Strip `None` values from symcache dict before TOML write

(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code

Note that (again) this patch was orig by @dnks and broken out from
a larger commit which added unnecessary/out-of-scope changes we didn't
end up requiring.

.gitignore

@@ -102,7 +102,6 @@ ENV/
 
 # mypy
 .mypy_cache/
-.vscode/settings.json
 
 # all files under
 .git/
@@ -122,6 +121,9 @@ Session.vim
 # wtv git hosting service tho?
 gitea/
 
+# ------ tina-land ------
+.vscode/settings.json
+
 # ------ macOS ------
 # Finder metadata
 **/.DS_Store

piker/data/_symcache.py

@@ -105,6 +105,15 @@ class SymbologyCache(Struct):
 
     def write_config(self) -> None:
 
+        def clean_dict_for_toml(d):
+            '''Remove None values from dict recursively for TOML serialization'''
+            if isinstance(d, dict):
+                return {k: clean_dict_for_toml(v) for k, v in d.items() if v is not None}
+            elif isinstance(d, list):
+                return [clean_dict_for_toml(item) for item in d if item is not None]
+            else:
+                return d
+
         # put the backend's pair-struct type ref at the top
         # of file if possible.
         cachedict: dict[str, Any] = {
@@ -125,7 +134,9 @@ class SymbologyCache(Struct):
 
             dct = cachedict[key] = {}
             for key, struct in table.items():
-                dct[key] = struct.to_dict(include_non_members=False)
+                raw_dict = struct.to_dict(include_non_members=False)
+                # Clean None values for TOML compatibility
+                dct[key] = clean_dict_for_toml(raw_dict)
 
         try:
             with self.fp.open(mode='wb') as fp:

piker/fsp/_api.py

@@ -200,9 +200,13 @@ def maybe_mk_fsp_shm(
     )
 
     # (attempt to) uniquely key the fsp shm buffers
+    # Use hash for macOS compatibility (31 char limit)
+    import hashlib
     actor_name, uuid = tractor.current_actor().uid
-    uuid_snip: str = uuid[:16]
-    key: str = f'piker.{actor_name}[{uuid_snip}].{sym}.{target.name}'
+    # Create short hash of sym and target name
+    content = f'{sym}.{target.name}'
+    content_hash = hashlib.md5(content.encode()).hexdigest()[:8]
+    key: str = f'{uuid[:8]}_{content_hash}.fsp'
 
     shm, opened = maybe_open_shm_array(
         key,

piker/tsp/_history.py

@@ -32,6 +32,7 @@ from __future__ import annotations
 from datetime import datetime
 from functools import partial
 from pathlib import Path
+import platform
 from pprint import pformat
 from types import ModuleType
 from typing import (
@@ -1380,13 +1381,20 @@ async def manage_history(
     service: str = name.rstrip(f'.{mod.name}')
     fqme: str = mkt.get_fqme(delim_char='')
 
+    key: str = f'piker.{service}[{uuid[:16]}].{fqme}'
+    # use a short hash of the `fqme` to deal with macOS
+    # file-name-len limit..
+    if platform.system() == 'Darwin':
+        import hashlib
+        fqme_hash: str = hashlib.md5(fqme.encode()).hexdigest()[:8]
+        key: str = f'{uuid[:8]}_{fqme_hash}'
+
     # (maybe) allocate shm array for this broker/symbol which will
     # be used for fast near-term history capture and processing.
     hist_shm, opened = maybe_open_shm_array(
         size=_default_hist_size,
         append_start_index=_hist_buffer_start,
-
-        key=f'piker.{service}[{uuid[:16]}].{fqme}.hist',
+        key=f'{key}.hist',
 
         # use any broker defined ohlc dtype:
         dtype=getattr(mod, '_ohlc_dtype', def_iohlcv_fields),
@@ -1405,7 +1413,7 @@ async def manage_history(
     rt_shm, opened = maybe_open_shm_array(
         size=_default_rt_size,
         append_start_index=_rt_buffer_start,
-        key=f'piker.{service}[{uuid[:16]}].{fqme}.rt',
+        key=f'{key}.rt',
 
         # use any broker defined ohlc dtype:
         dtype=getattr(mod, '_ohlc_dtype', def_iohlcv_fields),

piker/ui/_display.py

@@ -214,7 +214,8 @@ async def increment_history_view(
     hist_chart: ChartPlotWidget = ds.hist_chart
     hist_viz: Viz = ds.hist_viz
     # viz: Viz = ds.viz
-    assert 'hist' in hist_viz.shm.token['shm_name']
+    # Ensure the "history" shm-buffer is what's reffed.
+    assert hist_viz.shm.token['shm_name'].endswith('.hist')
     # name: str = hist_viz.name
 
     # TODO: seems this is more reliable at keeping the slow