Tuesday, March 16, 2021 DevOpsDC Monthly Meetup - Lightning Talk

.gitignore

@@ -13,3 +13,6 @@
 
 # temp folders
 tmp
+
+# ms office files
+~*

.terraform-version

@@ -0,0 +1 @@
+0.13.5

README.md

@@ -45,6 +45,7 @@ No resources.
 | Name | Description | Type | Default | Required |
 |------|-------------|------|---------|:--------:|
 | name | Moniker to apply to all resources in the module | `string` | n/a | yes |
+| password | n/a | `any` | n/a | yes |
 | tags | User-Defined tags | `map(string)` | `{}` | no |
 
 ## Outputs

bin/demo-magic.sh

@@ -0,0 +1,214 @@
+#!/usr/bin/env bash
+
+###############################################################################
+#
+# demo-magic.sh
+#
+# Copyright (c) 2015 Paxton Hare
+#
+# This script lets you script demos in bash. It runs through your demo script when you press
+# ENTER. It simulates typing and runs commands.
+#
+###############################################################################
+
+# the speed to "type" the text
+TYPE_SPEED=20
+
+# no wait after "p" or "pe"
+NO_WAIT=false
+
+# if > 0, will pause for this amount of seconds before automatically proceeding with any p or pe
+PROMPT_TIMEOUT=0
+
+# don't show command number unless user specifies it
+SHOW_CMD_NUMS=false
+
+
+# handy color vars for pretty prompts
+BLACK="\033[0;30m"
+BLUE="\033[0;34m"
+GREEN="\033[0;32m"
+GREY="\033[0;90m"
+CYAN="\033[0;36m"
+RED="\033[0;31m"
+PURPLE="\033[0;35m"
+BROWN="\033[0;33m"
+WHITE="\033[1;37m"
+COLOR_RESET="\033[0m"
+
+C_NUM=0
+
+# prompt and command color which can be overridden
+DEMO_PROMPT="$ "
+DEMO_CMD_COLOR=$WHITE
+DEMO_COMMENT_COLOR=$GREY
+
+##
+# prints the script usage
+##
+function usage() {
+  echo -e ""
+  echo -e "Usage: $0 [options]"
+  echo -e ""
+  echo -e "\tWhere options is one or more of:"
+  echo -e "\t-h\tPrints Help text"
+  echo -e "\t-d\tDebug mode. Disables simulated typing"
+  echo -e "\t-n\tNo wait"
+  echo -e "\t-w\tWaits max the given amount of seconds before proceeding with demo (e.g. '-w5')"
+  echo -e ""
+}
+
+##
+# wait for user to press ENTER
+# if $PROMPT_TIMEOUT > 0 this will be used as the max time for proceeding automatically
+##
+function wait() {
+  if [[ "$PROMPT_TIMEOUT" == "0" ]]; then
+    read -rs
+  else
+    read -rst "$PROMPT_TIMEOUT"
+  fi
+}
+
+##
+# print command only. Useful for when you want to pretend to run a command
+#
+# takes 1 param - the string command to print
+#
+# usage: p "ls -l"
+#
+##
+function p() {
+  if [[ ${1:0:1} == "#" ]]; then
+    cmd=$DEMO_COMMENT_COLOR$1$COLOR_RESET
+  else
+    cmd=$DEMO_CMD_COLOR$1$COLOR_RESET
+  fi
+
+  # render the prompt
+  x=$(PS1="$DEMO_PROMPT" "$BASH" --norc -i </dev/null 2>&1 | sed -n '${s/^\(.*\)exit$/\1/p;}')
+
+  # show command number is selected
+  if $SHOW_CMD_NUMS; then
+   printf "[$((++C_NUM))] $x"
+  else
+   printf "$x"
+  fi
+
+  # wait for the user to press a key before typing the command
+  if [ $NO_WAIT = false ]; then
+    wait
+  fi
+
+  if [[ -z $TYPE_SPEED ]]; then
+    echo -en "$cmd"
+  else
+    echo -en "$cmd" | pv -qL $[$TYPE_SPEED+(-2 + RANDOM%5)];
+  fi
+
+  # wait for the user to press a key before moving on
+  if [ $NO_WAIT = false ]; then
+    wait
+  fi
+  echo ""
+}
+
+##
+# Prints and executes a command
+#
+# takes 1 parameter - the string command to run
+#
+# usage: pe "ls -l"
+#
+##
+function pe() {
+  # print the command
+  p "$@"
+  run_cmd "$@"
+}
+
+##
+# print and executes a command immediately
+#
+# takes 1 parameter - the string command to run
+#
+# usage: pei "ls -l"
+#
+##
+function pei {
+  NO_WAIT=true pe "$@"
+}
+
+##
+# Enters script into interactive mode
+#
+# and allows newly typed commands to be executed within the script
+#
+# usage : cmd
+#
+##
+function cmd() {
+  # render the prompt
+  x=$(PS1="$DEMO_PROMPT" "$BASH" --norc -i </dev/null 2>&1 | sed -n '${s/^\(.*\)exit$/\1/p;}')
+  printf "$x\033[0m"
+  read command
+  run_cmd "${command}"
+}
+
+function run_cmd() {
+  function handle_cancel() {
+    printf ""
+  }
+
+  trap handle_cancel SIGINT
+  stty -echoctl
+  eval "$@"
+  stty echoctl
+  trap - SIGINT
+}
+
+
+function check_pv() {
+  command -v pv >/dev/null 2>&1 || {
+
+    echo ""
+    echo -e "${RED}##############################################################"
+    echo "# HOLD IT!! I require pv but it's not installed.  Aborting." >&2;
+    echo -e "${RED}##############################################################"
+    echo ""
+    echo -e "${COLOR_RESET}Installing pv:"
+    echo ""
+    echo -e "${BLUE}Mac:${COLOR_RESET} $ brew install pv"
+    echo ""
+    echo -e "${BLUE}Other:${COLOR_RESET} http://www.ivarch.com/programs/pv.shtml"
+    echo -e "${COLOR_RESET}"
+    exit 1;
+  }
+}
+
+check_pv
+#
+# handle some default params
+# -h for help
+# -d for disabling simulated typing
+#
+while getopts ":dhncw:" opt; do
+  case $opt in
+    h)
+      usage
+      exit 1
+      ;;
+    d)
+      unset TYPE_SPEED
+      ;;
+    n)
+      NO_WAIT=true
+      ;;
+    c)
+      SHOW_CMD_NUMS=true
+      ;;
+    w)
+      PROMPT_TIMEOUT=$OPTARG
+      ;;
+  esac
+done

bin/demo.sh

@@ -0,0 +1,79 @@
+#!/bin/bash
+
+
+##########################################
+# use the magic
+# https://github.com/paxtonhare/demo-magic/tree/10abf5390b6d5461155dc58012081490598f7bad
+##########################################
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+source $DIR/demo-magic.sh
+
+##########################################
+# set the magic values
+##########################################
+
+# speed at which to simulate typing. bigger num = faster
+TYPE_SPEED=20
+
+# custom prompt
+# see http://www.tldp.org/HOWTO/Bash-Prompt-HOWTO/bash-prompt-escape-sequences.html for escape sequences
+DEMO_PROMPT="${GREEN}➜ ${CYAN}\W "
+
+# text color
+# DEMO_CMD_COLOR=$BLACK
+
+# hide the evidence
+clear
+
+##########################################
+# Demo:
+# 1. look at the (commented) files containing the configuration information
+# 2. start the demo by running the pre-commit hooks
+# 3. make a change
+# 4. try and fail to commit
+# 5. restore
+# 6. watch hook write docs
+##########################################
+
+# use filebrowser
+# to investigate what's in the pre-commit config
+# pe "code .pre-commit-config.yaml"
+# pe "code .tflint.hcl"
+# pe "code .yamllint.yml"
+
+# we can run them and see no bugs
+pe "pre-commit run -a"
+
+# create a bug
+pe "code main.tf && echo 'watch me add a nasty bug'"
+# pe "echo 'BUG!!!' > main.tf "
+
+# terraform knows about the bug
+pe "terraform init"
+
+# add a bug
+pe "git add main.tf"
+
+# try to commit but it found the bug
+pe "git commit"
+
+# fix it
+pe "git reset . && git restore ."
+
+# uncomment the final output
+pe "code main.tf"
+
+# add and commit
+pe "git add main.tf"
+pe "git commit"
+
+# it fixed the readme!
+# pe "code README.md"
+
+# now add and commit
+pe "git add main.tf README.md"
+pe "git commit"
+
+# show a prompt so as not to reveal our true nature after
+# the demo has concluded
+p ""

main.tf

@@ -8,6 +8,8 @@ module "tags" {
   tags         = var.tags
 }
 
+variable "password" {}
+
 locals {
   # tflint-ignore: terraform_unused_declarations
   name = module.tags.name