Still use a regular expression for the FIXME check

We need to be able to match multiple words (e.g. fixme and todo) but we should
not catch strings such as `TODOIST`. The previous implementation was using a `startswith`
between the notes and the string tokens but that matches Todoist as well.

Close #2707

2 files changed, 32 insertions, 8 deletions

diff --git a/pylint/checkers/misc.py b/pylint/checkers/misc.py
index 6c17918f6..a06b9a181 100644
--- a/pylint/checkers/misc.py
+++ b/pylint/checkers/misc.py
@@ -22,6 +22,8 @@
 
 import tokenize
 
+import re
+
 from pylint.interfaces import IRawChecker, ITokenChecker
 from pylint.checkers import BaseChecker
 from pylint.utils import OPTION_RGX, MessagesHandlerMixIn
@@ -103,6 +105,12 @@ class EncodingChecker(BaseChecker):
         ),
     )
 
+    def open(self):
+        super().open()
+        self._fixme_pattern = re.compile(
+            r"#\s*(%s)\b" % "|".join(map(re.escape, self.config.notes)), re.I
+        )
+
     def _check_encoding(self, lineno, line, file_encoding):
         try:
             return line.decode(file_encoding)
@@ -157,14 +165,15 @@ class EncodingChecker(BaseChecker):
                     continue
 
             # emit warnings if necessary
-            for note in self.config.notes:
-                if comment_text.lower().startswith(note.lower()):
-                    self.add_message(
-                        "fixme",
-                        args=comment_text,
-                        line=comment.start[0],
-                        col_offset=comment.string.lower().index(note.lower()),
-                    )
+            match = self._fixme_pattern.search("#" + comment_text.lower())
+            if match:
+                note = match.group(1)
+                self.add_message(
+                    "fixme",
+                    col_offset=comment.string.lower().index(note.lower()),
+                    args=comment_text,
+                    line=comment.start[0],
+                )
 
 
 def register(linter):
diff --git a/pylint/test/unittest_checker_misc.py b/pylint/test/unittest_checker_misc.py
index 3dce3d721..3fe49628d 100644
--- a/pylint/test/unittest_checker_misc.py
+++ b/pylint/test/unittest_checker_misc.py
@@ -86,3 +86,18 @@ class TestFixme(CheckerTestCase):
             Message(msg_id="fixme", line=1, args="TODO this should not trigger a fixme")
         ):
             self.checker.process_tokens(_tokenize_str(code))
+
+    def test_dont_trigger_on_todoist(self):
+        code = """
+        # Todoist API: What is this task about?
+        # Todoist API: Look up a task's due date
+        # Todoist API: Look up a Project/Label/Task ID
+        # Todoist API: Fetch all labels
+        # Todoist API: "Name" value
+        # Todoist API: Get a task's priority
+        # Todoist API: Look up the Project ID a Task belongs to
+        # Todoist API: Fetch all Projects
+        # Todoist API: Fetch all Tasks
+        """
+        with self.assertNoMessages():
+            self.checker.process_tokens(_tokenize_str(code))