fix handling of pep440 with epoch, e.g. '1!2.3'

src/bumpver/patterns.py

@@ -17,6 +17,7 @@ RE_PATTERN_ESCAPES = [
     ("\u005c", "\u005c\u005c"),
     ("-"     , "\u005c-"),
     ("."     , "\u005c."),
+    ("!"     , "\u005c!"),
     ("+"     , "\u005c+"),
     ("*"     , "\u005c*"),
     ("?"     , "\u005c?"),

src/bumpver/v2patterns.py

@@ -239,7 +239,7 @@ def _convert_to_pep440(version_pattern: str) -> str:
     pep440_pattern = pep440_pattern.replace(r"\[", "")
     pep440_pattern = pep440_pattern.replace(r"\]", "")
 
-    pep440_pattern, _ = re.subn(r"[^a-zA-Z0-9\.\[\]]", "", pep440_pattern)
+    pep440_pattern, _ = re.subn(r"[^a-zA-Z0-9\.\!\[\]]", "", pep440_pattern)
 
     part_names = list(PATTERN_PART_FIELDS.keys())
     part_names.sort(key=len, reverse=True)

test/test_patterns.py

@@ -251,6 +251,24 @@ def test_v2_patterns(pattern_str, line, expected):
     assert result_val == expected, (pattern_str, line, pattern.regexp.pattern)
 
 
+def test_epoch_pattern():
+    raw_pattern = v2patterns.normalize_pattern("v1!MAJOR.MINOR.PATCH", "{version}")
+    pattern     = v2patterns.compile_pattern(raw_pattern)
+
+    result     = pattern.regexp.search('current_version = "v1!2.1.5"')
+    result_val = None if result is None else result.group(0)
+    assert result_val == "v1!2.1.5"
+
+
+def test_epoch_pep440_pattern():
+    raw_pep440_pattern = v2patterns.normalize_pattern("v1!MAJOR.MINOR.PATCH", "{pep440_version}")
+    pep440_pattern     = v2patterns.compile_pattern(raw_pep440_pattern)
+
+    result     = pep440_pattern.regexp.search('version = "1!2.1.5"')
+    result_val = None if result is None else result.group(0)
+    assert result_val == "1!2.1.5"
+
+
 CLI_MAIN_FIXTURE = """
 @click.group()
 @click.version_option(version="v201812.0123-beta")