build --release is failing in webpack

cordova build android

is successfuly building in platforms/android/build/outputs/apk/android-debug.apk

But when I want to build a release with

cordova build android --release

webpack build is failing with :

Before deploy hook started...
Checking is node modules installed...
Node modules already installed.
Starting webpack build...
Error happened when webpack build: Error: Command failed: /home/emak/code/portrait/node_modules/.bin/webpack --env.release
fallbackLoader option has been deprecated - replace with "fallback"
loader option has been deprecated - replace with "use"
clean-webpack-plugin: /home/emak/code/portrait/www has been removed.
(node:16644) DeprecationWarning: loaderUtils.parseQuery() received a non-string value which can be problematic, see https://github.com/webpack/loader-utils/is
sues/56                                                                                                                                                       parseQuery() will be replaced with getOptions() in the next major version of loader-utils.

Webpack build completed to www folder successfully!
Error happened on main chain:
Error: Error happened when webpack build: Error: Command failed: /home/emak/code/portrait/node_modules/.bin/webpack --env.release
fallbackLoader option has been deprecated - replace with "fallback"
loader option has been deprecated - replace with "use"
clean-webpack-plugin: /home/emak/code/portrait/www has been removed.
(node:16644) DeprecationWarning: loaderUtils.parseQuery() received a non-string value which can be problematic, see https://github.com/webpack/loader-utils/is
sues/56                                                                                                                                                       parseQuery() will be replaced with getOptions() in the next major version of loader-utils.

    at exec (/home/emak/code/portrait/hooks/hookers.js:171:19)
    at ChildProcess.exithandler (child_process.js:218:5)
    at emitTwo (events.js:106:13)
    at ChildProcess.emit (events.js:191:7)
    at maybeClose (internal/child_process.js:885:16)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:226:5)
Error: Error happened when webpack build: Error: Command failed: /home/emak/code/portrait/node_modules/.bin/webpack --env.release
fallbackLoader option has been deprecated - replace with "fallback"
loader option has been deprecated - replace with "use"
clean-webpack-plugin: /home/emak/code/portrait/www has been removed.
(node:16644) DeprecationWarning: loaderUtils.parseQuery() received a non-string value which can be problematic, see https://github.com/webpack/loader-utils/is
sues/56                                                                                                                                                       parseQuery() will be replaced with getOptions() in the next major version of loader-utils.

I tried to change webpack.config.js:L77-78 according to this messages without success.

fallbackLoader option has been deprecated - replace with "fallback"
loader option has been deprecated - replace with "use"

[Em-AK]

My current workaround is to launch

cordova prepare

then

cordova compile android --release

so that webpack compiles as usual without the release flag. The outputed JS may not be optimal but it runs.

[coedycode]

Hi @Em-AK I’ve been seeing similar error output when running a build release.

In my case I found running the webpack process on it’s own

./node_modules/.bin/webpack --env.release

gave a more verbose error report, and the problems turned out to be Uglifyjs finding syntax errors in my vue components (I’ve been using ES2105 and there’s no babel step in the release build, but the ES2015 is all supported by chrome so in development there were no problems. ).

The vue-loader will transpile if there’s .bablerc with { “presets”: [“es2015”] } in the root directory.