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shrink git-shell by avoiding redundant dependencies

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A lot of modules that have nothing to do with git-shell functionality
were linked in, bloating git-shell more than 8 times.

This patch cuts off redundant dependencies by:
1. providing stubs for three functions that make no sense for git-shell;
2. moving quote_path_fully from environment.c to quote.c to make the
   later self sufficient;
3. moving make_absolute_path into a new separate file.

The following numbers have been received with the default optimization
settings on master using GCC 4.1.2:

Before:
   text    data     bss     dec     hex filename
 143915    1348   93168  238431   3a35f git-shell

After:
   text    data     bss     dec     hex filename
  17670     788    8232   26690    6842 git-shell

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Dmitry Potapov 2008-06-28 00:46:42 +04:00 committed by Junio C Hamano
parent 2dce956e39
commit 5b8e6f85f9
6 changed files with 79 additions and 68 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Makefile
View File

@ -378,6 +378,7 @@ LIB_H += unpack-trees.h
LIB_H += utf8.h
LIB_H += wt-status.h
LIB_OBJS += abspath.o
LIB_OBJS += alias.o
LIB_OBJS += alloc.o
LIB_OBJS += archive.o

68
abspath.c Normal file
View File

@ -0,0 +1,68 @@
#include "cache.h"
/* We allow "recursive" symbolic links. Only within reason, though. */
#define MAXDEPTH 5
const char *make_absolute_path(const char *path)
{
static char bufs[2][PATH_MAX + 1], *buf = bufs[0], *next_buf = bufs[1];
char cwd[1024] = "";
int buf_index = 1, len;
int depth = MAXDEPTH;
char *last_elem = NULL;
struct stat st;
if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
die ("Too long path: %.*s", 60, path);
while (depth--) {
if (stat(buf, &st) || !S_ISDIR(st.st_mode)) {
char *last_slash = strrchr(buf, '/');
if (last_slash) {
*last_slash = '\0';
last_elem = xstrdup(last_slash + 1);
} else {
last_elem = xstrdup(buf);
*buf = '\0';
}
}
if (*buf) {
if (!*cwd && !getcwd(cwd, sizeof(cwd)))
die ("Could not get current working directory");
if (chdir(buf))
die ("Could not switch to '%s'", buf);
}
if (!getcwd(buf, PATH_MAX))
die ("Could not get current working directory");
if (last_elem) {
int len = strlen(buf);
if (len + strlen(last_elem) + 2 > PATH_MAX)
die ("Too long path name: '%s/%s'",
buf, last_elem);
buf[len] = '/';
strcpy(buf + len + 1, last_elem);
free(last_elem);
last_elem = NULL;
}
if (!lstat(buf, &st) && S_ISLNK(st.st_mode)) {
len = readlink(buf, next_buf, PATH_MAX);
if (len < 0)
die ("Invalid symlink: %s", buf);
next_buf[len] = '\0';
buf = next_buf;
buf_index = 1 - buf_index;
next_buf = bufs[buf_index];
} else
break;
}
if (*cwd && chdir(cwd))
die ("Could not change back to '%s'", cwd);
return buf;
}

1
environment.c
View File

@ -13,7 +13,6 @@ char git_default_email[MAX_GITNAME];
char git_default_name[MAX_GITNAME];
int user_ident_explicitly_given;
int trust_executable_bit = 1;
int quote_path_fully = 1;
int has_symlinks = 1;
int ignore_case;
int assume_unchanged;

67
path.c
View File

@ -327,9 +327,6 @@ const char *make_nonrelative_path(const char *path)
return buf;
}
/* We allow "recursive" symbolic links. Only within reason, though. */
#define MAXDEPTH 5
const char *make_relative_path(const char *abs, const char *base)
{
static char buf[PATH_MAX + 1];
@ -346,67 +343,3 @@ const char *make_relative_path(const char *abs, const char *base)
strcpy(buf, abs + baselen);
return buf;
}
const char *make_absolute_path(const char *path)
{
static char bufs[2][PATH_MAX + 1], *buf = bufs[0], *next_buf = bufs[1];
char cwd[1024] = "";
int buf_index = 1, len;
int depth = MAXDEPTH;
char *last_elem = NULL;
struct stat st;
if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
die ("Too long path: %.*s", 60, path);
while (depth--) {
if (stat(buf, &st) || !S_ISDIR(st.st_mode)) {
char *last_slash = strrchr(buf, '/');
if (last_slash) {
*last_slash = '\0';
last_elem = xstrdup(last_slash + 1);
} else {
last_elem = xstrdup(buf);
*buf = '\0';
}
}
if (*buf) {
if (!*cwd && !getcwd(cwd, sizeof(cwd)))
die ("Could not get current working directory");
if (chdir(buf))
die ("Could not switch to '%s'", buf);
}
if (!getcwd(buf, PATH_MAX))
die ("Could not get current working directory");
if (last_elem) {
int len = strlen(buf);
if (len + strlen(last_elem) + 2 > PATH_MAX)
die ("Too long path name: '%s/%s'",
buf, last_elem);
buf[len] = '/';
strcpy(buf + len + 1, last_elem);
free(last_elem);
last_elem = NULL;
}
if (!lstat(buf, &st) && S_ISLNK(st.st_mode)) {
len = readlink(buf, next_buf, PATH_MAX);
if (len < 0)
die ("Invalid symlink: %s", buf);
next_buf[len] = '\0';
buf = next_buf;
buf_index = 1 - buf_index;
next_buf = bufs[buf_index];
} else
break;
}
if (*cwd && chdir(cwd))
die ("Could not change back to '%s'", cwd);
return buf;
}

2
quote.c
View File

@ -1,6 +1,8 @@
#include "cache.h"
#include "quote.h"
int quote_path_fully = 1;
/* Help to copy the thing properly quoted for the shell safety.
* any single quote is replaced with '\'', any exclamation point
* is replaced with '\!', and the whole thing is enclosed in a

8
shell.c
View File

@ -3,6 +3,14 @@
#include "exec_cmd.h"
#include "strbuf.h"
/* Stubs for functions that make no sense for git-shell. These stubs
* are provided here to avoid linking in external redundant modules.
*/
void release_pack_memory(size_t need, int fd){}
void trace_argv_printf(const char **argv, const char *fmt, ...){}
void trace_printf(const char *fmt, ...){}
static int do_generic_cmd(const char *me, char *arg)
{
const char *my_argv[4];