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/*
* runfile - rf
*
* a no-dependancy, minimal
* POSIX C99 Make/justfile
* alternative to run commands.
*
* czjstmax
* <jstmaxlol at
* disroot dot org>
*
* check MAINTAINERS file
*/
#define _POSIX_C_SOURCE 200809L
#define RUNFILE_VER_MAJ 1 /* anything that changes how rfile are written in the slightest */
#define RUNFILE_VER_MIN 1 /* anything that varies the UX of the program (i.e. CLI flags) */
#define RUNFILE_VER_FIX 20 /* optimizations, slight logic tweaks, anything that is not */
/* noticeable by the user but impacts the dev experience enough */
#include <stdio.h> /* to be important */
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdbool.h>
#include <wordexp.h>
#include <sys/wait.h>
void usage();
int main(int argc, char **argv)
{
char *section = NULL;
bool in_section = false;
bool should_run = false;
// check cli arguments
// if (argc < 2) {
// printf("<rf> not enough arguments.\n");
// usage();
// return 1;
// }
if (argc >= 2) {
for (int i = 1; i < argc; i++) {
if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0) {
usage();
return 0;
}
}
}
FILE *f = fopen("rfile", "r");
if (!f) {
fprintf(stderr, "no rfile found.\n");
return 1;
}
wordexp_t p;
char *line = NULL;
size_t len = 0;
while (getline(&line, &len, f) != -1) {
line[strcspn(line, "\n")] = '\0';
char *cmd = line;
while (isspace(*cmd))
cmd++;
if (*cmd == '\0')
continue;
else if (cmd[0] == '#')
continue;
else if (strncmp(cmd, "@:", 2) == 0) {
for (size_t i = 0; i < strlen(cmd); i++)
printf("-");
printf("\n%s\n", cmd);
for (size_t i = 0; i < strlen(cmd); i++)
printf("-");
printf("\n\n");
continue;
}
else if (strcmp(cmd, "}") == 0 || strcmp(line, "}") == 0) {
in_section = false;
free(section);
section = NULL;
continue;
}
char *brace = strchr(cmd, '{');
if (brace) {
*brace = '\0';
size_t l = strlen(cmd);
while (l > 0 && (cmd[l-1] == ' ' || cmd[l-1] == '\t')) {
cmd[l-1] = '\0';
l--;
}
free(section);
section = strdup(cmd);
in_section = true;
continue;
}
should_run = false;
if (argc == 1) {
should_run = !in_section;
}
else {
should_run = in_section &&
section &&
strcmp(argv[1], section) == 0;
}
if (!should_run)
continue;
printf("$ %s\n", cmd);
if (wordexp(cmd, &p, 0) != 0) {
fprintf(stderr, "wordexp failed\n");
continue;
}
pid_t pid = fork();
if (pid == 0) {
execvp(p.we_wordv[0], p.we_wordv);
perror("failed to run command");
fclose(f);
_exit(1);
}
waitpid(pid, NULL, 0);
wordfree(&p);
}
free(line);
fclose(f);
return 0;
}
void usage()
{
printf(
"runfile usage - version %d.%d.%d\n"
"syn: rf [section]\n"
, RUNFILE_VER_MAJ, RUNFILE_VER_MIN, RUNFILE_VER_FIX
);
}
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