Internal links don't work on ODT writer

[josineto]

When I convert from markdown to ODT all the internal links (to headings) get broken. Example: using the following markdown file (named test.md):

# Heading {#foo}

Text with a reference to [Heading](#foo)

And the command below (pandoc 2.1.1):

pandoc -s -t odt test.md -o test.odt

Gives me an ODT file without the internal link. Looking inside the file, in content.xml, I found this:

<text:h text:style-name="Heading_20_1" text:outline-level="1">Heading</text:h>
<text:p text:style-name="First_20_paragraph">Text with a reference to <text:a xlink:type="simple" xlink:href="#foo" office:name="">
    <text:span text:style-name="Definition">Heading</text:span>
  </text:a>
</text:p>

Pandoc is not creating the anchor on the Heading, so any link points to nothing. The correct link would be something like this:

<text:h text:style-name="Heading_20_1" text:outline-level="1">
  <text:bookmark-start text:name="foo"/>Heading<text:bookmark-end text:name="foo"/>
</text:h>
<text:p text:style-name="First_20_paragraph">Text with a reference to <text:a xlink:type="simple" xlink:href="#foo" office:name="">
    <text:span text:style-name="Definition">Heading</text:span>
  </text:a>
</text:p>

To temporarily address this, I've written a Lua filter, that corrects the links using RawInline elements with format opendocument (as suggested by @jgm in this discussion ). But I think internal links are a common feature that needs to work in ODT "natively", without filters.

I've searched in pandoc-discuss and the issues, but it seems that there isn't much discussion about this.

[josineto]

Here goes the code of my Lua filter, if it helps.

local function getBookmarkById(id)
  local bookmarkStart = '<text:bookmark-start text:name=\"' .. id .. '\"/>'
  local bookmarkEnd = '<text:bookmark-end text:name=\"' .. id .. '\"/>'
  return bookmarkStart, bookmarkEnd
end

local function putMarksOnContent(textContent, id)
  local markStart, markEnd = getBookmarkById(id)
  local newContent = {}

  table.insert(newContent, pandoc.RawInline("opendocument", markStart))
  for i,el in pairs(textContent) do
    table.insert(newContent, el)
  end
  table.insert(newContent, pandoc.RawInline("opendocument", markEnd))
  return newContent
end

function Header (hx)
  if FORMAT == 'odt' then
    hx.content = putMarksOnContent(hx.content, hx.attr.identifier)
  end
  return hx
end

[josineto]

I've added a repository with some lua filters that workaround problems in ODT writer. Internal links are treated by odt-anchors.lua (it's almost exactly the same filter I put here). But that's a workaround, it would be very nice if that wasn't even necessary.

[josineto]

Any points here?