Parse transaction metadata

[noahfrederick]

Transaction notes may contain tags, which should be parsed:

https://www.ledger-cli.org/3.0/doc/ledger3.html#Metadata

Simple Tag

2020-12-02 Market  ; :Tag:
    Expenses:Food:Groceries

Tagged Posting

2020-12-02 Market
    Expenses:Food:Groceries
        ; :Tag:

Multiple Tags

2020-12-02 Market  ; :Tag1:Tag2:
    Expenses:Food:Groceries

Tags with Values

2020-12-02 Market
    ; Tag1: Value 1
    ; Tag2: Value 2
    Expenses:Food:Groceries

Tags with Typed Values

2020-12-02 Market
    ; Count:: 10
    ; SomeDate:: [1999-12-02]
    Expenses:Food:Groceries

[afh]

Auxiliary / effective dates can also be specified in a posting's metadata, e.g. ; [=2009/03/01] (see section on Effective Dates in the Ledger manual):

2008/10/16 * (2090) Bountiful Blessings Farm
    Expenses:Food:Groceries                  $ 37.50  ; [=2008/10/01]
    Expenses:Food:Groceries                  $ 37.50  ; [=2008/11/01]
    Expenses:Food:Groceries                  $ 37.50  ; [=2008/12/01]
    Expenses:Food:Groceries                  $ 37.50  ; [=2009/01/01]
    Expenses:Food:Groceries                  $ 37.50  ; [=2009/02/01]
    Expenses:Food:Groceries                  $ 37.50  ; [=2009/03/01]
    Assets:Checking

[cbarrete]

From what I remember looking at this when this issue was raised, this is likely to require an external scanner to cover all cases and I have not gotten around to writing one, especially since that's not a very useful feature to me.