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56 lines
2.1 KiB
Bash
56 lines
2.1 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: 2024-02-16 01:28:12 +0000 (Fri, 16 Feb 2024)
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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 "${DEBUG:-}" ] && set -x
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srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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# shellcheck disable=SC1090,SC1091
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. "$srcdir/lib/utils.sh"
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# shellcheck disable=SC2034,SC2154
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usage_description="
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Determines the Terraform state version from the tfstate file in a GCS bucket found in a local given backend.tf
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Parses backend.tf for the bucket and file path to the tfstate file in GCS
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Then curls that GCS file's contents and parses it to get the state version
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This is important so that you know what terraform version to set without accidentally updating the client's terraform state, which can potentially break existing clients and CI/CD which will no longer be able to run using the older client version
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"
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# used by usage() in lib/utils.sh
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# shellcheck disable=SC2034
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usage_args="<backend.tf>"
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help_usage "$@"
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max_args 1 "$@"
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backend_tf_file="${1:-$PWD/backend.tf}"
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if ! [ -f "$backend_tf_file" ]; then
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die "File not found: $backend_tf_file - check you are specifying the right path to the .tf file containing the backend definition"
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fi
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log "Parsing $backend_tf_file for bucket and prefix"
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# TODO: check if backend "gcs" vs other clouds and extend this to AWS and Azure backends
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bucket="$(grep -m1 '^[[:space:]]*bucket[[:space:]]*=.*' "$backend_tf_file" | sed 's/.*=//; s/[[:space:]]//g; s/"//g' || die "Failed to parse bucket from $backend_tf_file")"
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prefix="$(grep -m1 '^[[:space:]]*prefix[[:space:]]*=.*' "$backend_tf_file" | sed 's/.*=//; s/[[:space:]]//g; s/"//g' || :)" # || die "Failed to parse bucket from $backend_tf_file")"
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log "Fetching and parsing bucket '$bucket' file '$prefix${prefix+/}default.tfstate'"
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"$srcdir/../gcp/gcs_curl_file.sh" "$bucket" "$prefix${prefix+/}default.tfstate" |
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jq -r '.terraform_version'
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