simple libgit2 tree walker (like tree cli tool)

tree.c

#include <git2.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>

int strocc(char* str, char c) {
  int occ = 0, i = 0;
  while(str[i] != '\0')
    if(str[++i] == c)
      ++occ;

  return occ;
}

int treewalk_cb(const char *dirname, git_tree_entry *entry, void *payload) {
  int* count = (int*) payload;

  char oid_str[8];
  git_oid_tostr(oid_str, 8, git_tree_entry_id(entry));

  char path[128];
  sprintf(path, "%s%s", dirname, git_tree_entry_name(entry));
  path[128] = '\0';

  int intend =  strocc(path, '/');
  if(intend > 0) {
    int i;
    char intend_str[intend*4];
    for(i=0; i < intend*4;++i)
      intend_str[i] = ' '; 
    intend_str[i] = '\0';

    char delimiter[2] = " ";
    if(count[0] < count[1])
      delimiter[0] = '|';

      printf("%s%s└─ %s %s\n", delimiter, intend_str, oid_str, path);
  } else {
    if(++count[0] < count[1])
      printf("├─ %s  %s\n", oid_str, path);
    else
      printf("└─ %s  %s\n", oid_str, path);
  }
}

int main(int argc, char** argv) {
  git_repository* repo;
  git_reference*  head;
  git_tree* tree;
  git_commit* commit;
  git_odb* odb;

  char* path;
  if(argc == 1) {
    printf("Usage: %s path/to/git [commit-sha1]\n", argv[0]);
    exit(-1);
  }

  path = argv[1];

  git_repository_init(&repo, path, false);

  if(argc > 2) {
    git_oid oid;

    printf("Commit %s\n│\n", argv[2]);
    git_oid_fromstr(&oid, argv[2]);
    git_commit_lookup(&commit, repo, &oid);
  } else {
    git_oid* oid;

    char oid_str[40];
    git_oid_tostr(oid_str, 40, oid);
    printf("Commit %s\n│\n", oid_str);

    git_repository_head(&head, repo);
    git_commit_lookup(&commit, repo, git_reference_oid(head));
    git_reference_free(head);
  }

  git_commit_tree(&tree, commit);


  int mode = GIT_TREEWALK_POST;
  int count[] = { 0, git_tree_entrycount(tree)};
  git_tree_walk(tree, &treewalk_cb, mode, (void*) &count);

  git_repository_free(repo);
}