first commit

LICENSE

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+Copyright (C) 2017 by Patrick Stadler
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

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+# ticker.sh
+
+> Real-time stock tickers from the command-line.
+
+`ticker.sh` is a simple shell script using the Yahoo Finance API as a data source. It features colored output and is able to display pre- and post-market prices.
+
+![ticker.sh](https://raw.githubusercontent.com/pstadler/ticker.sh/master/screenshot.png)
+
+## Install
+
+```sh
+$ curl -o ticker.sh https://raw.githubusercontent.com/pstadler/ticker.sh/master/ticker.sh
+```
+
+Make sure to install [jq](https://stedolan.github.io/jq/), a versatile command-line JSON processor.
+
+## Usage
+
+```sh
+# Single symbol:
+$ ./ticker.sh AAPL
+
+# Multiple symbols:
+$ ./ticker.sh AAPL MSFT GOOG BTCUSD=X
+
+# Read from file:
+$ echo "AAPL MSFT GOOG BTCUSD=X" > ~/.ticker.conf
+$ ./ticker.sh $(cat ~/.ticker.conf)
+
+# Update every five seconds:
+$ while true; do clear; ./ticker.sh AAPL MSFT GOOG BTCUSD=X; sleep 5; done
+```
+
+This script works well with [GeekTool](https://www.tynsoe.org/v2/geektool/) and similar software.

ticker.sh

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+#!/bin/sh
+set -e
+
+SYMBOLS=("$@")
+
+if ! $(type jq > /dev/null 2>&1); then
+  echo "'jq' is not in the PATH. (See: https://stedolan.github.io/jq/)"
+  exit 1
+fi
+
+if [ -z "$SYMBOLS" ]; then
+  echo "Usage: ./ticker.sh AAPL MSFT GOOG BTCUSD=X"
+  exit
+fi
+
+FIELDS=(symbol marketState regularMarketPrice regularMarketChange regularMarketChangePercent \
+  preMarketPrice preMarketChange preMarketChangePercent postMarketPrice postMarketChange postMarketChangePercent)
+API_ENDPOINT="https://query1.finance.yahoo.com/v7/finance/quote?lang=en-US&region=US&corsDomain=finance.yahoo.com"
+
+COLOR_BOLD='\e[1;37m'
+COLOR_GREEN='\e[32m'
+COLOR_RED='\e[31m'
+COLOR_RESET='\e[00m'
+
+symbols=$(IFS=,; echo "${SYMBOLS[*]}")
+fields=$(IFS=,; echo "${FIELDS[*]}")
+
+results=$(curl --silent "$API_ENDPOINT&fields=$fields&symbols=$symbols" \
+  | jq '.quoteResponse .result')
+
+query () {
+  echo $results | jq -r ".[] | select (.symbol == \"$1\") | .$2"
+}
+
+for symbol in $(IFS=' '; echo "${SYMBOLS[*]}"); do
+  if [ -z "$(query $symbol 'marketState')" ]; then
+    printf 'No results for symbol "%s"\n' $symbol
+    continue
+  fi
+
+  if [ $(query $symbol 'marketState') == "PRE" ] \
+    && [ "$(query $symbol 'preMarketChange')" != "0" ] \
+    && [ "$(query $symbol 'preMarketChange')" != "null" ]; then
+    nonRegularMarketSign='*'
+    price=$(query $symbol 'preMarketPrice')
+    diff=$(query $symbol 'preMarketChange')
+    percent=$(query $symbol 'preMarketChangePercent')
+  elif [ $(query $symbol 'marketState') != "REGULAR" ] \
+    && [ "$(query $symbol 'postMarketChange')" != "0" ] \
+    && [ "$(query $symbol 'postMarketChange')" != "null" ]; then
+    nonRegularMarketSign='*'
+    price=$(query $symbol 'postMarketPrice')
+    diff=$(query $symbol 'postMarketChange')
+    percent=$(query $symbol 'postMarketChangePercent')
+  else
+    nonRegularMarketSign=''
+    price=$(query $symbol 'regularMarketPrice')
+    diff=$(query $symbol 'regularMarketChange')
+    percent=$(query $symbol 'regularMarketChangePercent')
+  fi
+
+  if [ "$diff" == "0" ]; then
+    color=
+  elif ( echo "$diff" | grep -q ^- ); then
+    color=$COLOR_RED
+  else
+    color=$COLOR_GREEN
+  fi
+
+  printf "%-10s$COLOR_BOLD%7.2f$COLOR_RESET" $symbol $price
+  printf "$color%10.2f%12s$COLOR_RESET" $diff $(printf "(%.2f%%)" $percent)
+  printf " %s\n" "$nonRegularMarketSign"
+done