Shell script to place AWS credentials issued by Opal to local AWS config

update-config.sh

#!/bin/sh
# Usage Instructions
# - Open Opal and login to AWS.
# - Copy content with environment variables and place it to ~/.aws/opal-config.txt
# - Make the script executable: chmod +x update-config.sh
# - The script will place the credentials to ~/.aws/config

config_file="$HOME/.aws/opal-config.txt"
aws_config_file="$HOME/.aws/config"

# Check if the opal-config.txt exists
if [ ! -f "$config_file" ]; then
    echo "Error: opal-config.txt not found."
    exit 1
fi

# Read the opal-config.txt file
while IFS= read -r line || [[ -n "$line" ]]; do
    # Remove leading/trailing whitespaces
    line=$(echo "$line" | tr -d '[:space:]')

    # Check if the line is empty or starts with '#'
    if [ -z "$line" ] || [[ "$line" == "#"* ]]; then
        continue
    fi

    # Extract key and value
    key="${line%%=*}"
    value="${line#*=}"

    # Remove 'export' if present
    key="${key#export}"

    case "$key" in
        AWS_ACCESS_KEY_ID)
            aws_access_key_id="$value"
            ;;
        AWS_SECRET_ACCESS_KEY)
            aws_secret_access_key="$value"
            ;;
        AWS_SESSION_TOKEN)
            aws_session_token="$value"
            ;;
    esac
    echo "Key: $key, Value: $value"
done < "$config_file"
echo "$aws_access_key_id / $aws_secret_access_key / $aws_session_token"
# Write to ~/.aws/config
cat <<EOF > "$aws_config_file"
[default]
aws_access_key_id = $aws_access_key_id
aws_secret_access_key = $aws_secret_access_key
aws_session_token = $aws_session_token
EOF

echo "AWS configuration updated."