Imprime índices econômicos direto no terminal. Compatibilidade POSIX: testado em sh, bash e zsh.

indices.sh

#!/bin/bash
#
# indices.sh - version 1.5 - 08/01/2025
# Copyright (c) 2024, 2025 Daniel Dias Rodrigues <[email protected]>. No
# rights reserved.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the Creative Commons Zero 1.0 Universal (CC0 1.0) Public
# Domain Dedication (https://creativecommons.org/publicdomain/zero/1.0/).
#
URL_DOLAR="http://www.yahii.com.br/dolardiario"
URL_EURO="http://www.yahii.com.br/eurodiario"
URL_OURO="https://pt.bullion-rates.com/gold/BRL-history.htm"
URL_BTC="https://www.infomoney.com.br/cotacoes/cripto/ativo/bitcoin-btc"
URL_DOLAR_REALTIME="https://www.xe.com/currencyconverter/convert/?Amount=1&From=USD&To=BRL"
URL_EURO_REALTIME="https://www.xe.com/currencyconverter/convert/?Amount=1&From=EUR&To=BRL"

_validContent(){
    local CONTENT="$(wget -qO- $1$(date +%y).html)"
    local CURRENT=""

    local COUNT=0
    while [ -z "$CURRENT" ]; do
        COUNT=$(($COUNT + 1))
        DATE=$(date --date="$(date +%F) -$COUNT day" +%x)
        YEAR=$(echo "$DATE" | cut -c 7-10)  # Extrai os 4 primeiros caracteres do ano
        if [ "$YEAR" -eq "$(($(date +%Y) - 1))" ]; then
            CONTENT="$(wget -qO- $1$(($(date +%y)-1)).html)"
        fi
        CURRENT=$(echo "$CONTENT" | grep "$DATE" -A2)
    done
    
    if [ -z "$DATE" ]; then
        DATE=$(date +%x)
    fi

    COIN=$(echo "$CURRENT" | tail -2 | sed 's/ //g' | sed 's/<.*=2>//g' | sed 's/<.*//g')
    COINc=$(echo "$COIN" | head -1)
    COINv=$(echo "$COIN" | tail -1)
    
    echo "$DATE $COINc $COINv"
}

USD=$(_validContent "$URL_DOLAR")
USD_DATE=$(echo "$USD" | cut -d' ' -f1)
USD_BUY=$(echo "$USD" | cut -d' ' -f2)
USD_SELL=$(echo "$USD" | cut -d' ' -f3)

EURO=$(_validContent "$URL_EURO")
EURO_DATE=$(echo "$EURO" | cut -d' ' -f1)
EURO_BUY=$(echo "$EURO" | cut -d' ' -f2)
EURO_SELL=$(echo "$EURO" | cut -d' ' -f3)

GOLD_CONTENT="$(wget -qO- $URL_OURO)"
GOLD_CURRENT="$(echo "$GOLD_CONTENT" | grep "$(date +%d/%m/%y)" -A2)"
while [ -z "$GOLD_CURRENT"  ]; do
    COUNT=$(($COUNT + 1))
    GOLD_DATE=$(date --date="$(date +%F) -$COUNT day" +%d/%m/%y)
    GOLD_CURRENT=$(echo "$GOLD_CONTENT" | grep "$GOLD_DATE" -A2)
done
if [ -z "$GOLD_DATE" ]; then
    GOLD_DATE=$(date +%x)
else
    GOLD_DATE=$(echo "$GOLD_DATE" | sed -r 's/(.{6})/\120/')
fi
GOLD_clear=$(echo "$GOLD_CURRENT" | tail -2 | sed -e 's/ //g' -e 's/<.*\">//g' -e 's/<.*//g')
GOLDg=$(echo "$GOLD_clear" | head -1)
GOLDoz=$(echo "$GOLD_clear" | tail -1)

# Current values
btc_section=$(wget -qO- "$URL_BTC" | rg -A21 'Atualizado' | tr -s ' ' | tr '\n' ' ')
btc=$(echo $btc_section | sed -r -e 's/.*<div class="value">([^div]*)<\/div>.*/\1/g' -e 's/[^[:digit:],\.]//g')

usd=$(wget -qO- "$URL_DOLAR_REALTIME" | grep "1.00 US Dollar =" \
    | sed -re "s/.*1.00 US Dollar =(.{70}).*/\1/g" -e 's/<[^>]*>?//g' -e 's/\./,/')

eur=$(wget -qO- "$URL_EURO_REALTIME" | grep "1.00 Euro =" \
    | sed -re "s/.*1.00 Euro =(.{70}).*/\1/g" -e 's/<[^>]*>?//g' -e 's/\./,/')

echo "Valores históricos
==================

Dólar comercial¹      | Euro¹                 | Ouro²
    (${USD_DATE})      |     (${EURO_DATE})      |     (${GOLD_DATE})
    Compra R$ ${USD_BUY}  |     Compra R$ ${EURO_BUY}  |     R$    ${GOLDg}/g
    Venda  R$ ${USD_SELL}  |     Venda  R$ ${EURO_SELL}  |     R$ ${GOLDoz},00/oz

Valores correntes
=================
    1,00 USD³ = R$ ${usd}
    1,00 EUR³ = R$ ${eur}
    1,00 BTC⁴ = R$ ${btc}

Fontes:
 ¹ yahii.com.br/Indices.html
 ² pt.bullion-rates.com/gold/BRL-history.htm
 ³ xe.com
 ⁴ infomoney.com.br/cotacoes/cripto/ativo/bitcoin-btc"