fix: read properties files to get APP_URL

.gitignore

@@ -24,4 +24,8 @@ dist-ssr
 *.sw?
 
 # Plugin hot file
-hot
+hot
+
+# Java
+target/
+build/

examples/vanilla/.env

@@ -1,5 +1,2 @@
-# Custom app url
-# APP_URL=
-
 # Filter debug logs
 # VITE_DEBUG_FILTER=

examples/vanilla/src/main/resources/application.properties

@@ -0,0 +1,2 @@
+app.url=http://localhost:8080
+app.name=Vite Java App

examples/vanilla/vite.config.ts

@@ -1,8 +1,8 @@
 import { defineConfig } from 'vite'
 import java, { createRollupInputConfig } from 'vite-plugin-java'
 
-export default defineConfig(() => ({
+export default defineConfig({
   plugins: [java({
     input: createRollupInputConfig(),
   })],
-}))
+})

packages/vite-plugin-java/src/index.ts

@@ -60,6 +60,6 @@ export interface VitePluginJavaConfig {
 
 export type DevServerUrl = `${'http' | 'https'}://${string}:${number}`
 
-export { PLUGIN_NAME, createRollupInputConfig } from './utils'
+export { PLUGIN_NAME, createRollupInputConfig, readPropertiesFile } from './utils'
 export { java }
 export default java

packages/vite-plugin-java/src/utils.ts

@@ -4,6 +4,7 @@ import fs from 'node:fs'
 import { fileURLToPath } from 'node:url'
 import type { AddressInfo } from 'node:net'
 import debug from 'debug'
+import type { GlobOptions } from 'glob'
 import { globSync } from 'glob'
 import 'dotenv/config'
 import { merge } from 'smob'
@@ -101,3 +102,26 @@ export function isMavenProject(): boolean {
 export function isGradleProject(): boolean {
   return fs.existsSync(path.join(process.cwd(), 'build.gradle'))
 }
+
+/**
+ * Reads the properties from the project files.
+ *
+ * @returns A map containing the key-value pairs of the properties.
+ */
+export function readPropertiesFile(pattern?: string | string[], options?: GlobOptions): Map<string, string> {
+  const properties: Map<string, string> = new Map()
+  const _pattern = pattern || '**/*.properties'
+  const _options = merge({}, options || {}, { cwd: process.cwd() })
+
+  globSync(_pattern, _options).forEach((file) => {
+    const _file = typeof file === 'string' ? file : file.path
+    const content = fs.readFileSync(_file, 'utf-8')
+    content.split('\n').filter(c => !c?.trim().startsWith('#')).forEach((line) => {
+      const [key, value] = line.split('=')
+      if (key)
+        properties.set(key?.trim(), value?.trim())
+    })
+  })
+
+  return properties
+}

packages/vite-plugin-java/src/vite-plugin-java.ts

@@ -8,7 +8,7 @@ import { loadEnv } from 'vite'
 import { merge } from 'smob'
 import colors from 'picocolors'
 import swc from '@rollup/plugin-swc'
-import { PLUGIN_NAME, createDebugger, dirname, isGradleProject, isIpv6, isMavenProject } from './utils'
+import { PLUGIN_NAME, createDebugger, dirname, isGradleProject, isIpv6, isMavenProject, readPropertiesFile } from './utils'
 import type { DevServerUrl, VitePluginJavaConfig } from '.'
 
 const debug = createDebugger(`${PLUGIN_NAME}`)
@@ -120,8 +120,9 @@ function resolveJavaPlugin(pluginConfig: Required<VitePluginJavaConfig>): [JavaP
         }
       },
       configureServer(server) {
-        const envDir = resolvedConfig.envDir || process.cwd()
-        const appUrl = loadEnv(resolvedConfig.mode, envDir, 'APP_URL').APP_URL ?? 'undefined'
+        // TODO: Add support for reading yaml files.
+        const properties = readPropertiesFile()
+        const appUrl = properties.get('app.url') ?? 'undefined'
 
         server.httpServer?.once('listening', () => {
           debug?.('server listening.')
@@ -136,7 +137,10 @@ function resolveJavaPlugin(pluginConfig: Required<VitePluginJavaConfig>): [JavaP
             setTimeout(() => {
               server.config.logger.info(`\n  ${colors.red(`${colors.bold('JAVA')} ${javaVersion()}`)}  ${colors.dim('plugin')} ${colors.bold(`v${pluginVersion()}`)}`)
               server.config.logger.info('')
-              server.config.logger.info(`  ${colors.green('➜')}  ${colors.bold('APP_URL')}: ${colors.cyan(appUrl.replace(/:(\d+)/, (_, port) => `:${colors.bold(port)}`))}`)
+
+              if (appUrl !== 'undefined') {
+                server.config.logger.info(`  ${colors.green('➜')}  ${colors.bold('APP_URL')}: ${colors.cyan(appUrl.replace(/:(\d+)/, (_, port) => `:${colors.bold(port)}`))}`)
+              }
             }, 100)
           }
         })

packages/vite-plugin-java/test/utils.test.ts

@@ -1,7 +1,7 @@
 import fs from 'node:fs'
 import path from 'node:path'
 import { afterAll, beforeAll, describe, expect, it } from 'vitest'
-import { createRollupInputConfig } from '../src/utils'
+import { createRollupInputConfig, readPropertiesFile } from '../src/utils'
 
 const files = [
   'src/main.ts',
@@ -48,4 +48,22 @@ describe('vite-plugin-java - utils', () => {
       [path.normalize('nested/main')]: getAbsolutePath('src/nested/main.ts'),
     })
   })
+
+  it('should read properties and return mapped entries', () => {
+    const expectedProperties = new Map(
+      [
+        ['app.url', 'http://localhost:8080'],
+        ['app.name', 'Vite Java App'],
+      ],
+    )
+    let content = ''
+
+    for (const [key, value] of expectedProperties.entries()) {
+      content += `${key}=${value}\n`
+    }
+    fs.writeFileSync('fixtures/application.properties', content)
+
+    const propertiesMap = readPropertiesFile()
+    expect(propertiesMap).toEqual(expectedProperties)
+  })
 })