fix: only use custom publicPath if it is not absolute

* closes #578

package.json

@@ -40,7 +40,8 @@
     "rc9": "^1.2.0",
     "replace-in-file": "^6.2.0",
     "resolve-from": "^5.0.0",
-    "semver": "7.3.5"
+    "semver": "7.3.5",
+    "ufo": "^0.7.5"
   },
   "devDependencies": {
     "@nuxt/types": "^2.15.6",

src/build.ts

@@ -7,6 +7,7 @@ import fs from 'fs-extra'
 import resolveFrom from 'resolve-from'
 import { gte, gt } from 'semver'
 import { update as updaterc } from 'rc9'
+import { hasProtocol } from 'ufo'
 
 import { endStep, exec, getNuxtConfig, getNuxtConfigName, globAndPrefix, MutablePackageJson, prepareNodeModules, preparePkgForProd, readJSON, startStep, validateEntrypoint } from './utils'
 import { prepareTypescriptEnvironment, compileTypescriptBuildFiles, JsonOptions } from './typescript'
@@ -150,7 +151,10 @@ export async function build (opts: BuildOptions & { config: NuxtBuilderConfig })
 
   // Read options from nuxt.config.js otherwise set sensible defaults
   const staticDir = (nuxtConfigFile.dir && nuxtConfigFile.dir.static) ? nuxtConfigFile.dir.static : 'static'
-  const publicPath = ((nuxtConfigFile.build && nuxtConfigFile.build.publicPath) ? nuxtConfigFile.build.publicPath : '/_nuxt/').replace(/^\//, '')
+  let publicPath = ((nuxtConfigFile.build && nuxtConfigFile.build.publicPath) ? nuxtConfigFile.build.publicPath : '/_nuxt/').replace(/^\//, '')
+  if (hasProtocol(publicPath)) {
+    publicPath = '_nuxt/'
+  }
   const buildDir = nuxtConfigFile.buildDir ? path.relative(entrypointPath, nuxtConfigFile.buildDir) : '.nuxt'
   const srcDir = nuxtConfigFile.srcDir ? path.relative(entrypointPath, nuxtConfigFile.srcDir) : '.'
   const lambdaName = nuxtConfigFile.lambdaName ? nuxtConfigFile.lambdaName : 'index'

yarn.lock

@@ -11637,7 +11637,7 @@ ua-parser-js@^0.7.28:
   resolved "https://registry.yarnpkg.com/ua-parser-js/-/ua-parser-js-0.7.28.tgz#8ba04e653f35ce210239c64661685bf9121dec31"
   integrity sha512-6Gurc1n//gjp9eQNXjD9O3M/sMwVtN5S8Lv9bvOYBfKfDNiIIhqiyi01vMBO45u4zkDE420w/e0se7Vs+sIg+g==
 
-ufo@^0.7.4:
+ufo@^0.7.4, ufo@^0.7.5:
   version "0.7.5"
   resolved "https://registry.yarnpkg.com/ufo/-/ufo-0.7.5.tgz#5d5b2174747c0072edd30501994c8ac4ad2e77ea"
   integrity sha512-FGG+EgguC1oz5dTE1JptPWCyj6Z9mYpwvZY8PTu9Vh/Aoy+Mj9cpeQ3gg4kyEMDbMrH+lTYiw7bomG58B8X7Kg==