List all Google Cloud GCP projects in Organization

list-all-projects-in-org.sh

#!/usr/bin/env bash

# Google Cloud script
# This script checks in an organization for all the projects and list them
#
# Usage examples:
#   list-all-projects-in-org.sh --organization 123456789
#
# Notes:
# To run this script, you need the required IAM permissions
# to list projects in the organization.
#
# Disclaimer: This is not an official Google product. The Sample code is
# provided as-is, without warranty or representation for any use or purpose,
# and is intended to serve as a model for a potential solution.

if [[ "$#" -ne 2 ]]; then
    cat <<EOF
Usage: list-all-projects-in-org.sh <option...>
Options  (exclusive)
  --organization <organization-id>: for all the projects of the organization
EOF
    exit 1
fi

function check_projects_in_organization() {
    local -r org="$1"

    echo "Listing projects in organization ${org}"
    echo ""
    local projects
    projects=($(gcloud asset search-all-resources \
        --asset-types="cloudresourcemanager.googleapis.com/Project" \
        --scope=organizations/"${org}" \
        --format='value(additionalAttributes.projectId)'))
    echo "Found ${#projects[@]} project(s) in organization ${org}"
    echo ""
    echo "List of projects"
    echo ""

    # Getting the list of all projects, you can change the output fomat as documented in https://cloud.google.com/sdk/gcloud/reference/topic/formats
    gcloud asset search-all-resources --asset-types="cloudresourcemanager.googleapis.com/Project" --scope=organizations/"${org}" --format="csv[separator="\\t"](additionalAttributes.projectId,displayName,folders,state)"
    echo ""
}

function main() {
    if [[ "$1" == "--organization" ]]; then
        # Check if the organization ID is a valid decimal number and does not have leading zeros
        if ! [[ "$2" =~ ^(?:[1-9][0-9]*|0)$ ]]; then
            echo "Error: Invalid organization ID: $2"
            exit 1
        fi
        check_projects_in_organization "$2"
    else
        echo "Unknown flag: $1"
        exit 1
    fi
}

main "$@"