Include file relative to processed markdown file

[neurobin]

This is a nice idea mentioned at cmacmackin/markdown-include#7
by @kamar535

It would be great if there was an option to include a file relative to the markdown file being processed.

For example if we have the following directory structure.

├── a.md
└── sub
    ├── b.md
    └── c.md

To include c.md from b.md someting simlar to {!./c.md!} could be used. To include a.md from b.md something similar to {!../a.md!} could be used.

[neurobin]

recursive_relative_path can be set to True to achieve this in latest version.

[Rajith90]

I have used this with mkdocs and I have included the extension as below in mkdocs.yaml file

    - mdx_include:
          recursive_relative_path: true

But it does not give the expected behaviour explained in this issue.
I have following structure

├── test
└── sample
    ├── b.md
    └── c.md

I have included the b.md file in the c.md file as below

{!./b.md!}

It gives the following error

ERROR:mdx_include-1.3.1:E: Could not find file: b.md
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/mdx_include/mdx_include.py", line 75, in get_local_content_list
    with open(filename, 'r', encoding=encoding) as f:
  File "/usr/local/Cellar/python@3.8/3.8.5/Frameworks/Python.framework/Versions/3.8/lib/python3.8/codecs.py", line 905, in open
    file = builtins.open(filename, mode, buffering)
FileNotFoundError: [Errno 2] No such file or directory: b.md

[neurobin]

Did u try using it without ./ i.e simply {!b.md!}

[roboteacher1]

I ran into the same issue. It seems recursive_relative_path only works for an indirectly included file. Including a file directly from any of the .md files in the documentation always uses the base path, no way to use a relative path from that .md file. Simple example:

├── mkdocs.yml
└── docs
    ├── index.md
    └── b.txt
    └── c.txt

mkdocs.yml:

site_name: MkLorum
nav:
    - Home: index.md
markdown_extensions:
  - mdx_include:
        recursive_relative_path: true

index.md:

# This is a test header

{!docs/b.txt!}

{!b.txt!}

b.txt:

B is included

{!c.txt!}

c.txt:

This is from C!

With this example, {!docs/b.txt!} works from index.md, but {!b.txt!} results in a FileNotFoundError "b.txt". Including {!c.txt!} from b.txt works as it is an indirect include (included from a file that was itself included).