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/* main.c
*
* Copyright 2024 axtlos <axtlos@disroot.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#define _XOPEN_SOURCE 500
#include <extlib.h>
#include "config.h"
struct compile_cmd_t *
find_cmd (char *file_extension, struct compile_cmd_t **ccmds,
size_t ccmds_len)
{
for (int i = 0; i < ccmds_len; i++) {
if (strcmp (ccmds[i]->fileext, file_extension) == 0) {
return ccmds[i];
}
}
return NULL;
}
void
remove_shebang (char **file, char *tmpdir, char *file_extension)
{
char *new_file_path = malloc (strlen (tmpdir) + strlen ("/source.") +
strlen (file_extension) + 1);
sprintf (new_file_path, "%s/source.%s", tmpdir, file_extension);
FILE *new_file = fopen (new_file_path, "w");
FILE *old_file = fopen (*file, "r");
char buffer[1024];
fgets (buffer, 1024, old_file);
fcopy (old_file, new_file);
fclose (new_file);
fclose (old_file);
free (*file);
*file = strdup (new_file_path);
free (new_file_path);
}
int
main (int argc, char *argv[])
{
int errno = 0;
size_t parts_len = 0;
size_t ccmds_len = 0;
struct compile_cmd_t **ccmds = NULL;
struct compile_cmd_t *matching_cmd = NULL;
char *tmpdir = strdup ("/tmp/XXXXXX");;
char *compile_file = NULL;
char *ap = NULL;
char *cmd = NULL;
char *excmd = NULL;
char *fileparts[strlen (argv[argc - 1])];
char *extra_args = NULL;
if (argc < 2) {
fprintf (stderr, "usage: %s <source file>", argv[0]);
errno = 1;
goto EXIT;
}
else if (argc > 2) {
extra_args = join_str(argv, argc-1, ' ');
}
compile_file = strdup (argv[argc - 1]);
ccmds_len = get_commands (&ccmds);
tmpdir = mkdtemp (tmpdir);
if (!tmpdir) {
errno = 1;
goto EXIT;
}
for (int i = 0; (ap = strsep (&argv[argc - 1], ".")); i++) {
fileparts[i] = ap;
parts_len += 1;
}
if (parts_len == 0) {
fprintf (stderr, "error: no file extension found\n");
errno = 1;
goto EXIT;
}
matching_cmd = find_cmd (fileparts[parts_len - 1], ccmds, ccmds_len);
if (!matching_cmd) {
fprintf (stderr, "error: no complier for file extension '%s' found\n",
fileparts[parts_len - 1]);
errno = 1;
goto EXIT;
}
FILE *source = fopen (compile_file, "r");
char is_shebang[3];
fread (&is_shebang, 1, 2, source);
fclose (source);
if (strcmp (is_shebang, "#!") == 0)
remove_shebang (&compile_file, tmpdir, fileparts[parts_len - 1]);
cmd = malloc (strlen (matching_cmd->cmd) +
strlen (matching_cmd->args) +
strlen (compile_file) +
strlen (extra_args == NULL ? "" : extra_args + strlen (argv[0]) + 1) +
strlen (" -o ") +
strlen (tmpdir) + strlen ("/exec") + 1);
if (!cmd) {
errno = 1;
goto EXIT;
}
excmd = malloc (strlen (tmpdir) + strlen ("/exec") + 1);
if (!excmd) {
errno = 1;
goto EXIT;
}
sprintf (cmd, "%s %s %s %s -o %s/exec", matching_cmd->cmd,
matching_cmd->args, extra_args == NULL ? "" : extra_args + strlen (argv[0]) + 1, compile_file, tmpdir);
if ((errno = system (cmd), errno != 0)) {
fprintf (stderr, "error: compiler failed with code %d\n", errno);
goto EXIT;
}
sprintf (excmd, "%s/exec", tmpdir);
if ((errno = system (excmd), errno != 0)) {
fprintf (stderr, "error: binary failed with code %d\n", errno);
goto EXIT;
}
if ((errno = rrmdir (tmpdir)), errno != 0)
fprintf (stderr, "error: failed to remove temporary directory %s\n",
tmpdir);
EXIT:
for (int i = 0; i < ccmds_len; i++)
compile_cmd_free (ccmds[i]);
free (excmd);
free (ccmds);
free (tmpdir);
free (cmd);
free (compile_file);
free (extra_args);
exit (errno % 255);
}
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