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| | #include "cache.h"
#include "dir.h"
#include "ll-merge.h"
#include "merge-strategies.h"
#include "xdiff-interface.h"
static int add_to_index_cacheinfo(struct index_state *istate,
unsigned int mode,
const struct object_id *oid, const char *path)
{
struct cache_entry *ce;
int len, option;
if (!verify_path(path, mode))
return error(_("Invalid path '%s'"), path);
len = strlen(path);
ce = make_empty_cache_entry(istate, len);
oidcpy(&ce->oid, oid);
memcpy(ce->name, path, len);
ce->ce_flags = create_ce_flags(0);
ce->ce_namelen = len;
ce->ce_mode = create_ce_mode(mode);
if (assume_unchanged)
ce->ce_flags |= CE_VALID;
option = ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE;
if (add_index_entry(istate, ce, option))
return error(_("%s: cannot add to the index"), path);
return 0;
}
static int checkout_from_index(struct index_state *istate, const char *path)
{
struct checkout state = CHECKOUT_INIT;
struct cache_entry *ce;
state.istate = istate;
state.force = 1;
state.base_dir = "";
state.base_dir_len = 0;
ce = index_file_exists(istate, path, strlen(path), 0);
if (checkout_entry(ce, &state, NULL, NULL) < 0)
return error(_("%s: cannot checkout file"), path);
return 0;
}
static int merge_one_file_deleted(struct index_state *istate,
const struct object_id *orig_blob,
const struct object_id *our_blob,
const struct object_id *their_blob, const char *path,
unsigned int orig_mode, unsigned int our_mode, unsigned int their_mode)
{
if ((our_blob && orig_mode != our_mode) ||
(their_blob && orig_mode != their_mode))
return error(_("File %s deleted on one branch but had its "
"permissions changed on the other."), path);
if (our_blob) {
printf(_("Removing %s\n"), path);
if (file_exists(path))
remove_path(path);
}
if (remove_file_from_index(istate, path))
return error("%s: cannot remove from the index", path);
return 0;
}
static int do_merge_one_file(struct index_state *istate,
const struct object_id *orig_blob,
const struct object_id *our_blob,
const struct object_id *their_blob, const char *path,
unsigned int orig_mode, unsigned int our_mode, unsigned int their_mode)
{
int ret, i, dest;
ssize_t written;
mmbuffer_t result = {NULL, 0};
mmfile_t mmfs[3];
struct ll_merge_options merge_opts = {0};
struct cache_entry *ce;
if (our_mode == S_IFLNK || their_mode == S_IFLNK)
return error(_("%s: Not merging symbolic link changes."), path);
else if (our_mode == S_IFGITLINK || their_mode == S_IFGITLINK)
return error(_("%s: Not merging conflicting submodule changes."), path);
read_mmblob(mmfs + 1, our_blob);
read_mmblob(mmfs + 2, their_blob);
if (orig_blob) {
printf(_("Auto-merging %s\n"), path);
read_mmblob(mmfs + 0, orig_blob);
} else {
printf(_("Added %s in both, but differently.\n"), path);
read_mmblob(mmfs + 0, &null_oid);
}
merge_opts.xdl_opts = XDL_MERGE_ZEALOUS_ALNUM;
ret = ll_merge(&result, path,
mmfs + 0, "orig",
mmfs + 1, "our",
mmfs + 2, "their",
istate, &merge_opts);
for (i = 0; i < 3; i++)
free(mmfs[i].ptr);
if (ret < 0) {
free(result.ptr);
return error(_("Failed to execute internal merge"));
}
/*
* Create the working tree file, using "our tree" version from
* the index, and then store the result of the merge.
*/
ce = index_file_exists(istate, path, strlen(path), 0);
if (!ce)
BUG("file is not present in the cache?");
unlink(path);
if ((dest = open(path, O_WRONLY | O_CREAT, ce->ce_mode)) < 0) {
free(result.ptr);
return error_errno(_("failed to open file '%s'"), path);
}
written = write_in_full(dest, result.ptr, result.size);
close(dest);
free(result.ptr);
if (written < 0)
return error_errno(_("failed to write to '%s'"), path);
if (ret != 0 || !orig_blob)
ret = error(_("content conflict in %s"), path);
if (our_mode != their_mode)
return error(_("permission conflict: %o->%o,%o in %s"),
orig_mode, our_mode, their_mode, path);
if (ret)
return -1;
return add_file_to_index(istate, path, 0);
}
int merge_strategies_one_file(struct repository *r,
const struct object_id *orig_blob,
const struct object_id *our_blob,
const struct object_id *their_blob, const char *path,
unsigned int orig_mode, unsigned int our_mode,
unsigned int their_mode)
{
if (orig_blob &&
((!their_blob && our_blob && oideq(orig_blob, our_blob)) ||
(!our_blob && their_blob && oideq(orig_blob, their_blob))))
/* Deleted in both or deleted in one and unchanged in the other. */
return merge_one_file_deleted(r->index,
orig_blob, our_blob, their_blob, path,
orig_mode, our_mode, their_mode);
else if (!orig_blob && our_blob && !their_blob) {
/*
* Added in one. The other side did not add and we
* added so there is nothing to be done, except making
* the path merged.
*/
return add_to_index_cacheinfo(r->index, our_mode, our_blob, path);
} else if (!orig_blob && !our_blob && their_blob) {
printf(_("Adding %s\n"), path);
if (file_exists(path))
return error(_("untracked %s is overwritten by the merge."), path);
if (add_to_index_cacheinfo(r->index, their_mode, their_blob, path))
return -1;
return checkout_from_index(r->index, path);
} else if (!orig_blob && our_blob && their_blob &&
oideq(our_blob, their_blob)) {
/* Added in both, identically (check for same permissions). */
if (our_mode != their_mode)
return error(_("File %s added identically in both branches, "
"but permissions conflict %o->%o."),
path, our_mode, their_mode);
printf(_("Adding %s\n"), path);
if (add_to_index_cacheinfo(r->index, our_mode, our_blob, path))
return -1;
return checkout_from_index(r->index, path);
} else if (our_blob && their_blob)
/* Modified in both, but differently. */
return do_merge_one_file(r->index,
orig_blob, our_blob, their_blob, path,
orig_mode, our_mode, their_mode);
else {
char orig_hex[GIT_MAX_HEXSZ] = {0}, our_hex[GIT_MAX_HEXSZ] = {0},
their_hex[GIT_MAX_HEXSZ] = {0};
if (orig_blob)
oid_to_hex_r(orig_hex, orig_blob);
if (our_blob)
oid_to_hex_r(our_hex, our_blob);
if (their_blob)
oid_to_hex_r(their_hex, their_blob);
return error(_("%s: Not handling case %s -> %s -> %s"),
path, orig_hex, our_hex, their_hex);
}
return 0;
}
|