Old update script for a Cosmos blockchain validator/node.

cosmos_update.sh

#!/bin/bash

CHAIN_DAEMON="terrad"

# Exit immediately if a command exits with a non-zero status.
set -e

# Define color-coded log functions with timestamps
cyan()  { printf '[%b] \e[1;36m%b\e[m\n' "$(date +%T)" "$1"; }
ok()    { printf '[%b] \e[32m%b\e[m\n' "$(date +%T)" "$1"; }
warn()  { printf '[%b] \e[1;33m%b\e[m\n' "$(date +%T)" "$1"; }
err()   { printf '[%b] \e[1;31m%b\e[m\n' "$(date +%T)" "$1" 1>&2; }

# Visual enhancements
divider() { printf '-%.0s' {1..30}; } # // https://stackoverflow.com/questions/5349718/how-can-i-repeat-a-character-in-bash
header() { divider; cyan "🔹 $1 🔹"; divider; }
footer() { divider; cyan "🔹 End of $1 🔹"; divider; echo; }

# OLD - Accepting a git tag/version as an optional argument
# OLD - VERSION=${1:-"v2.10.5"}

# Default values
DEFAULT_VERSION="v2.10.5"
VERSION="$DEFAULT_VERSION"
MONITOR=false
UPDATE_DEFAULT=false

# Argument parsing
while getopts "v:muh" opt; do
  case ${opt} in
    v ) VERSION=$OPTARG ;;
    m ) MONITOR=true ;;
    u ) UPDATE_DEFAULT=true ;;
    h ) echo "Usage: $(basename "$0") [-v version] [-m] [-h]"
        echo "  -v version : Specify the version to update to (default: $DEFAULT_VERSION)"
        echo "  -m         : Monitor the Terra Daemon's output after restarting"
        echo "  -u         : Update the script's default version without asking"
        echo "  -h         : Display this help message and exit"
        exit 0 ;;
    \? ) echo "Usage: $(basename "$0") [-v version] [-m] [-u] [-h]"
         exit 1 ;;
  esac
done

# Check if the specified version is different from the default and prompt for update
if [ "$VERSION" != "$DEFAULT_VERSION" ]; then
  if [ "$UPDATE_DEFAULT" = false ]; then
    read -p "You have specified a different version ($VERSION). Do you want to update the default version in the script? [y/N]: " confirm_update
  fi

  if [[ $confirm_update =~ ^[Yy]$ || "$UPDATE_DEFAULT" = true ]]; then
    sed -i "s/DEFAULT_VERSION=\"[^\"]*\"/DEFAULT_VERSION=\"$VERSION\"/" "$0"
    ok "Default version updated in the script."
  fi
fi

# Stopping the Daemon with more detailed logging
warn "Attempting to stop the Daemon..."
sudo systemctl stop $CHAIN_DAEMON
ok "-------- Daemon stopped successfully. 🛑 --------"

# Changing directory with error handling
warn "Changing directory to core..."
cd core || { err "Failed to change directory to core."; exit 1; }
ok "Changed directory to core. ↘️"

# Updating the repository and checking out the specified version with detailed logging
warn "Fetching updates from the origin..."
git fetch origin tag ${VERSION}
ok "Fetched updates successfully. 📩"

warn "Checking out version ${VERSION}..."
git checkout ${VERSION}
ok "Checked out version ${VERSION} successfully. ✅"

# Building and installing the new version with error handling
warn "Building and installing the new version..."
make install
ok "-------- Finished installing! 🎉 ---------"

# Verifying the updated version
cyan "----- Verifying Daemon version: -----"
CURRENT_VERSION=$($CHAIN_DAEMON version)
if [ "$CURRENT_VERSION" = "$VERSION" ]; then
  ok "✅ Version verified: ${CURRENT_VERSION}"
else
  err "❌ Version mismatch. Expected: ${VERSION}, but found: ${CURRENT_VERSION}"
  exit 1
fi

# Custom error handling for starting the daemon
set +e  # Disable 'exit immediately' to manually handle errors
cyan "--- Restarting the Daemon... ---"
if ! sudo systemctl start $CHAIN_DAEMON; then
  err "Failed to start the daemon. Please check the system logs with the following command:"
  err "sudo journalctl -u ${CHAIN_DAEMON} -n 50 --no-pager"
  exit 1
fi
set -e  # Re-enable 'exit immediately'
ok "Daemon started successfully. 🚀"

# Prompting for monitoring based on user input or argument
if [ "$MONITOR" = false ]; then
  read -p "Do you want to monitor the Terra Daemon's output? [y/N]: " answer
  case ${answer:0:1} in
    y|Y )
      MONITOR=true
    ;;
    * )
      MONITOR=false
    ;;
  esac
fi

if [ "$MONITOR" = true ]; then
  ok "Monitoring the output 👀 ..."
  sudo journalctl -fu $CHAIN_DAEMON --output cat
fi