generateLicenses Task takes excessively long

[kibotu]

Describe the bug

we apply the plugin

apply plugin: 'com.google.android.gms.oss-licenses-plugin'

app:genererateLicenses task excessively long

it increases our build times between 15-30 minutes (from 5 minutes)

To Reproduce

here are our dependencies
sdkDependencies.txt

Expected behavior

Screenshots

Desktop (please complete the following information):
Gradle 6.8.3
com.google.android.gms:oss-licenses-plugin:0.10.2

Additional context
continues builds are fast but clean builds on CI are every single time extremely slow

[eric-klukovich]

I'm running into a similar issue with my project. Were you able to find a way to decrease the time this task takes?

[maxkohne]

Same here. Its about ~21min on average for me

[ilynehan]

Hi there! We are still experiencing this issue and the task run time has only continually gotten worse. We'd love to take a look and contribute back to the project if possible but wanted to make sure we have the correct approach.

We think the issue is with this recursive method that can take 80+ minutes to execute.

play-services-plugins/oss-licenses-plugin/src/main/groovy/com/google/android/gms/oss/licenses/plugin/DependencyUtil.groovy

Line 116 in b635f8f

private static File findLibraryFileInResolvedDependencies(

@caller9 and @rekire (since you were the last two committers on this plugin), would you be able to confirm?

Also, noticing this part of the repo hasn't been getting much traction, @davidmotson, would you able to point us to how we can get some help on this issue?

[rekire]

From my side I neither confirm nor deny this, since my focus shifted to Flutter. With my last changes I fixed in one hand the package's name detection (before it was in most cases just the technical package name) and a lookup for existing licenses to dedublicate licenses in the output file. To be honest I cannot remember all the details, but I think I just added some maps with a complexity of o(1) which should not make it significant slower.

However I can confirm that the builds seems to trend to become slower, but my observation is not related to this plugin.