Workaround bibtex race condition due to delayed persistance

Calling `bib_cache.get()` directly after `bib_cache.set()` may raise
FileNotFoundError as cache is stored on disk via background threads
and `.get()` trying to validate cache file's modification time stamp.

This commit therefore teaches `.set()` to directly return cache values
from RAM, which are about to being saved to disk. Validating modification
time would be redundant anyway.

Note: The whole plugin and caching infrastructure is a hopeless mess!

Author: deathaxe

latextools/utils/bibcache.py

@@ -64,6 +64,8 @@ def _write_bib_cache():
             self._dirty = True
         self._schedule_save()
 
+        return formatted_entries[1]
+
     def cache(self, func):
         try:
             return self.get()

plugins/bibliography/new_bibliography.py

@@ -148,8 +148,7 @@ def get_entries(self, *bib_files):
                     logger.info("Loaded %d bibitems", len(bib_entries))
 
                     try:
-                        bib_cache.set(bib_entries)
-                        fmt_entries = bib_cache.get()
+                        fmt_entries = bib_cache.set(bib_entries)
                         entries.extend(fmt_entries)
                     except Exception:
                         traceback.print_exc()

plugins/bibliography/traditional_bibliography.py

@@ -103,8 +103,7 @@ def get_entries(self, *bib_files):
                     logger.info("Loaded %d bibitems", len(bib_entries))
 
                     try:
-                        bib_cache.set(bib_entries)
-                        fmt_entries = bib_cache.get()
+                        fmt_entries = bib_cache.set(bib_entries)
                         entries.extend(fmt_entries)
                     except Exception:
                         traceback.print_exc()