Add links to check documentation in review

post/clang_tidy_review/clang_tidy_review/__init__.py

@@ -1085,6 +1085,29 @@ def set_output(key: str, val: str) -> bool:
     return True
 
 
+def decorate_comment_body(comment: str) -> str:
+    """
+    Split on first dash into two groups of string in [] at end of line
+    exception: if the first group starts with 'clang' such as 'clang-diagnostic-error'
+    exception to the exception: if the string starts with 'clang-analyzer', in which case, make it the first group
+    """
+    version = "extra"
+    url = f"https://clang.llvm.org/{version}/clang-tidy/checks"
+    regex = r"(\[((?:clang-analyzer)|(?:(?!clang)[\w]+))-([\.\w-]+)\]$)"
+    subst = f"[\\g<1>({url}/\\g<2>/\\g<3>.html)]"
+    return re.sub(regex, subst, comment, 1, re.MULTILINE)
+
+
+def decorate_comment(comment: PRReviewComment) -> PRReviewComment:
+    comment["body"] = decorate_comment_body(comment["body"])
+    return comment
+
+
+def decorate_comments(review: PRReview) -> PRReview:
+    review["comments"] = list(map(decorate_comment, review["comments"]))
+    return review
+
+
 def post_review(
     pull_request: PullRequest,
     review: Optional[PRReview],
@@ -1104,21 +1127,23 @@ def post_review(
 
     total_comments = len(review["comments"])
 
-    set_output("total_comments", total_comments)
+    set_output("total_comments", str(total_comments))
 
     print("Removing already posted or extra comments", flush=True)
     trimmed_review = cull_comments(pull_request, review, max_comments)
 
-    if trimmed_review["comments"] == []:
+    if not trimmed_review["comments"]:
         print("Everything already posted!")
         return total_comments
 
     if dry_run:
         pprint.pprint(review, width=130)
         return total_comments
 
-    print("Posting the review:\n", pprint.pformat(trimmed_review), flush=True)
-    pull_request.post_review(trimmed_review)
+    decorated_review = decorate_comments(trimmed_review)
+
+    print("Posting the review:\n", pprint.pformat(decorated_review), flush=True)
+    pull_request.post_review(decorated_review)
 
     return total_comments
 

tests/test_review.py

@@ -427,3 +427,38 @@ def test_config_file(monkeypatch, tmp_path):
         "not-clang-tidy", clang_tidy_checks="readability", config_file=""
     )
     assert flag == "--checks=readability"
+
+
+def test_decorate_comment_body():
+    # No link to generic error so the message shouldn't be changed
+    error_message = (
+        "warning: no member named 'ranges' in namespace 'std' [clang-diagnostic-error]"
+    )
+    assert ctr.decorate_comment_body(error_message) == error_message
+
+    todo_message = "warning: missing username/bug in TODO [google-readability-todo]"
+    todo_message_decorated = "warning: missing username/bug in TODO [[google-readability-todo](https://clang.llvm.org/extra/clang-tidy/checks/google/readability-todo.html)]"
+    assert ctr.decorate_comment_body(todo_message) == todo_message_decorated
+
+    naming_message = "warning: invalid case style for constexpr variable 'foo' [readability-identifier-naming]"
+    naming_message_decorated = "warning: invalid case style for constexpr variable 'foo' [[readability-identifier-naming](https://clang.llvm.org/extra/clang-tidy/checks/readability/identifier-naming.html)]"
+    assert ctr.decorate_comment_body(naming_message) == naming_message_decorated
+
+    clang_analyzer_message = "warning: Array access (from variable 'foo') results in a null pointer dereference [clang-analyzer-core.NullDereference]"
+    clang_analyzer_message_decorated = "warning: Array access (from variable 'foo') results in a null pointer dereference [[clang-analyzer-core.NullDereference](https://clang.llvm.org/extra/clang-tidy/checks/clang-analyzer/core.NullDereference.html)]"
+    assert (
+        ctr.decorate_comment_body(clang_analyzer_message)
+        == clang_analyzer_message_decorated
+    )
+
+    # Not sure it's necessary to link to prior version documentation especially since we have to map versions such as
+    # "17" to "17.0.1" and "18" to "18.1.0" because no other urls exist
+    # version_message_pre_15_version = "14.0.0"
+    # version_message_pre_15 = "warning: missing username/bug in TODO [google-readability-todo]"
+    # version_message_pre_15_decorated = "warning: missing username/bug in TODO [[google-readability-todo](https://releases.llvm.org/14.0.0/tools/clang/tools/extra/docs/clang-tidy/checks/google-readability-todo.html)]"
+    # assert ctr.decorate_comment_body(version_message_pre_15, version_message_pre_15_version) == version_message_pre_15_decorated
+    #
+    # version_message_1500_version = "15.0.0"
+    # version_message_1500 = "warning: missing username/bug in TODO [google-readability-todo]"
+    # version_message_1500_decorated = "warning: missing username/bug in TODO [[google-readability-todo](https://releases.llvm.org/15.0.0/tools/clang/tools/extra/docs/clang-tidy/checks/google/readability-todo.html)]"
+    # assert ctr.decorate_comment_body(version_message_1500, version_message_1500_version) == version_message_1500_decorated