fix: allow single quotes in conanfile.py

src/conan_check_updates/conan.py

@@ -173,6 +173,14 @@ def version_str() -> str:
 _REQUIRES_ATTRIBUTES = ("requires", "build_requires", "tool_requires", "test_requires")
 
 
+def dequote(s: str) -> str:
+    """If a string has single or double quotes around it, remove them."""
+    min_length = 2
+    if (len(s) >= min_length and s[0] == s[-1]) and s.startswith(("'", '"')):
+        return s[1:-1]
+    return s
+
+
 def inspect_requirements_conanfile_py(conanfile: Path) -> List[ConanReference]:
     """Get requirements from requirements() method of conanfile.py"""
     assert conanfile.name == "conanfile.py"
@@ -185,9 +193,10 @@ def inspect_requirements_conanfile_py(conanfile: Path) -> List[ConanReference]:
             # ignore empty line or line comments
             if not line or line.startswith("#"):
                 continue
-            res = re.search(r'self\.(?:tool_)*requires\("(.*)"\)', line)
+            res = re.search(r"self\.(?:tool_)*requires\((.*)\)", line)
             if res:
-                ref = res.group(1)
+                args = res.group(1)
+                ref = dequote(args)
                 if len(ref) > 0:
                     refs.append(ref)
     return list(map(ConanReference.parse, refs))

tests/conanfile.py

@@ -16,7 +16,7 @@ class Example(ConanFile):
 
     def requirements(self):
         self.requires("openssl/3.2.0")
-        self.requires("nanodbc/2.13.0")
+        self.requires('nanodbc/2.13.0')  # fmt:off
         self.requires("ms-gsl/3.1.0")
         self.tool_requires("cmake/3.27.7")
         # self.requires("quill/3.6.0")