spell-check: expand regex to split up [c|C]amelCase and Snake_Case.

.codespellrc

@@ -1,4 +1,5 @@
 [codespell]
-skip = .git,.gitlab-ci-local,*.eps,*.pdf,*.css_t,AUTHORS
+skip = .git,.gitlab-ci-local,*.eps,*.pdf,*.css_t,AUTHORS,*build*,*.mob
 ignore-words = ./utils/codespell-ignored-words
 exclude-file = ./utils/codespell-ignored-lines
+regex = (?<![a-z])[a-z']+|[A-Z][a-z']*|[a-z]+'[a-z]*|[a-z]+(?=[_-])|[a-z]+(?=[A-Z])|\d+

utils/tests/gitlab-ci-code-linting.yml

@@ -109,5 +109,14 @@ spell-check:
   before_script:
     - pip install codespell
   script:
-    - codespell ./
+    # Get commit messages
+    - if (git remote | grep -qw upstream) ; then
+      git remote set-url upstream https://gitlab.com/nsnam/ns-3-dev.git ;
+      else
+      git remote add upstream https://gitlab.com/nsnam/ns-3-dev.git ;
+      fi
+    - git fetch upstream master
+    - git log --pretty=%B HEAD...upstream/master ^upstream/master > git_messages.txt
+    # Check source code and commit messages
+    - codespell -f -C0 ./
   timeout: 1h