find virtual file for relative path under content roots

I extracted the code I use in my plugin to find files.

It compiles but you will need to debug it for specific conditions like fileType not found or invalid parameters:

public class PsiUtils {
    public static List<VirtualFile> findFileByRelativePath(@NotNull Project project, @NotNull String fileRelativePath) {
       String relativePath = fileRelativePath.startsWith("/") ? fileRelativePath : "/" + fileRelativePath;
        Set<FileType> fileTypes = Collections.singleton(FileTypeManager.getInstance().getFileTypeByFileName(relativePath));
        final List<VirtualFile> fileList = new ArrayList<>();
        FileBasedIndex.getInstance().processFilesContainingAllKeys(FileTypeIndex.NAME, fileTypes, GlobalSearchScope.projectScope(project), null, virtualFile -> {
           if (virtualFile.getPath().endsWith(relativePath)) {
              fileList.add(virtualFile);
           }
           return true;
        });
        return fileList;
     }
}
 

Thanks Vladimir... I iterated the content entries for each module, which works ok.

Your way may well be better... I'll bear it in mind.

Thanks again.

I think u need use java.io.File.separator than "/" for support other platforms like Mac OS.

VirtualFile uses '/' as the separator:

from VirtualFile.java:131-141:

 /**
 * Gets the path of this file. Path is a string which uniquely identifies file within given
 * <code>{@link VirtualFileSystem}</code>. Format of the path depends on the concrete file system.
 * For <code>{@link com.intellij.openapi.vfs.LocalFileSystem}</code> it is an absolute file path with file separator characters
 * (File.separatorChar) replaced to the forward slash ('/').
 *
 * @return the path
 */
 @SuppressWarnings("JavadocReference")
 @NotNull
 public abstract String getPath();

Just chiming in to say this was super useful. Thanks Vladimir!