matrei opened a new issue, #16537:
URL: https://github.com/apache/grails-core/issues/16537
Since 8.0.0, `generateTagLibraryIndex` reads tag libraries before
compilation and resolves the project types they refer to from source. When
anything it follows refers to a nested class declared in the project, the tag
library is skipped:
```
> Task :generateTagLibraryIndex
Tag library index: could not read CampfireTagLib.groovy before compilation;
their tags resolve dynamically until they are compiled.
```
The nested class does not have to be referenced from the tag library itself.
Here the tag library injects a service, which leads to a class with a method
declared as `CableConnection.Subscription authorize(...)`. That is enough.
The packaged index written by `packageTagLibraryIndex` after compilation is
unaffected, so pages still compile against a complete index. What is lost is
the pre-compile index: the tag library's namespace is recorded as incomplete,
so calls to its tags get no misspelling diagnostics. The message also appears
on every build.
### Cause
`TagLibraryIndexGenerator.SourceRootClassNodeResolver` maps the requested
class name directly to a file name. Groovy asks for a nested class by its
binary name, `campfire.cable.CableConnection$Subscription`, so the resolver
looks for `campfire/cable/CableConnection$Subscription.groovy`, which never
exists. The lookup fails. Resolving the outer class `CableConnection`
afterwards comes too late for the nested class to be found.
### Reproduce
`src/main/groovy/com/example/Connection.groovy`:
```groovy
package com.example
class Connection {
static class Subscription {
}
}
```
`src/main/groovy/com/example/Channels.groovy`:
```groovy
package com.example
class Channels {
Connection.Subscription authorize(String identifier) { null }
}
```
`grails-app/taglib/NestingTagLib.groovy`:
```groovy
import com.example.Channels
class NestingTagLib {
static namespace = 'nesting'
Channels channels
def show = { attrs -> }
}
```
Running `./gradlew generateTagLibraryIndex` prints the message above, and
`build/generated/grails-taglibs` contains only `incomplete.properties`.
**Version:** 8.0.0 (also current `8.0.x`)
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