aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorJunio C Hamano <junkio@cox.net>2005-09-14 13:08:55 -0700
committerJunio C Hamano <junkio@cox.net>2005-09-15 12:46:31 -0700
commit0f56479d7325083953be36b8c8ee90380ff27f92 (patch)
tree6fcc320ce76ff96dab81dad33ea4e1f97dfd8194
parent53764ee43defda7109fe547f471eac54c4e8b3d6 (diff)
downloadgit-0f56479d7325083953be36b8c8ee90380ff27f92.tar.gz
git-0f56479d7325083953be36b8c8ee90380ff27f92.tar.xz
Retire info/rev-cache
It was one of those things that were well intentioned but did not turn out to be useful in practice. Signed-off-by: Junio C Hamano <junkio@cox.net>
-rw-r--r--.gitignore2
-rw-r--r--Documentation/git-build-rev-cache.txt38
-rw-r--r--Documentation/git-show-rev-cache.txt37
-rw-r--r--Documentation/git-update-server-info.txt2
-rw-r--r--Documentation/git.txt6
-rw-r--r--Documentation/repository-layout.txt7
-rw-r--r--Makefile8
-rw-r--r--build-rev-cache.c56
-rw-r--r--rev-cache.c318
-rw-r--r--rev-cache.h29
-rw-r--r--server-info.c41
-rw-r--r--show-rev-cache.c18
12 files changed, 4 insertions, 558 deletions
diff --git a/.gitignore b/.gitignore
index 31c03f468..9fde27fb4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,7 +6,6 @@ git-applypatch
git-archimport
git-bisect
git-branch
-git-build-rev-cache
git-cat-file
git-checkout
git-checkout-index
@@ -78,7 +77,6 @@ git-sh-setup
git-shortlog
git-show-branch
git-show-index
-git-show-rev-cache
git-ssh-fetch
git-ssh-upload
git-status
diff --git a/Documentation/git-build-rev-cache.txt b/Documentation/git-build-rev-cache.txt
deleted file mode 100644
index 1dbad7763..000000000
--- a/Documentation/git-build-rev-cache.txt
+++ /dev/null
@@ -1,38 +0,0 @@
-git-build-rev-cache(1)
-======================
-
-NAME
-----
-git-build-rev-cache - Create or update a rev-cache file.
-
-SYNOPSIS
---------
-'git-build-rev-cache' [-v] <rev-cache-file> < list-of-heads
-
-DESCRIPTION
------------
-Creates or updates a file that describes the commit ancestry reachable
-from the list-of-head read from stdin. This file is in an append-only
-binary format to make the server side friendly to rsync mirroring
-scheme, and can be read by the git-show-rev-cache command.
-
-OPTIONS
--------
--v::
- Verbose.
-
-<rev-cache-file>::
- The rev-cache to operate on.
-
-Author
-------
-Written by Junio C Hamano <junkio@cox.net>
-
-Documentation
---------------
-Documentation by Junio C Hamano and the git-list <git@vger.kernel.org>.
-
-GIT
----
-Part of the link:git.html[git] suite
-
diff --git a/Documentation/git-show-rev-cache.txt b/Documentation/git-show-rev-cache.txt
deleted file mode 100644
index 104ecb7b0..000000000
--- a/Documentation/git-show-rev-cache.txt
+++ /dev/null
@@ -1,37 +0,0 @@
-git-show-rev-cache(1)
-=====================
-
-NAME
-----
-git-show-rev-cache - Show the contents of a rev-cache file.
-
-SYNOPSIS
---------
-'git-show-rev-cache' <rev-cache-file>
-
-DESCRIPTION
------------
-Show the contents of <rev-cache-file>.
-
-A rev-cache file describes the commit ancestry reachable from references
-supplied as input to get-build-rev-cache. This file is in an
-append-only binary format to make the server side friendly to rsync
-mirroring scheme.
-
-OPTIONS
--------
-<rev-cache-file>::
- Rev-cache file to display.
-
-Author
-------
-Written by Junio C Hamano <junkio@cox.net>
-
-Documentation
---------------
-Documentation by Junio C Hamano and the git-list <git@vger.kernel.org>.
-
-GIT
----
-Part of the link:git.html[git] suite
-
diff --git a/Documentation/git-update-server-info.txt b/Documentation/git-update-server-info.txt
index 74c4364ad..39222c3b4 100644
--- a/Documentation/git-update-server-info.txt
+++ b/Documentation/git-update-server-info.txt
@@ -38,8 +38,6 @@ of what they are for:
* info/refs
-* info/rev-cache
-
BUGS
----
diff --git a/Documentation/git.txt b/Documentation/git.txt
index 31dd4749e..bec562e30 100644
--- a/Documentation/git.txt
+++ b/Documentation/git.txt
@@ -359,9 +359,6 @@ link:git-tag.html[git-tag]::
Interrogators:
-link:git-build-rev-cache.html[git-build-rev-cache]::
- Create or update a rev-cache file.
-
link:git-cherry.html[git-cherry]::
Find commits not merged upstream.
@@ -402,9 +399,6 @@ link:git-send-email.html[git-send-email]::
Send patch e-mails out of "format-patch --mbox" output.
Previously this command was known as git-send-email-script.
-link:git-show-rev-cache.html[git-show-rev-cache]::
- Show the contents of a rev-cache file.
-
link:git-stripspace.html[git-stripspace]::
Filter out empty lines.
diff --git a/Documentation/repository-layout.txt b/Documentation/repository-layout.txt
index 499b07059..d20fa80d8 100644
--- a/Documentation/repository-layout.txt
+++ b/Documentation/repository-layout.txt
@@ -117,13 +117,6 @@ info/grafts::
listing their 40-byte hexadecimal object names separated
by a space and terminated by a newline.
-info/rev-cache::
- No higher-level tool currently takes advantage of this
- file, but it is generated when `git update-server-info`
- is run. It records the commit ancestry information of
- the commits in this repository in a concise binary
- format, and can be read with `git-show-rev-cache`.
-
info/exclude::
This file, by convention among Porcelains, stores the
exclude pattern list. `git status` looks at it, but
diff --git a/Makefile b/Makefile
index 88189fb12..e8421ccc2 100644
--- a/Makefile
+++ b/Makefile
@@ -92,7 +92,7 @@ SIMPLE_PROGRAMS = \
# ... and all the rest
PROGRAMS = \
- git-apply git-build-rev-cache git-cat-file \
+ git-apply git-cat-file \
git-checkout-index git-clone-pack git-commit-tree \
git-convert-objects git-diff-files \
git-diff-helper git-diff-index git-diff-stages \
@@ -103,7 +103,7 @@ PROGRAMS = \
git-peek-remote git-prune-packed git-read-tree \
git-receive-pack git-rev-list git-rev-parse \
git-rev-tree git-send-pack git-show-branch \
- git-show-index git-show-rev-cache git-ssh-fetch \
+ git-show-index git-ssh-fetch \
git-ssh-upload git-tar-tree git-unpack-file \
git-unpack-objects git-update-index git-update-server-info \
git-upload-pack git-verify-pack git-write-tree \
@@ -125,7 +125,7 @@ LIB_FILE=libgit.a
LIB_H = \
blob.h cache.h commit.h count-delta.h csum-file.h delta.h \
diff.h epoch.h object.h pack.h pkt-line.h quote.h refs.h \
- rev-cache.h run-command.h strbuf.h tag.h tree.h
+ run-command.h strbuf.h tag.h tree.h
DIFF_OBJS = \
diff.o diffcore-break.o diffcore-order.o diffcore-pathspec.o \
@@ -135,7 +135,7 @@ LIB_OBJS = \
blob.o commit.o connect.o count-delta.o csum-file.o \
date.o diff-delta.o entry.o ident.o index.o \
object.o pack-check.o patch-delta.o path.o pkt-line.o \
- quote.o read-cache.o refs.o rev-cache.o run-command.o \
+ quote.o read-cache.o refs.o run-command.o \
server-info.o setup.o sha1_file.o sha1_name.o strbuf.o \
tag.o tree.o usage.o $(DIFF_OBJS)
diff --git a/build-rev-cache.c b/build-rev-cache.c
deleted file mode 100644
index 948898beb..000000000
--- a/build-rev-cache.c
+++ /dev/null
@@ -1,56 +0,0 @@
-#include "refs.h"
-#include "cache.h"
-#include "commit.h"
-#include "rev-cache.h"
-
-static void process_head_list(int verbose)
-{
- char buf[512];
-
- while (fgets(buf, sizeof(buf), stdin)) {
- unsigned char sha1[20];
- struct commit *commit;
-
- if (get_sha1_hex(buf, sha1)) {
- error("ignoring: %s", buf);
- continue;
- }
- if (!(commit = lookup_commit_reference(sha1))) {
- error("not a commit: %s", sha1_to_hex(sha1));
- continue;
- }
- record_rev_cache(commit->object.sha1, verbose ? stderr : NULL);
- }
-}
-
-
-static const char *build_rev_cache_usage =
-"git-build-rev-cache <rev-cache-file> < list-of-heads";
-
-int main(int ac, char **av)
-{
- int verbose = 0;
- const char *path;
-
- while (1 < ac && av[1][0] == '-') {
- if (!strcmp(av[1], "-v"))
- verbose = 1;
- else
- usage(build_rev_cache_usage);
- ac--; av++;
- }
-
- if (ac != 2)
- usage(build_rev_cache_usage);
-
- path = av[1];
-
- /* read existing rev-cache */
- read_rev_cache(path, NULL, 0);
-
- process_head_list(verbose);
-
- /* update the rev-cache database by appending newly found one to it */
- write_rev_cache(path, path);
- return 0;
-}
diff --git a/rev-cache.c b/rev-cache.c
deleted file mode 100644
index 6344d6224..000000000
--- a/rev-cache.c
+++ /dev/null
@@ -1,318 +0,0 @@
-#include "refs.h"
-#include "cache.h"
-#include "rev-cache.h"
-
-struct rev_cache **rev_cache;
-int nr_revs, alloc_revs;
-
-static struct rev_list_elem *rle_free;
-
-#define BATCH_SIZE 512
-
-int find_rev_cache(const unsigned char *sha1)
-{
- int lo = 0, hi = nr_revs;
- while (lo < hi) {
- int mi = (lo + hi) / 2;
- struct rev_cache *ri = rev_cache[mi];
- int cmp = memcmp(sha1, ri->sha1, 20);
- if (!cmp)
- return mi;
- if (cmp < 0)
- hi = mi;
- else
- lo = mi + 1;
- }
- return -lo - 1;
-}
-
-static struct rev_list_elem *alloc_list_elem(void)
-{
- struct rev_list_elem *rle;
- if (!rle_free) {
- int i;
-
- rle = xmalloc(sizeof(*rle) * BATCH_SIZE);
- for (i = 0; i < BATCH_SIZE - 1; i++) {
- rle[i].ri = NULL;
- rle[i].next = &rle[i + 1];
- }
- rle[BATCH_SIZE - 1].ri = NULL;
- rle[BATCH_SIZE - 1].next = NULL;
- rle_free = rle;
- }
- rle = rle_free;
- rle_free = rle->next;
- return rle;
-}
-
-static struct rev_cache *create_rev_cache(const unsigned char *sha1)
-{
- struct rev_cache *ri;
- int pos = find_rev_cache(sha1);
-
- if (0 <= pos)
- return rev_cache[pos];
- pos = -pos - 1;
- if (alloc_revs <= ++nr_revs) {
- alloc_revs = alloc_nr(alloc_revs);
- rev_cache = xrealloc(rev_cache, sizeof(ri) * alloc_revs);
- }
- if (pos < nr_revs)
- memmove(rev_cache + pos + 1, rev_cache + pos,
- (nr_revs - pos - 1) * sizeof(ri));
- ri = xcalloc(1, sizeof(*ri));
- memcpy(ri->sha1, sha1, 20);
- rev_cache[pos] = ri;
- return ri;
-}
-
-static unsigned char last_sha1[20];
-
-static void write_one_rev_cache(FILE *rev_cache_file, struct rev_cache *ri)
-{
- unsigned char flag;
- struct rev_list_elem *rle;
-
- if (ri->written)
- return;
-
- if (ri->parsed) {
- /* We use last_sha1 compression only for the first parent;
- * otherwise the resulting rev-cache would lose the parent
- * order information.
- */
- if (ri->parents &&
- !memcmp(ri->parents->ri->sha1, last_sha1, 20))
- flag = (ri->num_parents - 1) | 0x80;
- else
- flag = ri->num_parents;
-
- fwrite(ri->sha1, 20, 1, rev_cache_file);
- fwrite(&flag, 1, 1, rev_cache_file);
- for (rle = ri->parents; rle; rle = rle->next) {
- if (flag & 0x80 && rle == ri->parents)
- continue;
- fwrite(rle->ri->sha1, 20, 1, rev_cache_file);
- }
- memcpy(last_sha1, ri->sha1, 20);
- ri->written = 1;
- }
- /* recursively write children depth first */
- for (rle = ri->children; rle; rle = rle->next)
- write_one_rev_cache(rev_cache_file, rle->ri);
-}
-
-void write_rev_cache(const char *newpath, const char *oldpath)
-{
- /* write the following commit ancestry information in
- * $GIT_DIR/info/rev-cache.
- *
- * The format is:
- * 20-byte SHA1 (commit ID)
- * 1-byte flag:
- * - bit 0-6 records "number of parent commit SHA1s to
- * follow" (i.e. up to 127 children can be listed).
- * - when the bit 7 is on, then "the entry immediately
- * before this entry is one of the parents of this
- * commit".
- * N x 20-byte SHA1 (parent commit IDs)
- */
- FILE *rev_cache_file;
- int i;
- struct rev_cache *ri;
-
- if (!strcmp(newpath, oldpath)) {
- /* If we are doing it in place */
- rev_cache_file = fopen(newpath, "a");
- }
- else {
- char buf[8096];
- size_t sz;
- FILE *oldfp = fopen(oldpath, "r");
- rev_cache_file = fopen(newpath, "w");
- if (oldfp) {
- while (1) {
- sz = fread(buf, 1, sizeof(buf), oldfp);
- if (sz == 0)
- break;
- fwrite(buf, 1, sz, rev_cache_file);
- }
- fclose(oldfp);
- }
- }
-
- memset(last_sha1, 0, 20);
-
- /* Go through available rev_cache structures, starting from
- * parentless ones first, so that we would get most out of
- * last_sha1 optimization by the depth first behaviour of
- * write_one_rev_cache().
- */
- for (i = 0; i < nr_revs; i++) {
- ri = rev_cache[i];
- if (ri->num_parents)
- continue;
- write_one_rev_cache(rev_cache_file, ri);
- }
- /* Then the rest */
- for (i = 0; i < nr_revs; i++) {
- ri = rev_cache[i];
- write_one_rev_cache(rev_cache_file, ri);
- }
- fclose(rev_cache_file);
-}
-
-static void add_parent(struct rev_cache *child,
- const unsigned char *parent_sha1)
-{
- struct rev_cache *parent = create_rev_cache(parent_sha1);
- struct rev_list_elem *e = alloc_list_elem();
-
- /* Keep the parent list ordered in the same way the commit
- * object records them.
- */
- e->ri = parent;
- e->next = NULL;
- if (!child->parents_tail)
- child->parents = e;
- else
- child->parents_tail->next = e;
- child->parents_tail = e;
- child->num_parents++;
-
- /* There is no inherent order of the children so we just
- * LIFO them together.
- */
- e = alloc_list_elem();
- e->next = parent->children;
- parent->children = e;
- e->ri = child;
- parent->num_children++;
-}
-
-int read_rev_cache(const char *path, FILE *dumpfile, int dry_run)
-{
- unsigned char *map;
- int fd;
- struct stat st;
- unsigned long ofs, len;
- struct rev_cache *ri = NULL;
-
- fd = open(path, O_RDONLY);
- if (fd < 0) {
- if (dry_run)
- return error("cannot open %s", path);
- if (errno == ENOENT)
- return 0;
- return -1;
- }
- if (fstat(fd, &st)) {
- close(fd);
- return -1;
- }
- map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
- close(fd);
- if (map == MAP_FAILED)
- return -1;
-
- memset(last_sha1, 0, 20);
- ofs = 0;
- len = st.st_size;
- while (ofs < len) {
- unsigned char sha1[20];
- int flag, cnt, i;
- if (len < ofs + 21)
- die("rev-cache too short");
- memcpy(sha1, map + ofs, 20);
- flag = map[ofs + 20];
- ofs += 21;
- cnt = (flag & 0x7f) + ((flag & 0x80) != 0);
- if (len < ofs + (flag & 0x7f) * 20)
- die("rev-cache too short to have %d more parents",
- (flag & 0x7f));
- if (dumpfile)
- fprintf(dumpfile, "%s", sha1_to_hex(sha1));
- if (!dry_run) {
- ri = create_rev_cache(sha1);
- if (!ri)
- die("cannot create rev-cache for %s",
- sha1_to_hex(sha1));
- ri->written = ri->parsed = 1;
- }
- i = 0;
- if (flag & 0x80) {
- if (!dry_run)
- add_parent(ri, last_sha1);
- if (dumpfile)
- fprintf(dumpfile, " %s",
- sha1_to_hex(last_sha1));
- i++;
- }
- while (i++ < cnt) {
- if (!dry_run)
- add_parent(ri, map + ofs);
- if (dumpfile)
- fprintf(dumpfile, " %s",
- sha1_to_hex(last_sha1));
- ofs += 20;
- }
- if (dumpfile)
- fprintf(dumpfile, "\n");
- memcpy(last_sha1, sha1, 20);
- }
- if (ofs != len)
- die("rev-cache truncated?");
- munmap(map, len);
- return 0;
-}
-
-int record_rev_cache(const unsigned char *sha1, FILE *dumpfile)
-{
- unsigned char parent[20];
- char type[20];
- unsigned long size, ofs;
- unsigned int cnt, i;
- void *buf;
- struct rev_cache *ri;
-
- buf = read_sha1_file(sha1, type, &size);
- if (!buf)
- return error("%s: not found", sha1_to_hex(sha1));
- if (strcmp(type, "commit")) {
- free(buf);
- return error("%s: not a commit but a %s",
- sha1_to_hex(sha1), type);
- }
- ri = create_rev_cache(sha1);
- if (ri->parsed)
- return 0;
- if (dumpfile)
- fprintf(dumpfile, "commit %s\n", sha1_to_hex(sha1));
-
- cnt = 0;
- ofs = 46; /* "tree " + hex-sha1 + "\n" */
- while (!memcmp(buf + ofs, "parent ", 7) &&
- !get_sha1_hex(buf + ofs + 7, parent)) {
- ofs += 48;
- cnt++;
- }
- if (cnt * 48 + 46 != ofs) {
- free(buf);
- die("internal error in record_rev_cache");
- }
-
- ri = create_rev_cache(sha1);
- ri->parsed = 1;
-
- for (i = 0; i < cnt; i++) {
- unsigned char parent_sha1[20];
-
- ofs = 46 + i * 48 + 7;
- get_sha1_hex(buf + ofs, parent_sha1);
- add_parent(ri, parent_sha1);
- record_rev_cache(parent_sha1, dumpfile);
- }
- free(buf);
- return 0;
-}
diff --git a/rev-cache.h b/rev-cache.h
deleted file mode 100644
index b238ac640..000000000
--- a/rev-cache.h
+++ /dev/null
@@ -1,29 +0,0 @@
-#ifndef REV_CACHE_H
-#define REV_CACHE_H
-
-extern struct rev_cache {
- struct rev_cache *head_list;
- struct rev_list_elem *children;
- struct rev_list_elem *parents;
- struct rev_list_elem *parents_tail;
- unsigned short num_parents;
- unsigned short num_children;
- unsigned int written : 1;
- unsigned int parsed : 1;
- unsigned int work : 30;
- void *work_ptr;
- unsigned char sha1[20];
-} **rev_cache;
-extern int nr_revs, alloc_revs;
-
-struct rev_list_elem {
- struct rev_list_elem *next;
- struct rev_cache *ri;
-};
-
-extern int find_rev_cache(const unsigned char *);
-extern int read_rev_cache(const char *, FILE *, int);
-extern int record_rev_cache(const unsigned char *, FILE *);
-extern void write_rev_cache(const char *new, const char *old);
-
-#endif
diff --git a/server-info.c b/server-info.c
index 2b3aecab4..3263035b9 100644
--- a/server-info.c
+++ b/server-info.c
@@ -3,7 +3,6 @@
#include "object.h"
#include "commit.h"
#include "tag.h"
-#include "rev-cache.h"
/* refs */
static FILE *info_ref_fp;
@@ -516,45 +515,6 @@ static int update_info_packs(int force)
return 0;
}
-/* rev-cache */
-static int record_rev_cache_ref(const char *path, const unsigned char *sha1)
-{
- struct object *obj = parse_object(sha1);
-
- if (!obj)
- return error("ref %s has bad sha %s", path, sha1_to_hex(sha1));
- while (obj && obj->type == tag_type)
- obj = parse_object(((struct tag *)obj)->tagged->sha1);
- if (!obj || obj->type != commit_type)
- /* tag pointing at a non-commit */
- return 0;
- return record_rev_cache(obj->sha1, NULL);
-}
-
-static int update_info_revs(int force)
-{
- char *path0 = strdup(git_path("info/rev-cache"));
- int len = strlen(path0);
- char *path1 = xmalloc(len + 2);
-
- strcpy(path1, path0);
- strcpy(path1 + len, "+");
-
- /* read existing rev-cache */
- if (!force)
- read_rev_cache(path0, NULL, 0);
- safe_create_leading_directories(path0);
-
- for_each_ref(record_rev_cache_ref);
-
- /* update the rev-cache database */
- write_rev_cache(path1, force ? "/dev/null" : path0);
- rename(path1, path0);
- free(path1);
- free(path0);
- return 0;
-}
-
/* public */
int update_server_info(int force)
{
@@ -566,7 +526,6 @@ int update_server_info(int force)
errs = errs | update_info_refs(force);
errs = errs | update_info_packs(force);
- errs = errs | update_info_revs(force);
return errs;
}
diff --git a/show-rev-cache.c b/show-rev-cache.c
deleted file mode 100644
index fa92b87ab..000000000
--- a/show-rev-cache.c
+++ /dev/null
@@ -1,18 +0,0 @@
-#include "cache.h"
-#include "rev-cache.h"
-
-static char *show_rev_cache_usage =
-"git-show-rev-cache <rev-cache-file>";
-
-int main(int ac, char **av)
-{
- while (1 < ac && av[0][1] == '-') {
- /* do flags here */
- break;
- ac--; av++;
- }
- if (ac != 2)
- usage(show_rev_cache_usage);
-
- return read_rev_cache(av[1], stdout, 1);
-}