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95 lines
2.7 KiB
Bash
95 lines
2.7 KiB
Bash
#!/usr/bin/env bash
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# vim:ts=4:sts=4:sw=4:et
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#
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# Author: Hari Sekhon
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# Date: 2022-02-28 19:18:26 +0000 (Mon, 28 Feb 2022)
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#
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# https://github.com/HariSekhon/DevOps-Bash-tools
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#
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# License: see accompanying Hari Sekhon LICENSE file
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#
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# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
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#
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# https://www.linkedin.com/in/HariSekhon
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#
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set -euo pipefail
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[ -n "${DEBUG:-}" ] && set -x
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# sourcing lib.sh results in Terraform errors 'is_verbose: command not found'
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usage="
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Terraform external program that returns a list of resource ids and attribute for a given resource_type
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Workaround for Terraform Splat expressions not supporting top level resources
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https://github.com/hashicorp/terraform/issues/19931
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Returns a JSON output in format 'map[string]=string' where the key is set to the id and the value is set to the name or selected attribute value of the resource
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Returns a non-zero error code if the resource_type is not found which will be picked up by Terraform to error out, but a missing attribute will get a null value
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Example:
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${0##*/} github_repository
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Terraform:
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data \"external\" \"github_repos\" {
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program = [\"/path/to/${0##*/}\", \"github_repository\"]
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}
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resource \"github_team_repository\" \"devops\" {
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permission = \"admin\"
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for_each = data.external.github_repos.result
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repository = each.key
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team_id = github_team.devops.id
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}
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Requires Terraform and jq to be installed and configured
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usage: ${0##*/} <resource_type> [<attribute>]
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"
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if [ $# -lt 1 ] ||
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[ $# -gt 2 ] ||
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[[ "$1" =~ ^- ]] ||
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[[ "${2:-}" =~ ^- ]]; then
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echo "$usage"
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exit 3
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fi
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resource_type="$1"
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attribute="${2:-name}"
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#terraform state list |
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#grep "^$resource_type\\." |
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#awk -F. '{print $2}' |
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#while read -r resource; do
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# # Terraform state outputs control chars, remove them so grep will work - hard to remove all escape sequences and slow
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# # we need literal escapes here
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# # shellcheck disable=SC1117
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# terraform state show "$resource_type.$resource" |
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# sed "s,\x1B\[[0-9;]*[a-zA-Z],,g" |
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# # nested attributes, eg. branches have greater depth - this code is brittle but Terraform doesn't support -json for terraform state show unfortunately
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# grep -E "^ ${attribute}[[:space:]]+= " |
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# awk -F= '{print $2}' |
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# sed 's/^"//;s/"$//'
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#done |
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terraform show -json -no-color |
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jq -er "
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.values.root_module |
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[
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.resources[],
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.child_modules[].resources[]
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] |
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flatten[] |
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select(.type == \"$resource_type\") |
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select(.values.id) |
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{ (.values.id) : .values.$attribute }" |
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jq -en 'reduce inputs as $in (null; . + $in)'
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