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Break out command line argument parsing to a dedicated routine

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This commit is contained in:
Dave Smith 2010-01-01 06:22:25 -07:00
parent 48c2c169ab
commit 18e1b37e6f
1 changed files with 38 additions and 29 deletions
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67
src/rebar_core.erl
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@ -47,45 +47,20 @@ run(["version"]) ->
{ok, Vsn} = application:get_key(rebar, vsn), {ok, Vsn} = application:get_key(rebar, vsn),
?CONSOLE("Version ~s built ~s\n", [Vsn, ?BUILD_TIME]), ?CONSOLE("Version ~s built ~s\n", [Vsn, ?BUILD_TIME]),
ok; ok;
run(Args) -> run(RawArgs) ->
%% Pre-load the rebar app so that we get default configuration %% Pre-load the rebar app so that we get default configuration
ok = application:load(rebar), ok = application:load(rebar),
%% Parse getopt options %% Parse out command line arguments -- what's left is a list of commands to
OptSpecList = option_spec_list(), %% run
case getopt:parse(OptSpecList, Args) of Commands = parse_args(RawArgs),
{ok, {_Options, []}} ->
%% no command to run specified
getopt:usage(OptSpecList, "rebar");
{ok, {Options, NonOptArgs}} ->
case proplists:get_bool(help, Options) of
true ->
%% display help
getopt:usage(OptSpecList, "rebar");
false ->
%% Set global variables based on getopt options
set_global_flag(Options, verbose),
set_global_flag(Options, force),
%% run rebar with supplied options
run2(NonOptArgs)
end;
{error, {Reason, Data}} ->
?ERROR("Error: ~s ~p~n~n", [Reason, Data]),
getopt:usage(OptSpecList, "rebar")
end.
run2(Args) ->
%% Make sure crypto is running %% Make sure crypto is running
crypto:start(), crypto:start(),
%% Initialize logging system %% Initialize logging system
rebar_log:init(), rebar_log:init(),
%% Filter all the flags (i.e. string of form key=value) from the
%% command line arguments. What's left will be the commands to run.
Commands = filter_flags(Args, []),
%% Convert command strings to atoms %% Convert command strings to atoms
CommandAtoms = [list_to_atom(C) || C <- Commands], CommandAtoms = [list_to_atom(C) || C <- Commands],
@ -97,6 +72,40 @@ run2(Args) ->
%% Internal functions %% 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, []}} ->
%% no command to run specified
getopt:usage(OptSpecList, "rebar"),
halt(1);
{ok, {Options, NonOptArgs}} ->
case proplists:get_bool(help, Options) of
true ->
%% display help
getopt:usage(OptSpecList, "rebar"),
halt(0);
false ->
%% Set global variables based on getopt options
set_global_flag(Options, verbose),
set_global_flag(Options, force),
%% 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, [])
end;
{error, {Reason, Data}} ->
?ERROR("Error: ~s ~p~n~n", [Reason, Data]),
getopt:usage(OptSpecList, "rebar"),
halt(1)
end.
%% %%
%% set global flag based on getopt option boolean value %% set global flag based on getopt option boolean value
%% %%