Add optional config header to grammar

[cknadler]

marktab needs an optional header that allows you to configure miscellaneous parts of the tab.

Currently running with the idea preceding each config line with a #.

# strings: 7
# tuning: B E A D G b e

defaults:

# strings: 6
# tuning: E A D G B e

[cknadler]

Another idea for this would be to have bass and guitar modes for marktab to parse.

Type: bass would default to Strings: 4 and Tuning: E A D G.

[cknadler]

New take on this issue:

Config header should be YAML:

---
strings: 7
tuning: B E A D G b e
import: some_chords.mt
---

[russplaysguitar]

For easier parsing?

[cknadler]

Yes, and it stands out better, to me at least. The --- is pretty universally YAML while the # means comment in ruby. So, in the grammar, I changed --- to indicate a config header and # to be a comment. I'm going to remove the c-style comments as well.

[cknadler]

Adding a new config option:

line_length: 80 #default

That brings us to:

---
strings: 6
tuning: E A D G B e
import: stdlib.mt
line_length: 80
---

[cknadler]

For the first implementation of the parser, I have a few changes I want to make to the conf header.

Strings and Tuning

These two are redundant. By declaring what tuning you are using, you are inherently telling MarkTab how many strings have.

I think that removing the strings option altogether is the easiest.

Import

A stdlib of chords would be awesome, but slightly beyond the scope of the first implementation. For now, I'm leaving this out.

Revised Conf Options

tuning: E A D G B e
line_length:  80

Much simpler.

<3 <3 <3

[russplaysguitar]

:ok_hand: