builtin / mktree.con commit Merge branch 'ew/update-server-info' (813a3a2)
   1/*
   2 * GIT - the stupid content tracker
   3 *
   4 * Copyright (c) Junio C Hamano, 2006, 2009
   5 */
   6#include "builtin.h"
   7#include "quote.h"
   8#include "tree.h"
   9#include "parse-options.h"
  10#include "object-store.h"
  11
  12static struct treeent {
  13        unsigned mode;
  14        struct object_id oid;
  15        int len;
  16        char name[FLEX_ARRAY];
  17} **entries;
  18static int alloc, used;
  19
  20static void append_to_tree(unsigned mode, struct object_id *oid, char *path)
  21{
  22        struct treeent *ent;
  23        size_t len = strlen(path);
  24        if (strchr(path, '/'))
  25                die("path %s contains slash", path);
  26
  27        FLEX_ALLOC_MEM(ent, name, path, len);
  28        ent->mode = mode;
  29        ent->len = len;
  30        oidcpy(&ent->oid, oid);
  31
  32        ALLOC_GROW(entries, used + 1, alloc);
  33        entries[used++] = ent;
  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(struct object_id *oid)
  45{
  46        struct strbuf buf;
  47        size_t size;
  48        int i;
  49
  50        QSORT(entries, used, ent_compare);
  51        for (size = i = 0; i < used; i++)
  52                size += 32 + entries[i]->len;
  53
  54        strbuf_init(&buf, size);
  55        for (i = 0; i < used; i++) {
  56                struct treeent *ent = entries[i];
  57                strbuf_addf(&buf, "%o %s%c", ent->mode, ent->name, '\0');
  58                strbuf_add(&buf, ent->oid.hash, the_hash_algo->rawsz);
  59        }
  60
  61        write_object_file(buf.buf, buf.len, tree_type, oid);
  62        strbuf_release(&buf);
  63}
  64
  65static const char *mktree_usage[] = {
  66        N_("git mktree [-z] [--missing] [--batch]"),
  67        NULL
  68};
  69
  70static void mktree_line(char *buf, int nul_term_line, int allow_missing)
  71{
  72        char *ptr, *ntr;
  73        const char *p;
  74        unsigned mode;
  75        enum object_type mode_type; /* object type derived from mode */
  76        enum object_type obj_type; /* object type derived from sha */
  77        char *path, *to_free = NULL;
  78        struct object_id oid;
  79
  80        ptr = buf;
  81        /*
  82         * Read non-recursive ls-tree output format:
  83         *     mode SP type SP sha1 TAB name
  84         */
  85        mode = strtoul(ptr, &ntr, 8);
  86        if (ptr == ntr || !ntr || *ntr != ' ')
  87                die("input format error: %s", buf);
  88        ptr = ntr + 1; /* type */
  89        ntr = strchr(ptr, ' ');
  90        if (!ntr || parse_oid_hex(ntr + 1, &oid, &p) ||
  91            *p != '\t')
  92                die("input format error: %s", buf);
  93
  94        /* It is perfectly normal if we do not have a commit from a submodule */
  95        if (S_ISGITLINK(mode))
  96                allow_missing = 1;
  97
  98
  99        *ntr++ = 0; /* now at the beginning of SHA1 */
 100
 101        path = (char *)p + 1;  /* at the beginning of name */
 102        if (!nul_term_line && path[0] == '"') {
 103                struct strbuf p_uq = STRBUF_INIT;
 104                if (unquote_c_style(&p_uq, path, NULL))
 105                        die("invalid quoting");
 106                path = to_free = strbuf_detach(&p_uq, NULL);
 107        }
 108
 109        /*
 110         * Object type is redundantly derivable three ways.
 111         * These should all agree.
 112         */
 113        mode_type = object_type(mode);
 114        if (mode_type != type_from_string(ptr)) {
 115                die("entry '%s' object type (%s) doesn't match mode type (%s)",
 116                        path, ptr, type_name(mode_type));
 117        }
 118
 119        /* Check the type of object identified by sha1 */
 120        obj_type = oid_object_info(the_repository, &oid, NULL);
 121        if (obj_type < 0) {
 122                if (allow_missing) {
 123                        ; /* no problem - missing objects are presumed to be of the right type */
 124                } else {
 125                        die("entry '%s' object %s is unavailable", path, oid_to_hex(&oid));
 126                }
 127        } else {
 128                if (obj_type != mode_type) {
 129                        /*
 130                         * The object exists but is of the wrong type.
 131                         * This is a problem regardless of allow_missing
 132                         * because the new tree entry will never be correct.
 133                         */
 134                        die("entry '%s' object %s is a %s but specified type was (%s)",
 135                                path, oid_to_hex(&oid), type_name(obj_type), type_name(mode_type));
 136                }
 137        }
 138
 139        append_to_tree(mode, &oid, path);
 140        free(to_free);
 141}
 142
 143int cmd_mktree(int ac, const char **av, const char *prefix)
 144{
 145        struct strbuf sb = STRBUF_INIT;
 146        struct object_id oid;
 147        int nul_term_line = 0;
 148        int allow_missing = 0;
 149        int is_batch_mode = 0;
 150        int got_eof = 0;
 151        strbuf_getline_fn getline_fn;
 152
 153        const struct option option[] = {
 154                OPT_BOOL('z', NULL, &nul_term_line, N_("input is NUL terminated")),
 155                OPT_SET_INT( 0 , "missing", &allow_missing, N_("allow missing objects"), 1),
 156                OPT_SET_INT( 0 , "batch", &is_batch_mode, N_("allow creation of more than one tree"), 1),
 157                OPT_END()
 158        };
 159
 160        ac = parse_options(ac, av, prefix, option, mktree_usage, 0);
 161        getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
 162
 163        while (!got_eof) {
 164                while (1) {
 165                        if (getline_fn(&sb, stdin) == EOF) {
 166                                got_eof = 1;
 167                                break;
 168                        }
 169                        if (sb.buf[0] == '\0') {
 170                                /* empty lines denote tree boundaries in batch mode */
 171                                if (is_batch_mode)
 172                                        break;
 173                                die("input format error: (blank line only valid in batch mode)");
 174                        }
 175                        mktree_line(sb.buf, nul_term_line, allow_missing);
 176                }
 177                if (is_batch_mode && got_eof && used < 1) {
 178                        /*
 179                         * Execution gets here if the last tree entry is terminated with a
 180                         * new-line.  The final new-line has been made optional to be
 181                         * consistent with the original non-batch behaviour of mktree.
 182                         */
 183                        ; /* skip creating an empty tree */
 184                } else {
 185                        write_tree(&oid);
 186                        puts(oid_to_hex(&oid));
 187                        fflush(stdout);
 188                }
 189                used=0; /* reset tree entry buffer for re-use in batch mode */
 190        }
 191        strbuf_release(&sb);
 192        exit(0);
 193}