Shell command output to telegram

tg.sh

#!/bin/bash
#
# Requirement: jq curl
# Only support input not parameters
#

API_HOST=api.telegram.org
TOKEN=114514:abc123
CHAT_ID=1919810

for c in jq curl; do
  if ! command -v $c >/dev/null 2>&1; then
    echo "Error: $c is not installed." >&2
    exit 1
  fi
done

IFS='' read -srd '' result
[ ! "$result" ] && result=Done || echo -n "$result"
text=$(echo -e "$(whoami)@$(uname -n):\n<pre>$(echo -n "$result" | sed 's/&/\&amp;/g; s/</\&lt;/g; s/>/\&gt;/g')</pre>" | jq -Rs .)
curl -fsSL -o /dev/null -m 10 -X POST \
     -H 'Content-Type: application/json' \
     -d "{\"chat_id\": \"$CHAT_ID\", \"text\": $text, \"parse_mode\": \"HTML\", \"link_preview_options\": {\"is_disabled\": true}}" \
     https://$API_HOST/bot$TOKEN/sendMessage