mirror/ git
1
0
Fork 0
mirror of https://github.com/git/git.git synced 2024-05-29 01:36:13 +02:00
Code

replace: add a --raw mode for --edit 

One of the purposes of "git replace --edit" is to help a
user repair objects which are malformed or corrupted.
Usually we pretty-print trees with "ls-tree", which is much
easier to work with than the raw binary data.  However, some
forms of corruption break the tree-walker, in which case our
pretty-printing fails, rendering "--edit" useless for the
user.

This patch introduces a "--raw" option, which lets you edit
the binary data in these instances.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2014-06-24 05:46:31 -04:00 committed by Junio C Hamano
parent 36857e0026
commit 2deda629c2
2 changed files with 29 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
Documentation/git-replace.txt
View File

@ -73,6 +73,14 @@ OPTIONS
newly created object. See linkgit:git-var[1] for details about
how the editor will be chosen.
--raw::
When editing, provide the raw object contents rather than
pretty-printed ones. Currently this only affects trees, which
will be shown in their binary form. This is harder to work with,
but can help when repairing a tree that is so corrupted it
cannot be pretty-printed. Note that you may need to configure
your editor to cleanly read and write binary data.
-l <pattern>::
--list <pattern>::
List replace refs for objects that match the given pattern (or

31
builtin/replace.c
View File

@ -188,10 +188,12 @@ static int replace_object(const char *object_ref, const char *replace_ref, int f
}
/*
* Write the contents of the object named by "sha1" to the file "filename",
* pretty-printed for human editing based on its type.
* Write the contents of the object named by "sha1" to the file "filename".
* If "raw" is true, then the object's raw contents are printed according to
* "type". Otherwise, we pretty-print the contents for human editing.
*/
static void export_object(const unsigned char *sha1, const char *filename)
static void export_object(const unsigned char *sha1, enum object_type type,
int raw, const char *filename)
{
struct child_process cmd = { NULL };
int fd;
@ -202,7 +204,10 @@ static void export_object(const unsigned char *sha1, const char *filename)
argv_array_push(&cmd.args, "--no-replace-objects");
argv_array_push(&cmd.args, "cat-file");
argv_array_push(&cmd.args, "-p");
if (raw)
argv_array_push(&cmd.args, typename(type));
else
argv_array_push(&cmd.args, "-p");
argv_array_push(&cmd.args, sha1_to_hex(sha1));
cmd.git_cmd = 1;
cmd.out = fd;
@ -217,7 +222,7 @@ static void export_object(const unsigned char *sha1, const char *filename)
* The sha1 of the written object is returned via sha1.
*/
static void import_object(unsigned char *sha1, enum object_type type,
const char *filename)
int raw, const char *filename)
{
int fd;
@ -225,7 +230,7 @@ static void import_object(unsigned char *sha1, enum object_type type,
if (fd < 0)
die_errno("unable to open %s for reading", filename);
if (type == OBJ_TREE) {
if (!raw && type == OBJ_TREE) {
const char *argv[] = { "mktree", NULL };
struct child_process cmd = { argv };
struct strbuf result = STRBUF_INIT;
@ -265,7 +270,7 @@ static void import_object(unsigned char *sha1, enum object_type type,
*/
}
static int edit_and_replace(const char *object_ref, int force)
static int edit_and_replace(const char *object_ref, int force, int raw)
{
char *tmpfile = git_pathdup("REPLACE_EDITOBJ");
enum object_type type;
@ -281,10 +286,10 @@ static int edit_and_replace(const char *object_ref, int force)
check_ref_valid(old, prev, ref, sizeof(ref), force);
export_object(old, tmpfile);
export_object(old, type, raw, tmpfile);
if (launch_editor(tmpfile, NULL, NULL) < 0)
die("editing object file failed");
import_object(new, type, tmpfile);
import_object(new, type, raw, tmpfile);
free(tmpfile);
@ -297,6 +302,7 @@ static int edit_and_replace(const char *object_ref, int force)
int cmd_replace(int argc, const char **argv, const char *prefix)
{
int force = 0;
int raw = 0;
const char *format = NULL;
enum {
MODE_UNSPECIFIED = 0,
@ -310,6 +316,7 @@ int cmd_replace(int argc, const char **argv, const char *prefix)
OPT_CMDMODE('d', "delete", &cmdmode, N_("delete replace refs"), MODE_DELETE),
OPT_CMDMODE('e', "edit", &cmdmode, N_("edit existing object"), MODE_EDIT),
OPT_BOOL('f', "force", &force, N_("replace the ref if it exists")),
OPT_BOOL(0, "raw", &raw, N_("do not pretty-print contents for --edit")),
OPT_STRING(0, "format", &format, N_("format"), N_("use this format")),
OPT_END()
};
@ -329,6 +336,10 @@ int cmd_replace(int argc, const char **argv, const char *prefix)
usage_msg_opt("-f only makes sense when writing a replacement",
git_replace_usage, options);
if (raw && cmdmode != MODE_EDIT)
usage_msg_opt("--raw only makes sense with --edit",
git_replace_usage, options);
switch (cmdmode) {
case MODE_DELETE:
if (argc < 1)
@ -346,7 +357,7 @@ int cmd_replace(int argc, const char **argv, const char *prefix)
if (argc != 1)
usage_msg_opt("-e needs exactly one argument",
git_replace_usage, options);
return edit_and_replace(argv[0], force);
return edit_and_replace(argv[0], force, raw);
case MODE_LIST:
if (argc > 1)