am doc: add a pointer to relevant hooks
[gitweb.git] / fast-import.c
index 5f539d7d8f7e087423734fb1d19e0d5e580fbe6e..4fd18a3574a6e72bb7a299b26b3f97fa20b8052d 100644 (file)
@@ -22,8 +22,8 @@ Format of STDIN stream:
     ('author' (sp name)? sp '<' email '>' sp when lf)?
     'committer' (sp name)? sp '<' email '>' sp when lf
     commit_msg
-    ('from' sp committish lf)?
-    ('merge' sp committish lf)*
+    ('from' sp commit-ish lf)?
+    ('merge' sp commit-ish lf)*
     (file_change | ls)*
     lf?;
   commit_msg ::= data;
@@ -43,18 +43,18 @@ Format of STDIN stream:
   file_obm ::= 'M' sp mode sp (hexsha1 | idnum) sp path_str lf;
   file_inm ::= 'M' sp mode sp 'inline' sp path_str lf
     data;
-  note_obm ::= 'N' sp (hexsha1 | idnum) sp committish lf;
-  note_inm ::= 'N' sp 'inline' sp committish lf
+  note_obm ::= 'N' sp (hexsha1 | idnum) sp commit-ish lf;
+  note_inm ::= 'N' sp 'inline' sp commit-ish lf
     data;
 
   new_tag ::= 'tag' sp tag_str lf
-    'from' sp committish lf
+    'from' sp commit-ish lf
     ('tagger' (sp name)? sp '<' email '>' sp when lf)?
     tag_msg;
   tag_msg ::= data;
 
   reset_branch ::= 'reset' sp ref_str lf
-    ('from' sp committish lf)?
+    ('from' sp commit-ish lf)?
     lf?;
 
   checkpoint ::= 'checkpoint' lf
@@ -93,7 +93,7 @@ Format of STDIN stream:
      # stream formatting is: \, " and LF.  Otherwise these values
      # are UTF8.
      #
-  committish  ::= (ref_str | hexsha1 | sha1exp_str | idnum);
+  commit-ish  ::= (ref_str | hexsha1 | sha1exp_str | idnum);
   ref_str     ::= ref;
   sha1exp_str ::= sha1exp;
   tag_str     ::= tag;
@@ -297,7 +297,7 @@ static int failure;
 static FILE *pack_edges;
 static unsigned int show_stats = 1;
 static int global_argc;
-static const char **global_argv;
+static char **global_argv;
 
 /* Memory pools */
 static size_t mem_pool_alloc = 2*1024*1024 - sizeof(struct mem_pool);
@@ -1568,7 +1568,8 @@ static int tree_content_set(
 static int tree_content_remove(
        struct tree_entry *root,
        const char *p,
-       struct tree_entry *backup_leaf)
+       struct tree_entry *backup_leaf,
+       int allow_root)
 {
        struct tree_content *t;
        const char *slash1;
@@ -1583,6 +1584,12 @@ static int tree_content_remove(
 
        if (!root->tree)
                load_tree(root);
+
+       if (!*p && allow_root) {
+               e = root;
+               goto del_entry;
+       }
+
        t = root->tree;
        for (i = 0; i < t->entry_count; i++) {
                e = t->entries[i];
@@ -1599,7 +1606,7 @@ static int tree_content_remove(
                                goto del_entry;
                        if (!e->tree)
                                load_tree(e);
-                       if (tree_content_remove(e, slash1 + 1, backup_leaf)) {
+                       if (tree_content_remove(e, slash1 + 1, backup_leaf, 0)) {
                                for (n = 0; n < e->tree->entry_count; n++) {
                                        if (e->tree->entries[n]->versions[1].mode) {
                                                hashclr(root->versions[1].sha1);
@@ -1629,7 +1636,8 @@ static int tree_content_remove(
 static int tree_content_get(
        struct tree_entry *root,
        const char *p,
-       struct tree_entry *leaf)
+       struct tree_entry *leaf,
+       int allow_root)
 {
        struct tree_content *t;
        const char *slash1;
@@ -1641,31 +1649,39 @@ static int tree_content_get(
                n = slash1 - p;
        else
                n = strlen(p);
-       if (!n)
+       if (!n && !allow_root)
                die("Empty path component found in input");
 
        if (!root->tree)
                load_tree(root);
+
+       if (!n) {
+               e = root;
+               goto found_entry;
+       }
+
        t = root->tree;
        for (i = 0; i < t->entry_count; i++) {
                e = t->entries[i];
                if (e->name->str_len == n && !strncmp_icase(p, e->name->str_dat, n)) {
-                       if (!slash1) {
-                               memcpy(leaf, e, sizeof(*leaf));
-                               if (e->tree && is_null_sha1(e->versions[1].sha1))
-                                       leaf->tree = dup_tree_content(e->tree);
-                               else
-                                       leaf->tree = NULL;
-                               return 1;
-                       }
+                       if (!slash1)
+                               goto found_entry;
                        if (!S_ISDIR(e->versions[1].mode))
                                return 0;
                        if (!e->tree)
                                load_tree(e);
-                       return tree_content_get(e, slash1 + 1, leaf);
+                       return tree_content_get(e, slash1 + 1, leaf, 0);
                }
        }
        return 0;
+
+found_entry:
+       memcpy(leaf, e, sizeof(*leaf));
+       if (e->tree && is_null_sha1(e->versions[1].sha1))
+               leaf->tree = dup_tree_content(e->tree);
+       else
+               leaf->tree = NULL;
+       return 1;
 }
 
 static int update_branch(struct branch *b)
@@ -1678,7 +1694,7 @@ static int update_branch(struct branch *b)
                return 0;
        if (read_ref(b->name, old_sha1))
                hashclr(old_sha1);
-       lock = lock_any_ref_for_update(b->name, old_sha1, 0);
+       lock = lock_any_ref_for_update(b->name, old_sha1, 0, NULL);
        if (!lock)
                return error("Unable to lock %s", b->name);
        if (!force_update && !is_null_sha1(old_sha1)) {
@@ -1822,7 +1838,7 @@ static void read_marks(void)
                *end = 0;
                mark = strtoumax(line + 1, &end, 10);
                if (!mark || end == line + 1
-                       || *end != ' ' || get_sha1(end + 1, sha1))
+                       || *end != ' ' || get_sha1_hex(end + 1, sha1))
                        die("corrupt mark line: %s", line);
                e = find_object(sha1);
                if (!e) {
@@ -1861,8 +1877,8 @@ static int read_next_command(void)
                                return EOF;
 
                        if (!seen_data_command
-                               && prefixcmp(command_buf.buf, "feature ")
-                               && prefixcmp(command_buf.buf, "option ")) {
+                               && !starts_with(command_buf.buf, "feature ")
+                               && !starts_with(command_buf.buf, "option ")) {
                                parse_argv();
                        }
 
@@ -1882,7 +1898,7 @@ static int read_next_command(void)
                        rc->prev->next = rc;
                        cmd_tail = rc;
                }
-               if (!prefixcmp(command_buf.buf, "cat-blob ")) {
+               if (starts_with(command_buf.buf, "cat-blob ")) {
                        parse_cat_blob();
                        continue;
                }
@@ -1901,7 +1917,7 @@ static void skip_optional_lf(void)
 
 static void parse_mark(void)
 {
-       if (!prefixcmp(command_buf.buf, "mark :")) {
+       if (starts_with(command_buf.buf, "mark :")) {
                next_mark = strtoumax(command_buf.buf + 6, NULL, 10);
                read_next_command();
        }
@@ -1913,10 +1929,10 @@ static int parse_data(struct strbuf *sb, uintmax_t limit, uintmax_t *len_res)
 {
        strbuf_reset(sb);
 
-       if (prefixcmp(command_buf.buf, "data "))
+       if (!starts_with(command_buf.buf, "data "))
                die("Expected 'data n' command, found: %s", command_buf.buf);
 
-       if (!prefixcmp(command_buf.buf + 5, "<<")) {
+       if (starts_with(command_buf.buf + 5, "<<")) {
                char *term = xstrdup(command_buf.buf + 5 + 2);
                size_t term_len = command_buf.len - 5 - 2;
 
@@ -2179,7 +2195,7 @@ static uintmax_t do_change_note_fanout(
                        }
 
                        /* Rename fullpath to realpath */
-                       if (!tree_content_remove(orig_root, fullpath, &leaf))
+                       if (!tree_content_remove(orig_root, fullpath, &leaf, 0))
                                die("Failed to remove path %s", fullpath);
                        tree_content_set(orig_root, realpath,
                                leaf.versions[1].sha1,
@@ -2290,7 +2306,7 @@ static void file_change_m(struct branch *b)
        if (*p == ':') {
                oe = find_mark(parse_mark_ref_space(&p));
                hashcpy(sha1, oe->idx.sha1);
-       } else if (!prefixcmp(p, "inline ")) {
+       } else if (starts_with(p, "inline ")) {
                inline_data = 1;
                oe = NULL; /* not used with inline_data, but makes gcc happy */
                p += strlen("inline");  /* advance to space */
@@ -2314,7 +2330,7 @@ static void file_change_m(struct branch *b)
 
        /* Git does not track empty, non-toplevel directories. */
        if (S_ISDIR(mode) && !memcmp(sha1, EMPTY_TREE_SHA1_BIN, 20) && *p) {
-               tree_content_remove(&b->branch_tree, p, NULL);
+               tree_content_remove(&b->branch_tree, p, NULL, 0);
                return;
        }
 
@@ -2375,7 +2391,7 @@ static void file_change_d(struct branch *b)
                        die("Garbage after path in: %s", command_buf.buf);
                p = uq.buf;
        }
-       tree_content_remove(&b->branch_tree, p, NULL);
+       tree_content_remove(&b->branch_tree, p, NULL, 1);
 }
 
 static void file_change_cr(struct branch *b, int rename)
@@ -2413,9 +2429,9 @@ static void file_change_cr(struct branch *b, int rename)
 
        memset(&leaf, 0, sizeof(leaf));
        if (rename)
-               tree_content_remove(&b->branch_tree, s, &leaf);
+               tree_content_remove(&b->branch_tree, s, &leaf, 1);
        else
-               tree_content_get(&b->branch_tree, s, &leaf);
+               tree_content_get(&b->branch_tree, s, &leaf, 1);
        if (!leaf.versions[1].mode)
                die("Path %s not in branch", s);
        if (!*d) {      /* C "path/to/subdir" "" */
@@ -2463,7 +2479,7 @@ static void note_change_n(struct branch *b, unsigned char *old_fanout)
        if (*p == ':') {
                oe = find_mark(parse_mark_ref_space(&p));
                hashcpy(sha1, oe->idx.sha1);
-       } else if (!prefixcmp(p, "inline ")) {
+       } else if (starts_with(p, "inline ")) {
                inline_data = 1;
                oe = NULL; /* not used with inline_data, but makes gcc happy */
                p += strlen("inline");  /* advance to space */
@@ -2478,7 +2494,7 @@ static void note_change_n(struct branch *b, unsigned char *old_fanout)
        assert(*p == ' ');
        p++;  /* skip space */
 
-       /* <committish> */
+       /* <commit-ish> */
        s = lookup_branch(p);
        if (s) {
                if (is_null_sha1(s->sha1))
@@ -2521,7 +2537,7 @@ static void note_change_n(struct branch *b, unsigned char *old_fanout)
        }
 
        construct_path_with_fanout(sha1_to_hex(commit_sha1), *old_fanout, path);
-       if (tree_content_remove(&b->branch_tree, path, NULL))
+       if (tree_content_remove(&b->branch_tree, path, NULL, 0))
                b->num_notes--;
 
        if (is_null_sha1(sha1))
@@ -2574,7 +2590,7 @@ static int parse_from(struct branch *b)
        const char *from;
        struct branch *s;
 
-       if (prefixcmp(command_buf.buf, "from "))
+       if (!starts_with(command_buf.buf, "from "))
                return 0;
 
        if (b->branch_tree.tree) {
@@ -2620,7 +2636,7 @@ static struct hash_list *parse_merge(unsigned int *count)
        struct branch *s;
 
        *count = 0;
-       while (!prefixcmp(command_buf.buf, "merge ")) {
+       while (starts_with(command_buf.buf, "merge ")) {
                from = strchr(command_buf.buf, ' ') + 1;
                n = xmalloc(sizeof(*n));
                s = lookup_branch(from);
@@ -2671,11 +2687,11 @@ static void parse_new_commit(void)
 
        read_next_command();
        parse_mark();
-       if (!prefixcmp(command_buf.buf, "author ")) {
+       if (starts_with(command_buf.buf, "author ")) {
                author = parse_ident(command_buf.buf + 7);
                read_next_command();
        }
-       if (!prefixcmp(command_buf.buf, "committer ")) {
+       if (starts_with(command_buf.buf, "committer ")) {
                committer = parse_ident(command_buf.buf + 10);
                read_next_command();
        }
@@ -2696,19 +2712,19 @@ static void parse_new_commit(void)
 
        /* file_change* */
        while (command_buf.len > 0) {
-               if (!prefixcmp(command_buf.buf, "M "))
+               if (starts_with(command_buf.buf, "M "))
                        file_change_m(b);
-               else if (!prefixcmp(command_buf.buf, "D "))
+               else if (starts_with(command_buf.buf, "D "))
                        file_change_d(b);
-               else if (!prefixcmp(command_buf.buf, "R "))
+               else if (starts_with(command_buf.buf, "R "))
                        file_change_cr(b, 1);
-               else if (!prefixcmp(command_buf.buf, "C "))
+               else if (starts_with(command_buf.buf, "C "))
                        file_change_cr(b, 0);
-               else if (!prefixcmp(command_buf.buf, "N "))
+               else if (starts_with(command_buf.buf, "N "))
                        note_change_n(b, &prev_fanout);
                else if (!strcmp("deleteall", command_buf.buf))
                        file_change_deleteall(b);
-               else if (!prefixcmp(command_buf.buf, "ls "))
+               else if (starts_with(command_buf.buf, "ls "))
                        parse_ls(b);
                else {
                        unread_command_buf = 1;
@@ -2777,7 +2793,7 @@ static void parse_new_tag(void)
        read_next_command();
 
        /* from ... */
-       if (prefixcmp(command_buf.buf, "from "))
+       if (!starts_with(command_buf.buf, "from "))
                die("Expected from command, got %s", command_buf.buf);
        from = strchr(command_buf.buf, ' ') + 1;
        s = lookup_branch(from);
@@ -2805,7 +2821,7 @@ static void parse_new_tag(void)
        read_next_command();
 
        /* tagger ... */
-       if (!prefixcmp(command_buf.buf, "tagger ")) {
+       if (starts_with(command_buf.buf, "tagger ")) {
                tagger = parse_ident(command_buf.buf + 7);
                read_next_command();
        } else
@@ -2957,7 +2973,7 @@ static struct object_entry *dereference(struct object_entry *oe,
        case OBJ_TAG:
                break;
        default:
-               die("Not a treeish: %s", command_buf.buf);
+               die("Not a tree-ish: %s", command_buf.buf);
        }
 
        if (oe->pack_id != MAX_PACK_ID) {       /* in a pack being written */
@@ -3041,7 +3057,7 @@ static void parse_ls(struct branch *b)
        struct tree_entry *root = NULL;
        struct tree_entry leaf = {NULL};
 
-       /* ls SP (<treeish> SP)? <path> */
+       /* ls SP (<tree-ish> SP)? <path> */
        p = command_buf.buf + strlen("ls ");
        if (*p == '"') {
                if (!b)
@@ -3051,6 +3067,8 @@ static void parse_ls(struct branch *b)
                struct object_entry *e = parse_treeish_dataref(&p);
                root = new_tree_entry();
                hashcpy(root->versions[1].sha1, e->idx.sha1);
+               if (!is_null_sha1(root->versions[1].sha1))
+                       root->versions[1].mode = S_IFDIR;
                load_tree(root);
                if (*p++ != ' ')
                        die("Missing space after tree-ish: %s", command_buf.buf);
@@ -3065,7 +3083,7 @@ static void parse_ls(struct branch *b)
                        die("Garbage after path in: %s", command_buf.buf);
                p = uq.buf;
        }
-       tree_content_get(root, p, &leaf);
+       tree_content_get(root, p, &leaf, 1);
        /*
         * A directory in preparation would have a sha1 of zero
         * until it is saved.  Save, for simplicity.
@@ -3191,7 +3209,7 @@ static void option_export_pack_edges(const char *edges)
 
 static int parse_one_option(const char *option)
 {
-       if (!prefixcmp(option, "max-pack-size=")) {
+       if (starts_with(option, "max-pack-size=")) {
                unsigned long v;
                if (!git_parse_ulong(option + 14, &v))
                        return 0;
@@ -3203,20 +3221,20 @@ static int parse_one_option(const char *option)
                        v = 1024 * 1024;
                }
                max_packsize = v;
-       } else if (!prefixcmp(option, "big-file-threshold=")) {
+       } else if (starts_with(option, "big-file-threshold=")) {
                unsigned long v;
                if (!git_parse_ulong(option + 19, &v))
                        return 0;
                big_file_threshold = v;
-       } else if (!prefixcmp(option, "depth=")) {
+       } else if (starts_with(option, "depth=")) {
                option_depth(option + 6);
-       } else if (!prefixcmp(option, "active-branches=")) {
+       } else if (starts_with(option, "active-branches=")) {
                option_active_branches(option + 16);
-       } else if (!prefixcmp(option, "export-pack-edges=")) {
+       } else if (starts_with(option, "export-pack-edges=")) {
                option_export_pack_edges(option + 18);
-       } else if (!prefixcmp(option, "quiet")) {
+       } else if (starts_with(option, "quiet")) {
                show_stats = 0;
-       } else if (!prefixcmp(option, "stats")) {
+       } else if (starts_with(option, "stats")) {
                show_stats = 1;
        } else {
                return 0;
@@ -3227,14 +3245,14 @@ static int parse_one_option(const char *option)
 
 static int parse_one_feature(const char *feature, int from_stream)
 {
-       if (!prefixcmp(feature, "date-format=")) {
+       if (starts_with(feature, "date-format=")) {
                option_date_format(feature + 12);
-       } else if (!prefixcmp(feature, "import-marks=")) {
+       } else if (starts_with(feature, "import-marks=")) {
                option_import_marks(feature + 13, from_stream, 0);
-       } else if (!prefixcmp(feature, "import-marks-if-exists=")) {
+       } else if (starts_with(feature, "import-marks-if-exists=")) {
                option_import_marks(feature + strlen("import-marks-if-exists="),
                                        from_stream, 1);
-       } else if (!prefixcmp(feature, "export-marks=")) {
+       } else if (starts_with(feature, "export-marks=")) {
                option_export_marks(feature + 13);
        } else if (!strcmp(feature, "cat-blob")) {
                ; /* Don't die - this feature is supported */
@@ -3332,7 +3350,7 @@ static void parse_argv(void)
                if (parse_one_feature(a + 2, 0))
                        continue;
 
-               if (!prefixcmp(a + 2, "cat-blob-fd=")) {
+               if (starts_with(a + 2, "cat-blob-fd=")) {
                        option_cat_blob_fd(a + 2 + strlen("cat-blob-fd="));
                        continue;
                }
@@ -3347,7 +3365,7 @@ static void parse_argv(void)
                read_marks();
 }
 
-int main(int argc, const char **argv)
+int main(int argc, char **argv)
 {
        unsigned int i;
 
@@ -3386,25 +3404,25 @@ int main(int argc, const char **argv)
        while (read_next_command() != EOF) {
                if (!strcmp("blob", command_buf.buf))
                        parse_new_blob();
-               else if (!prefixcmp(command_buf.buf, "ls "))
+               else if (starts_with(command_buf.buf, "ls "))
                        parse_ls(NULL);
-               else if (!prefixcmp(command_buf.buf, "commit "))
+               else if (starts_with(command_buf.buf, "commit "))
                        parse_new_commit();
-               else if (!prefixcmp(command_buf.buf, "tag "))
+               else if (starts_with(command_buf.buf, "tag "))
                        parse_new_tag();
-               else if (!prefixcmp(command_buf.buf, "reset "))
+               else if (starts_with(command_buf.buf, "reset "))
                        parse_reset_branch();
                else if (!strcmp("checkpoint", command_buf.buf))
                        parse_checkpoint();
                else if (!strcmp("done", command_buf.buf))
                        break;
-               else if (!prefixcmp(command_buf.buf, "progress "))
+               else if (starts_with(command_buf.buf, "progress "))
                        parse_progress();
-               else if (!prefixcmp(command_buf.buf, "feature "))
+               else if (starts_with(command_buf.buf, "feature "))
                        parse_feature();
-               else if (!prefixcmp(command_buf.buf, "option git "))
+               else if (starts_with(command_buf.buf, "option git "))
                        parse_option();
-               else if (!prefixcmp(command_buf.buf, "option "))
+               else if (starts_with(command_buf.buf, "option "))
                        /* ignore non-git options*/;
                else
                        die("Unsupported command: %s", command_buf.buf);