Cannot access input property sourceLinks.localDirectory

[IgnatBeresnev]

Supposedly, because GradleSourceLinkBuilder#localDirectory is marked as InputDirectory, it keeps track of all the files within this directory so that it can mark the task as out-of-date if anything changes.

However, when localDirectory is targeting a directory with a lot of files (like the whole of the standard library), it can cause the following exceptions:

Cannot access input property 'unsuppressedSourceSets.$0.sourceLinks.$0.localDirectory' of task ':stdlib_1.0'
java.io.UncheckedIOException: Failed to create MD5 hash for file content.
        at org.gradle.internal.hash.DefaultStreamHasher.hash(DefaultStreamHasher.java:37)
        at org.gradle.internal.hash.DefaultFileHasher.hash(DefaultFileHasher.java:41)
        at org.gradle.api.internal.changedetection.state.CachingFileHasher.snapshot(CachingFileHasher.java:94)
        at org.gradle.api.internal.changedetection.state.CachingFileHasher.hash(CachingFileHasher.java:76)
        at org.gradle.api.internal.changedetection.state.SplitFileHasher.hash(SplitFileHasher.java:54)
        at org.gradle.internal.snapshot.impl.DirectorySnapshotter$PathVisitor.snapshotFile(DirectorySnapshotter.java:347)
        .....
Caused by: java.io.IOException: The process cannot access the file because another process has locked a portion of the file
        at java.io.FileInputStream.readBytes(Native Method)
        at java.io.FileInputStream.read(FileInputStream.java:233)
        at org.gradle.internal.hash.DefaultStreamHasher.doHash(DefaultStreamHasher.java:52)
        at org.gradle.internal.hash.DefaultStreamHasher.hash(DefaultStreamHasher.java:35)
        ... 120 more 

These exceptions do not stop the build, but they slow it down considerably.

Should be reproducible on https://github.com/vmishenev/kotlin/tree/update-dokka/libraries/tools/kotlin-stdlib-docs

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This property is only used for getting the absolute path of the source files in order to add source links to signatures. I can see no reason for why it should be responsible for making Dokka tasks out of date.

That being said, maybe @InputDirectory could be dropped in favor of something simpler.