diff options
Diffstat (limited to 'contrib/convert-objects/convert-objects.c')
-rw-r--r-- | contrib/convert-objects/convert-objects.c | 329 |
1 files changed, 0 insertions, 329 deletions
diff --git a/contrib/convert-objects/convert-objects.c b/contrib/convert-objects/convert-objects.c deleted file mode 100644 index f3b57bf1d2..0000000000 --- a/contrib/convert-objects/convert-objects.c +++ /dev/null @@ -1,329 +0,0 @@ -#include "cache.h" -#include "blob.h" -#include "commit.h" -#include "tree.h" - -struct entry { - unsigned char old_sha1[20]; - unsigned char new_sha1[20]; - int converted; -}; - -#define MAXOBJECTS (1000000) - -static struct entry *convert[MAXOBJECTS]; -static int nr_convert; - -static struct entry * convert_entry(unsigned char *sha1); - -static struct entry *insert_new(unsigned char *sha1, int pos) -{ - struct entry *new = xcalloc(1, sizeof(struct entry)); - hashcpy(new->old_sha1, sha1); - memmove(convert + pos + 1, convert + pos, (nr_convert - pos) * sizeof(struct entry *)); - convert[pos] = new; - nr_convert++; - if (nr_convert == MAXOBJECTS) - die("you're kidding me - hit maximum object limit"); - return new; -} - -static struct entry *lookup_entry(unsigned char *sha1) -{ - int low = 0, high = nr_convert; - - while (low < high) { - int next = (low + high) / 2; - struct entry *n = convert[next]; - int cmp = hashcmp(sha1, n->old_sha1); - if (!cmp) - return n; - if (cmp < 0) { - high = next; - continue; - } - low = next+1; - } - return insert_new(sha1, low); -} - -static void convert_binary_sha1(void *buffer) -{ - struct entry *entry = convert_entry(buffer); - hashcpy(buffer, entry->new_sha1); -} - -static void convert_ascii_sha1(void *buffer) -{ - unsigned char sha1[20]; - struct entry *entry; - - if (get_sha1_hex(buffer, sha1)) - die("expected sha1, got '%s'", (char *) buffer); - entry = convert_entry(sha1); - memcpy(buffer, sha1_to_hex(entry->new_sha1), 40); -} - -static unsigned int convert_mode(unsigned int mode) -{ - unsigned int newmode; - - newmode = mode & S_IFMT; - if (S_ISREG(mode)) - newmode |= (mode & 0100) ? 0755 : 0644; - return newmode; -} - -static int write_subdirectory(void *buffer, unsigned long size, const char *base, int baselen, unsigned char *result_sha1) -{ - char *new = xmalloc(size); - unsigned long newlen = 0; - unsigned long used; - - used = 0; - while (size) { - int len = 21 + strlen(buffer); - char *path = strchr(buffer, ' '); - unsigned char *sha1; - unsigned int mode; - char *slash, *origpath; - - if (!path || strtoul_ui(buffer, 8, &mode)) - die("bad tree conversion"); - mode = convert_mode(mode); - path++; - if (memcmp(path, base, baselen)) - break; - origpath = path; - path += baselen; - slash = strchr(path, '/'); - if (!slash) { - newlen += sprintf(new + newlen, "%o %s", mode, path); - new[newlen++] = '\0'; - hashcpy((unsigned char *)new + newlen, (unsigned char *) buffer + len - 20); - newlen += 20; - - used += len; - size -= len; - buffer = (char *) buffer + len; - continue; - } - - newlen += sprintf(new + newlen, "%o %.*s", S_IFDIR, (int)(slash - path), path); - new[newlen++] = 0; - sha1 = (unsigned char *)(new + newlen); - newlen += 20; - - len = write_subdirectory(buffer, size, origpath, slash-origpath+1, sha1); - - used += len; - size -= len; - buffer = (char *) buffer + len; - } - - write_sha1_file(new, newlen, tree_type, result_sha1); - free(new); - return used; -} - -static void convert_tree(void *buffer, unsigned long size, unsigned char *result_sha1) -{ - void *orig_buffer = buffer; - unsigned long orig_size = size; - - while (size) { - size_t len = 1+strlen(buffer); - - convert_binary_sha1((char *) buffer + len); - - len += 20; - if (len > size) - die("corrupt tree object"); - size -= len; - buffer = (char *) buffer + len; - } - - write_subdirectory(orig_buffer, orig_size, "", 0, result_sha1); -} - -static unsigned long parse_oldstyle_date(const char *buf) -{ - char c, *p; - char buffer[100]; - struct tm tm; - const char *formats[] = { - "%c", - "%a %b %d %T", - "%Z", - "%Y", - " %Y", - NULL - }; - /* We only ever did two timezones in the bad old format .. */ - const char *timezones[] = { - "PDT", "PST", "CEST", NULL - }; - const char **fmt = formats; - - p = buffer; - while (isspace(c = *buf)) - buf++; - while ((c = *buf++) != '\n') - *p++ = c; - *p++ = 0; - buf = buffer; - memset(&tm, 0, sizeof(tm)); - do { - const char *next = strptime(buf, *fmt, &tm); - if (next) { - if (!*next) - return mktime(&tm); - buf = next; - } else { - const char **p = timezones; - while (isspace(*buf)) - buf++; - while (*p) { - if (!memcmp(buf, *p, strlen(*p))) { - buf += strlen(*p); - break; - } - p++; - } - } - fmt++; - } while (*buf && *fmt); - printf("left: %s\n", buf); - return mktime(&tm); -} - -static int convert_date_line(char *dst, void **buf, unsigned long *sp) -{ - unsigned long size = *sp; - char *line = *buf; - char *next = strchr(line, '\n'); - char *date = strchr(line, '>'); - int len; - - if (!next || !date) - die("missing or bad author/committer line %s", line); - next++; date += 2; - - *buf = next; - *sp = size - (next - line); - - len = date - line; - memcpy(dst, line, len); - dst += len; - - /* Is it already in new format? */ - if (isdigit(*date)) { - int datelen = next - date; - memcpy(dst, date, datelen); - return len + datelen; - } - - /* - * Hacky hacky: one of the sparse old-style commits does not have - * any date at all, but we can fake it by using the committer date. - */ - if (*date == '\n' && strchr(next, '>')) - date = strchr(next, '>')+2; - - return len + sprintf(dst, "%lu -0700\n", parse_oldstyle_date(date)); -} - -static void convert_date(void *buffer, unsigned long size, unsigned char *result_sha1) -{ - char *new = xmalloc(size + 100); - unsigned long newlen = 0; - - /* "tree <sha1>\n" */ - memcpy(new + newlen, buffer, 46); - newlen += 46; - buffer = (char *) buffer + 46; - size -= 46; - - /* "parent <sha1>\n" */ - while (!memcmp(buffer, "parent ", 7)) { - memcpy(new + newlen, buffer, 48); - newlen += 48; - buffer = (char *) buffer + 48; - size -= 48; - } - - /* "author xyz <xyz> date" */ - newlen += convert_date_line(new + newlen, &buffer, &size); - /* "committer xyz <xyz> date" */ - newlen += convert_date_line(new + newlen, &buffer, &size); - - /* Rest */ - memcpy(new + newlen, buffer, size); - newlen += size; - - write_sha1_file(new, newlen, commit_type, result_sha1); - free(new); -} - -static void convert_commit(void *buffer, unsigned long size, unsigned char *result_sha1) -{ - void *orig_buffer = buffer; - unsigned long orig_size = size; - - if (memcmp(buffer, "tree ", 5)) - die("Bad commit '%s'", (char *) buffer); - convert_ascii_sha1((char *) buffer + 5); - buffer = (char *) buffer + 46; /* "tree " + "hex sha1" + "\n" */ - while (!memcmp(buffer, "parent ", 7)) { - convert_ascii_sha1((char *) buffer + 7); - buffer = (char *) buffer + 48; - } - convert_date(orig_buffer, orig_size, result_sha1); -} - -static struct entry * convert_entry(unsigned char *sha1) -{ - struct entry *entry = lookup_entry(sha1); - enum object_type type; - void *buffer, *data; - unsigned long size; - - if (entry->converted) - return entry; - data = read_sha1_file(sha1, &type, &size); - if (!data) - die("unable to read object %s", sha1_to_hex(sha1)); - - buffer = xmalloc(size); - memcpy(buffer, data, size); - - if (type == OBJ_BLOB) { - write_sha1_file(buffer, size, blob_type, entry->new_sha1); - } else if (type == OBJ_TREE) - convert_tree(buffer, size, entry->new_sha1); - else if (type == OBJ_COMMIT) - convert_commit(buffer, size, entry->new_sha1); - else - die("unknown object type %d in %s", type, sha1_to_hex(sha1)); - entry->converted = 1; - free(buffer); - free(data); - return entry; -} - -int main(int argc, char **argv) -{ - unsigned char sha1[20]; - struct entry *entry; - - setup_git_directory(); - - if (argc != 2) - usage("git-convert-objects <sha1>"); - if (get_sha1(argv[1], sha1)) - die("Not a valid object name %s", argv[1]); - - entry = convert_entry(sha1); - printf("new sha1: %s\n", sha1_to_hex(entry->new_sha1)); - return 0; -} |