Move command line handling funs into rebar.erl

2 files changed, 187 insertions, 173 deletions

diff --git a/src/rebar.erl b/src/rebar.erl
index 74812f5..673a4c1 100644
--- a/src/rebar.erl
+++ b/src/rebar.erl
@@ -26,7 +26,16 @@
 %% -------------------------------------------------------------------
 -module(rebar).
 
--export([main/1]).
+-export([main/1,
+         help/0,
+         parse_args/1,
+         version/0]).
+
+-include("rebar.hrl").
+
+%% ====================================================================
+%% Public API
+%% ====================================================================
 
 main(Args) ->
     case catch(rebar_core:run(Args)) of
@@ -39,3 +48,177 @@ main(Args) ->
             io:format("Uncaught error in rebar_core: ~p\n", [Error]),
             halt(1)
     end.
+
+%%
+%% print help/usage string
+%%
+help() ->
+    OptSpecList = option_spec_list(),
+    getopt:usage(OptSpecList, "rebar",
+                 "[var=value,...] <command,...>",
+                 [{"var=value", "rebar global variables (e.g. force=1)"},
+                  {"command", "Command to run (e.g. compile)"}]).
+
+%%
+%% Parse command line arguments using getopt and also filtering out any
+%% key=value pairs. What's left is the list of commands to run
+%%
+parse_args(Args) ->
+    %% Parse getopt options
+    OptSpecList = option_spec_list(),
+    case getopt:parse(OptSpecList, Args) of
+        {ok, {Options, NonOptArgs}} ->
+            %% Check options and maybe halt execution
+            ok = show_info_maybe_halt(Options, NonOptArgs),
+
+            %% Set global variables based on getopt options
+            set_global_flag(Options, verbose),
+            set_global_flag(Options, force),
+            DefJobs = rebar_config:get_jobs(),
+            case proplists:get_value(jobs, Options, DefJobs) of
+                DefJobs ->
+                    ok;
+                Jobs ->
+                    rebar_config:set_global(jobs, Jobs)
+            end,
+
+            %% Set the rebar config to use
+            case proplists:get_value(config, Options) of
+                undefined -> ok;
+                Conf -> rebar_config:set_global(config, Conf)
+            end,
+
+            %% Filter all the flags (i.e. strings of form key=value) from the
+            %% command line arguments. What's left will be the commands to run.
+            filter_flags(NonOptArgs, []);
+
+        {error, {Reason, Data}} ->
+            ?ERROR("Error: ~s ~p~n~n", [Reason, Data]),
+            rebar:help(),
+            halt(1)
+    end.
+
+%%
+%% show version information and halt
+%%
+version() ->
+    {ok, Vsn} = application:get_key(rebar, vsn),
+    ?CONSOLE("rebar version: ~s date: ~s vcs: ~s\n", [Vsn, ?BUILD_TIME, ?VCS_INFO]).
+
+
+%% ====================================================================
+%% Internal functions
+%% ====================================================================
+
+%%
+%% set global flag based on getopt option boolean value
+%%
+set_global_flag(Options, Flag) ->
+    Value = case proplists:get_bool(Flag, Options) of
+                true ->
+                    "1";
+                false ->
+                    "0"
+            end,
+    rebar_config:set_global(Flag, Value).
+
+%%
+%% show info and maybe halt execution
+%%
+show_info_maybe_halt(Opts, NonOptArgs) ->
+    false = show_info_maybe_halt(help, Opts, fun help/0),
+    false = show_info_maybe_halt(commands, Opts, fun commands/0),
+    false = show_info_maybe_halt(version, Opts, fun version/0),
+    case NonOptArgs of
+        [] ->
+            ?CONSOLE("No command to run specified!~n",[]),
+            help(),
+            halt(1);
+        _ ->
+            ok
+    end.
+
+show_info_maybe_halt(O, Opts, F) ->
+    case proplists:get_bool(O, Opts) of
+        true ->
+            F(),
+            halt(0);
+        false ->
+            false
+    end.
+
+%%
+%% print known commands
+%%
+commands() ->
+    S = <<"
+dialyze                              Analyze with Dialyzer
+build-plt                            Build Dialyzer PLT
+check-plt                            Check Dialyzer PLT
+
+clean                                Clean
+compile                              Compile sources
+
+create      template= [var=foo,...]  Create skel based on template and vars
+create-app  [appid=myapp]            Create simple app skel
+create-node [nodeid=mynode]          Create simple node skel
+list-templates                       List available templates
+
+doc                                  Generate Erlang program documentation
+
+check-deps                           Display to be fetched dependencies
+get-deps                             Fetch dependencies
+update-deps                          Update fetched dependencies
+delete-deps                          Delete fetched dependencies
+
+generate    [dump_spec=0/1]          Build release with reltool
+
+eunit       [suite=foo]              Run eunit [test/foo_tests.erl] tests
+ct          [suite=] [case=]         Run common_test suites in ./test
+
+xref                                 Run cross reference analysis
+
+help                                 Show the program options
+version                              Show version information
+">>,
+    io:put_chars(S),
+    %% workaround to delay exit until all output is written
+    timer:sleep(300).
+
+%%
+%% options accepted via getopt
+%%
+option_spec_list() ->
+    Jobs = rebar_config:get_jobs(),
+    JobsHelp = io_lib:format(
+        "Number of concurrent workers a command may use. Default: ~B",
+        [Jobs]),
+    [
+     %% {Name, ShortOpt, LongOpt, ArgSpec, HelpMsg}
+     {help,     $h, "help",       undefined, "Show the program options"},
+     {commands, $c, "commands",   undefined, "Show available commands"},
+     {verbose,  $v, "verbose",    undefined, "Be verbose about what gets done"},
+     {version,  $V, "version",    undefined, "Show version information"},
+     {force,    $f, "force",      undefined, "Force"},
+     {jobs,     $j, "jobs",       integer,   JobsHelp},
+     {config,   $C, "config",     string,    "Rebar config file to use"}
+    ].
+
+%%
+%% Seperate all commands (single-words) from flags (key=value) and store
+%% values into the rebar_config global storage.
+%%
+filter_flags([], Commands) ->
+    lists:reverse(Commands);
+filter_flags([Item | Rest], Commands) ->
+    case string:tokens(Item, "=") of
+        [Command] ->
+            filter_flags(Rest, [Command | Commands]);
+        [KeyStr, Value] ->
+            Key = list_to_atom(KeyStr),
+            rebar_config:set_global(Key, Value),
+            filter_flags(Rest, Commands);
+        Other ->
+            ?CONSOLE("Ignoring command line argument: ~p\n", [Other]),
+            filter_flags(Rest, Commands)
+    end.
diff --git a/src/rebar_core.erl b/src/rebar_core.erl
index edf220f..86607e2 100644
--- a/src/rebar_core.erl
+++ b/src/rebar_core.erl
@@ -47,12 +47,12 @@
 %% ===================================================================
 
 run(["help"]) ->
-    help(),
+    rebar:help(),
     ok;
 run(["version"]) ->
     %% Load application spec and display vsn and build time info
     ok = application:load(rebar),
-    version(),
+    rebar:version(),
     ok;
 run(RawArgs) ->
     %% Pre-load the rebar app so that we get default configuration
@@ -60,7 +60,7 @@ run(RawArgs) ->
 
     %% Parse out command line arguments -- what's left is a list of commands to
     %% run
-    Commands = parse_args(RawArgs),
+    Commands = rebar:parse_args(RawArgs),
 
     %% Make sure crypto is running
     ok = crypto:start(),
@@ -110,175 +110,6 @@ skip_dirs() ->
 %% Internal functions
 %% ===================================================================
 
-%%
-%% Parse command line arguments using getopt and also filtering out any
-%% key=value pairs. What's left is the list of commands to run
-%%
-parse_args(Args) ->
-    %% Parse getopt options
-    OptSpecList = option_spec_list(),
-    case getopt:parse(OptSpecList, Args) of
-        {ok, {Options, NonOptArgs}} ->
-            %% Check options and maybe halt execution
-            ok = show_info_maybe_halt(Options, NonOptArgs),
-
-            %% Set global variables based on getopt options
-            set_global_flag(Options, verbose),
-            set_global_flag(Options, force),
-            DefJobs = rebar_config:get_jobs(),
-            case proplists:get_value(jobs, Options, DefJobs) of
-                DefJobs ->
-                    ok;
-                Jobs ->
-                    rebar_config:set_global(jobs, Jobs)
-            end,
-
-            %% Set the rebar config to use
-            case proplists:get_value(config, Options) of
-                undefined -> ok;
-                Conf -> rebar_config:set_global(config, Conf)
-            end,
-
-            %% Filter all the flags (i.e. strings of form key=value) from the
-            %% command line arguments. What's left will be the commands to run.
-            filter_flags(NonOptArgs, []);
-
-        {error, {Reason, Data}} ->
-            ?ERROR("Error: ~s ~p~n~n", [Reason, Data]),
-            help(),
-            halt(1)
-    end.
-
-%%
-%% set global flag based on getopt option boolean value
-%%
-set_global_flag(Options, Flag) ->
-    Value = case proplists:get_bool(Flag, Options) of
-                true ->
-                    "1";
-                false ->
-                    "0"
-            end,
-    rebar_config:set_global(Flag, Value).
-
-%%
-%% show info and maybe halt execution
-%%
-show_info_maybe_halt(Opts, NonOptArgs) ->
-    false = show_info_maybe_halt(help, Opts, fun help/0),
-    false = show_info_maybe_halt(commands, Opts, fun commands/0),
-    false = show_info_maybe_halt(version, Opts, fun version/0),
-    case NonOptArgs of
-        [] ->
-            ?CONSOLE("No command to run specified!~n",[]),
-            help(),
-            halt(1);
-        _ ->
-            ok
-    end.
-
-show_info_maybe_halt(O, Opts, F) ->
-    case proplists:get_bool(O, Opts) of
-        true ->
-            F(),
-            halt(0);
-        false ->
-            false
-    end.
-
-%%
-%% print help/usage string
-%%
-help() ->
-    OptSpecList = option_spec_list(),
-    getopt:usage(OptSpecList, "rebar",
-                 "[var=value,...] <command,...>",
-                 [{"var=value", "rebar global variables (e.g. force=1)"},
-                  {"command", "Command to run (e.g. compile)"}]).
-
-%%
-%% print known commands
-%%
-commands() ->
-    S = <<"
-dialyze                              Analyze with Dialyzer
-build-plt                            Build Dialyzer PLT
-check-plt                            Check Dialyzer PLT
-
-clean                                Clean
-compile                              Compile sources
-
-create      template= [var=foo,...]  Create skel based on template and vars
-create-app  [appid=myapp]            Create simple app skel
-create-node [nodeid=mynode]          Create simple node skel
-list-templates                       List available templates
-
-doc                                  Generate Erlang program documentation
-
-check-deps                           Display to be fetched dependencies
-get-deps                             Fetch dependencies
-update-deps                          Update fetched dependencies
-delete-deps                          Delete fetched dependencies
-
-generate    [dump_spec=0/1]          Build release with reltool
-
-eunit       [suite=foo]              Run eunit [test/foo_tests.erl] tests
-ct          [suite=] [case=]         Run common_test suites in ./test
-
-xref                                 Run cross reference analysis
-
-help                                 Show the program options
-version                              Show version information
-">>,
-    io:put_chars(S),
-    %% workaround to delay exit until all output is written
-    timer:sleep(300).
-
-%%
-%% show version information and halt
-%%
-version() ->
-    {ok, Vsn} = application:get_key(rebar, vsn),
-    ?CONSOLE("rebar version: ~s date: ~s vcs: ~s\n", [Vsn, ?BUILD_TIME, ?VCS_INFO]).
-
-%%
-%% options accepted via getopt
-%%
-option_spec_list() ->
-    Jobs = rebar_config:get_jobs(),
-    JobsHelp = io_lib:format(
-        "Number of concurrent workers a command may use. Default: ~B",
-        [Jobs]),
-    [
-     %% {Name, ShortOpt, LongOpt, ArgSpec, HelpMsg}
-     {help,     $h, "help",       undefined, "Show the program options"},
-     {commands, $c, "commands",   undefined, "Show available commands"},
-     {verbose,  $v, "verbose",    undefined, "Be verbose about what gets done"},
-     {version,  $V, "version",    undefined, "Show version information"},
-     {force,    $f, "force",      undefined, "Force"},
-     {jobs,     $j, "jobs",       integer,   JobsHelp},
-     {config,   $C, "config",     string,    "Rebar config file to use"}
-    ].
-
-%%
-%% Seperate all commands (single-words) from flags (key=value) and store
-%% values into the rebar_config global storage.
-%%
-filter_flags([], Commands) ->
-    lists:reverse(Commands);
-filter_flags([Item | Rest], Commands) ->
-    case string:tokens(Item, "=") of
-        [Command] ->
-            filter_flags(Rest, [Command | Commands]);
-        [KeyStr, Value] ->
-            Key = list_to_atom(KeyStr),
-            rebar_config:set_global(Key, Value),
-            filter_flags(Rest, Commands);
-        Other ->
-            ?CONSOLE("Ignoring command line argument: ~p\n", [Other]),
-            filter_flags(Rest, Commands)
-    end.
-
 process_commands([]) ->
     case erlang:get(operations) of
         0 ->