Revision 31991b0260216d16f2e447e68bcabd9d9cce26ba authored by Ævar Arnfjörð Bjarmason on 05 July 2010, 17:33:03 UTC, committed by Junio C Hamano on 05 July 2010, 18:53:59 UTC
Change `git submodule add' to add the new submodule <path> with `git add --force'. I keep my /etc in .git with a .gitignore that contains just "*". I.e. `git status' will ignore everything that isn't in the tree already. When I do: git submodule add <url> hlagh git-submodule will get as far as checking out the remote repository into hlagh, but it'll die right afterwards when it fails to add the new path: The following paths are ignored by one of your .gitignore files: hlagh Use -f if you really want to add them. fatal: no files added Failed to add submodule 'hlagh' Currently there's no way to add a submodule in this situation other than to remove the ignored path from the .gitignore while I'm at it. That's silly, when you run `git submodule add' you're explicitly saying that you want to add something *new* to the repository. Instead it should just add the path with `git add --force'. Initially I implemented this by adding new -f and --force options to `git submodule add'. But if the --force option isn't supplied it'll get as far as cloning `hlagh', but won't add it. So the first thing the user has to do is to remove `hlagh' and then try again with the --force option. That sucks, it should just add the path to begin with. I can't think of any usecase where you've gone through the trouble of typing out `git submodule add ..', but wish to be overriden by a `gitignore'. The submodule semantics should be more like `git init', not `git add'. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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delta.h
#ifndef DELTA_H
#define DELTA_H
/* opaque object for delta index */
struct delta_index;
/*
* create_delta_index: compute index data from given buffer
*
* This returns a pointer to a struct delta_index that should be passed to
* subsequent create_delta() calls, or to free_delta_index(). A NULL pointer
* is returned on failure. The given buffer must not be freed nor altered
* before free_delta_index() is called. The returned pointer must be freed
* using free_delta_index().
*/
extern struct delta_index *
create_delta_index(const void *buf, unsigned long bufsize);
/*
* free_delta_index: free the index created by create_delta_index()
*
* Given pointer must be what create_delta_index() returned, or NULL.
*/
extern void free_delta_index(struct delta_index *index);
/*
* sizeof_delta_index: returns memory usage of delta index
*
* Given pointer must be what create_delta_index() returned, or NULL.
*/
extern unsigned long sizeof_delta_index(struct delta_index *index);
/*
* create_delta: create a delta from given index for the given buffer
*
* This function may be called multiple times with different buffers using
* the same delta_index pointer. If max_delta_size is non-zero and the
* resulting delta is to be larger than max_delta_size then NULL is returned.
* On success, a non-NULL pointer to the buffer with the delta data is
* returned and *delta_size is updated with its size. The returned buffer
* must be freed by the caller.
*/
extern void *
create_delta(const struct delta_index *index,
const void *buf, unsigned long bufsize,
unsigned long *delta_size, unsigned long max_delta_size);
/*
* diff_delta: create a delta from source buffer to target buffer
*
* If max_delta_size is non-zero and the resulting delta is to be larger
* than max_delta_size then NULL is returned. On success, a non-NULL
* pointer to the buffer with the delta data is returned and *delta_size is
* updated with its size. The returned buffer must be freed by the caller.
*/
static inline void *
diff_delta(const void *src_buf, unsigned long src_bufsize,
const void *trg_buf, unsigned long trg_bufsize,
unsigned long *delta_size, unsigned long max_delta_size)
{
struct delta_index *index = create_delta_index(src_buf, src_bufsize);
if (index) {
void *delta = create_delta(index, trg_buf, trg_bufsize,
delta_size, max_delta_size);
free_delta_index(index);
return delta;
}
return NULL;
}
/*
* patch_delta: recreate target buffer given source buffer and delta data
*
* On success, a non-NULL pointer to the target buffer is returned and
* *trg_bufsize is updated with its size. On failure a NULL pointer is
* returned. The returned buffer must be freed by the caller.
*/
extern void *patch_delta(const void *src_buf, unsigned long src_size,
const void *delta_buf, unsigned long delta_size,
unsigned long *dst_size);
/* the smallest possible delta size is 4 bytes */
#define DELTA_SIZE_MIN 4
/*
* This must be called twice on the delta data buffer, first to get the
* expected source buffer size, and again to get the target buffer size.
*/
static inline unsigned long get_delta_hdr_size(const unsigned char **datap,
const unsigned char *top)
{
const unsigned char *data = *datap;
unsigned long cmd, size = 0;
int i = 0;
do {
cmd = *data++;
size |= (cmd & 0x7f) << i;
i += 7;
} while (cmd & 0x80 && data < top);
*datap = data;
return size;
}
#endif
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