make rules and short symbols setup for market-prices.py (https://github.com/barrucadu/hledger-scripts#market-prices)

1-Makefile

YEAR:=$(shell date +%Y)
PRICES=$(YEAR).prices

# Fetch latest market prices, add P records to prices file.
MARKET_PRICES=~/src/PLAINTEXTACCOUNTING/hledger-scripts/market-prices/market-prices.py <market-prices.json

.PHONY: prices prices-dry
prices-dry:
	@$(MARKET_PRICES)

prices:
	@$(MARKET_PRICES) >>$(PRICES)

2-market-prices.json

{ "commodities":
  { "BTC":   { "provider": "coinbase" }
  , "ETH":   { "provider": "coinbase" }
  , "E":     { "base": "EUR", "provider": "ft_currency" }
  , "P":     { "base": "GBP", "provider": "ft_currency" }
  , "Y":     { "base": "JPY", "provider": "ft_currency" }
  }
, "symbols": 
  { "USD": "$" 
  }
}

3-example.txt

$ make prices-dry
P 2019-03-08 BTC $3891.995
P 2019-03-08 ETH $137.005
P 2019-03-08 E $1.1242
P 2019-03-08 P $1.3014
P 2019-03-08 Y $0.009