Blame src/driver/slbt_amain.c

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/*******************************************************************/
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/*  slibtool: a skinny libtool implementation, written in C        */
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/*  Copyright (C) 2016--2021  SysDeer Technologies, LLC            */
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/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */
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/*******************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <slibtool/slibtool.h>
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#include "slibtool_driver_impl.h"
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#include "slibtool_dprintf_impl.h"
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#ifndef SLBT_DRIVER_FLAGS
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#define SLBT_DRIVER_FLAGS	SLBT_DRIVER_VERBOSITY_ERRORS \
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				| SLBT_DRIVER_VERBOSITY_USAGE
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#endif
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static const char vermsg[] = "%s%s%s (https://git.foss21.org/slibtool): "
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			     "version %s%d.%d.%d%s.\n"
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			     "%s%s%s%s%s\n";
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static const char * const slbt_ver_color[6] = {
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		"\x1b[1m\x1b[35m","\x1b[0m",
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		"\x1b[1m\x1b[32m","\x1b[0m",
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		"\x1b[1m\x1b[34m","\x1b[0m"
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};
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static const char * const slbt_ver_plain[6] = {
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		"","",
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		"","",
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		"",""
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};
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static ssize_t slbt_version(struct slbt_driver_ctx * dctx, int fdout)
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{
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	const struct slbt_source_version * verinfo;
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	const char * const * verclr;
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	bool gitver;
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	verinfo = slbt_source_version();
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	verclr  = isatty(fdout) ? slbt_ver_color : slbt_ver_plain;
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	gitver  = strcmp(verinfo->commit,"unknown");
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	if (dctx->cctx->drvflags & SLBT_DRIVER_ANNOTATE_NEVER)
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		verclr = slbt_ver_plain;
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	return slbt_dprintf(fdout,vermsg,
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			verclr[0],dctx->program,verclr[1],
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			verclr[2],verinfo->major,verinfo->minor,
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			verinfo->revision,verclr[3],
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			gitver ? "[commit reference: " : "",
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			verclr[4],gitver ? verinfo->commit : "",
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			verclr[5],gitver ? "]" : "");
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}
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static void slbt_perform_driver_actions(struct slbt_driver_ctx * dctx)
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{
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	if (dctx->cctx->drvflags & SLBT_DRIVER_CONFIG)
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		slbt_output_config(dctx);
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	if (dctx->cctx->drvflags & SLBT_DRIVER_FEATURES)
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		slbt_output_features(dctx);
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	if (dctx->cctx->mode == SLBT_MODE_COMPILE)
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		slbt_exec_compile(dctx,0);
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	if (dctx->cctx->mode == SLBT_MODE_EXECUTE)
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		slbt_exec_execute(dctx,0);
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	if (dctx->cctx->mode == SLBT_MODE_INSTALL)
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		slbt_exec_install(dctx,0);
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	if (dctx->cctx->mode == SLBT_MODE_LINK)
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		slbt_exec_link(dctx,0);
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	if (dctx->cctx->mode == SLBT_MODE_UNINSTALL)
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		slbt_exec_uninstall(dctx,0);
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	if (dctx->cctx->mode == SLBT_MODE_AR)
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		slbt_exec_ar(dctx,0);
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}
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static int slbt_exit(struct slbt_driver_ctx * dctx, int ret)
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{
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	slbt_output_error_vector(dctx);
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	slbt_free_driver_ctx(dctx);
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	return ret;
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}
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int slbt_main(char ** argv, char ** envp, const struct slbt_fd_ctx * fdctx)
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{
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	int				ret;
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	int				fdout;
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	uint64_t			flags;
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	uint64_t			noclr;
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	struct slbt_driver_ctx *	dctx;
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	char *				program;
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	char *				dash;
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	flags = SLBT_DRIVER_FLAGS;
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	fdout = fdctx ? fdctx->fdout : STDOUT_FILENO;
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	noclr = getenv("NO_COLOR") ? SLBT_DRIVER_ANNOTATE_NEVER : 0;
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	/* program */
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	if ((program = strrchr(argv[0],'/')))
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		program++;
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	else
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		program = argv[0];
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	/* dash */
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	if ((dash = strrchr(program,'-')))
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		dash++;
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	/* flags */
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	if (dash == 0)
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		flags = SLBT_DRIVER_FLAGS;
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	else if (!(strcmp(dash,"shared")))
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		flags = SLBT_DRIVER_FLAGS | SLBT_DRIVER_DISABLE_STATIC;
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	else if (!(strcmp(dash,"static")))
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		flags = SLBT_DRIVER_FLAGS | SLBT_DRIVER_DISABLE_SHARED;
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	/* internal ar mode */
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	else if (!(strcmp(dash,"ar")))
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		flags |= SLBT_DRIVER_MODE_AR;
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	/* debug */
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	if (!(strcmp(program,"dlibtool")))
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		flags |= SLBT_DRIVER_DEBUG;
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	else if (!(strncmp(program,"dlibtool",8)))
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		if ((program[8] == '-') || (program[8] == '.'))
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			flags |= SLBT_DRIVER_DEBUG;
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	/* legabits */
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	if (!(strcmp(program,"clibtool")))
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		flags |= SLBT_DRIVER_LEGABITS;
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	else if (!(strncmp(program,"clibtool",8)))
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		if ((program[8] == '-') || (program[8] == '.'))
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			flags |= SLBT_DRIVER_LEGABITS;
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	/* heuristics */
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	if (!(strcmp(program,"rlibtool")))
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		flags |= SLBT_DRIVER_HEURISTICS;
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	/* heuristics + legabits */
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	if (!(strcmp(program,"rclibtool")))
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		flags |= (SLBT_DRIVER_HEURISTICS
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                          | SLBT_DRIVER_LEGABITS);
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	/* heuristics + debug */
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	if (!(strcmp(program,"rdlibtool")))
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		flags |= (SLBT_DRIVER_HEURISTICS
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                          | SLBT_DRIVER_DEBUG);
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	/* heuristics + debug + legabits */
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	if (!(strcmp(program,"rdclibtool")))
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		flags |= (SLBT_DRIVER_HEURISTICS
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                          | SLBT_DRIVER_DEBUG
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                          | SLBT_DRIVER_LEGABITS);
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	/* driver context */
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	if ((ret = slbt_get_driver_ctx(argv,envp,flags|noclr,fdctx,&dctx)))
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		return (ret == SLBT_USAGE)
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			? !argv || !argv[0] || !argv[1] || !argv[2]
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			: SLBT_ERROR;
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	/* --dumpmachine disables all other actions */
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	if (dctx->cctx->drvflags & SLBT_DRIVER_OUTPUT_MACHINE)
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		return slbt_output_machine(dctx)
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			? SLBT_ERROR : SLBT_OK;
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	/* --version must be the first (and only) action */
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	if (dctx->cctx->drvflags & SLBT_DRIVER_VERSION)
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		if (dctx->cctx->mode != SLBT_MODE_AR)
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			return (slbt_version(dctx,fdout) < 0)
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				? slbt_exit(dctx,SLBT_ERROR)
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				: slbt_exit(dctx,SLBT_OK);
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	/* perform all other actions */
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	slbt_perform_driver_actions(dctx);
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	/* print --version on behalf of a secondary tool as needed */
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	if (dctx->cctx->drvflags & SLBT_DRIVER_VERSION)
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		return (slbt_version(dctx,fdout) < 0)
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			? slbt_exit(dctx,SLBT_ERROR)
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			: slbt_exit(dctx,SLBT_OK);
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	return slbt_exit(dctx,dctx->errv[0] ? SLBT_ERROR : SLBT_OK);
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}