Added source script to set environment variables

This allows for embedding the repo root inside of, for example, scripts
to make them function properly no matter where they are run from.

templates/generate_configs.sh

@@ -1,11 +1,10 @@
 #!/usr/bin/env bash
 set -euo pipefail
-ROOT=$(git rev-parse --show-toplevel)
+ROOT={{ root }}
 CONFIGS=${ROOT}/configs
 
 # Generate the configuration for each node
-{% set clusters = [] %}
-{%- for node in nodes -%}
+{% for node in nodes -%}
 talosctl gen config {{ node.clusterName }} https://{{ node.controlplaneIp }}:6443 -f \
 	--with-secrets ${ROOT}/secrets.yaml \
 	--talos-version {{ node.talosVersion }} \
@@ -22,21 +21,20 @@ talosctl gen config {{ node.clusterName }} https://{{ node.controlplaneIp }}:644
 	--with-docs=false \
 	--with-examples=false \
 	-o ${CONFIGS}/{{ node.filename }}.yaml
-
-	{%- do clusters.append((node.clusterName, node.controlplaneIp)) %}
 {% endfor %}
 
 # Generate the talosconfig file for each cluster
-{% for cluster in clusters|unique -%}
-talosctl gen config {{ cluster[0] }} https://{{ cluster[1] }}:6443 -f \
+{# NOTE: This assumes that each node in a cluster specifies the same controlplane IP -#}
+{% for cluster in clusters -%}
+talosctl gen config {{ cluster.name }} https://{{ cluster.controlplaneIp }}:6443 -f \
 	--with-secrets ${ROOT}/secrets.yaml \
 	--output-types talosconfig \
-	-o ${CONFIGS}/{{ cluster[0] }}/talosconfig
+	-o ${CONFIGS}/{{ cluster.name }}/talosconfig
 {% endfor %}
 
 # Create merged talosconfig
 export TALOSCONFIG=${CONFIGS}/talosconfig
 rm -f ${TALOSCONFIG}
-{% for cluster in clusters|unique -%}
-talosctl config merge ${CONFIGS}/{{ cluster[0] }}/talosconfig
+{% for cluster in clusters -%}
+talosctl config merge ${CONFIGS}/{{ cluster.name }}/talosconfig
 {% endfor %}

templates/source.sh

@@ -0,0 +1,6 @@
+export TALOSCONFIG={{ root }}/configs/talosconfig
+{% set paths = [] %}
+{%- for cluster_name in nodes|map(attribute="clusterName")|unique -%}
+	{%- do paths.append(root ~ "/configs/" ~ cluster_name ~ "/kubeconfig") -%}
+{% endfor -%}
+export KUBECTL={{ paths|join(":") }}

tools/render

@@ -5,13 +5,14 @@
 import functools
 import json
 import pathlib
+import sys
 
 import git
 import requests
 import yaml
 from jinja2 import Environment, FileSystemLoader, StrictUndefined, Template
 
-REPO = git.Repo(".", search_parent_directories=True)
+REPO = git.Repo(sys.path[0], search_parent_directories=True)
 assert REPO.working_dir is not None
 
 ROOT = pathlib.Path(REPO.working_dir)
@@ -134,6 +135,16 @@ def main():
         )
     )
 
+    # Get all clusterName & controlplaneIp pairs
+    clusters = map(
+        lambda node: {
+            "name": node["clusterName"],
+            "controlplaneIp": node["controlplaneIp"],
+        },
+        nodes,
+    )
+    clusters = [dict(s) for s in set(frozenset(d.items()) for d in clusters)]
+
     with open(ROOT.joinpath("config.yaml")) as fyaml:
         config = yaml.safe_load(fyaml)
 
@@ -141,7 +152,9 @@ def main():
     for template_name in TEMPLATES.list_templates():
         template = TEMPLATES.get_template(template_name)
 
-        rendered = template.render(nodes=nodes, config=config)
+        rendered = template.render(
+            nodes=nodes, clusters=clusters, config=config, root=ROOT
+        )
         with open(RENDERED.joinpath(template_name), "w") as f:
             f.write(rendered)