Validate your Jinja Templates with j2lint

Jinja Tip: Validate and check your Jinja templates for syntax errors with j2lint. Ideal for integrating into a CI pipeline.

➜ https://github.com/aristanetworks/j2lint

Here is an example below 👇

$ uv tool install j2lint

$ cat config.j2
hostname
{%for int in interfaces%}
interface 
 ip address {{int.ip}} {{int.NetMask}}
{%endfor

$ j2lint config.j2
───────────────────────────────────────────────
JINJA2 LINT ERRORS
───────────────────────────────────────────────
config.j2
├── config.j2:1 A single space should be added
│   between Jinja2 curly brackets and a variable
│   name: {{ ethernet_interface }} (single-space...
├── config.j2:2 Jinja statement should have at
│   least a single space after '{%' and a single
│   space before '%}' (jinja-statements-single-...
├── config.j2:3 A single space should be added
│   between Jinja2 curly brackets and a variable
│   name: {{ ethernet_interface }} (single-space...
├── config.j2:4 unexpected '}' (jinja-syntax-error)
└── config.j2:4 A single space should be added
    between Jinja2 curly brackets and a variable
    name: {{ ethernet_interface }} (single-space...
Jinja2 linting finished with 5 error(s) and 0 warning(s)