `</span><span style="color: #008b8b;">css</span><span style="color: #8b2252;">' to export the CSS selectors only,`</span><span style="color: #008b8b;">inline-css</span><span style="color: #8b2252;">'</span>
<span style="color: #8b2252;">to export the CSS attribute values inline in the HTML or `</span><span style="color: #008b8b;">nil</span><span style="color: #8b2252;">' to</span>
<span style="color: #8b2252;">export plain text.  We use as default `</span><span style="color: #008b8b;">inline-css</span><span style="color: #8b2252;">', in order to</span>
<span style="color: #8b2252;">make the resulting HTML self-containing.</span>

<span style="color: #8b2252;">However, this will fail when using Emacs in batch mode for export, because</span>
<span style="color: #8b2252;">then no rich font definitions are in place.  It will also not be good if</span>
<span style="color: #8b2252;">people with different Emacs setup contribute HTML files to a website,</span>
<span style="color: #8b2252;">because the fonts will represent the individual setups.  In these cases,</span>
<span style="color: #8b2252;">it is much better to let Org/Htmlize assign classes only, and to use</span>
<span style="color: #8b2252;">a style file to define the look of these classes.</span>
<span style="color: #8b2252;">To get a start for your css file, start Emacs session and make sure that</span>
<span style="color: #8b2252;">all the faces you are interested in are defined, for example by loading files</span>
<span style="color: #8b2252;">in all modes you want.  Then, use the command</span>
<span style="color: #8b2252;">`\\[</span><span style="color: #008b8b;">org-html-htmlize-generate-css</span><span style="color: #8b2252;">]' to extract class definitions."</span>
  <span style="color: #483d8b;">:group</span> 'org-export-html
  <span style="color: #483d8b;">:type</span> '(choice (const css) (const inline-css) (const nil)))

(<span style="color: #a020f0;">defcustom</span> <span style="color: #a0522d;">org-html-htmlize-font-prefix</span> <span style="color: #8b2252;">"org-"</span>
  <span style="color: #8b2252;">"The prefix for CSS class names for htmlize font specifications."</span>
  <span style="color: #483d8b;">:group</span> 'org-export-html
  <span style="color: #483d8b;">:type</span> 'string)
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<pre class="src src-emacs-lisp">(defcustom org-html-htmlize-output-type 'inline-css
  "Output type to be used by htmlize when formatting code snippets.
Choices are `css' to export the CSS selectors only,`inline-css'
to export the CSS attribute values inline in the HTML or `nil' to
export plain text.  We use as default `inline-css', in order to
make the resulting HTML self-containing.

However, this will fail when using Emacs in batch mode for export, because
then no rich font definitions are in place.  It will also not be good if
people with different Emacs setup contribute HTML files to a website,
because the fonts will represent the individual setups.  In these cases,
it is much better to let Org/Htmlize assign classes only, and to use
a style file to define the look of these classes.
To get a start for your css file, start Emacs session and make sure that
all the faces you are interested in are defined, for example by loading files
in all modes you want.  Then, use the command
`\\[org-html-htmlize-generate-css]' to extract class definitions."
  :group 'org-export-html
  :type '(choice (const css) (const inline-css) (const nil)))

(defcustom org-html-htmlize-font-prefix "org-"
  "The prefix for CSS class names for htmlize font specifications."
  :group 'org-export-html
  :type 'string)
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