Andrew's git - gitweb.git/blob

   1/*
   2 * GIT - the stupid content tracker
   3 *
   4 * Copyright (c) Junio C Hamano, 2006
   5 */
   6#include "cache.h"
   7#include "strbuf.h"
   8#include "quote.h"
   9
  10static struct treeent {
  11        unsigned mode;
  12        unsigned char sha1[20];
  13        int len;
  14        char name[FLEX_ARRAY];
  15} **entries;
  16static int alloc, used;
  17
  18static void append_to_tree(unsigned mode, unsigned char *sha1, char *path)
  19{
  20        struct treeent *ent;
  21        int len = strlen(path);
  22        if (strchr(path, '/'))
  23                die("path %s contains slash", path);
  24
  25        if (alloc <= used) {
  26                alloc = alloc_nr(used);
  27                entries = xrealloc(entries, sizeof(*entries) * alloc);
  28        }
  29        ent = entries[used++] = xmalloc(sizeof(**entries) + len + 1);
  30        ent->mode = mode;
  31        ent->len = len;
  32        memcpy(ent->sha1, sha1, 20);
  33        memcpy(ent->name, path, len+1);
  34}
  35
  36static int ent_compare(const void *a_, const void *b_)
  37{
  38        struct treeent *a = *(struct treeent **)a_;
  39        struct treeent *b = *(struct treeent **)b_;
  40        return base_name_compare(a->name, a->len, a->mode,
  41                                 b->name, b->len, b->mode);
  42}
  43
  44static void write_tree(unsigned char *sha1)
  45{
  46        char *buffer;
  47        unsigned long size, offset;
  48        int i;
  49
  50        qsort(entries, used, sizeof(*entries), ent_compare);
  51        size = 100;
  52        for (size = i = 0; i < used; i++)
  53                size += 32 + entries[i]->len;
  54        buffer = xmalloc(size);
  55        offset = 0;
  56
  57        for (i = 0; i < used; i++) {
  58                struct treeent *ent = entries[i];
  59
  60                if (offset + ent->len + 100 < size) {
  61                        size = alloc_nr(offset + ent->len + 100);
  62                        buffer = xrealloc(buffer, size);
  63                }
  64                offset += sprintf(buffer + offset, "%o ", ent->mode);
  65                offset += sprintf(buffer + offset, "%s", ent->name);
  66                buffer[offset++] = 0;
  67                memcpy(buffer + offset, ent->sha1, 20);
  68                offset += 20;
  69        }
  70        write_sha1_file(buffer, offset, "tree", sha1);
  71}
  72
  73static const char mktree_usage[] = "mktree [-z]";
  74
  75int main(int ac, char **av)
  76{
  77        struct strbuf sb;
  78        unsigned char sha1[20];
  79        int line_termination = '\n';
  80
  81        setup_git_directory();
  82
  83        while ((1 < ac) && av[1][0] == '-') {
  84                char *arg = av[1];
  85                if (!strcmp("-z", arg))
  86                        line_termination = 0;
  87                else
  88                        usage(mktree_usage);
  89                ac--;
  90                av++;
  91        }
  92
  93        strbuf_init(&sb);
  94        while (1) {
  95                int len;
  96                char *ptr, *ntr;
  97                unsigned mode;
  98                char type[20];
  99                char *path;
 100
 101                read_line(&sb, stdin, line_termination);
 102                if (sb.eof)
 103                        break;
 104                len = sb.len;
 105                ptr = sb.buf;
 106                /* Input is non-recursive ls-tree output format
 107                 * mode SP type SP sha1 TAB name
 108                 */
 109                mode = strtoul(ptr, &ntr, 8);
 110                if (ptr == ntr || !ntr || *ntr != ' ')
 111                        die("input format error: %s", sb.buf);
 112                ptr = ntr + 1; /* type */
 113                ntr = strchr(ptr, ' ');
 114                if (!ntr || sb.buf + len <= ntr + 41 ||
 115                    ntr[41] != '\t' ||
 116                    get_sha1_hex(ntr + 1, sha1))
 117                        die("input format error: %s", sb.buf);
 118                if (sha1_object_info(sha1, type, NULL))
 119                        die("object %s unavailable", sha1_to_hex(sha1));
 120                *ntr++ = 0; /* now at the beginning of SHA1 */
 121                if (strcmp(ptr, type))
 122                        die("object type %s mismatch (%s)", ptr, type);
 123                ntr += 41; /* at the beginning of name */
 124                if (line_termination && ntr[0] == '"')
 125                        path = unquote_c_style(ntr, NULL);
 126                else
 127                        path = ntr;
 128
 129                append_to_tree(mode, sha1, path);
 130
 131                if (path != ntr)
 132                        free(path);
 133        }
 134        write_tree(sha1);
 135        puts(sha1_to_hex(sha1));
 136        exit(0);
 137}