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/*
* Copyright (c) 2026, Chloe M., et al.
* Provided under the BSD-3 clause.
*/
#include <sys/wait.h>
#include <dirent.h>
#include <stdint.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdbool.h>
#include <strings.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include "bop/common.h"
#include "bop/build.h"
/*
* Build parameters
*
* @cflags: List of CFLAGS
*
* TODO: Use this instead of BOP_DEFAULT_CFLAGS and similar
*/
struct build_params {
char **cflags;
};
/*
* Obtain the file extension of a file
*
* @filename: Filename to obtain extension of
*/
static const char *
get_extension(const char *filename)
{
const char *p;
bool have_dot = false;
if (filename == NULL) {
return NULL;
}
p = filename;
while (*p != '\0') {
if (*p == '.') {
have_dot = true;
} else if (have_dot) {
--p;
return p;
}
++p;
}
return NULL;
}
/*
* Truncate a file extension
*
* @filename: Filename to truncate file extension from
*
* XXX: Returns memory allocated with strdup(), remember to free!
*/
static char *
trunc_extension(const char *filename)
{
char *p, *p1;
if ((p = strdup(filename)) == NULL) {
return NULL;
}
p1 = p;
while (*p1 != '\0') {
if (*p1 == '.') {
*p1 = '\0';
return p;
}
++p1;
}
free(p);
return NULL;
}
static int
invoke_cc(const char *cfile_path, struct build_params *params)
{
pid_t child;
int status;
char *trunc_ext;
char outpath[256];
if (cfile_path == NULL || params == NULL) {
return -1;
}
trunc_ext = trunc_extension(cfile_path);
if (trunc_ext == NULL) {
return -1;
}
snprintf(outpath, sizeof(outpath), "%s.o", trunc_ext);
child = fork();
if (child == 0) {
printf("[CC]\t\t%s\n", cfile_path);
execl(BOP_CC, BOP_CC, "-c", cfile_path, "-o", outpath, BOP_DEFAULT_CFLAGS, NULL);
} else {
waitpid(child, &status, 0);
free(trunc_ext);
return status;
}
return -1;
}
static int
compile(const char *dirpath, struct dirent *dirent, struct build_params *params)
{
const char *filename, *ext;
char pathbuf[256];
int error;
if (dirpath == NULL || dirent == NULL) {
return -1;
}
/* Ignore non regulars */
if (dirent->d_type != DT_REG) {
return 0;
}
filename = dirent->d_name;
ext = get_extension(filename);
/* Ignore files with no extensions */
if (ext == NULL) {
return 0;
}
snprintf(pathbuf, sizeof(pathbuf), "%s/%s", dirpath, filename);
/* Build all CFILES */
if (strcmp(ext, ".c") == 0) {
error = invoke_cc(pathbuf, params);
if (error < 0)
printf("fatal: cc invocation failure\n");
return error;
}
return 0;
}
static void
clean_object(const char *dirpath, struct dirent *dirent)
{
char pathbuf[256];
const char *filename, *ext;
if (dirpath == NULL || dirent == NULL) {
return;
}
/* Ignore non regulars */
if (dirent->d_type != DT_REG) {
return;
}
/* Ignore files without an extension */
filename = dirent->d_name;
ext = get_extension(filename);
if (ext == NULL) {
return;
}
/* Ignore non object files */
if (strcmp(ext, ".o") != 0) {
return;
}
snprintf(pathbuf, sizeof(pathbuf), "%s/%s", dirpath, dirent->d_name);
printf("clean %s\n", pathbuf);
remove(pathbuf);
}
int
bop_build_dir(const char *dirpath, build_op_t bop)
{
struct build_params params;
struct dirent *dirent;
DIR *dir;
int error;
dir = opendir(dirpath);
if (dir == NULL) {
perror("opendir");
return -1;
}
bzero(¶ms, sizeof(params));
while ((dirent = readdir(dir)) != NULL) {
if (dirent->d_name[0] == '.') {
continue;
}
switch (bop) {
case BUILD_OP_BUILD:
error = compile(dirpath, dirent, ¶ms);
if (error < 0) {
printf("fatal: failed to build '%s'\n", dirent->d_name);
return error;
}
break;
case BUILD_OP_CLEAN:
clean_object(dirpath, dirent);
break;
}
}
return 0;
}
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