[.github] - refactor: mention workflow author in slack (#8967)

* [.github] - refactor: simplify retrieval of commit author information in slack-notify action

 - Use the GitHub actor as the commit author name and email instead of extracting from the git log
 - Set the author email to a no-reply GitHub address associated with the GitHub actor

* [.github/.mailmap] - refactor: streamline mailmap and GitHub action for Slack notifications

 - Modified the GitHub action to look up the author email using the improved mailmap
 - Simplified the mailmap file to map GitHub usernames directly to their dust email addresses

* [.mailmap] - refactor: clean up trailing whitespace

 - Remove the unnecessary empty line at the end of the .mailmap file

.github/actions/slack-notify/action.yml

@@ -29,27 +29,20 @@ outputs:
 runs:
   using: "composite"
   steps:
-    - name: Get author email
+    - name: Get author info
       if: inputs.step == 'start'
       id: author
       shell: bash
       run: |
-        # Get last commit author name and email
-        AUTHOR_NAME=$(git log -1 --format='%an')
-        AUTHOR_EMAIL=$(git log -1 --format='%ae')
+        AUTHOR_NAME="${{ github.actor }}"
 
-        if ! CANONICAL=$(git check-mailmap "$AUTHOR_NAME <$AUTHOR_EMAIL>" 2>/dev/null); then
-          echo "email=$AUTHOR_EMAIL" >> $GITHUB_OUTPUT
-          echo "name=$AUTHOR_NAME" >> $GITHUB_OUTPUT
-          exit 0
+        if ! EMAIL=$(git check-mailmap "$AUTHOR_NAME" 2>/dev/null); then
+          echo "GitHub handle $AUTHOR_NAME not found in mailmap" >&2
+          exit 1
         fi
 
-        # Extract email and name from canonical form
-        CANONICAL_EMAIL=$(echo "$CANONICAL" | grep -o '<.*>' | tr -d '<>')
-        CANONICAL_NAME=$(echo "$CANONICAL" | sed 's/ <.*>//')
-
-        echo "email=$CANONICAL_EMAIL" >> $GITHUB_OUTPUT
-        echo "name=$CANONICAL_NAME" >> $GITHUB_OUTPUT
+        echo "email=$EMAIL" >> $GITHUB_OUTPUT
+        echo "name=$AUTHOR_NAME" >> $GITHUB_OUTPUT
 
     - name: Lookup by email
       if: inputs.step == 'start'

.mailmap

@@ -1,35 +1,15 @@
-Alban Dumouilla <[email protected]>
-Alban Dumouilla <[email protected]> <[email protected]>
-Alexandre Pinot <[email protected]>
-Alexandre Pinot <[email protected]> <[email protected]>
-Aubin Tchoi <[email protected]>
-Aubin Tchoi <[email protected]> <[email protected]>
-Aubin Tchoi <[email protected]> <[email protected]>
-Daphné Popin <[email protected]>
-Daphné Popin <[email protected]> <[email protected]>
-Daphné Popin <[email protected]> <[email protected]>
-Edouard Wautier <[email protected]>
-Edouard Wautier <[email protected]> <[email protected]>
-Flavien David <[email protected]>
-Flavien David <[email protected]> <[email protected]>
-Gabriel Hubert <[email protected]>
-Gabriel Hubert <[email protected]> <[email protected]>
-Henry Fontanier <[email protected]>
-Henry Fontanier <[email protected]> <[email protected]>
-Jules Belveze <[email protected]>
-Jules Belveze <[email protected]> <[email protected]>
-Jules Belveze <[email protected]> <[email protected]>
-Lucas Massemin <[email protected]>
-Lucas Massemin <[email protected]> <[email protected]>
-Pauline Pham <[email protected]>
-Pauline Pham <[email protected]> <[email protected]>
-Philippe Rolet <[email protected]>
-Philippe Rolet <[email protected]> <[email protected]>
-Sebastien Flory <[email protected]>
-Sebastien Flory <[email protected]> <[email protected]>
-Stanislas Polu <[email protected]>
-Stanislas Polu <[email protected]> <[email protected]>
-Thibault Martin <[email protected]>
-Thibault Martin <[email protected]> <[email protected]>
-Thomas Draier <[email protected]>
-Thomas Draier <[email protected]> <[email protected]>
+JulesBelveze [email protected]
+pinotalexandre [email protected]
+aubin-tchoi [email protected]
+PopDaph [email protected]
+Duncid [email protected]
+flavien [email protected]
+gabriel [email protected]
+henry [email protected]
+lucasmassemin [email protected]
+Yutcam [email protected]
+philipperolet [email protected]
+sflory [email protected]
+spolu [email protected]
+thib-martin [email protected]
+thomas [email protected]