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-rw-r--r--.gitignore1
-rw-r--r--Documentation/git-replace.txt71
-rw-r--r--Makefile2
-rw-r--r--builtin-fsck.c1
-rw-r--r--builtin-pack-objects.c2
-rw-r--r--builtin-prune.c1
-rw-r--r--builtin-replace.c159
-rw-r--r--builtin-unpack-objects.c2
-rw-r--r--builtin.h1
-rw-r--r--cache.h7
-rw-r--r--commit.h2
-rw-r--r--environment.c1
-rw-r--r--git.c1
-rw-r--r--mktag.c7
-rw-r--r--object.c9
-rw-r--r--parse-options.c8
-rw-r--r--parse-options.h4
-rw-r--r--refs.c5
-rw-r--r--refs.h1
-rw-r--r--replace_object.c114
-rw-r--r--sha1_file.c23
-rwxr-xr-xt/t6050-replace.sh200
-rw-r--r--upload-pack.c1
23 files changed, 610 insertions, 13 deletions
diff --git a/.gitignore b/.gitignore
index 41c0b20..10808e3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -105,6 +105,7 @@ git-reflog
git-relink
git-remote
git-repack
+git-replace
git-repo-config
git-request-pull
git-rerere
diff --git a/Documentation/git-replace.txt b/Documentation/git-replace.txt
new file mode 100644
index 0000000..915cb77
--- /dev/null
+++ b/Documentation/git-replace.txt
@@ -0,0 +1,71 @@
+git-replace(1)
+==============
+
+NAME
+----
+git-replace - Create, list, delete refs to replace objects
+
+SYNOPSIS
+--------
+[verse]
+'git replace' [-f] <object> <replacement>
+'git replace' -d <object>...
+'git replace' -l [<pattern>]
+
+DESCRIPTION
+-----------
+Adds a 'replace' reference in `.git/refs/replace/`
+
+The name of the 'replace' reference is the SHA1 of the object that is
+replaced. The content of the replace reference is the SHA1 of the
+replacement object.
+
+Unless `-f` is given, the replace reference must not yet exist in
+`.git/refs/replace/` directory.
+
+OPTIONS
+-------
+-f::
+ If an existing replace ref for the same object exists, it will
+ be overwritten (instead of failing).
+
+-d::
+ Delete existing replace refs for the given objects.
+
+-l <pattern>::
+ List replace refs for objects that match the given pattern (or
+ all if no pattern is given).
+ Typing "git replace" without arguments, also lists all replace
+ refs.
+
+BUGS
+----
+Comparing blobs or trees that have been replaced with those that
+replace them will not work properly. And using 'git reset --hard' to
+go back to a replaced commit will move the branch to the replacement
+commit instead of the replaced commit.
+
+There may be other problems when using 'git rev-list' related to
+pending objects. And of course things may break if an object of one
+type is replaced by an object of another type (for example a blob
+replaced by a commit).
+
+SEE ALSO
+--------
+linkgit:git-tag[1]
+linkgit:git-branch[1]
+
+Author
+------
+Written by Christian Couder <chriscool@tuxfamily.org> and Junio C
+Hamano <gitster@pobox.com>, based on 'git tag' by Kristian Hogsberg
+<krh@redhat.com> and Carlos Rica <jasampler@gmail.com>.
+
+Documentation
+--------------
+Documentation by Christian Couder <chriscool@tuxfamily.org> and the
+git-list <git@vger.kernel.org>, based on 'git tag' documentation.
+
+GIT
+---
+Part of the linkgit:git[1] suite
diff --git a/Makefile b/Makefile
index e6df8ec..66eedef 100644
--- a/Makefile
+++ b/Makefile
@@ -536,6 +536,7 @@ LIB_OBJS += read-cache.o
LIB_OBJS += reflog-walk.o
LIB_OBJS += refs.o
LIB_OBJS += remote.o
+LIB_OBJS += replace_object.o
LIB_OBJS += rerere.o
LIB_OBJS += revision.o
LIB_OBJS += run-command.o
@@ -625,6 +626,7 @@ BUILTIN_OBJS += builtin-read-tree.o
BUILTIN_OBJS += builtin-receive-pack.o
BUILTIN_OBJS += builtin-reflog.o
BUILTIN_OBJS += builtin-remote.o
+BUILTIN_OBJS += builtin-replace.o
BUILTIN_OBJS += builtin-rerere.o
BUILTIN_OBJS += builtin-reset.o
BUILTIN_OBJS += builtin-rev-list.o
diff --git a/builtin-fsck.c b/builtin-fsck.c
index b3d38fa..c58b0e3 100644
--- a/builtin-fsck.c
+++ b/builtin-fsck.c
@@ -589,6 +589,7 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
struct alternate_object_database *alt;
errors_found = 0;
+ read_replace_refs = 0;
argc = parse_options(argc, argv, prefix, fsck_opts, fsck_usage, 0);
if (write_lost_and_found) {
diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c
index 9cc8a84..c433748 100644
--- a/builtin-pack-objects.c
+++ b/builtin-pack-objects.c
@@ -2098,6 +2098,8 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
int rp_ac_alloc = 64;
int rp_ac;
+ read_replace_refs = 0;
+
rp_av = xcalloc(rp_ac_alloc, sizeof(*rp_av));
rp_av[0] = "pack-objects";
diff --git a/builtin-prune.c b/builtin-prune.c
index 0ed9cce..8459aec 100644
--- a/builtin-prune.c
+++ b/builtin-prune.c
@@ -140,6 +140,7 @@ int cmd_prune(int argc, const char **argv, const char *prefix)
char *s;
save_commit_buffer = 0;
+ read_replace_refs = 0;
init_revisions(&revs, prefix);
argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
diff --git a/builtin-replace.c b/builtin-replace.c
new file mode 100644
index 0000000..fe3a647
--- /dev/null
+++ b/builtin-replace.c
@@ -0,0 +1,159 @@
+/*
+ * Builtin "git replace"
+ *
+ * Copyright (c) 2008 Christian Couder <chriscool@tuxfamily.org>
+ *
+ * Based on builtin-tag.c by Kristian Høgsberg <krh@redhat.com>
+ * and Carlos Rica <jasampler@gmail.com> that was itself based on
+ * git-tag.sh and mktag.c by Linus Torvalds.
+ */
+
+#include "cache.h"
+#include "builtin.h"
+#include "refs.h"
+#include "parse-options.h"
+
+static const char * const git_replace_usage[] = {
+ "git replace [-f] <object> <replacement>",
+ "git replace -d <object>...",
+ "git replace -l [<pattern>]",
+ NULL
+};
+
+static int show_reference(const char *refname, const unsigned char *sha1,
+ int flag, void *cb_data)
+{
+ const char *pattern = cb_data;
+
+ if (!fnmatch(pattern, refname, 0))
+ printf("%s\n", refname);
+
+ return 0;
+}
+
+static int list_replace_refs(const char *pattern)
+{
+ if (pattern == NULL)
+ pattern = "*";
+
+ for_each_replace_ref(show_reference, (void *) pattern);
+
+ return 0;
+}
+
+typedef int (*each_replace_name_fn)(const char *name, const char *ref,
+ const unsigned char *sha1);
+
+static int for_each_replace_name(const char **argv, each_replace_name_fn fn)
+{
+ const char **p;
+ char ref[PATH_MAX];
+ int had_error = 0;
+ unsigned char sha1[20];
+
+ for (p = argv; *p; p++) {
+ if (snprintf(ref, sizeof(ref), "refs/replace/%s", *p)
+ >= sizeof(ref)) {
+ error("replace ref name too long: %.*s...", 50, *p);
+ had_error = 1;
+ continue;
+ }
+ if (!resolve_ref(ref, sha1, 1, NULL)) {
+ error("replace ref '%s' not found.", *p);
+ had_error = 1;
+ continue;
+ }
+ if (fn(*p, ref, sha1))
+ had_error = 1;
+ }
+ return had_error;
+}
+
+static int delete_replace_ref(const char *name, const char *ref,
+ const unsigned char *sha1)
+{
+ if (delete_ref(ref, sha1, 0))
+ return 1;
+ printf("Deleted replace ref '%s'\n", name);
+ return 0;
+}
+
+static int replace_object(const char *object_ref, const char *replace_ref,
+ int force)
+{
+ unsigned char object[20], prev[20], repl[20];
+ char ref[PATH_MAX];
+ struct ref_lock *lock;
+
+ if (get_sha1(object_ref, object))
+ die("Failed to resolve '%s' as a valid ref.", object_ref);
+ if (get_sha1(replace_ref, repl))
+ die("Failed to resolve '%s' as a valid ref.", replace_ref);
+
+ if (snprintf(ref, sizeof(ref),
+ "refs/replace/%s",
+ sha1_to_hex(object)) > sizeof(ref) - 1)
+ die("replace ref name too long: %.*s...", 50, ref);
+ if (check_ref_format(ref))
+ die("'%s' is not a valid ref name.", ref);
+
+ if (!resolve_ref(ref, prev, 1, NULL))
+ hashclr(prev);
+ else if (!force)
+ die("replace ref '%s' already exists", ref);
+
+ lock = lock_any_ref_for_update(ref, prev, 0);
+ if (!lock)
+ die("%s: cannot lock the ref", ref);
+ if (write_ref_sha1(lock, repl, NULL) < 0)
+ die("%s: cannot update the ref", ref);
+
+ return 0;
+}
+
+int cmd_replace(int argc, const char **argv, const char *prefix)
+{
+ int list = 0, delete = 0, force = 0;
+ struct option options[] = {
+ OPT_BOOLEAN('l', NULL, &list, "list replace refs"),
+ OPT_BOOLEAN('d', NULL, &delete, "delete replace refs"),
+ OPT_BOOLEAN('f', NULL, &force, "replace the ref if it exists"),
+ OPT_END()
+ };
+
+ argc = parse_options(argc, argv, prefix, options, git_replace_usage, 0);
+
+ if (list && delete)
+ usage_msg_opt("-l and -d cannot be used together",
+ git_replace_usage, options);
+
+ if (force && (list || delete))
+ usage_msg_opt("-f cannot be used with -d or -l",
+ git_replace_usage, options);
+
+ /* Delete refs */
+ if (delete) {
+ if (argc < 1)
+ usage_msg_opt("-d needs at least one argument",
+ git_replace_usage, options);
+ return for_each_replace_name(argv, delete_replace_ref);
+ }
+
+ /* Replace object */
+ if (!list && argc) {
+ if (argc != 2)
+ usage_msg_opt("bad number of arguments",
+ git_replace_usage, options);
+ return replace_object(argv[0], argv[1], force);
+ }
+
+ /* List refs, even if "list" is not set */
+ if (argc > 1)
+ usage_msg_opt("only one pattern can be given with -l",
+ git_replace_usage, options);
+ if (force)
+ usage_msg_opt("-f needs some arguments",
+ git_replace_usage, options);
+
+ return list_replace_refs(argv[0]);
+}
diff --git a/builtin-unpack-objects.c b/builtin-unpack-objects.c
index 557148a..968fda7 100644
--- a/builtin-unpack-objects.c
+++ b/builtin-unpack-objects.c
@@ -495,6 +495,8 @@ int cmd_unpack_objects(int argc, const char **argv, const char *prefix)
int i;
unsigned char sha1[20];
+ read_replace_refs = 0;
+
git_config(git_default_config, NULL);
quiet = !isatty(2);
diff --git a/builtin.h b/builtin.h
index 9993dfc..51e4ba7 100644
--- a/builtin.h
+++ b/builtin.h
@@ -111,5 +111,6 @@ extern int cmd_write_tree(int argc, const char **argv, const char *prefix);
extern int cmd_verify_pack(int argc, const char **argv, const char *prefix);
extern int cmd_show_ref(int argc, const char **argv, const char *prefix);
extern int cmd_pack_refs(int argc, const char **argv, const char *prefix);
+extern int cmd_replace(int argc, const char **argv, const char *prefix);
#endif
diff --git a/cache.h b/cache.h
index eee717c..f793789 100644
--- a/cache.h
+++ b/cache.h
@@ -520,6 +520,7 @@ extern size_t packed_git_window_size;
extern size_t packed_git_limit;
extern size_t delta_base_cache_limit;
extern int auto_crlf;
+extern int read_replace_refs;
extern int fsync_object_files;
extern int core_preload_index;
@@ -656,7 +657,11 @@ char *strip_path_suffix(const char *path, const char *suffix);
/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
extern int sha1_object_info(const unsigned char *, unsigned long *);
-extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
+extern void *read_sha1_file_repl(const unsigned char *sha1, enum object_type *type, unsigned long *size, const unsigned char **replacement);
+static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
+{
+ return read_sha1_file_repl(sha1, type, size, NULL);
+}
extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
diff --git a/commit.h b/commit.h
index 4886544..d1674d7 100644
--- a/commit.h
+++ b/commit.h
@@ -123,6 +123,8 @@ struct commit_graft *read_graft_line(char *buf, int len);
int register_commit_graft(struct commit_graft *, int);
struct commit_graft *lookup_commit_graft(const unsigned char *sha1);
+const unsigned char *lookup_replace_object(const unsigned char *sha1);
+
extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2, int cleanup);
extern struct commit_list *get_merge_bases_many(struct commit *one, int n, struct commit **twos, int cleanup);
extern struct commit_list *get_octopus_merge_bases(struct commit_list *in);
diff --git a/environment.c b/environment.c
index 3cf88f5..5de6837 100644
--- a/environment.c
+++ b/environment.c
@@ -39,6 +39,7 @@ int pager_use_color = 1;
const char *editor_program;
const char *excludes_file;
int auto_crlf = 0; /* 1: both ways, -1: only when adding git objects */
+int read_replace_refs = 1;
enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
diff --git a/git.c b/git.c
index 4588a8b..5da6c65 100644
--- a/git.c
+++ b/git.c
@@ -339,6 +339,7 @@ static void handle_internal_command(int argc, const char **argv)
{ "receive-pack", cmd_receive_pack },
{ "reflog", cmd_reflog, RUN_SETUP },
{ "remote", cmd_remote, RUN_SETUP },
+ { "replace", cmd_replace, RUN_SETUP },
{ "repo-config", cmd_config },
{ "rerere", cmd_rerere, RUN_SETUP },
{ "reset", cmd_reset, RUN_SETUP },
diff --git a/mktag.c b/mktag.c
index a609e3e..a3b4270 100644
--- a/mktag.c
+++ b/mktag.c
@@ -19,16 +19,17 @@
/*
* We refuse to tag something we can't verify. Just because.
*/
-static int verify_object(unsigned char *sha1, const char *expected_type)
+static int verify_object(const unsigned char *sha1, const char *expected_type)
{
int ret = -1;
enum object_type type;
unsigned long size;
- void *buffer = read_sha1_file(sha1, &type, &size);
+ const unsigned char *repl;
+ void *buffer = read_sha1_file_repl(sha1, &type, &size, &repl);
if (buffer) {
if (type == type_from_string(expected_type))
- ret = check_sha1_signature(sha1, buffer, size, expected_type);
+ ret = check_sha1_signature(repl, buffer, size, expected_type);
free(buffer);
}
return ret;
diff --git a/object.c b/object.c
index a6ef439..fe8eaaf 100644
--- a/object.c
+++ b/object.c
@@ -188,17 +188,18 @@ struct object *parse_object(const unsigned char *sha1)
unsigned long size;
enum object_type type;
int eaten;
- void *buffer = read_sha1_file(sha1, &type, &size);
+ const unsigned char *repl;
+ void *buffer = read_sha1_file_repl(sha1, &type, &size, &repl);
if (buffer) {
struct object *obj;
- if (check_sha1_signature(sha1, buffer, size, typename(type)) < 0) {
+ if (check_sha1_signature(repl, buffer, size, typename(type)) < 0) {
free(buffer);
- error("sha1 mismatch %s\n", sha1_to_hex(sha1));
+ error("sha1 mismatch %s\n", sha1_to_hex(repl));
return NULL;
}
- obj = parse_object_buffer(sha1, type, size, buffer, &eaten);
+ obj = parse_object_buffer(repl, type, size, buffer, &eaten);
if (!eaten)
free(buffer);
return obj;
diff --git a/parse-options.c b/parse-options.c
index 3b71fbb..a64a4d6 100644
--- a/parse-options.c
+++ b/parse-options.c
@@ -549,6 +549,14 @@ void usage_with_options(const char * const *usagestr,
exit(129);
}
+void usage_msg_opt(const char *msg,
+ const char * const *usagestr,
+ const struct option *options)
+{
+ fprintf(stderr, "%s\n\n", msg);
+ usage_with_options(usagestr, options);
+}
+
int parse_options_usage(const char * const *usagestr,
const struct option *opts)
{
diff --git a/parse-options.h b/parse-options.h
index b32587a..f295a2c 100644
--- a/parse-options.h
+++ b/parse-options.h
@@ -145,6 +145,10 @@ extern int parse_options(int argc, const char **argv, const char *prefix,
extern NORETURN void usage_with_options(const char * const *usagestr,
const struct option *options);
+extern NORETURN void usage_msg_opt(const char *msg,
+ const char * const *usagestr,
+ const struct option *options);
+
/*----- incremental advanced APIs -----*/
enum {
diff --git a/refs.c b/refs.c
index dd9c9ba..24865cf 100644
--- a/refs.c
+++ b/refs.c
@@ -668,6 +668,11 @@ int for_each_remote_ref(each_ref_fn fn, void *cb_data)
return for_each_ref_in("refs/remotes/", fn, cb_data);
}
+int for_each_replace_ref(each_ref_fn fn, void *cb_data)
+{
+ return do_for_each_ref("refs/replace/", fn, 13, 0, cb_data);
+}
+
int for_each_rawref(each_ref_fn fn, void *cb_data)
{
return do_for_each_ref("refs/", fn, 0,
diff --git a/refs.h b/refs.h
index c11f6a6..777b5b7 100644
--- a/refs.h
+++ b/refs.h
@@ -24,6 +24,7 @@ extern int for_each_ref_in(const char *, each_ref_fn, void *);
extern int for_each_tag_ref(each_ref_fn, void *);
extern int for_each_branch_ref(each_ref_fn, void *);
extern int for_each_remote_ref(each_ref_fn, void *);
+extern int for_each_replace_ref(each_ref_fn, void *);
/* can be used to learn about broken ref and symref */
extern int for_each_rawref(each_ref_fn, void *);
diff --git a/replace_object.c b/replace_object.c
new file mode 100644
index 0000000..eb59604
--- /dev/null
+++ b/replace_object.c
@@ -0,0 +1,114 @@
+#include "cache.h"
+#include "sha1-lookup.h"
+#include "refs.h"
+
+static struct replace_object {
+ unsigned char sha1[2][20];
+} **replace_object;
+
+static int replace_object_alloc, replace_object_nr;
+
+static const unsigned char *replace_sha1_access(size_t index, void *table)
+{
+ struct replace_object **replace = table;
+ return replace[index]->sha1[0];
+}
+
+static int replace_object_pos(const unsigned char *sha1)
+{
+ return sha1_pos(sha1, replace_object, replace_object_nr,
+ replace_sha1_access);
+}
+
+static int register_replace_object(struct replace_object *replace,
+ int ignore_dups)
+{
+ int pos = replace_object_pos(replace->sha1[0]);
+
+ if (0 <= pos) {
+ if (ignore_dups)
+ free(replace);
+ else {
+ free(replace_object[pos]);
+ replace_object[pos] = replace;
+ }
+ return 1;
+ }
+ pos = -pos - 1;
+ if (replace_object_alloc <= ++replace_object_nr) {
+ replace_object_alloc = alloc_nr(replace_object_alloc);
+ replace_object = xrealloc(replace_object,
+ sizeof(*replace_object) *
+ replace_object_alloc);
+ }
+ if (pos < replace_object_nr)
+ memmove(replace_object + pos + 1,
+ replace_object + pos,
+ (replace_object_nr - pos - 1) *
+ sizeof(*replace_object));
+ replace_object[pos] = replace;
+ return 0;
+}
+
+static int register_replace_ref(const char *refname,
+ const unsigned char *sha1,
+ int flag, void *cb_data)
+{
+ /* Get sha1 from refname */
+ const char *slash = strrchr(refname, '/');
+ const char *hash = slash ? slash + 1 : refname;
+ struct replace_object *repl_obj = xmalloc(sizeof(*repl_obj));
+
+ if (strlen(hash) != 40 || get_sha1_hex(hash, repl_obj->sha1[0])) {
+ free(repl_obj);
+ warning("bad replace ref name: %s", refname);
+ return 0;
+ }
+
+ /* Copy sha1 from the read ref */
+ hashcpy(repl_obj->sha1[1], sha1);
+
+ /* Register new object */
+ if (register_replace_object(repl_obj, 1))
+ die("duplicate replace ref: %s", refname);
+
+ return 0;
+}
+
+static void prepare_replace_object(void)
+{
+ static int replace_object_prepared;
+
+ if (replace_object_prepared)
+ return;
+
+ for_each_replace_ref(register_replace_ref, NULL);
+ replace_object_prepared = 1;
+}
+
+/* We allow "recursive" replacement. Only within reason, though */
+#define MAXREPLACEDEPTH 5
+
+const unsigned char *lookup_replace_object(const unsigned char *sha1)
+{
+ int pos, depth = MAXREPLACEDEPTH;
+ const unsigned char *cur = sha1;
+
+ if (!read_replace_refs)
+ return sha1;
+
+ prepare_replace_object();
+
+ /* Try to recursively replace the object */
+ do {
+ if (--depth < 0)
+ die("replace depth too high for object %s",
+ sha1_to_hex(sha1));
+
+ pos = replace_object_pos(cur);
+ if (0 <= pos)
+ cur = replace_object[pos]->sha1[1];
+ } while (0 <= pos);
+
+ return cur;
+}
diff --git a/sha1_file.c b/sha1_file.c
index 1d996a1..4ea0b18 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -2144,13 +2144,26 @@ static void *read_object(const unsigned char *sha1, enum object_type *type,
return read_packed_sha1(sha1, type, size);
}
-void *read_sha1_file(const unsigned char *sha1, enum object_type *type,
- unsigned long *size)
+void *read_sha1_file_repl(const unsigned char *sha1,
+ enum object_type *type,
+ unsigned long *size,
+ const unsigned char **replacement)
{
- void *data = read_object(sha1, type, size);
+ const unsigned char *repl = lookup_replace_object(sha1);
+ void *data = read_object(repl, type, size);
+
+ /* die if we replaced an object with one that does not exist */
+ if (!data && repl != sha1)
+ die("replacement %s not found for %s",
+ sha1_to_hex(repl), sha1_to_hex(sha1));
+
/* legacy behavior is to die on corrupted objects */
- if (!data && (has_loose_object(sha1) || has_packed_and_bad(sha1)))
- die("object %s is corrupted", sha1_to_hex(sha1));
+ if (!data && (has_loose_object(repl) || has_packed_and_bad(repl)))
+ die("object %s is corrupted", sha1_to_hex(repl));
+
+ if (replacement)
+ *replacement = repl;
+
return data;
}
diff --git a/t/t6050-replace.sh b/t/t6050-replace.sh
new file mode 100755
index 0000000..8b8bd81
--- /dev/null
+++ b/t/t6050-replace.sh
@@ -0,0 +1,200 @@
+#!/bin/sh
+#
+# Copyright (c) 2008 Christian Couder
+#
+test_description='Tests replace refs functionality'
+
+exec </dev/null
+
+. ./test-lib.sh
+
+add_and_commit_file()
+{
+ _file="$1"
+ _msg="$2"
+
+ git add $_file || return $?
+ test_tick || return $?
+ git commit --quiet -m "$_file: $_msg"
+}
+
+HASH1=
+HASH2=
+HASH3=
+HASH4=
+HASH5=
+HASH6=
+HASH7=
+
+test_expect_success 'set up buggy branch' '
+ echo "line 1" >> hello &&
+ echo "line 2" >> hello &&
+ echo "line 3" >> hello &&
+ echo "line 4" >> hello &&
+ add_and_commit_file hello "4 lines" &&
+ HASH1=$(git rev-parse --verify HEAD) &&
+ echo "line BUG" >> hello &&
+ echo "line 6" >> hello &&
+ echo "line 7" >> hello &&
+ echo "line 8" >> hello &&
+ add_and_commit_file hello "4 more lines with a BUG" &&
+ HASH2=$(git rev-parse --verify HEAD) &&
+ echo "line 9" >> hello &&
+ echo "line 10" >> hello &&
+ add_and_commit_file hello "2 more lines" &&
+ HASH3=$(git rev-parse --verify HEAD) &&
+ echo "line 11" >> hello &&
+ add_and_commit_file hello "1 more line" &&
+ HASH4=$(git rev-parse --verify HEAD) &&
+ sed -e "s/BUG/5/" hello > hello.new &&
+ mv hello.new hello &&
+ add_and_commit_file hello "BUG fixed" &&
+ HASH5=$(git rev-parse --verify HEAD) &&
+ echo "line 12" >> hello &&
+ echo "line 13" >> hello &&
+ add_and_commit_file hello "2 more lines" &&
+ HASH6=$(git rev-parse --verify HEAD)
+ echo "line 14" >> hello &&
+ echo "line 15" >> hello &&
+ echo "line 16" >> hello &&
+ add_and_commit_file hello "again 3 more lines" &&
+ HASH7=$(git rev-parse --verify HEAD)
+'
+
+test_expect_success 'replace the author' '
+ git cat-file commit $HASH2 | grep "author A U Thor" &&
+ R=$(git cat-file commit $HASH2 | sed -e "s/A U/O/" | git hash-object -t commit --stdin -w) &&
+ git cat-file commit $R | grep "author O Thor" &&
+ git update-ref refs/replace/$HASH2 $R &&
+ git show HEAD~5 | grep "O Thor" &&
+ git show $HASH2 | grep "O Thor"
+'
+
+cat >tag.sig <<EOF
+object $HASH2
+type commit
+tag mytag
+tagger T A Gger <> 0 +0000
+
+EOF
+
+test_expect_success 'tag replaced commit' '
+ git mktag <tag.sig >.git/refs/tags/mytag 2>message
+'
+
+test_expect_success '"git fsck" works' '
+ git fsck master > fsck_master.out &&
+ grep "dangling commit $R" fsck_master.out &&
+ grep "dangling tag $(cat .git/refs/tags/mytag)" fsck_master.out &&
+ test -z "$(git fsck)"
+'
+
+test_expect_success 'repack, clone and fetch work' '
+ git repack -a -d &&
+ git clone --no-hardlinks . clone_dir &&
+ cd clone_dir &&
+ git show HEAD~5 | grep "A U Thor" &&
+ git show $HASH2 | grep "A U Thor" &&
+ git cat-file commit $R &&
+ git repack -a -d &&
+ test_must_fail git cat-file commit $R &&
+ git fetch ../ "refs/replace/*:refs/replace/*" &&
+ git show HEAD~5 | grep "O Thor" &&
+ git show $HASH2 | grep "O Thor" &&
+ git cat-file commit $R &&
+ cd ..
+'
+
+test_expect_success '"git replace" listing and deleting' '
+ test "$HASH2" = "$(git replace -l)" &&
+ test "$HASH2" = "$(git replace)" &&
+ aa=${HASH2%??????????????????????????????????????} &&
+ test "$HASH2" = "$(git replace -l "$aa*")" &&
+ test_must_fail git replace -d $R &&
+ test_must_fail git replace -d &&
+ test_must_fail git replace -l -d $HASH2 &&
+ git replace -d $HASH2 &&
+ git show $HASH2 | grep "A U Thor" &&
+ test -z "$(git replace -l)"
+'
+
+test_expect_success '"git replace" replacing' '
+ git replace $HASH2 $R &&
+ git show $HASH2 | grep "O Thor" &&
+ test_must_fail git replace $HASH2 $R &&
+ git replace -f $HASH2 $R &&
+ test_must_fail git replace -f &&
+ test "$HASH2" = "$(git replace)"
+'
+
+# This creates a side branch where the bug in H2
+# does not appear because P2 is created by applying
+# H2 and squashing H5 into it.
+# P3, P4 and P6 are created by cherry-picking H3, H4
+# and H6 respectively.
+#
+# At this point, we should have the following:
+#
+# P2--P3--P4--P6
+# /
+# H1-H2-H3-H4-H5-H6-H7
+#
+# Then we replace H6 with P6.
+#
+test_expect_success 'create parallel branch without the bug' '
+ git replace -d $HASH2 &&
+ git show $HASH2 | grep "A U Thor" &&
+ git checkout $HASH1 &&
+ git cherry-pick $HASH2 &&
+ git show $HASH5 | git apply &&
+ git commit --amend -m "hello: 4 more lines WITHOUT the bug" hello &&
+ PARA2=$(git rev-parse --verify HEAD) &&
+ git cherry-pick $HASH3 &&
+ PARA3=$(git rev-parse --verify HEAD) &&
+ git cherry-pick $HASH4 &&
+ PARA4=$(git rev-parse --verify HEAD) &&
+ git cherry-pick $HASH6 &&
+ PARA6=$(git rev-parse --verify HEAD) &&
+ git replace $HASH6 $PARA6 &&
+ git checkout master &&
+ cur=$(git rev-parse --verify HEAD) &&
+ test "$cur" = "$HASH7" &&
+ git log --pretty=oneline | grep $PARA2 &&
+ git remote add cloned ./clone_dir
+'
+
+test_expect_success 'push to cloned repo' '
+ git push cloned $HASH6^:refs/heads/parallel &&
+ cd clone_dir &&
+ git checkout parallel &&
+ git log --pretty=oneline | grep $PARA2 &&
+ cd ..
+'
+
+test_expect_success 'push branch with replacement' '
+ git cat-file commit $PARA3 | grep "author A U Thor" &&
+ S=$(git cat-file commit $PARA3 | sed -e "s/A U/O/" | git hash-object -t commit --stdin -w) &&
+ git cat-file commit $S | grep "author O Thor" &&
+ git replace $PARA3 $S &&
+ git show $HASH6~2 | grep "O Thor" &&
+ git show $PARA3 | grep "O Thor" &&
+ git push cloned $HASH6^:refs/heads/parallel2 &&
+ cd clone_dir &&
+ git checkout parallel2 &&
+ git log --pretty=oneline | grep $PARA3 &&
+ git show $PARA3 | grep "A U Thor" &&
+ cd ..
+'
+
+test_expect_success 'fetch branch with replacement' '
+ git branch tofetch $HASH6 &&
+ cd clone_dir &&
+ git fetch origin refs/heads/tofetch:refs/heads/parallel3
+ git log --pretty=oneline parallel3 | grep $PARA3
+ git show $PARA3 | grep "A U Thor"
+ cd ..
+'
+
+#
+#
+test_done
diff --git a/upload-pack.c b/upload-pack.c
index f7d308a..4d8be83 100644
--- a/upload-pack.c
+++ b/upload-pack.c
@@ -651,6 +651,7 @@ int main(int argc, char **argv)
int strict = 0;
git_extract_argv0_path(argv[0]);
+ read_replace_refs = 0;
for (i = 1; i < argc; i++) {
char *arg = argv[i];