repository.c

#include "mvcs.h"

/* Create directory recursively */
int create_directory(const char *path) {
    char tmp[MAX_PATH_LEN];
    char *p = NULL;
    size_t len;

    snprintf(tmp, sizeof(tmp), "%s", path);
    len = strlen(tmp);
    if (tmp[len - 1] == '/') {
        tmp[len - 1] = 0;
    }

    for (p = tmp + 1; *p; p++) {
        if (*p == '/') {
            *p = 0;
            mkdir(tmp, 0755);
            *p = '/';
        }
    }
    mkdir(tmp, 0755);
    return 0;
}

/* Check if file exists */
int file_exists(const char *path) {
    return access(path, F_OK) == 0;
}

/* Check if path is a directory */
int is_directory(const char *path) {
    struct stat st;
    if (stat(path, &st) != 0) {
        return 0;
    }
    return S_ISDIR(st.st_mode);
}

/* Initialize repository */
int mvcs_init(void) {
    if (file_exists(MVCS_DIR)) {
        fprintf(stderr, "Repository already exists\n");
        return -1;
    }

    /* Create directory structure */
    create_directory(MVCS_DIR);
    create_directory(OBJECTS_DIR);
    create_directory(REFS_DIR);
    create_directory(REFS_HEADS_DIR);

    /* Create HEAD file pointing to master */
    FILE *f = fopen(HEAD_FILE, "w");
    if (!f) {
        perror("Failed to create HEAD");
        return -1;
    }
    fprintf(f, "ref: refs/heads/master\n");
    fclose(f);

    /* Create empty index */
    f = fopen(INDEX_FILE, "w");
    if (f) fclose(f);

    printf("Initialized empty MVCS repository in %s/\n", MVCS_DIR);
    return 0;
}

/* Check if current directory is a repository */
int mvcs_is_repo(void) {
    return file_exists(MVCS_DIR) && is_directory(MVCS_DIR);
}