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Diffstat (limited to 'builtin/repack.c')
-rw-r--r--builtin/repack.c210
1 files changed, 158 insertions, 52 deletions
diff --git a/builtin/repack.c b/builtin/repack.c
index 6c636e159e..0223f2880c 100644
--- a/builtin/repack.c
+++ b/builtin/repack.c
@@ -8,10 +8,14 @@
#include "strbuf.h"
#include "string-list.h"
#include "argv-array.h"
+#include "midx.h"
+#include "packfile.h"
+#include "object-store.h"
static int delta_base_offset = 1;
static int pack_kept_objects = -1;
static int write_bitmaps;
+static int use_delta_islands;
static char *packdir, *packtmp;
static const char *const git_repack_usage[] = {
@@ -40,6 +44,10 @@ static int repack_config(const char *var, const char *value, void *cb)
write_bitmaps = git_config_bool(var, value);
return 0;
}
+ if (!strcmp(var, "repack.usedeltaislands")) {
+ use_delta_islands = git_config_bool(var, value);
+ return 0;
+ }
return git_default_config(var, value, cb);
}
@@ -83,7 +91,7 @@ static void remove_pack_on_signal(int signo)
/*
* Adds all packs hex strings to the fname list, which do not
- * have a corresponding .keep or .promisor file. These packs are not to
+ * have a corresponding .keep file. These packs are not to
* be kept if we are going to pack everything into one file.
*/
static void get_non_kept_pack_filenames(struct string_list *fname_list,
@@ -111,8 +119,7 @@ static void get_non_kept_pack_filenames(struct string_list *fname_list,
fname = xmemdupz(e->d_name, len);
- if (!file_exists(mkpath("%s/%s.keep", packdir, fname)) &&
- !file_exists(mkpath("%s/%s.promisor", packdir, fname)))
+ if (!file_exists(mkpath("%s/%s.keep", packdir, fname)))
string_list_append_nodup(fname_list, fname);
else
free(fname);
@@ -122,7 +129,7 @@ static void get_non_kept_pack_filenames(struct string_list *fname_list,
static void remove_redundant_pack(const char *dir_name, const char *base_name)
{
- const char *exts[] = {".pack", ".idx", ".keep", ".bitmap"};
+ const char *exts[] = {".pack", ".idx", ".keep", ".bitmap", ".promisor"};
int i;
struct strbuf buf = STRBUF_INIT;
size_t plen;
@@ -138,6 +145,117 @@ static void remove_redundant_pack(const char *dir_name, const char *base_name)
strbuf_release(&buf);
}
+struct pack_objects_args {
+ const char *window;
+ const char *window_memory;
+ const char *depth;
+ const char *threads;
+ const char *max_pack_size;
+ int no_reuse_delta;
+ int no_reuse_object;
+ int quiet;
+ int local;
+};
+
+static void prepare_pack_objects(struct child_process *cmd,
+ const struct pack_objects_args *args)
+{
+ argv_array_push(&cmd->args, "pack-objects");
+ if (args->window)
+ argv_array_pushf(&cmd->args, "--window=%s", args->window);
+ if (args->window_memory)
+ argv_array_pushf(&cmd->args, "--window-memory=%s", args->window_memory);
+ if (args->depth)
+ argv_array_pushf(&cmd->args, "--depth=%s", args->depth);
+ if (args->threads)
+ argv_array_pushf(&cmd->args, "--threads=%s", args->threads);
+ if (args->max_pack_size)
+ argv_array_pushf(&cmd->args, "--max-pack-size=%s", args->max_pack_size);
+ if (args->no_reuse_delta)
+ argv_array_pushf(&cmd->args, "--no-reuse-delta");
+ if (args->no_reuse_object)
+ argv_array_pushf(&cmd->args, "--no-reuse-object");
+ if (args->local)
+ argv_array_push(&cmd->args, "--local");
+ if (args->quiet)
+ argv_array_push(&cmd->args, "--quiet");
+ if (delta_base_offset)
+ argv_array_push(&cmd->args, "--delta-base-offset");
+ argv_array_push(&cmd->args, packtmp);
+ cmd->git_cmd = 1;
+ cmd->out = -1;
+}
+
+/*
+ * Write oid to the given struct child_process's stdin, starting it first if
+ * necessary.
+ */
+static int write_oid(const struct object_id *oid, struct packed_git *pack,
+ uint32_t pos, void *data)
+{
+ struct child_process *cmd = data;
+
+ if (cmd->in == -1) {
+ if (start_command(cmd))
+ die("Could not start pack-objects to repack promisor objects");
+ }
+
+ xwrite(cmd->in, oid_to_hex(oid), GIT_SHA1_HEXSZ);
+ xwrite(cmd->in, "\n", 1);
+ return 0;
+}
+
+static void repack_promisor_objects(const struct pack_objects_args *args,
+ struct string_list *names)
+{
+ struct child_process cmd = CHILD_PROCESS_INIT;
+ FILE *out;
+ struct strbuf line = STRBUF_INIT;
+
+ prepare_pack_objects(&cmd, args);
+ cmd.in = -1;
+
+ /*
+ * NEEDSWORK: Giving pack-objects only the OIDs without any ordering
+ * hints may result in suboptimal deltas in the resulting pack. See if
+ * the OIDs can be sent with fake paths such that pack-objects can use a
+ * {type -> existing pack order} ordering when computing deltas instead
+ * of a {type -> size} ordering, which may produce better deltas.
+ */
+ for_each_packed_object(write_oid, &cmd,
+ FOR_EACH_OBJECT_PROMISOR_ONLY);
+
+ if (cmd.in == -1)
+ /* No packed objects; cmd was never started */
+ return;
+
+ close(cmd.in);
+
+ out = xfdopen(cmd.out, "r");
+ while (strbuf_getline_lf(&line, out) != EOF) {
+ char *promisor_name;
+ int fd;
+ if (line.len != the_hash_algo->hexsz)
+ die("repack: Expecting full hex object ID lines only from pack-objects.");
+ string_list_append(names, line.buf);
+
+ /*
+ * pack-objects creates the .pack and .idx files, but not the
+ * .promisor file. Create the .promisor file, which is empty.
+ */
+ promisor_name = mkpathdup("%s-%s.promisor", packtmp,
+ line.buf);
+ fd = open(promisor_name, O_CREAT|O_EXCL|O_WRONLY, 0600);
+ if (fd < 0)
+ die_errno("unable to create '%s'", promisor_name);
+ close(fd);
+ free(promisor_name);
+ }
+ fclose(out);
+ if (finish_command(&cmd))
+ die("Could not finish pack-objects to repack promisor objects");
+}
+
#define ALL_INTO_ONE 1
#define LOOSEN_UNREACHABLE 2
@@ -150,6 +268,7 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
{".pack"},
{".idx"},
{".bitmap", 1},
+ {".promisor", 1},
};
struct child_process cmd = CHILD_PROCESS_INIT;
struct string_list_item *item;
@@ -165,15 +284,10 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
int delete_redundant = 0;
const char *unpack_unreachable = NULL;
int keep_unreachable = 0;
- const char *window = NULL, *window_memory = NULL;
- const char *depth = NULL;
- const char *threads = NULL;
- const char *max_pack_size = NULL;
struct string_list keep_pack_list = STRING_LIST_INIT_NODUP;
- int no_reuse_delta = 0, no_reuse_object = 0;
int no_update_server_info = 0;
- int quiet = 0;
- int local = 0;
+ int midx_cleared = 0;
+ struct pack_objects_args po_args = {NULL};
struct option builtin_repack_options[] = {
OPT_BIT('a', NULL, &pack_everything,
@@ -183,30 +297,32 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
LOOSEN_UNREACHABLE | ALL_INTO_ONE),
OPT_BOOL('d', NULL, &delete_redundant,
N_("remove redundant packs, and run git-prune-packed")),
- OPT_BOOL('f', NULL, &no_reuse_delta,
+ OPT_BOOL('f', NULL, &po_args.no_reuse_delta,
N_("pass --no-reuse-delta to git-pack-objects")),
- OPT_BOOL('F', NULL, &no_reuse_object,
+ OPT_BOOL('F', NULL, &po_args.no_reuse_object,
N_("pass --no-reuse-object to git-pack-objects")),
OPT_BOOL('n', NULL, &no_update_server_info,
N_("do not run git-update-server-info")),
- OPT__QUIET(&quiet, N_("be quiet")),
- OPT_BOOL('l', "local", &local,
+ OPT__QUIET(&po_args.quiet, N_("be quiet")),
+ OPT_BOOL('l', "local", &po_args.local,
N_("pass --local to git-pack-objects")),
OPT_BOOL('b', "write-bitmap-index", &write_bitmaps,
N_("write bitmap index")),
+ OPT_BOOL('i', "delta-islands", &use_delta_islands,
+ N_("pass --delta-islands to git-pack-objects")),
OPT_STRING(0, "unpack-unreachable", &unpack_unreachable, N_("approxidate"),
N_("with -A, do not loosen objects older than this")),
OPT_BOOL('k', "keep-unreachable", &keep_unreachable,
N_("with -a, repack unreachable objects")),
- OPT_STRING(0, "window", &window, N_("n"),
+ OPT_STRING(0, "window", &po_args.window, N_("n"),
N_("size of the window used for delta compression")),
- OPT_STRING(0, "window-memory", &window_memory, N_("bytes"),
+ OPT_STRING(0, "window-memory", &po_args.window_memory, N_("bytes"),
N_("same as the above, but limit memory size instead of entries count")),
- OPT_STRING(0, "depth", &depth, N_("n"),
+ OPT_STRING(0, "depth", &po_args.depth, N_("n"),
N_("limits the maximum delta depth")),
- OPT_STRING(0, "threads", &threads, N_("n"),
+ OPT_STRING(0, "threads", &po_args.threads, N_("n"),
N_("limits the maximum number of threads")),
- OPT_STRING(0, "max-pack-size", &max_pack_size, N_("bytes"),
+ OPT_STRING(0, "max-pack-size", &po_args.max_pack_size, N_("bytes"),
N_("maximum size of each packfile")),
OPT_BOOL(0, "pack-kept-objects", &pack_kept_objects,
N_("repack objects in packs marked with .keep")),
@@ -238,7 +354,8 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
sigchain_push_common(remove_pack_on_signal);
- argv_array_push(&cmd.args, "pack-objects");
+ prepare_pack_objects(&cmd, &po_args);
+
argv_array_push(&cmd.args, "--keep-true-parents");
if (!pack_kept_objects)
argv_array_push(&cmd.args, "--honor-pack-keep");
@@ -251,26 +368,16 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
argv_array_push(&cmd.args, "--indexed-objects");
if (repository_format_partial_clone)
argv_array_push(&cmd.args, "--exclude-promisor-objects");
- if (window)
- argv_array_pushf(&cmd.args, "--window=%s", window);
- if (window_memory)
- argv_array_pushf(&cmd.args, "--window-memory=%s", window_memory);
- if (depth)
- argv_array_pushf(&cmd.args, "--depth=%s", depth);
- if (threads)
- argv_array_pushf(&cmd.args, "--threads=%s", threads);
- if (max_pack_size)
- argv_array_pushf(&cmd.args, "--max-pack-size=%s", max_pack_size);
- if (no_reuse_delta)
- argv_array_pushf(&cmd.args, "--no-reuse-delta");
- if (no_reuse_object)
- argv_array_pushf(&cmd.args, "--no-reuse-object");
if (write_bitmaps)
argv_array_push(&cmd.args, "--write-bitmap-index");
+ if (use_delta_islands)
+ argv_array_push(&cmd.args, "--delta-islands");
if (pack_everything & ALL_INTO_ONE) {
get_non_kept_pack_filenames(&existing_packs, &keep_pack_list);
+ repack_promisor_objects(&po_args, &names);
+
if (existing_packs.nr && delete_redundant) {
if (unpack_unreachable) {
argv_array_pushf(&cmd.args,
@@ -292,17 +399,6 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
argv_array_push(&cmd.args, "--incremental");
}
- if (local)
- argv_array_push(&cmd.args, "--local");
- if (quiet)
- argv_array_push(&cmd.args, "--quiet");
- if (delta_base_offset)
- argv_array_push(&cmd.args, "--delta-base-offset");
-
- argv_array_push(&cmd.args, packtmp);
-
- cmd.git_cmd = 1;
- cmd.out = -1;
cmd.no_stdin = 1;
ret = start_command(&cmd);
@@ -311,8 +407,8 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
out = xfdopen(cmd.out, "r");
while (strbuf_getline_lf(&line, out) != EOF) {
- if (line.len != 40)
- die("repack: Expecting 40 character sha1 lines only from pack-objects.");
+ if (line.len != the_hash_algo->hexsz)
+ die("repack: Expecting full hex object ID lines only from pack-objects.");
string_list_append(&names, line.buf);
}
fclose(out);
@@ -320,7 +416,7 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
if (ret)
return ret;
- if (!names.nr && !quiet)
+ if (!names.nr && !po_args.quiet)
printf("Nothing new to pack.\n");
/*
@@ -333,6 +429,13 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
for_each_string_list_item(item, &names) {
for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
char *fname, *fname_old;
+
+ if (!midx_cleared) {
+ /* if we move a packfile, it will invalidated the midx */
+ clear_midx_file(get_object_directory());
+ midx_cleared = 1;
+ }
+
fname = mkpathdup("%s/pack-%s%s", packdir,
item->string, exts[ext].name);
if (!file_exists(fname)) {
@@ -429,19 +532,22 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
/* End of pack replacement. */
+ reprepare_packed_git(the_repository);
+
if (delete_redundant) {
+ const int hexsz = the_hash_algo->hexsz;
int opts = 0;
string_list_sort(&names);
for_each_string_list_item(item, &existing_packs) {
char *sha1;
size_t len = strlen(item->string);
- if (len < 40)
+ if (len < hexsz)
continue;
- sha1 = item->string + len - 40;
+ sha1 = item->string + len - hexsz;
if (!string_list_has_string(&names, sha1))
remove_redundant_pack(packdir, item->string);
}
- if (!quiet && isatty(2))
+ if (!po_args.quiet && isatty(2))
opts |= PRUNE_PACKED_VERBOSE;
prune_packed_objects(opts);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 07:51:39 +0000