GitLab provides syntax highlighting on all files through the Rouge Ruby gem. It attempts to guess what language to use based on the file extension, which most of the time is sufficient.
If GitLab is guessing wrong, you can override its choice of language using the
gitlab-language attribute in
.gitattributes. For example, if you are working in a Prolog
project and using the
.pl file extension (which would normally be highlighted as Perl),
you can add the following to your
When you check in and push that change, all
*.pl files in your project are highlighted as Prolog.
The paths here are Git’s built-in
.gitattributes interface. So, if you were to invent a file format called a
Nicefile at the root of your project that used Ruby syntax, all you need is:
To disable highlighting entirely, use
gitlab-language=text. Lots more fun shenanigans are available through common gateway interface (CGI) options, such as:
# json with erb in it /my-cool-file gitlab-language=erb?parent=json # an entire file of highlighting errors! /other-file gitlab-language=text?token=Error
These configurations only take effect when the
file is in your default branch.
You can configure the maximum size of the file to be highlighted.
The file size is measured in kilobytes, and is set to a default of
512 KB. Any file over the file size is rendered in plain text.
Add this section, replacing
maximum_text_highlight_size_kilobyteswith the value you want.
gitlab: extra: ## Maximum file size for syntax highlighting ## https://docs.gitlab.com/ee/user/project/highlighting.html maximum_text_highlight_size_kilobytes: 512