Obtain release node name from Erlang VM instead of OS

priv/templates/extended_bin

@@ -260,6 +260,14 @@ relx_run_hooks() {
     done
 }
 
+find_erts_dir
+export ROOTDIR="$RELEASE_ROOT_DIR"
+export BINDIR="$ERTS_DIR/bin"
+export EMU="beam"
+export PROGNAME="erl"
+export LD_LIBRARY_PATH="$ERTS_DIR/lib:$LD_LIBRARY_PATH"
+ERTS_LIB_DIR="$(dirname "$ERTS_DIR")/lib"
+
 VMARGS_PATH=$(add_path vm.args $VMARGS_PATH)
 # Extract the target node name from node.args
 NAME_ARG=$(egrep '^-s?name' "$VMARGS_PATH" || true)
@@ -280,7 +288,7 @@ NAME="$(echo "$NAME_ARG" | awk '{print $2}')"
 # So here we check for @ and add @hostname if missing
 case "${NAME}" in
     *@*) ;;                             # Nothing to do
-    *)   NAME=${NAME}@$(hostname -s);;  # Add @hostname
+    *)   NAME=${NAME}@$(relx_get_nodename);;  # Add @hostname
 esac
 
 # Export the variable so that it's available in the 'eval' calls
@@ -309,14 +317,6 @@ else
     COOKIE="$(echo "$COOKIE_ARG" | awk '{print $2}')"
 fi
 
-find_erts_dir
-export ROOTDIR="$RELEASE_ROOT_DIR"
-export BINDIR="$ERTS_DIR/bin"
-export EMU="beam"
-export PROGNAME="erl"
-export LD_LIBRARY_PATH="$ERTS_DIR/lib:$LD_LIBRARY_PATH"
-ERTS_LIB_DIR="$(dirname "$ERTS_DIR")/lib"
-
 cd "$ROOTDIR"
 
 # Check the first argument for instructions

test/rlx_extended_bin_SUITE.erl

@@ -23,6 +23,7 @@
          init_per_testcase/2,
          all/0,
          ping/1,
+         shortname_ping/1,
          attach/1,
          pid/1,
          restart/1,
@@ -62,9 +63,8 @@ init_per_testcase(_, Config) ->
      {state, State1} | Config].
 
 all() ->
-    [ping, attach, pid, restart, reboot, escript,
-     remote_console, replace_os_vars,
-     replace_os_vars_dev_mode, replace_os_vars_twice,
+    [ping, shortname_ping, attach, pid, restart, reboot, escript,
+     remote_console, replace_os_vars, replace_os_vars_dev_mode, replace_os_vars_twice,
      custom_start_script_hooks, builtin_wait_for_vm_start_script_hook,
      builtin_pid_start_script_hook, builtin_wait_for_process_start_script_hook,
      mixed_custom_and_builtin_start_script_hooks].
@@ -102,6 +102,45 @@ ping(Config) ->
     %% a ping should fail after stopping a node
     {error, 1, _} = sh(filename:join([OutputDir, "foo", "bin", "foo ping"])).
 
+shortname_ping(Config) ->
+    LibDir1 = proplists:get_value(lib1, Config),
+
+    rlx_test_utils:create_app(LibDir1, "goal_app", "0.0.1", [stdlib,kernel], []),
+
+    ConfigFile = filename:join([LibDir1, "relx.config"]),
+    VmArgs = filename:join([LibDir1, "vm.args"]),
+
+    rlx_test_utils:write_config(ConfigFile,
+                 [{release, {foo, "0.0.1"},
+                   [goal_app]},
+                  {lib_dirs, [filename:join(LibDir1, "*")]},
+                  {vm_args, VmArgs},
+                  {generate_start_script, true},
+                  {extended_start_script, true}
+                 ]),
+
+    ec_file:write(VmArgs, "-sname foo\n\n"
+                          "-setcookie cookie\n"),
+
+    OutputDir = filename:join([proplists:get_value(priv_dir, Config),
+                               rlx_test_utils:create_random_name("relx-output")]),
+
+    {ok, _State} = relx:do([{relname, foo},
+                           {relvsn, "0.0.1"},
+                           {goals, []},
+                           {lib_dirs, [LibDir1]},
+                           {log_level, 3},
+                           {output_dir, OutputDir},
+                           {config, ConfigFile}], ["release"]),
+
+    %% now start/stop the release to make sure the extended script is working
+    {ok, _} = sh(filename:join([OutputDir, "foo", "bin", "foo start"])),
+    timer:sleep(2000),
+    {ok, "pong"} = sh(filename:join([OutputDir, "foo", "bin", "foo ping"])),
+    {ok, _} = sh(filename:join([OutputDir, "foo", "bin", "foo stop"])),
+    %% a ping should fail after stopping a node
+    {error, 1, _} = sh(filename:join([OutputDir, "foo", "bin", "foo ping"])).
+
 attach(Config) ->
     LibDir1 = proplists:get_value(lib1, Config),