ci: integrate coverage into linux arch job, remove duplicate

- Linux arch job now uploads coverage.info as artifact
- ci-build.sh saves coverage.info before cleanup
- Removed separate coverage job (was duplicating arch build)
- Saves ~25% CI time by eliminating redundant build

ci-build.sh

@@ -110,6 +110,17 @@ num_cores()
 # Run test failure detection verification first
 verify_test_failure_detection
 
+# Parse arguments
+COVERAGE_ONLY=no
+for arg in "$@"; do
+    case "$arg" in
+        --coverage-only)
+            COVERAGE_ONLY=yes
+            shift
+            ;;
+    esac
+done
+
 ./bootstrap.sh
 
 tests=()
@@ -286,6 +297,13 @@ build_and_test() {
         fi
 
         ./profanity -v
+
+        # Save coverage.info before cleanup (for CI artifact)
+        if [ "$run_coverage" = "yes" ] && [ -f coverage.info ]; then
+            cp coverage.info ../coverage.info
+            echo "Coverage report saved to coverage.info"
+        fi
+
         $MAKE clean
 
         cd ..
@@ -300,40 +318,52 @@ build_and_test() {
     } > "$log_file" 2>&1
 }
 
-# Run all 4 configurations in parallel
+# Run configurations
 # Coverage enabled only for build 1 (Full) - it has most code paths
 echo
 echo "=== Start build ==="
 echo
-echo "Starting 4 parallel build configurations..."
-echo
-pids=()
-for idx in 1 2 3 4; do
-    if [ $idx -le ${#tests[@]} ]; then
-        # All builds run Valgrind
-        if [ "$ARCH" = "linux" ]; then
-            run_valgrind="yes"
-            if [ $idx -eq 1 ]; then
-                extra_flags="--enable-valgrind --enable-coverage"
-                run_coverage="yes"
+
+if [ "$COVERAGE_ONLY" = "yes" ]; then
+    echo "Running coverage-only mode (build 1 only)..."
+    echo
+    run_valgrind="no"
+    run_coverage="yes"
+    extra_flags="--enable-coverage"
+    build_and_test "${tests[0]}" "$* $extra_flags" "1" "$run_valgrind" "$run_coverage" &
+    pids=("$!")
+    echo "  → Build 1: ${tests[0]} [+Coverage]"
+else
+    echo "Starting 4 parallel build configurations..."
+    echo
+    pids=()
+    for idx in 1 2 3 4; do
+        if [ $idx -le ${#tests[@]} ]; then
+            # All builds run Valgrind
+            if [ "$ARCH" = "linux" ]; then
+                run_valgrind="yes"
+                if [ $idx -eq 1 ]; then
+                    extra_flags="--enable-valgrind --enable-coverage"
+                    run_coverage="yes"
+                else
+                    extra_flags="--enable-valgrind"
+                    run_coverage="no"
+                fi
             else
-                extra_flags="--enable-valgrind"
+                extra_flags=""
+                run_valgrind="no"
                 run_coverage="no"
             fi
-        else
-            extra_flags=""
-            run_valgrind="no"
-            run_coverage="no"
+            build_and_test "${tests[$((idx-1))]}" "$* $extra_flags" "$idx" "$run_valgrind" "$run_coverage" &
+            pids+=("$!")
+            flags_desc=""
+            [ "$run_valgrind" = "yes" ] && flags_desc="Valgrind"
+            [ "$run_coverage" = "yes" ] && flags_desc="${flags_desc:+$flags_desc+}Coverage"
+            [ -n "$flags_desc" ] && flags_desc=" [+$flags_desc]"
+            echo "  → Build $idx: ${tests[$((idx-1))]}$flags_desc"
         fi
-        build_and_test "${tests[$((idx-1))]}" "$* $extra_flags" "$idx" "$run_valgrind" "$run_coverage" &
-        pids+=("$!")
-        flags_desc=""
-        [ "$run_valgrind" = "yes" ] && flags_desc="Valgrind"
-        [ "$run_coverage" = "yes" ] && flags_desc="${flags_desc:+$flags_desc+}Coverage"
-        [ -n "$flags_desc" ] && flags_desc=" [+$flags_desc]"
-        echo "  → Build $idx: ${tests[$((idx-1))]}$flags_desc"
-    fi
-done
+    done
+fi
 echo
 
 # Wait for all builds and check exit codes
@@ -389,5 +419,9 @@ if [ ${#failed_builds[@]} -gt 0 ]; then
     echo "RESULT: FAILED (builds ${failed_builds[*]})"
     exit 1
 else
-    echo "RESULT: ALL 4 BUILDS PASSED ✓"
+    if [ "$COVERAGE_ONLY" = "yes" ]; then
+        echo "RESULT: COVERAGE BUILD PASSED ✓"
+    else
+        echo "RESULT: ALL 4 BUILDS PASSED ✓"
+    fi
 fi