chore(ci): better reporting

.github/workflows/build.yaml

@@ -39,11 +39,24 @@ jobs:
           mkdir ../.minemacs.d/
           cp .github/workflows/test-confs/modules-all.el ../.minemacs.d/modules.el
           echo "Running Emacs with MinEmacs configuration"
-          RUN_DATA=$(MINEMACS_VERBOSE=1 MINEMACS_CI=1 HOME=$GITHUB_WORKSPACE/.. emacs -nw --batch --script init.el 2>&1 && "Emacs exited successfully" || echo "Emacs exited with non-zero code $?")
+          if RUN_DATA=$(MINEMACS_VERBOSE=1 MINEMACS_CI=1 HOME=$GITHUB_WORKSPACE/.. emacs -nw --batch --script init.el 2>&1); then
+            echo "Emacs exited successfully"
+          else
+            echo "Emacs exited with non-zero code $?"
+          fi
           echo "Emacs complete output"
           echo "$RUN_DATA"
           WARNINGS=$(echo "$RUN_DATA" | grep Warning | sed -E 's/^(.*\.el): Warning/- \*\*\1\*\*/' | sed -E 's/^Warning ([^:]*)/- \*\*\1\*\*/')
           LOAD_ERRORS=$(echo "$RUN_DATA" | grep -E "(Cannot load)|(Not found)" | sed 's/^/- /')
           ELISP_ERRORS=$(echo "$RUN_DATA" | awk -F': ' '/^Debugger entered--Lisp error: / { print "- **" $1 "**: `" $2 "`"; print "```elisp"; while (getline && match($0, "^[[:space:]]{2}")) print $0; print "```"}' )
-          echo -e "# MinEmacs report ($EMACS_VERSION)\n## Loading errors\n$LOAD_ERRORS\n## Emacs Lisp errors\n$ELISP_ERRORS\n## Warnings\n$WARNINGS" >> $GITHUB_STEP_SUMMARY
+          echo -e "# MinEmacs report ($EMACS_VERSION)\n" >> $GITHUB_STEP_SUMMARY
+          if [[ ! -z "$LOAD_ERRORS" ]]; then
+            echo -e "## Loading errors\n$LOAD_ERRORS\n" >> $GITHUB_STEP_SUMMARY
+          fi
+          if [[ ! -z "$ELISP_ERRORS" ]]; then
+            echo -e "## Emacs Lisp errors\n$ELISP_ERRORS\n" >> $GITHUB_STEP_SUMMARY
+          fi
+          if [[ ! -z "$WARNINGS" ]]; then
+            echo -e "## Warnings\n$WARNINGS" >> $GITHUB_STEP_SUMMARY
+          fi
           if [[ ! -z "$LOAD_ERRORS" ]] || [[ ! -z "$ELISP_ERRORS" ]]; then exit 1; fi