/*******************************************************************/

/*  slibtool: a skinny libtool implementation, written in C        */

/*  Copyright (C) 2016--2018  Z. Gilboa                            */

/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */

/*******************************************************************/

#include <string.h>

#include <stdbool.h>

#include <fcntl.h>

#include <errno.h>

#include <sys/stat.h>

#include <slibtool/slibtool.h>

#include "slibtool_spawn_impl.h"

#include "slibtool_mkdir_impl.h"

#include "slibtool_errinfo_impl.h"

#include "slibtool_metafile_impl.h"

static int slbt_exec_compile_remove_file(

	const struct slbt_driver_ctx *	dctx,

	struct slbt_exec_ctx *		ectx,

	const char *			target)

{

	(void)ectx;

	/* remove target (if any) */

	if (!(unlink(target)) || (errno == ENOENT))

		return 0;

	return SLBT_SYSTEM_ERROR(dctx);

}

int  slbt_exec_compile(

	const struct slbt_driver_ctx *	dctx,

	struct slbt_exec_ctx *		ectx)

{

	int				ret;

	char *				fpic;

	struct slbt_exec_ctx *		actx = 0;

	const struct slbt_common_ctx *	cctx = dctx->cctx;

	/* dry run */

	if (cctx->drvflags & SLBT_DRIVER_DRY_RUN)

		return 0;

	/* context */

	if (ectx)

		slbt_reset_placeholders(ectx);

	else if ((ret = slbt_get_exec_ctx(dctx,&ectx)))

		return ret;

	else

		actx = ectx;

	/* remove old .lo wrapper */

	if (slbt_exec_compile_remove_file(dctx,ectx,ectx->ltobjname))

		return SLBT_NESTED_ERROR(dctx);

	/* .libs directory */

	if (cctx->drvflags & SLBT_DRIVER_SHARED)

		if (slbt_mkdir(dctx,ectx->ldirname)) {

			slbt_free_exec_ctx(actx);

			return SLBT_SYSTEM_ERROR(dctx);

		}

	/* compile mode */

	ectx->program = ectx->compiler;

	ectx->argv    = ectx->cargv;

	/* -fpic */

	fpic = *ectx->fpic;

	if ((cctx->tag == SLBT_TAG_CC) || (cctx->tag == SLBT_TAG_CXX))

		if (cctx->settings.picswitch)

			fpic = cctx->settings.picswitch;

	/* shared library object */

	if (cctx->drvflags & SLBT_DRIVER_SHARED) {

		if (!(cctx->drvflags & SLBT_DRIVER_ANTI_PIC)) {

			*ectx->dpic = "-DPIC";

			*ectx->fpic = fpic;

		}

		*ectx->lout[0] = "-o";

		*ectx->lout[1] = ectx->lobjname;

		if (!(cctx->drvflags & SLBT_DRIVER_SILENT)) {

			if (slbt_output_compile(dctx,ectx)) {

				slbt_free_exec_ctx(actx);

				return SLBT_NESTED_ERROR(dctx);

			}

		}

		if (((ret = slbt_spawn(ectx,true)) < 0) || ectx->exitcode) {

			slbt_free_exec_ctx(actx);

			return SLBT_SYSTEM_ERROR(dctx);

		}

	}

	/* static archive object */

	if (cctx->drvflags & SLBT_DRIVER_STATIC) {

		slbt_reset_placeholders(ectx);

		if (cctx->drvflags & SLBT_DRIVER_PRO_PIC) {

			*ectx->dpic = "-DPIC";

			*ectx->fpic = fpic;

		}

		*ectx->lout[0] = "-o";

		*ectx->lout[1] = ectx->aobjname;

		if (!(cctx->drvflags & SLBT_DRIVER_SILENT)) {

			if (slbt_output_compile(dctx,ectx)) {

				slbt_free_exec_ctx(actx);

				return SLBT_NESTED_ERROR(dctx);

			}

		}

		if (((ret = slbt_spawn(ectx,true)) < 0) || ectx->exitcode) {

			slbt_free_exec_ctx(actx);

			return SLBT_SYSTEM_ERROR(dctx);

		}

	}

	ret = slbt_create_object_wrapper(dctx,ectx);

	slbt_free_exec_ctx(actx);

	return ret ? SLBT_NESTED_ERROR(dctx) : 0;

}