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Is it possible for markdown export to link to other files?

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I exported a notebook to markdown (which is great), but I found that the files don't have links to other files like they were in Siyuan.

So, is there anyway to make markdown exports have links to other files?

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    Is it possible for markdown export to link to other files?

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    • Siysuy •

      I noticed an issue with footnote mode posted Any export method not working (crash/freeze) app on setting -> Export -> Ref -> footnote

    • MiscReply
    • adham • • 1
      Author

      I was able to do it (for documents only, not blocks, as I don't know how to find out if the link is of a block or a document, and I don't want to mutate the linked documents anyway).

      Here's the Python script:

      import os
import re
import requests

# Replace 'YOUR_API_ENDPOINT' with the actual Siyuan API endpoint
SIYUAN_API_ENDPOINT = "http://localhost:6806"


# Function to make a SQL query to Siyuan API
def query_block_details(block_id):
    query = {"stmt": f"SELECT * FROM blocks WHERE id='{block_id}'"}
    response = requests.post(f"{SIYUAN_API_ENDPOINT}/api/query/sql", json=query)
    return response.json()


# Function to process each markdown file
def process_markdown_file(file_path):
    with open(file_path, "r", encoding="utf-8") as file:
        content = file.read()

        # Use regex to find instances of [Anchor text](siyuan://blocks/block-id)
        matches = re.findall(r"\[.*?\]\(siyuan://blocks/(.*?)\)", content)

        for block_id in matches:
            # Query Siyuan API to get block details
            result = query_block_details(block_id)

            # Assumes ref is of a document, not a block
            if result:
                hpath_value = result["data"][0].get("hpath")

                # Replace the siyuan://blocks/block-id with hpath_value.md
                new_link = f"({hpath_value}.md)"

                # Replace the old link in the content
                content = content.replace(f"(siyuan://blocks/{block_id})", new_link)

    # Write the updated content back to the file
    with open(file_path, "w", encoding="utf-8") as file:
        file.write(content)


def process_markdown_directory(directory_path):
    for root, _, files in os.walk(directory_path):
        for file_name in files:
            if file_name.endswith(".md"):
                file_path = os.path.join(root, file_name)
                process_markdown_file(file_path)


# Replace 'YOUR_MARKDOWN_DIRECTORY_PATH' with the actual path to your exported markdown files
markdown_directory_path = "YOUR_MARKDOWN_DIRECTORY_PATH"

# Process each markdown file in the specified path
process_markdown_directory(markdown_directory_path)
    • sagar • • 2
      VIP Warrior

      I think there is a fairly simple solution to this, which I will describe below. I think it can be implemented as a simple Python script that does some post-processing of the exported markdown files. I will try to create a proof-of-concept script, but it will take me a few days because I am not a programmer and will need to learn some Python programming first.

      Solution description

      1. In Settings > Export configure 'Ref' to 'Anchor text with block URL'. After doing this, a link to another block in a SiYuan note appears in the exported Markdown file as [Anchor text](siyuan://blocks/block-id).

      2. Write a Python script that opens each exported markdown file and uses regex matching to identify all instances of [Anchor text](siyuan://blocks/block-id). For each instance,

      3. Use the /api/query/sql API endpoint to get details of the block-id by making a query like:

        { "stmt": "SELECT * FROM blocks WHERE id='block-id'" }

      4. In the query result, you can find the hpath key whose value is a human readable path.

        1. If the block-id is for a block of type document (which would be the case for a link to another document), then the Python script just needs to replace siyuan://blocks/block-id with hpath_value.md which would be the relative path to the exported markdown file that the link points to.
        2. If the block-id is for a block inside a document (e.g. to some arbitrary paragraph block in the document), all you need to do is to open the exported markdown document containing that paragraph (from the value of hpath for that block-id), find the start of the paragraph and add an <a name="block-id"></a> anchor at the start of the paragraph. Then, the siyuan://blocks/block-id in the exported markdown file can be replaced by hpath_value.md#block-id

      This would basically solve the problem of having correct links in the exported markdown files and additionally the exported notes can easily be converted to HTML and published e.g. with a static site generator like Hugo.

      @88250 Do you see any problems with this approach? I don't understand why SiYuan does not do this already when exporting to markdown.. but in any case, a Python script that does the above can post-process the exported markdown files from SiYuan and fix all the links. What do you think?

      1 Reply
      1 Operate
      sagar updated this reply at 2023-12-01 08:25:07
    • Siysuy •

      The anchor hash feature currently creates a span object <span id="20231110120736-ze6m41f"></span>. Some kind of program should be able to understand and find this block inside the note as reference. Can anyone help me understand how this can be useful after export, where do I use this, which program understands this syntax?

      The export mode Anchor hash for notebook Markdown exporting has some limitations.

      In the case i want to publish a particular note (with links to other notes) my approach is:

      1. From main notebook export the notebook you want to publish to .sy.zip file
      2. Create new (temporary) notebook
      3. import .sy.zip file to new temp notebook
      4. Export temp notebook export it to any selectable format (only markdown is currently selectable)

      Other limitation of Anchor has export and the only way I got it to work (performed testing by exporting to Obsidian):

      • currently only works for notebook and does not allow nested notes. In the process of exporting all notes must be unnested inside notebook for .md export to function.
      • Currently does not support block reference. Can only link to main note. Tested by importing to obsidian (not a siyuan issue, but a markdown syntax limitation i presume)

      Depending on the responses here I might add a feature request soon that involves the concept of user selectable export syntax. In which before execution of export using anchor hash a user can type in the conversion syntax to apply. User is presented with input fields much like the settings > Export > Anchor text wrapping symbol fields.

      Conversion syntax for siyuan > obsidian would be: [[test3.md/Note 2#^d8bf62|Note 2]] and conversion input fields could somehow be [[ .. / .. #^ .. | .. ]]

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