Revision 28e77a81647584bfbe112f19e12e9952ab0b2fab authored by Junio C Hamano on 11 December 2005, 06:05:01 UTC, committed by Junio C Hamano on 11 December 2005, 09:47:15 UTC
This does two things. - When one branch renamed and the other branch did not, the resulting half-merged file in the working tree used to swap branches around and showed as if renaming side was "ours". This was confusing and inconsistent (even though the conflict markers were marked with branch names, it was not a good enough excuse). This changes the order of arguments to mergeFile in such a case to make sure we always see "our" change between <<< and ===, and "their" change between === and >>>. - When both branches renamed to the same path, and when one branch renamed and the other branch did not, we attempt mergeFile. When this automerge conflicted, we used to collapse the index. Now we use update-index --index-info to inject higher stage entries to leave the index in unmerged state for these two cases. What this still does _not_ do is to inject unmerged state into the index when the structural changes conflict. I have not thought things through what to do in each case yet, but the cases this commit cover are the most common ones, so this would be a good start. Signed-off-by: Junio C Hamano <junkio@cox.net>
1 parent 7564577
setup.c
#include "cache.h"
const char *prefix_path(const char *prefix, int len, const char *path)
{
const char *orig = path;
for (;;) {
char c;
if (*path != '.')
break;
c = path[1];
/* "." */
if (!c) {
path++;
break;
}
/* "./" */
if (c == '/') {
path += 2;
continue;
}
if (c != '.')
break;
c = path[2];
if (!c)
path += 2;
else if (c == '/')
path += 3;
else
break;
/* ".." and "../" */
/* Remove last component of the prefix */
do {
if (!len)
die("'%s' is outside repository", orig);
len--;
} while (len && prefix[len-1] != '/');
continue;
}
if (len) {
int speclen = strlen(path);
char *n = xmalloc(speclen + len + 1);
memcpy(n, prefix, len);
memcpy(n + len, path, speclen+1);
path = n;
}
return path;
}
/*
* Unlike prefix_path, this should be used if the named file does
* not have to interact with index entry; i.e. name of a random file
* on the filesystem.
*/
const char *prefix_filename(const char *pfx, int pfx_len, const char *arg)
{
static char path[PATH_MAX];
if (!pfx || !*pfx || arg[0] == '/')
return arg;
memcpy(path, pfx, pfx_len);
strcpy(path + pfx_len, arg);
return path;
}
const char **get_pathspec(const char *prefix, const char **pathspec)
{
const char *entry = *pathspec;
const char **p;
int prefixlen;
if (!prefix && !entry)
return NULL;
if (!entry) {
static const char *spec[2];
spec[0] = prefix;
spec[1] = NULL;
return spec;
}
/* Otherwise we have to re-write the entries.. */
p = pathspec;
prefixlen = prefix ? strlen(prefix) : 0;
do {
*p = prefix_path(prefix, prefixlen, entry);
} while ((entry = *++p) != NULL);
return (const char **) pathspec;
}
/*
* Test if it looks like we're at the top level git directory.
* We want to see:
*
* - either a .git/objects/ directory _or_ the proper
* GIT_OBJECT_DIRECTORY environment variable
* - a refs/ directory under ".git"
* - either a HEAD symlink or a HEAD file that is formatted as
* a proper "ref:".
*/
static int is_toplevel_directory(void)
{
if (access(".git/refs/", X_OK) ||
access(getenv(DB_ENVIRONMENT) ?
getenv(DB_ENVIRONMENT) : ".git/objects/", X_OK) ||
validate_symref(".git/HEAD"))
return 0;
return 1;
}
const char *setup_git_directory_gently(int *nongit_ok)
{
static char cwd[PATH_MAX+1];
int len, offset;
/*
* If GIT_DIR is set explicitly, we're not going
* to do any discovery, but we still do repository
* validation.
*/
if (getenv(GIT_DIR_ENVIRONMENT)) {
char path[PATH_MAX];
int len = strlen(getenv(GIT_DIR_ENVIRONMENT));
if (sizeof(path) - 40 < len)
die("'$%s' too big", GIT_DIR_ENVIRONMENT);
memcpy(path, getenv(GIT_DIR_ENVIRONMENT), len);
strcpy(path + len, "/refs");
if (access(path, X_OK))
goto bad_dir_environ;
strcpy(path + len, "/HEAD");
if (validate_symref(path))
goto bad_dir_environ;
if (getenv(DB_ENVIRONMENT)) {
if (access(getenv(DB_ENVIRONMENT), X_OK))
goto bad_dir_environ;
}
else {
strcpy(path + len, "/objects");
if (access(path, X_OK))
goto bad_dir_environ;
}
return NULL;
bad_dir_environ:
path[len] = 0;
die("Not a git repository: '%s'", path);
}
if (!getcwd(cwd, sizeof(cwd)) || cwd[0] != '/')
die("Unable to read current working directory");
offset = len = strlen(cwd);
for (;;) {
if (is_toplevel_directory())
break;
chdir("..");
do {
if (!offset) {
if (nongit_ok) {
if (chdir(cwd))
die("Cannot come back to cwd");
*nongit_ok = 1;
return NULL;
}
die("Not a git repository");
}
} while (cwd[--offset] != '/');
}
if (offset == len)
return NULL;
/* Make "offset" point to past the '/', and add a '/' at the end */
offset++;
cwd[len++] = '/';
cwd[len] = 0;
return cwd + offset;
}
int check_repository_format_version(const char *var, const char *value)
{
if (strcmp(var, "core.repositoryformatversion") == 0)
repository_format_version = git_config_int(var, value);
return 0;
}
int check_repository_format(void)
{
git_config(check_repository_format_version);
if (GIT_REPO_VERSION < repository_format_version)
die ("Expected git repo version <= %d, found %d",
GIT_REPO_VERSION, repository_format_version);
return 0;
}
const char *setup_git_directory(void)
{
const char *retval = setup_git_directory_gently(NULL);
check_repository_format();
return retval;
}
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