Fix issue attempting to pre-render pages that queried the database

src/data/database.ts

@@ -4,6 +4,7 @@ import {Kysely, PostgresDialect} from 'kysely'
 import * as fs from "node:fs";
 import {z} from 'zod';
 
+type Env = z.infer<typeof envSchema>;
 const envSchema = z.object({
     POSTGRES_DB: z.string(),
     POSTGRES_HOST: z.string(),
@@ -38,9 +39,14 @@ const envSchema = z.object({
     }
 );
 
-const env = envSchema.parse(process.env);
+const buildTime = process.env.NEXT_PHASE === 'phase-production-build';
+const env = buildTime ? 'build-time' : envSchema.parse(process.env);
+
+function fileOrEnv(fileKey: keyof Env, valueKey: keyof Env): string | undefined {
+    if (env == 'build-time') {
+        return undefined;
+    }
 
-function fileOrEnv(fileKey: keyof typeof env, valueKey: keyof typeof env): string | undefined {
     const file: string = env[fileKey] as string;
 
     if (file && fs.existsSync(file)) {
@@ -57,16 +63,14 @@ function getCredentials() {
     }
 }
 
-const dialect = new PostgresDialect({
-    pool: new Pool({
-        database: env.POSTGRES_DB,
-        host: env.POSTGRES_HOST,
-        port: env.POSTGRES_PORT,
-        ...getCredentials(),
-        max: 10,
-    })
-})
-
-export const db = new Kysely<Database>({
-    dialect,
+export const db = env === 'build-time' ? null : new Kysely<Database>({
+    dialect: new PostgresDialect({
+        pool: new Pool({
+            database: env.POSTGRES_DB,
+            host: env.POSTGRES_HOST,
+            port: env.POSTGRES_PORT,
+            ...getCredentials(),
+            max: 10,
+        })
+    }),
 })

src/data/fetchWithSQL.ts

@@ -4,6 +4,14 @@ import {db} from "@/data/database";
 import * as dFns from "date-fns";
 
 export async function getDataSQL(config: OverviewConfig): Promise<Data> {
+    // If we're in build-time, we don't have access to the database
+    if (!db) {
+        return {
+            projects: [],
+            timeEntries: [],
+        }
+    }
+
     let projectIds = config.subjects.map((subject) => subject.projectId.toString());
 
     const projects = await db.selectFrom('project')