feat: add env var injection for content

src/index.ts

@@ -1,4 +1,5 @@
 import { container } from '#lib/utils/container';
+import { insertEnvVars } from '#lib/utils/insertEnvVars';
 import { obfuscateWebhookUrl, UnboundWebhookRegex } from '#lib/utils/obfuscateWebhookUrl';
 import { preflightChecks } from '#lib/utils/preflightChecks';
 import { setupLogger } from '#lib/utils/setup-logger';
@@ -87,7 +88,7 @@ try {
 	await rest.post(Routes.webhook(hookId, hookToken), {
 		auth: false,
 		body: {
-			content: checkedOptions.content,
+			content: insertEnvVars(checkedOptions.content),
 			allowed_mentions: {
 				users: checkedOptions['allowed-user-mentions'],
 				roles: checkedOptions['allowed-role-mentions']

src/lib/utils/insertEnvVars.ts

@@ -0,0 +1,29 @@
+import { env } from 'node:process';
+
+interface ValidEnvValues {
+	readonly ATC_EXTERNAL_URL: string;
+	readonly BUILD_ID: string;
+	readonly BUILD_JOB_ID: string;
+	readonly BUILD_JOB_NAME: string;
+	readonly BUILD_NAME: string;
+	readonly BUILD_PIPELINE_ID: string;
+	readonly BUILD_PIPELINE_NAME: string;
+	readonly BUILD_TEAM_ID: string;
+	readonly BUILD_TEAM_NAME: string;
+}
+
+const validEnvValues: ValidEnvValues = {
+	BUILD_PIPELINE_NAME: env.BUILD_PIPELINE_NAME!,
+	BUILD_PIPELINE_ID: env.BUILD_PIPELINE_ID!,
+	BUILD_NAME: env.BUILD_NAME!,
+	BUILD_TEAM_NAME: env.BUILD_TEAM_NAME!,
+	BUILD_JOB_NAME: env.BUILD_JOB_NAME!,
+	BUILD_ID: env.BUILD_ID!,
+	BUILD_TEAM_ID: env.BUILD_TEAM_ID!,
+	BUILD_JOB_ID: env.BUILD_JOB_ID!,
+	ATC_EXTERNAL_URL: env.ATC_EXTERNAL_URL!
+};
+
+export function insertEnvVars(content: string): string {
+	return content.replaceAll(/\${?(?<varName>\w+)}?/g, (_, varName) => validEnvValues[varName as keyof typeof validEnvValues]);
+}