add main

main.c

+#include <dirent.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+typedef struct {
+  char **items;
+  size_t size;
+  size_t capacity;
+} da_str_t;
+
+#define da_append(da, item)                                                    \
+  do {                                                                         \
+    if ((da)->size >= (da)->capacity) {                                        \
+      if ((da)->capacity == 0) {                                               \
+        (da)->capacity = 256;                                                  \
+      }                                                                        \
+      (da)->items =                                                            \
+          realloc((da)->items, (da)->capacity * sizeof(*(da)->items));         \
+    }                                                                          \
+    (da)->items[(da)->size++] = item;                                          \
+  } while (0)
+
+#define da_foreach(Type, it, da)                                               \
+  for (Type *it = (da)->items; it < (da)->items + (da)->size; ++it)
+
+#ifdef DEBUG
+#define log_infoln(fmt, ...) printf("INFO: " fmt "\n", ##__VA_ARGS__)
+#else // DEBUG
+#define log_infoln(fmt, ...) ((void)0)
+#endif // DEBUG
+
+da_str_t ls(const char *path) {
+  DIR *dp = opendir(path);
+  if (dp == NULL) {
+    if (errno == ENOTDIR) {
+      return (da_str_t){0};
+    }
+    perror("opendir");
+    exit(EXIT_FAILURE);
+  }
+
+  da_str_t files = {0};
+  struct dirent *entry;
+  while ((entry = readdir(dp))) {
+    if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0) {
+      continue;
+    }
+    da_append(&files, entry->d_name);
+  }
+
+  closedir(dp);
+
+  return files;
+}
+
+char *concat(const char *s1, const char *s2) {
+  char *result = malloc(strlen(s1) + strlen(s2) + 1);
+  strcpy(result, s1);
+  strcat(result, s2);
+  return result;
+}
+
+da_str_t find_git(const char *path) {
+  log_infoln("current: %s", path);
+
+  da_str_t next = ls(path);
+  if (next.size == 0) {
+    log_infoln("\tfile or empty directory");
+    return (da_str_t){0};
+  }
+
+  bool is_repo = false;
+  da_foreach(char *, f, &next) {
+    log_infoln("\t\tnext: %s", *f);
+    if (strcmp(*f, ".git") == 0) {
+      is_repo = true;
+    }
+  }
+
+  da_str_t repos = {0};
+
+  if (is_repo) {
+    log_infoln("\trepo");
+    da_append(&repos, (char *)path);
+    return repos;
+  }
+
+  log_infoln("\tNOT a repo");
+
+  da_foreach(char *, f, &next) {
+    char *g = malloc(sizeof(f) + 1);
+    strcpy(g, *f);
+    da_str_t res = find_git(concat(concat(path, "/"), g));
+    da_foreach(char *, r, &res) { da_append(&repos, *r); }
+  }
+
+  return repos;
+}
+
+int main(int argc, char *argv[]) {
+  // da_str_t files = ls((argc > 1) ? argv[1] : ".");
+  // da_foreach(char *, f, &files) { printf("%s\n", *f); }
+  // printf("    %zu\n", files.size);
+
+  da_str_t repos = find_git((argc > 1) ? argv[1] : ".");
+
+  printf("repos found:\n");
+  da_foreach(char *, r, &repos) { printf("\t%s\n", *r); }
+  printf("    %zu\n", repos.size);
+
+  return EXIT_SUCCESS;
+}