DevOps-Bash-tools/gcp_foreach_project.sh

#!/usr/bin/env bash
#  vim:ts=4:sts=4:sw=4:et
#  args: echo project id is {id}, name is '{name}'
#
#  Author: Hari Sekhon
#  Date: 2020-08-25 16:39:17 +0100 (Tue, 25 Aug 2020)
#
#  https://github.com/harisekhon/bash-tools
#
#  License: see accompanying Hari Sekhon LICENSE file
#
#  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help improve or steer this or other code I publish
#
#  https://www.linkedin.com/in/harisekhon
#

set -euo pipefail
[ -n "${DEBUG:-}" ] && set -x
srcdir="$(cd "$(dirname "$0")" && pwd)"

# shellcheck disable=SC1090
. "$srcdir/lib/utils.sh"

# shellcheck disable=SC2034,SC2154
usage_description="
Run a command against each GCP project in the current account

This is powerful so use carefully!

Requires GCloud SDK to be installed and configured and 'gcloud' to be in the \$PATH

Sets the core/project in each iteration, and sets back to the original project upon any exit (except kill -9)
This allows easy chaining with other scripts that operate on the current project

All arguments become the command template

The command template replaces the following for convenience in each iteration:

{id}   - with the project id
{name} - with the project name

eg.
    ${0##*/} 'echo GCP project has id {id} and name {name}'

For a more useful example, see:

    gcp_info_all_projects.sh
"

# used by usage() in lib/utils.sh
# shellcheck disable=SC2034
usage_args="<command>"

help_usage "$@"

min_args 1 "$@"

cmd_template="$*"

current_project="$(gcloud config list --format="value(core.project)")"
if [ -n "$current_project" ]; then
    # want interpolation now not at exit
    # shellcheck disable=SC2064
    trap "gcloud config set project '$current_project'" EXIT
else
    trap "gcloud config unset project" EXIT
fi

while read -r project_id project_name; do
    echo "# ============================================================================ #" >&2
    echo "# GCP Project ID = $project_id -- Name = $project_name" >&2
    echo "# ============================================================================ #" >&2
    gcloud config set project "$project_id"
    cmd="$cmd_template"
    cmd="${cmd//\{project_id\}/$project_id}"
    cmd="${cmd//\{project_name\}/$project_name}"
    cmd="${cmd//\{id\}/$project_id}"
    cmd="${cmd//\{name\}/$project_name}"
    eval "$cmd"
    echo >&2
    echo >&2
#                                          or projectId
done < <(gcloud projects list --format="value(project_id,name)")