Allow to specify a path to vm.args through command-line arguments

4 files changed, 11 insertions, 1 deletions

diff --git a/README.md b/README.md
index 7c68dfb..9e7217c 100644
--- a/README.md
+++ b/README.md
@@ -80,6 +80,7 @@ Options
 | -a    | --override_app | string | | An app name and a directory to override in the form appname:dir |
 | -c    | --config     | string  | ./relx.config | Config file path |
 |       | --overlay_vars     | string  |  | Path to a file of overlay variables |
+|       | --vm_args     | string  |  | Path to a file to use for vm.args |
 |       | --sys_config     | string  |  | Path to a file to use for sys.config |
 | -d    | --dev-mode     | boolean | false | Symlink all applications and configuration into the release instead of copying|
 | -i    | --include-erts | boolean/string | true | If true include a copy of erts used to build with, if a path include erts at that path. If false, do not include erts |
diff --git a/src/relx.erl b/src/relx.erl
index 37918be..433e0a5 100644
--- a/src/relx.erl
+++ b/src/relx.erl
@@ -210,6 +210,7 @@ opt_spec_list() ->
       "Provide an app name and a directory to override in the form <appname>:<app directory>"},
      {config, $c, "config", {string, ""}, "The path to a config file"},
      {overlay_vars, undefined, "overlay_vars", string, "Path to a file of overlay variables"},
+     {vm_args, undefined, "vm_args", string, "Path to a file to use for vm.args"},
      {sys_config, undefined, "sys_config", string, "Path to a file to use for sys.config"},
      {system_libs, undefined, "system_libs", string, "Path to dir of Erlang system libs"},
      {version, undefined, "version", undefined, "Print relx version"},
diff --git a/src/rlx_cmd_args.erl b/src/rlx_cmd_args.erl
index ac3e718..44fd226 100644
--- a/src/rlx_cmd_args.erl
+++ b/src/rlx_cmd_args.erl
@@ -240,6 +240,9 @@ create(overlay_vars, Opts)->
 create(sys_config, Opts) ->
     SysConfig = proplists:get_value(sys_config, Opts, undefined),
     {sys_config, SysConfig};
+create(vm_args, Opts) ->
+    VmArgs = proplists:get_value(vm_args, Opts, undefined),
+    {vm_args, VmArgs};
 create(system_libs, Opts) ->
     SystemLibs = proplists:get_value(system_libs, Opts, undefined),
     {system_libs, SystemLibs};
diff --git a/src/rlx_config.erl b/src/rlx_config.erl
index dbfe1c6..07ac2c5 100644
--- a/src/rlx_config.erl
+++ b/src/rlx_config.erl
@@ -205,7 +205,12 @@ load_terms({release, {RelName, Vsn}, {erts, ErtsVsn},
             {ok, rlx_state:add_configured_release(State, Release1)}
     end;
 load_terms({vm_args, VmArgs}, {ok, State}) ->
-    {ok, rlx_state:vm_args(State, filename:absname(VmArgs))};
+    case rlx_state:vm_args(State) of
+        undefined ->
+            {ok, rlx_state:vm_args(State, filename:absname(VmArgs))};
+        _ ->
+            {ok, State}
+    end;
 load_terms({sys_config, SysConfig}, {ok, State}) ->
     case rlx_state:sys_config(State) of
         undefined ->