YAML metadata?

[thejohnfreeman]

The metadata supported is not complete YAML. It does not handle lists spanning multiple lines:

entries:
- one
- two
- three

The error:

unexpected "\n"
expecting space followed by metadata for: entries

I got the feeling the metadata parser is something custom written for Hakyll. Would it be possible to just use a general YAML parser?

In my particular case, I have about 7 entries, each with multiple fields, that I use to conveniently generate a portion of my page. It's going to look ugly and unmaintainable if consolidated to a single line.

[dikmax]

It is indeed. And I don't think this behavior will be updated at least until next major version.

BTW, we could use Front-matter parser included in new Pandoc.

[jaspervdj]

Makes sense. Pandoc will need to export the metadata parsing API though (I don't think it currently does).

[dikmax]

I think we could use whole document parsing API. readMarkdown returns Pandoc, which contains Meta field. This field contains all required information.

http://hackage.haskell.org/package/pandoc-types-1.12.3.2/docs/Text-Pandoc-Definition.html#t:Pandoc

[nagisa]

Not all documents that use metadata are parsed with pandoc now. If we parse all documents with pandoc just to get metadata, that's going to be wasteful.

We also must have a capability to retrieve source document body without the metadata. Not sure if pandoc allows that. On Feb 24, 2014 12:19 PM, "Maxim Dikun" notifications@github.com wrote:

I think we could use whole document parsing API. readMarkdown returns Pandoc, which contains Meta field. This field contains all required information.

— Reply to this email directly or view it on GitHubhttps://github.com/jaspervdj/hakyll/issues/225#issuecomment-35872951 .

[dikmax]

Ok. Pandoc uses yaml library for parsing. We could use it too.

[thejohnfreeman]

What's the schedule for the next major version? In the mean time, I could implement my own Hakyll.Core.Compiler to do this, correct?

[co-dan]

+1 for full Yaml support :)

[jaspervdj]

@thejohnfreeman I'll try to target it for next month. Yes, you should be able to do so!

[co-dan]

Do you think it would be possible to include the yaml-parsing feature in the next release? That is, do we have enough time?

On Tue, Feb 25, 2014 at 1:35 PM, Jasper Van der Jeugt < notifications@github.com> wrote:

@thejohnfreeman https://github.com/thejohnfreeman I'll try to target it for next month. Yes, you should be able to do so!

Reply to this email directly or view it on GitHubhttps://github.com/jaspervdj/hakyll/issues/225#issuecomment-35989974 .

Sincerely yours, -- Daniil

[jaspervdj]

I want to release a version this week and it's not going in there, it'll be in the one after that.

[xiaohanyu]

+1

[LeviSchuck]

It would be nice when this does get in.

[FranklinChen]

I just ran across this incompletely YAML support also, when attempting to start migrating an Octopress-based site to Hakyll.

[jmatsushita]

+1 for this. Trying to migrate from metalsmith with YAML frontmatters as well!

[gpampara]

+1 Just hit this issue as well. Would be great to get this corrected

[vjeranc]

Would fixing this enable easier references (without bib and csl files -- assuming we are fine with the defaults) using YAML metadata as described here?

[hazybluedot]

+1 just ran into this trying to port my blog over from nanoc!

[justinmanley]

+1 Full YAML front-matter support would be great!

[jaspervdj]

Hakyll 4.8.0.0 turns Metadata into a YAML object.

[thejohnfreeman]

Perfect timing! Just last week I returned to Hakyll after more studiously learning Haskell over the previous months, with the intention of addressing this issue.

[beerendlauwers]

Stellar. This was a long-standing issue that made Hakyll a hard sell to some clients and managers. Thank you so much for fixing it!