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working from subdirectory: preparation 

- prefix_filename() is like prefix_path() but can be used to
   name any file on the filesystem, not the files that might go
   into the index file.

 - setup_git_directory_gently() tries to find the GIT_DIR, but does
   not die() if called outside a git repository.

Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano 2005-11-25 23:14:15 -08:00
parent 9ef2b3cbf6
commit 4ca0660816
2 changed files with 27 additions and 3 deletions
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2
cache.h
View File

@ -147,8 +147,10 @@ extern char *get_graft_file(void);
#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
extern const char **get_pathspec(const char *prefix, const char **pathspec);
extern const char *setup_git_directory_gently(int *);
extern const char *setup_git_directory(void);
extern const char *prefix_path(const char *prefix, int len, const char *path);
extern const char *prefix_filename(const char *prefix, int len, const char *path);
#define alloc_nr(x) (((x)+16)*3/2)

28
setup.c
View File

@ -47,6 +47,21 @@ const char *prefix_path(const char *prefix, int len, const char *path)
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;
@ -92,7 +107,7 @@ static int is_toplevel_directory(void)
return 1;
}
static const char *setup_git_directory_1(void)
const char *setup_git_directory_gently(int *nongit_ok)
{
static char cwd[PATH_MAX+1];
int len, offset;
@ -139,8 +154,15 @@ static const char *setup_git_directory_1(void)
break;
chdir("..");
do {
if (!offset)
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] != '/');
}
@ -172,7 +194,7 @@ int check_repository_format(void)
const char *setup_git_directory(void)
{
const char *retval = setup_git_directory_1();
const char *retval = setup_git_directory_gently(NULL);
check_repository_format();
return retval;
}