Update a set of TFC workspace VCS configs to use a Github App

update-tfc-workspace-vcs-config.sh

#!/bin/bash

# Connect a TFC workspace to a Github VCS provider using the TFC API.

INFILE_WORKSPACES="tfc-workspace-name-list.txt"

function check_env() {
	var_name="$1"
	var_value="$2"

	if [ -z "$var_value" ]; then
		echo "Missing $var_name environment variable";
		exit 1;
	fi
}

check_env "TFC_API_TOKEN" "$TFC_API_TOKEN"
check_env "TFC_ORGANIZATION_NAME" "$TFC_ORGANIZATION_NAME"
check_env "VCS_REPO_IDENTIFIER" "$VCS_REPO_IDENTIFIER" # <org>/<repo>
check_env "GITHUB_APP_INSTALLATION_ID" "$GITHUB_APP_INSTALLATION_ID" # ghain-XXXXXXXXXX

# JSON payload to update the VCS repository settings
UPDATE_PAYLOAD=$(cat <<EOF
{
  "data": {
    "attributes": {
      "vcs-repo": {
        "identifier": "${VCS_REPO_IDENTIFIER}",
        "github-app-installation-id": "${GITHUB_APP_INSTALLATION_ID}"
      }
    }
  }
}
EOF
)

for TFC_WORKSPACE_NAME in $(cat $INFILE_WORKSPACES); do

	# API endpoint to update the workspace
	API_URL="https://app.terraform.io/api/v2/organizations/${TFC_ORGANIZATION_NAME}/workspaces/${TFC_WORKSPACE_NAME}"
	echo "Request URL: $API_URL"

	# Make the API request using curl
	response=$(curl -s \
		-X PATCH \
		--url "${API_URL}" \
		--header "Authorization: Bearer ${TFC_API_TOKEN}" \
		--header "Content-Type: application/vnd.api+json" \
		--data "${UPDATE_PAYLOAD}")

	# Output the response
	echo "Response from Terraform Cloud API:"
	echo "${response}"

done