SegmentRange: more explicit slice matching (#31451)

* more explicit

* fix it

* use non capturing group

* only needed for regex101

* make test_logreader.py executable

* fix

* stash

* passes test

* none

* type anotate

* test

* fix

* nice for syntax highlighting

tools/lib/helpers.py

@@ -15,7 +15,7 @@ class RE:
 
   INDEX = r'-?[0-9]+'
   SLICE = r'(?P<start>{})?:?(?P<end>{})?:?(?P<step>{})?'.format(INDEX, INDEX, INDEX)
-  SEGMENT_RANGE = r'{}(?:--|/)?(?P<slice>({}))?/?(?P<selector>([qras]))?'.format(ROUTE_NAME, SLICE)
+  SEGMENT_RANGE = r'{}(?:(--|/)(?P<slice>({})))?(?:/(?P<selector>([qras])))?'.format(ROUTE_NAME, SLICE)
 
   BOOTLOG_NAME = ROUTE_NAME
 

tools/lib/route.py

@@ -265,7 +265,11 @@ class SegmentRange:
 
   @property
   def _slice(self) -> str:
-    return self.m.group("slice")
+    return self.m.group("slice") or ""
+
+  @property
+  def selector(self) -> str | None:
+    return self.m.group("selector")
 
   @property
   def seg_idxs(self) -> list[int]:
@@ -286,10 +290,6 @@ class SegmentRange:
     else:
       return list(range(end + 1))[s]
 
-  @property
-  def selector(self) -> str:
-    return self.m.group("selector")
-
   def __str__(self) -> str:
     return f"{self.dongle_id}/{self.timestamp}" + (f"/{self._slice}" if self._slice else "") + (f"/{self.selector}" if self.selector else "")
 

tools/lib/tests/test_logreader.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import shutil
 import tempfile
 import os
@@ -83,6 +84,9 @@ class TestLogReader(unittest.TestCase):
     (f"{TEST_ROUTE}/j",),
     (f"{TEST_ROUTE}/0:1:2:3",),
     (f"{TEST_ROUTE}/:::3",),
+    (f"{TEST_ROUTE}3",),
+    (f"{TEST_ROUTE}-3",),
+    (f"{TEST_ROUTE}--3a",),
   ])
   def test_bad_ranges(self, segment_range):
     with self.assertRaises(AssertionError):