commit_msg
('from' sp committish lf)?
('merge' sp committish lf)*
- file_change*
+ (file_change | ls)*
lf?;
commit_msg ::= data;
+ ls ::= 'ls' sp '"' quoted(path) '"' lf;
+
file_change ::= file_clr
| file_del
| file_rnm
ts ::= # time since the epoch in seconds, ascii base10 notation;
tz ::= # GIT style timezone;
- # note: comments may appear anywhere in the input, except
- # within a data command. Any form of the data command
- # always escapes the related input from comment processing.
+ # note: comments, ls and cat requests may appear anywhere
+ # in the input, except within a data command. Any form
+ # of the data command always escapes the related input
+ # from comment processing.
#
# In case it is not clear, the '#' that starts the comment
# must be the first character on that line (an lf
# preceded it).
#
+
+ cat_blob ::= 'cat-blob' sp (hexsha1 | idnum) lf;
+ ls_tree ::= 'ls' sp (hexsha1 | idnum) sp path_str lf;
+
comment ::= '#' not_lf* lf;
not_lf ::= # Any byte that is not ASCII newline (LF);
*/
#include "csum-file.h"
#include "quote.h"
#include "exec_cmd.h"
+#include "dir.h"
#define PACK_ID_BITS 16
#define MAX_PACK_ID ((1<<PACK_ID_BITS)-1)
#define DEPTH_BITS 13
#define MAX_DEPTH ((1<<DEPTH_BITS)-1)
-struct object_entry
-{
+struct object_entry {
struct pack_idx_entry idx;
struct object_entry *next;
uint32_t type : TYPE_BITS,
depth : DEPTH_BITS;
};
-struct object_entry_pool
-{
+struct object_entry_pool {
struct object_entry_pool *next_pool;
struct object_entry *next_free;
struct object_entry *end;
struct object_entry entries[FLEX_ARRAY]; /* more */
};
-struct mark_set
-{
+struct mark_set {
union {
struct object_entry *marked[1024];
struct mark_set *sets[1024];
unsigned int shift;
};
-struct last_object
-{
+struct last_object {
struct strbuf data;
off_t offset;
unsigned int depth;
unsigned no_swap : 1;
};
-struct mem_pool
-{
+struct mem_pool {
struct mem_pool *next_pool;
char *next_free;
char *end;
uintmax_t space[FLEX_ARRAY]; /* more */
};
-struct atom_str
-{
+struct atom_str {
struct atom_str *next_atom;
unsigned short str_len;
char str_dat[FLEX_ARRAY]; /* more */
};
struct tree_content;
-struct tree_entry
-{
+struct tree_entry {
struct tree_content *tree;
struct atom_str *name;
- struct tree_entry_ms
- {
+ struct tree_entry_ms {
uint16_t mode;
unsigned char sha1[20];
} versions[2];
};
-struct tree_content
-{
+struct tree_content {
unsigned int entry_capacity; /* must match avail_tree_content */
unsigned int entry_count;
unsigned int delta_depth;
struct tree_entry *entries[FLEX_ARRAY]; /* more */
};
-struct avail_tree_content
-{
+struct avail_tree_content {
unsigned int entry_capacity; /* must match tree_content */
struct avail_tree_content *next_avail;
};
-struct branch
-{
+struct branch {
struct branch *table_next_branch;
struct branch *active_next_branch;
const char *name;
unsigned char sha1[20];
};
-struct tag
-{
+struct tag {
struct tag *next_tag;
const char *name;
unsigned int pack_id;
unsigned char sha1[20];
};
-struct hash_list
-{
+struct hash_list {
struct hash_list *next;
unsigned char sha1[20];
};
WHENSPEC_NOW
} whenspec_type;
-struct recent_command
-{
+struct recent_command {
struct recent_command *prev;
struct recent_command *next;
char *buf;
/* Configured limits on output */
static unsigned long max_depth = 10;
static off_t max_packsize;
-static uintmax_t big_file_threshold = 512 * 1024 * 1024;
static int force_update;
static int pack_compression_level = Z_DEFAULT_COMPRESSION;
static int pack_compression_seen;
static const char *export_marks_file;
static const char *import_marks_file;
static int import_marks_file_from_stream;
+static int import_marks_file_ignore_missing;
static int relative_marks_paths;
/* Our last blob */
static struct strbuf new_data = STRBUF_INIT;
static int seen_data_command;
+/* Signal handling */
+static volatile sig_atomic_t checkpoint_requested;
+
+/* Where to write output of cat-blob commands */
+static int cat_blob_fd = STDOUT_FILENO;
+
static void parse_argv(void);
+static void parse_cat_blob(void);
+static void parse_ls(struct branch *b);
static void write_branch_report(FILE *rpt, struct branch *b)
{
exit(128);
}
+#ifndef SIGUSR1 /* Windows, for example */
+
+static void set_checkpoint_signal(void)
+{
+}
+
+#else
+
+static void checkpoint_signal(int signo)
+{
+ checkpoint_requested = 1;
+}
+
+static void set_checkpoint_signal(void)
+{
+ struct sigaction sa;
+
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_handler = checkpoint_signal;
+ sigemptyset(&sa.sa_mask);
+ sa.sa_flags = SA_RESTART;
+ sigaction(SIGUSR1, &sa, NULL);
+}
+
+#endif
+
static void alloc_objects(unsigned int cnt)
{
struct object_entry_pool *b;
p = xcalloc(1, sizeof(*p) + strlen(tmpfile) + 2);
strcpy(p->pack_name, tmpfile);
p->pack_fd = pack_fd;
+ p->do_not_close = 1;
pack_file = sha1fd(pack_fd, p->pack_name);
hdr.hdr_signature = htonl(PACK_SIGNATURE);
t->entry_count -= del;
}
+static void tree_content_replace(
+ struct tree_entry *root,
+ const unsigned char *sha1,
+ const uint16_t mode,
+ struct tree_content *newtree)
+{
+ if (!S_ISDIR(mode))
+ die("Root cannot be a non-directory");
+ hashcpy(root->versions[1].sha1, sha1);
+ if (root->tree)
+ release_tree_content_recursive(root->tree);
+ root->tree = newtree;
+}
+
static int tree_content_set(
struct tree_entry *root,
const char *p,
const uint16_t mode,
struct tree_content *subtree)
{
- struct tree_content *t = root->tree;
+ struct tree_content *t;
const char *slash1;
unsigned int i, n;
struct tree_entry *e;
if (!slash1 && !S_ISDIR(mode) && subtree)
die("Non-directories cannot have subtrees");
+ if (!root->tree)
+ load_tree(root);
+ t = root->tree;
for (i = 0; i < t->entry_count; i++) {
e = t->entries[i];
- if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
+ if (e->name->str_len == n && !strncmp_icase(p, e->name->str_dat, n)) {
if (!slash1) {
if (!S_ISDIR(mode)
&& e->versions[1].mode == mode
const char *p,
struct tree_entry *backup_leaf)
{
- struct tree_content *t = root->tree;
+ struct tree_content *t;
const char *slash1;
unsigned int i, n;
struct tree_entry *e;
else
n = strlen(p);
+ if (!root->tree)
+ load_tree(root);
+ t = root->tree;
for (i = 0; i < t->entry_count; i++) {
e = t->entries[i];
- if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
+ if (e->name->str_len == n && !strncmp_icase(p, e->name->str_dat, n)) {
if (slash1 && !S_ISDIR(e->versions[1].mode))
/*
* If p names a file in some subdirectory, and a
const char *p,
struct tree_entry *leaf)
{
- struct tree_content *t = root->tree;
+ struct tree_content *t;
const char *slash1;
unsigned int i, n;
struct tree_entry *e;
else
n = strlen(p);
+ if (!root->tree)
+ load_tree(root);
+ t = root->tree;
for (i = 0; i < t->entry_count; i++) {
e = t->entries[i];
- if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
+ 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))
{
char line[512];
FILE *f = fopen(import_marks_file, "r");
- if (!f)
+ if (f)
+ ;
+ else if (import_marks_file_ignore_missing && errno == ENOENT)
+ return; /* Marks file does not exist */
+ else
die_errno("cannot read '%s'", import_marks_file);
while (fgets(line, sizeof(line), f)) {
uintmax_t mark;
return EOF;
}
- do {
+ for (;;) {
if (unread_command_buf) {
unread_command_buf = 0;
} else {
rc->prev->next = rc;
cmd_tail = rc;
}
- } while (command_buf.buf[0] == '#');
-
- return 0;
+ if (!prefixcmp(command_buf.buf, "cat-blob ")) {
+ parse_cat_blob();
+ continue;
+ }
+ if (command_buf.buf[0] == '#')
+ continue;
+ return 0;
+ }
}
static void skip_optional_lf(void)
p = uq.buf;
}
+ /* 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);
+ return;
+ }
+
if (S_ISGITLINK(mode)) {
if (inline_data)
die("Git links cannot be specified 'inline': %s",
command_buf.buf);
}
+ if (!*p) {
+ tree_content_replace(&b->branch_tree, sha1, mode, NULL);
+ return;
+ }
tree_content_set(&b->branch_tree, p, sha1, mode, NULL);
}
tree_content_get(&b->branch_tree, s, &leaf);
if (!leaf.versions[1].mode)
die("Path %s not in branch", s);
+ if (!*d) { /* C "path/to/subdir" "" */
+ tree_content_replace(&b->branch_tree,
+ leaf.versions[1].sha1,
+ leaf.versions[1].mode,
+ leaf.tree);
+ return;
+ }
tree_content_set(&b->branch_tree, d,
leaf.versions[1].sha1,
leaf.versions[1].mode,
note_change_n(b, prev_fanout);
else if (!strcmp("deleteall", command_buf.buf))
file_change_deleteall(b);
+ else if (!prefixcmp(command_buf.buf, "ls "))
+ parse_ls(b);
else {
unread_command_buf = 1;
break;
unread_command_buf = 1;
}
-static void parse_checkpoint(void)
+static void cat_blob_write(const char *buf, unsigned long size)
{
+ if (write_in_full(cat_blob_fd, buf, size) != size)
+ die_errno("Write to frontend failed");
+}
+
+static void cat_blob(struct object_entry *oe, unsigned char sha1[20])
+{
+ struct strbuf line = STRBUF_INIT;
+ unsigned long size;
+ enum object_type type = 0;
+ char *buf;
+
+ if (!oe || oe->pack_id == MAX_PACK_ID) {
+ buf = read_sha1_file(sha1, &type, &size);
+ } else {
+ type = oe->type;
+ buf = gfi_unpack_entry(oe, &size);
+ }
+
+ /*
+ * Output based on batch_one_object() from cat-file.c.
+ */
+ if (type <= 0) {
+ strbuf_reset(&line);
+ strbuf_addf(&line, "%s missing\n", sha1_to_hex(sha1));
+ cat_blob_write(line.buf, line.len);
+ strbuf_release(&line);
+ free(buf);
+ return;
+ }
+ if (!buf)
+ die("Can't read object %s", sha1_to_hex(sha1));
+ if (type != OBJ_BLOB)
+ die("Object %s is a %s but a blob was expected.",
+ sha1_to_hex(sha1), typename(type));
+ strbuf_reset(&line);
+ strbuf_addf(&line, "%s %s %lu\n", sha1_to_hex(sha1),
+ typename(type), size);
+ cat_blob_write(line.buf, line.len);
+ strbuf_release(&line);
+ cat_blob_write(buf, size);
+ cat_blob_write("\n", 1);
+ free(buf);
+}
+
+static void parse_cat_blob(void)
+{
+ const char *p;
+ struct object_entry *oe = oe;
+ unsigned char sha1[20];
+
+ /* cat-blob SP <object> LF */
+ p = command_buf.buf + strlen("cat-blob ");
+ if (*p == ':') {
+ char *x;
+ oe = find_mark(strtoumax(p + 1, &x, 10));
+ if (x == p + 1)
+ die("Invalid mark: %s", command_buf.buf);
+ if (!oe)
+ die("Unknown mark: %s", command_buf.buf);
+ if (*x)
+ die("Garbage after mark: %s", command_buf.buf);
+ hashcpy(sha1, oe->idx.sha1);
+ } else {
+ if (get_sha1_hex(p, sha1))
+ die("Invalid SHA1: %s", command_buf.buf);
+ if (p[40])
+ die("Garbage after SHA1: %s", command_buf.buf);
+ oe = find_object(sha1);
+ }
+
+ cat_blob(oe, sha1);
+}
+
+static struct object_entry *dereference(struct object_entry *oe,
+ unsigned char sha1[20])
+{
+ unsigned long size;
+ char *buf = NULL;
+ if (!oe) {
+ enum object_type type = sha1_object_info(sha1, NULL);
+ if (type < 0)
+ die("object not found: %s", sha1_to_hex(sha1));
+ /* cache it! */
+ oe = insert_object(sha1);
+ oe->type = type;
+ oe->pack_id = MAX_PACK_ID;
+ oe->idx.offset = 1;
+ }
+ switch (oe->type) {
+ case OBJ_TREE: /* easy case. */
+ return oe;
+ case OBJ_COMMIT:
+ case OBJ_TAG:
+ break;
+ default:
+ die("Not a treeish: %s", command_buf.buf);
+ }
+
+ if (oe->pack_id != MAX_PACK_ID) { /* in a pack being written */
+ buf = gfi_unpack_entry(oe, &size);
+ } else {
+ enum object_type unused;
+ buf = read_sha1_file(sha1, &unused, &size);
+ }
+ if (!buf)
+ die("Can't load object %s", sha1_to_hex(sha1));
+
+ /* Peel one layer. */
+ switch (oe->type) {
+ case OBJ_TAG:
+ if (size < 40 + strlen("object ") ||
+ get_sha1_hex(buf + strlen("object "), sha1))
+ die("Invalid SHA1 in tag: %s", command_buf.buf);
+ break;
+ case OBJ_COMMIT:
+ if (size < 40 + strlen("tree ") ||
+ get_sha1_hex(buf + strlen("tree "), sha1))
+ die("Invalid SHA1 in commit: %s", command_buf.buf);
+ }
+
+ free(buf);
+ return find_object(sha1);
+}
+
+static struct object_entry *parse_treeish_dataref(const char **p)
+{
+ unsigned char sha1[20];
+ struct object_entry *e;
+
+ if (**p == ':') { /* <mark> */
+ char *endptr;
+ e = find_mark(strtoumax(*p + 1, &endptr, 10));
+ if (endptr == *p + 1)
+ die("Invalid mark: %s", command_buf.buf);
+ if (!e)
+ die("Unknown mark: %s", command_buf.buf);
+ *p = endptr;
+ hashcpy(sha1, e->idx.sha1);
+ } else { /* <sha1> */
+ if (get_sha1_hex(*p, sha1))
+ die("Invalid SHA1: %s", command_buf.buf);
+ e = find_object(sha1);
+ *p += 40;
+ }
+
+ while (!e || e->type != OBJ_TREE)
+ e = dereference(e, sha1);
+ return e;
+}
+
+static void print_ls(int mode, const unsigned char *sha1, const char *path)
+{
+ static struct strbuf line = STRBUF_INIT;
+
+ /* See show_tree(). */
+ const char *type =
+ S_ISGITLINK(mode) ? commit_type :
+ S_ISDIR(mode) ? tree_type :
+ blob_type;
+
+ if (!mode) {
+ /* missing SP path LF */
+ strbuf_reset(&line);
+ strbuf_addstr(&line, "missing ");
+ quote_c_style(path, &line, NULL, 0);
+ strbuf_addch(&line, '\n');
+ } else {
+ /* mode SP type SP object_name TAB path LF */
+ strbuf_reset(&line);
+ strbuf_addf(&line, "%06o %s %s\t",
+ mode, type, sha1_to_hex(sha1));
+ quote_c_style(path, &line, NULL, 0);
+ strbuf_addch(&line, '\n');
+ }
+ cat_blob_write(line.buf, line.len);
+}
+
+static void parse_ls(struct branch *b)
+{
+ const char *p;
+ struct tree_entry *root = NULL;
+ struct tree_entry leaf = {NULL};
+
+ /* ls SP (<treeish> SP)? <path> */
+ p = command_buf.buf + strlen("ls ");
+ if (*p == '"') {
+ if (!b)
+ die("Not in a commit: %s", command_buf.buf);
+ root = &b->branch_tree;
+ } else {
+ struct object_entry *e = parse_treeish_dataref(&p);
+ root = new_tree_entry();
+ hashcpy(root->versions[1].sha1, e->idx.sha1);
+ load_tree(root);
+ if (*p++ != ' ')
+ die("Missing space after tree-ish: %s", command_buf.buf);
+ }
+ if (*p == '"') {
+ static struct strbuf uq = STRBUF_INIT;
+ const char *endp;
+ strbuf_reset(&uq);
+ if (unquote_c_style(&uq, p, &endp))
+ die("Invalid path: %s", command_buf.buf);
+ if (*endp)
+ die("Garbage after path in: %s", command_buf.buf);
+ p = uq.buf;
+ }
+ tree_content_get(root, p, &leaf);
+ /*
+ * A directory in preparation would have a sha1 of zero
+ * until it is saved. Save, for simplicity.
+ */
+ if (S_ISDIR(leaf.versions[1].mode))
+ store_tree(&leaf);
+
+ print_ls(leaf.versions[1].mode, leaf.versions[1].sha1, p);
+ if (!b || root != &b->branch_tree)
+ release_tree_entry(root);
+}
+
+static void checkpoint(void)
+{
+ checkpoint_requested = 0;
if (object_count) {
cycle_packfile();
dump_branches();
dump_tags();
dump_marks();
}
+}
+
+static void parse_checkpoint(void)
+{
+ checkpoint_requested = 1;
skip_optional_lf();
}
return strbuf_detach(&abs_path, NULL);
}
-static void option_import_marks(const char *marks, int from_stream)
+static void option_import_marks(const char *marks,
+ int from_stream, int ignore_missing)
{
if (import_marks_file) {
if (from_stream)
import_marks_file = make_fast_import_path(marks);
safe_create_leading_directories_const(import_marks_file);
import_marks_file_from_stream = from_stream;
+ import_marks_file_ignore_missing = ignore_missing;
}
static void option_date_format(const char *fmt)
die("unknown --date-format argument %s", fmt);
}
+static unsigned long ulong_arg(const char *option, const char *arg)
+{
+ char *endptr;
+ unsigned long rv = strtoul(arg, &endptr, 0);
+ if (strchr(arg, '-') || endptr == arg || *endptr)
+ die("%s: argument must be a non-negative integer", option);
+ return rv;
+}
+
static void option_depth(const char *depth)
{
- max_depth = strtoul(depth, NULL, 0);
+ max_depth = ulong_arg("--depth", depth);
if (max_depth > MAX_DEPTH)
die("--depth cannot exceed %u", MAX_DEPTH);
}
static void option_active_branches(const char *branches)
{
- max_active_branches = strtoul(branches, NULL, 0);
+ max_active_branches = ulong_arg("--active-branches", branches);
}
static void option_export_marks(const char *marks)
safe_create_leading_directories_const(export_marks_file);
}
+static void option_cat_blob_fd(const char *fd)
+{
+ unsigned long n = ulong_arg("--cat-blob-fd", fd);
+ if (n > (unsigned long) INT_MAX)
+ die("--cat-blob-fd cannot exceed %d", INT_MAX);
+ cat_blob_fd = (int) n;
+}
+
static void option_export_pack_edges(const char *edges)
{
if (pack_edges)
if (!prefixcmp(feature, "date-format=")) {
option_date_format(feature + 12);
} else if (!prefixcmp(feature, "import-marks=")) {
- option_import_marks(feature + 13, from_stream);
+ option_import_marks(feature + 13, from_stream, 0);
+ } else if (!prefixcmp(feature, "import-marks-if-exists=")) {
+ option_import_marks(feature + strlen("import-marks-if-exists="),
+ from_stream, 1);
} else if (!prefixcmp(feature, "export-marks=")) {
option_export_marks(feature + 13);
- } else if (!prefixcmp(feature, "relative-marks")) {
+ } else if (!strcmp(feature, "cat-blob")) {
+ ; /* Don't die - this feature is supported */
+ } else if (!strcmp(feature, "relative-marks")) {
relative_marks_paths = 1;
- } else if (!prefixcmp(feature, "no-relative-marks")) {
+ } else if (!strcmp(feature, "no-relative-marks")) {
relative_marks_paths = 0;
- } else if (!prefixcmp(feature, "force")) {
+ } else if (!strcmp(feature, "force")) {
force_update = 1;
+ } else if (!strcmp(feature, "notes") || !strcmp(feature, "ls")) {
+ ; /* do nothing; we have the feature */
} else {
return 0;
}
max_packsize = git_config_ulong(k, v);
return 0;
}
- if (!strcmp(k, "core.bigfilethreshold")) {
- long n = git_config_int(k, v);
- big_file_threshold = 0 < n ? n : 0;
- }
return git_default_config(k, v, cb);
}
if (parse_one_feature(a + 2, 0))
continue;
+ if (!prefixcmp(a + 2, "cat-blob-fd=")) {
+ option_cat_blob_fd(a + 2 + strlen("cat-blob-fd="));
+ continue;
+ }
+
die("unknown option %s", a);
}
if (i != global_argc)
prepare_packed_git();
start_packfile();
set_die_routine(die_nicely);
+ set_checkpoint_signal();
while (read_next_command() != EOF) {
if (!strcmp("blob", command_buf.buf))
parse_new_blob();
+ else if (!prefixcmp(command_buf.buf, "ls "))
+ parse_ls(NULL);
else if (!prefixcmp(command_buf.buf, "commit "))
parse_new_commit();
else if (!prefixcmp(command_buf.buf, "tag "))
/* ignore non-git options*/;
else
die("Unsupported command: %s", command_buf.buf);
+
+ if (checkpoint_requested)
+ checkpoint();
}
/* argv hasn't been parsed yet, do so */