How to change Markdown link relative path as preprocessing of gatsby-transformer-remark

Question

I am developping a static blog using Gatsby. It use gatsby-transformer-remark and gatsby-plugin-i18n plugin to support multiple languages.

I am managing the articles in the GitHub repository as follows.

• /blog
  • /2017
    • /06
      • 01-foo.en.md
      • 01-foo.zh.md
    • /09
      • 01-bar.en.md
      • 01-bar.zh.md

And links between the articles is necessary. Therefore, in order not to become a dead link when looking at GitHub with a Web browser, we set up a link as follows.

[link](/blog/2017/09/01-bar.en.md)

However, this has the problem of dead linking when displayed using Gatsby. Because the URL in the actually generated browser is as follows.

/[gatsby-config.pathPrefix]/en/blog/2017/09/01-bar

So, when I run gatsby build or gatsby develop, I want to replace links between articles using regular-expressions, as preprocessing to analyze Markdown by gatsby-transformer-remark.

How can I do the above?

---

Added: Feb, 2

I also tried relative links.

[link](../09/01-bar)

But the URL is /[gatsby-config.pathPrefix]/en/blog/2017/06/09/01-bar, which is dead link. Because Gatsby makes HTML place to /[gatsby-config.pathPrefix]/en/blog/2017/06/09/01-bar/index.html.

So I added ../ once more. And it worked. However, this has some problems.

• I can not navigate from Markdown in GitHub to another Markdown. Because the relative path is different.
• In addition, it cannot navigate without adding language suffix (e.g. 01-bar.en.md), but when I add it, Gatsby cannot be recognized this time and 404 or raw Markdown are displayed.