New option --list-components

Add an option to list the available components.

This is not useful yet, but a subsequent commit will add the ability
to run specific components.

tests/scripts/all.sh

@@ -106,6 +106,7 @@ pre_initialize_variables () {
 
     MEMORY=0
     FORCE=0
+    INTROSPECTION_MODE=
     KEEP_GOING=0
     RUN_ARMCC=1
 
@@ -131,7 +132,11 @@ usage()
 {
     cat <<EOF
 Usage: $0 [OPTION]...
-  -h|--help             Print this help.
+Run mbedtls release validation tests.
+
+Special options:
+  -h|--help             Print this help and exit.
+  --list-components     List available test components and exit.
 
 General options:
   -f|--force            Force the tests to overwrite any modified files.
@@ -257,6 +262,7 @@ pre_parse_command_line () {
               --gnutls-serv) shift; GNUTLS_SERV="$1";;
               --help|-h) usage; exit;;
               --keep-going|-k) KEEP_GOING=1;;
+              --list-components) INTROSPECTION_MODE=list_components;;
               --memory|-m) MEMORY=1;;
               --no-armcc) RUN_ARMCC=0;;
               --no-force) FORCE=0;;
@@ -1143,6 +1149,18 @@ run_component () {
 pre_check_environment
 pre_initialize_variables
 pre_parse_command_line "$@"
+
+case "$INTROSPECTION_MODE" in
+    list_components)
+        components=
+        newline='
+'
+        run_component () {
+            components="${components}${newline}${1}"
+        }
+        ;;
+
+    *)
         pre_check_git
         build_status=0
         if [ $KEEP_GOING -eq 1 ]; then
@@ -1156,6 +1174,8 @@ pre_print_configuration
         pre_check_tools
         pre_print_tools
         cleanup
+        ;;
+esac
 
 # Small things
 run_component component_check_recursion
@@ -1226,4 +1246,11 @@ run_component component_check_python_files
 run_component component_check_generate_test_code
 
 # We're done.
+case "$INTROSPECTION_MODE" in
+    list_components)
+        echo "$components" | sort
+        ;;
+    *)
         post_report
+        ;;
+esac