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/**
* \file host.c
* \brief Main executable API.
* \author Copyright (c) 2002-2008 Jason Perkins and the Premake project
*/
#include <assert.h>
#include <stdlib.h>
#include "premake.h"
#include "host/host.h"
#include "script/script.h"
#include "actions/actions.h"
#include "base/cstr.h"
#include "base/env.h"
#include "base/error.h"
#include "base/file.h"
DEFINE_CLASS(Host)
{
Script script;
const char** args;
};
/**
* Create a new Premake host object.
* \returns A new session object, or NULL if the scripting engine fails to start.
*/
Host host_create()
{
Host host;
Script script = script_create();
if (script == NULL)
{
return NULL;
}
host = ALLOC_CLASS(Host);
host->script = script;
host->args = NULL;
return host;
}
/**
* Destroy a Premake host object and release the associated memory.
*/
void host_destroy(Host host)
{
assert(host);
script_destroy(host->script);
free(host);
}
/**
* Initial processing and validation of the command line arguments.
* \returns OKAY on success.
*/
int host_parse_argv(Host host)
{
script_set_action(host->script, host->args[0]);
env_set_action(host->args[0]);
return OKAY;
}
/**
* Display the results of the application run.
* Any errors returned during the run will be written to stderr; otherwise, a
* success message is written to stdout.
*/
int host_report_results()
{
const char* error = error_get();
if (error)
{
stream_writeline(Console, "Error: %s", error);
}
return OKAY;
}
/**
* Run the action specified by the user on the command line.
* \returns OKAY on success.
*/
int host_run_action(Host host)
{
Session sess;
const char* action;
int i, z = OKAY;
assert(host);
/* there must be a project file defined or I can go no further */
if (!file_exists(DEFAULT_SCRIPT_NAME))
{
error_set("script file '%s' not found", DEFAULT_SCRIPT_NAME);
return !OKAY;
}
/* unload the defined objects from the script */
sess = script_unload(host->script);
if (sess == NULL)
{
return !OKAY;
}
/* find the action in the master list and execute the associated callback */
action = host->args[0];
for (i = 0; Actions[i].name != NULL; ++i)
{
if (cstr_eq(Actions[i].name, action))
{
z = Actions[i].callback(sess);
session_destroy(sess);
return z;
}
}
/* an invalid action was specified */
error_set("invalid action '%s'", action);
return !OKAY;
}
/**
* Find and execute the project script file.
* \returns OKAY on success.
*/
int host_run_script(Host host)
{
assert(host);
/* run the default file for now. If the script file doesn't exist let execution
* continue so I can display help, etc. */
if (file_exists(DEFAULT_SCRIPT_NAME))
{
script_run_file(host->script, DEFAULT_SCRIPT_NAME);
return (error_get() == NULL) ? OKAY : !OKAY;
}
else
{
return OKAY;
}
}
/**
* Remember the list of command-line parameters for subsequent calls
* to the other host functions later in the processing steps.
*/
void host_set_argv(Host host, const char** argv)
{
/* skip over the progam name in argv[0] and just store the arguments */
host->args = &argv[1];
}
/**
* Display help and version messages as appropriate. If any messages are
* shown, execution of the main step loop will be stopped and the application
* will exit (this seems to be the standard behavior of POSIX apps when
* help is requested).
* \returns OKAY is no help information was required, !OKAY to stop the loop.
*/
int host_show_help(Host host)
{
/* while (arg is option) { */
/* if (/version) ... */
/* if (/help) ... */
/* if no action was specified give the user a clue */
if (host->args[0] == NULL)
{
stream_writeline(Console, HOST_SHORT_HELP);
return !OKAY;
}
return OKAY;
}
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