tf — terraform wrapper script

tf

#!/bin/bash

set -e -o pipefail

case "$1" in
    plan)
        terraform plan -out planfile
        ;;

    apply)
        if [ ! -f planfile ]; then
            echo "No plan to apply -- run 'tf plan' first."
            exit 1
        fi
        terraform apply planfile \
            && rm planfile
        ;;

    diff)
        input="$2"

        if [ -z "$input" ]; then
            if [ -t 0 ]; then
                input="$(pbpaste)"
            else
                input="$(cat)"
            fi
        fi

        IFS=$'\n'
        for line in "$input"; do
            pattern='^(?: *[a-z0-9_]+: *)?(".*") => (".*")$'
            before=$(
                echo "$line" \
                    | perl -pe 'BEGIN { $/="" }; s{'"$pattern"'}{$1}sm;' \
                    | jq -eS 'fromjson'
            )
            after=$(
                echo "$line" \
                    | perl -pe 'BEGIN { $/="" }; s{'"$pattern"'}{$2}sm;' \
                    | jq -eS 'fromjson'
            )
            diff -u <(echo "$before") <(echo "$after")
        done
        ;;
esac