Fills in env vars in template and runs it on remote postgres

playbook.sh

#!/bin/bash

# commands used in this script
required_commands=("gum" "envsubst")
# Ensure the required commands are installed
for cmd in "${required_commands[@]}"; do
  if ! type "$cmd" &> /dev/null; then
    echo "Error: $cmd not found in PATH. Please install it first:"
    exit 1
  fi
done

# create temp file for envsubst and clean up after script
temp_file=$(mktemp)
trap 'rm -f "$temp_file"' EXIT

# Check if the script was passed a file
if [[ $# -eq 0 ]]; then
  echo "Please select a template file to use"
  file=$(gum file .)
else
  file=$1
fi

# Check if the template file exists
if [[ ! -f $file ]]; then
  echo "Error: File: $file does not exist"
  exit 1
fi

# Get all the variables from the input file that start with $
vars=$(grep -oP '(?<=\$)[A-Za-z0-9_]+' "$file" | sort | uniq)

# for each variable use gum to prompt the user for a value and set the environmental variable
for var in $vars; do
  user_value=$(gum input --placeholder "Enter value for $var: ")
  export "$var=$user_value"
  echo "$var set to $user_value"
done

# substitute the variables in the input file and output to a temp file
envsubst < "$file" > "$temp_file"

gum pager < "$temp_file"
cat $temp_file | gum format -t code
gum confirm "Does the contents look correct?" --default=false || exit 1



# run the postgres query with the contents of the populated script
echo "ssh $server 'psql ' <$temp_file"