Encforce tag descriptions in tfw.sh releasetfw

hack/tfw.sh

@@ -39,7 +39,9 @@ release_baseimage()
     read -p "Tag and push new TFW version \"${TAG}\"? [y/N]" -r && echo
     if [[ $REPLY =~ ^(y|Y|yes|Yes|YES)$ ]]
     then
-        TAG="$TAG" force_push_tag
+        description=""
+        prompt_for_tag_description # This command overwrites $description
+        TAG="$TAG" DESCRIPTION="$description" force_push_tag
     fi
 }
 
@@ -54,11 +56,33 @@ check_drone_releasename()
     fi
 }
 
+prompt_for_tag_description()
+{
+    editor="$(git config --global core.editor)"
+    tempfile="$(mktemp)"
+
+    printf "\n\n" >> "$tempfile"
+    echo "# Please enter the description for this release." >> "$tempfile"
+    echo "# Lines starting with '#' will be ignored." >> "$tempfile"
+    echo "# An empty description aborts the release." >> "$tempfile"
+
+    $editor "$tempfile"
+    sed -i -e 's/#.*$//' -e '/^$/d' "$tempfile"
+    sed -i 's/\n/ /g' "$tempfile"
+    if [[ ! -s "$tempfile" ]]; then
+        echo "Aborting release due to empty description."
+        exit 1
+    fi
+
+    description="$(tr '\n' ' ' < "$tempfile")"
+    rm "$tempfile"
+}
+
 force_push_tag()
 {
     git tag -d "$TAG" > /dev/null 2>&1 || :
     git push --delete origin "$TAG" > /dev/null 2>&1 || :
-    git tag -s -m "TFW version $TAG released at $(date '+%H:%M:%S %Y-%m-%d')" "$TAG"
+    git tag -s -m "$DESCRIPTION" "$TAG"
     git push origin "$TAG"
 }