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// file : bdep/help.cxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#include <bdep/help.hxx>
#include <libbutl/pager.hxx>
#include <bdep/diagnostics.hxx>
#include <bdep/bdep-options.hxx>
// Help topics.
//
#include <bdep/projects-configs.hxx>
#include <bdep/argument-grouping.hxx>
#include <bdep/default-options-files.hxx>
using namespace std;
using namespace butl;
namespace bdep
{
int
help (const help_options& o, const string& t, usage_function* usage)
{
if (usage == nullptr) // Not a command.
{
if (t.empty ()) // General help.
usage = &print_bdep_usage;
//
// Help topics.
//
else if (t == "common-options")
usage = &print_bdep_common_options_long_usage;
else if (t == "projects-configs")
usage = &print_bdep_projects_configs_usage;
else if (t == "argument-grouping")
usage = &print_bdep_argument_grouping_usage;
else if (t == "default-options-files")
usage = &print_bdep_default_options_files_usage;
else
fail << "unknown bdep command/help topic '" << t << "'" <<
info << "run 'bdep help' for more information";
}
try
{
pager p ("bdep " + (t.empty () ? "help" : t),
verb >= 2,
o.pager_specified () ? &o.pager () : nullptr,
&o.pager_option ());
usage (p.stream (), cli::usage_para::none);
// If the pager failed, assume it has issued some diagnostics.
//
return p.wait () ? 0 : 1;
}
// Catch io_error as std::system_error together with the pager-specific
// exceptions.
//
catch (const system_error& e)
{
error << "pager failed: " << e;
// Fall through.
}
throw failed ();
}
default_options_files
options_files (const char*, const help_options&, const strings&)
{
// bdep.options
// bdep-help.options
return default_options_files {
{path ("bdep.options"), path ("bdep-help.options")},
nullopt /* start */};
}
help_options
merge_options (const default_options<help_options>& defs,
const help_options& cmd)
{
return merge_default_options (defs, cmd);
}
}
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