migrate

Utilities for migrating to nbdev

Migrate notebooks


source

MigrateProc

 MigrateProc (nb)

Migrate fastpages front matter in notebooks to a raw cell.

Before you migrate the fastpages notebook, the front matter is specified in Markdown like this:

_tst_nb = '../../tests/2020-09-01-fastcore.ipynb'
print(read_nb(_tst_nb).cells[0].source)
# "fastcore: An Underrated Python Library"

> A unique python library that extends the python programming language and provides utilities that enhance productivity.
- author: "<a href='https://twitter.com/HamelHusain'>Hamel Husain</a>"
- toc: false
- image: images/copied_from_nb/fastcore_imgs/td.png
- comments: true
- search_exclude: true
- hide: true
- categories: [fastcore, fastai]
- permalink: /fastcore/
- badges: true

After migrating the notebook, the front matter is moved to a raw cell, and some of the fields are converted to be compliant with Quarto. Furthermore, aliases may be added in order to prevent broken links:

nbp = NBProcessor('../../tests/2020-09-01-fastcore.ipynb', procs=[FrontmatterProc, MigrateProc])
nbp.process()
_fm1 = _get_raw_fm(nbp.nb)
print(_fm1)
---
aliases:
- /fastcore/
author: <a href='https://twitter.com/HamelHusain'>Hamel Husain</a>
badges: true
categories:
- fastcore
- fastai
date: '2020-09-01'
description: A unique python library that extends the python programming language
  and provides utilities that enhance productivity.
draft: 'true'
image: fastcore_imgs/td.png
output-file: 2020-09-01-fastcore.html
permalink: /fastcore/
search: 'false'
title: 'fastcore: An Underrated Python Library'
toc: false

---

Migrate Fastpages Markdown Front Matter


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fp_md_fm

 fp_md_fm (path)

Make fastpages front matter in markdown files quarto compliant.

Here is what the front matter of a fastpages markdown post looks like before migration:

print(run('head -n13 ../../tests/2020-01-14-test-markdown-post.md'))
---

toc: true
layout: post
description: A minimal example of using markdown with fastpages.
categories: [markdown]
title: An Example Markdown Post


---

# Example Markdown Post

And this is what it looks like after migration:

_res = fp_md_fm('../../tests/2020-01-14-test-markdown-post.md')
print(_res[:300])
---
aliases:
- /markdown/2020/01/14/test-markdown-post
categories:
- markdown
date: '2020-01-14'
description: A minimal example of using markdown with fastpages.
layout: post
title: An Example Markdown Post
toc: true

---

# Example Markdown Post

## Basic setup

Jekyll requires blog post files to b
#hide
_res = fp_md_fm('../../tests/2022-09-06-homeschooling.md')
test_eq(_res,
"""---
aliases:
- /2022/09/06/homeschooling
author: Rachel Thomas
categories:
- advice
- health
date: '2022-09-06'
description: You can permanently damage your back, neck, and wrists from working without
  an ergonomic setup.  Learn how to create one for less at home.
image: /images/ergonomic1-short.jpg
summary: You can permanently damage your back, neck, and wrists from working without
  an ergonomic setup.  Learn how to create one for less at home.
tags: advice health
title: 'Essential Work-From-Home Advice: Cheap and Easy Ergonomic Setups'

---

Lorem ipsum
""")

Convert nbdev v1 projects to nbdev v2

Directives

nbdev v2 directives start with a #| whereas v1 directives were comments without a pipe |.

_test_dir = """
#default_exp
 #export
# collapse-show
#collapse-hide
#collapse
# collapse_output
not_dir='#export'
# hide_input
foo
# hide
"""
test_eq(_repl_directives(_test_dir),
"""
#| default_exp
#| export
#| code-fold: show
#| code-fold: true
#| code-fold: true
# collapse_output
not_dir='#export'
#| echo: false
foo
#| include: false
""")

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_repl_v1dir

 _repl_v1dir (cell)

Replace nbdev v1 with v2 directives.

for example, if any of the lines below are valid nbdev v1 directives, they replaced with a #|, but only before the first line of code:

Callouts

In fastpages, there was a markdown shortuct for callouts for Note, Tip, Important and Warning with block quotes (these only worked in notebooks). Since Quarto has its own callout blocks with markdown syntax, we do not implement these shortcuts in nbdev. Instead, we offer a manual conversion utility for these callouts so that you can migrate from fastpages to Quarto.


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_convert_callout

 _convert_callout (s)

Convert nbdev v1 to v2 callouts.

For example, the below markdown:

_callouts="""
## Boxes / Callouts

> Warning: There will be no second warning!

Other text

> Important: Pay attention! It's important.

> Tip: This is my tip.

> Note: Take note of `this.`
"""

Gets converted to:


## Boxes / Callouts

:::{.callout-warning}

There will be no second warning!

:::

Other text

:::{.callout-important}

Pay attention! It's important.

:::

Video Embeds

In fastpages, you could embed videos with a simple markdown shortcut involving a block quote with the prefix youtube:, that looked like this

> youtube: https://youtu.be/XfoYk_Z5AkI

However, in Quarto you can use the video extension to embed videos.


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_convert_video

 _convert_video (s)

Replace nbdev v1 with v2 video embeds.

_videos="""
## Videos

> youtube: https://youtu.be/XfoYk_Z5AkI
"""
print(_convert_video(_videos))

## Videos

{{< video https://youtu.be/XfoYk_Z5AkI >}}

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migrate_nb

 migrate_nb (path, overwrite=True)

Migrate Notebooks from nbdev v1 and fastpages.


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migrate_md

 migrate_md (path, overwrite=True)

Migrate Markdown Files from fastpages.


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nbdev_migrate

 nbdev_migrate (path:str=None, no_skip:bool=False)

Convert all markdown and notebook files in path from v1 to v2

Type Default Details
path str None A path or glob containing notebooks and markdown files to migrate
no_skip bool False Do not skip directories beginning with an underscore