A CLI for templating files into other files. No external dependencies required.

• Usage
  • Example
  • Template Syntax
• Disclaimers
  • TODOs

Motivation

snipfile was designed to help you stop copy-&-pasting un-tested code snippets into your professional work.

Fix your:

• Outdated examples
• Broken demos
• Busted blog posts
• Stale documentation
• Un-tested slide decks
• What other use-cases are there?

You can achieve testable code snippets by separating your code from your content.

pip install snipfile

Usage

snipfile --help

Example

1. Embed the template syntax within a file.

   • posts/thing.md

     Checkout this code snippet!
     
         ```python
         --8<-- code/foo.py  
         ```

   • The filepath is relative where you run snipfile (usually the root of your project).

2. Make sure the file to-be-templated exists. This file can be unit-tested as normal.

   • code/foo.py

     class Foo:
         def __init__(self, bar: int) -> None:
             self.bar = bar

3. Run snipfile anytime your code changes so that your documentation is always up-to-date.

   • A CLI tool snipfile is installed automatically.

     snipfile --input-dir=posts --output-dir=site --pattern=**/*.md

4. Profit

   • site/posts/thing.md

     Checkout this code snippet!
       
         ```python
         class Foo:
             def __init__(self, bar: int) -> None:
                 self.bar = bar
         ```

Template Syntax

The syntax is a space delimited set of arguments.

--8<-- <filepath> <startline> <endline>

• --8<-- The template syntax, used to identify which line you want to replace.
• <filepath>: (str) a filepath relative to the call to snipfile. This is the file you want to inject into the document.
• <startline> <endline>: Optional (int) these integers mark the start and/or end line to read from the snipped file provided in the <filepath>.

Some examples:

• Inject lines 2-3 from filename.txt.

  • --8<-- filename.txt 2 3

• Inject all but the first line from filename.md

  • --8<-- filename.md 1

• Inject all by the last line from filename.csv

  • --8<-- filename.csv -1

Notes:

• Extra spaces between the arguments are ignored.

Disclaimers

• This repo was mostly created to help practice some software design patterns for enabling unit testing the file system without mocks. But I'm happy to respond to bug/feature requests.
• Template syntax (--8<--) taken from pymdown-extensions.

TODOs

• Configurable base path.
• Finish support for templating certain line ranges.
• Preserve whitespace so that templating can preserve indented semantics (lists, etc.).
• Expose Python API as well as a CLI.