2de9de5e4a
Expanding system paths relative to git_exec_path can be used for
creating an installation that can be moved to a different directory
without re-compiling. We use this approach for template_dir and the
system wide gitconfig. The Windows installer (msysgit) is an example
for such a setup.
This commit moves common code to a new function system_path(). System
paths that are to be interpreted relative to git_exec_path are passed to
system_path() and the return value is used instead of the original path.
system_path() prefixes a relative path with git_exec_path and leaves
absolute paths unmodified. For example, we now write
template_dir = system_path(DEFAULT_GIT_TEMPLATE_DIR);
[j6t: moved from path.c to exec_cmd.c]
Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
156 lines
2.8 KiB
C
156 lines
2.8 KiB
C
#include "cache.h"
|
|
#include "exec_cmd.h"
|
|
#include "quote.h"
|
|
#define MAX_ARGS 32
|
|
|
|
extern char **environ;
|
|
static const char *argv_exec_path;
|
|
|
|
static const char *builtin_exec_path(void)
|
|
{
|
|
#ifndef __MINGW32__
|
|
return GIT_EXEC_PATH;
|
|
#else
|
|
int len;
|
|
char *p, *q, *sl;
|
|
static char *ep;
|
|
if (ep)
|
|
return ep;
|
|
|
|
len = strlen(_pgmptr);
|
|
if (len < 2)
|
|
return ep = ".";
|
|
|
|
p = ep = xmalloc(len+1);
|
|
q = _pgmptr;
|
|
sl = NULL;
|
|
/* copy program name, turn '\\' into '/', skip last part */
|
|
while ((*p = *q)) {
|
|
if (*q == '\\' || *q == '/') {
|
|
*p = '/';
|
|
sl = p;
|
|
}
|
|
p++, q++;
|
|
}
|
|
if (sl)
|
|
*sl = '\0';
|
|
else
|
|
ep[0] = '.', ep[1] = '\0';
|
|
return ep;
|
|
#endif
|
|
}
|
|
|
|
const char *system_path(const char *path)
|
|
{
|
|
if (!is_absolute_path(path)) {
|
|
struct strbuf d = STRBUF_INIT;
|
|
strbuf_addf(&d, "%s/%s", git_exec_path(), path);
|
|
path = strbuf_detach(&d, NULL);
|
|
}
|
|
return path;
|
|
}
|
|
|
|
void git_set_argv_exec_path(const char *exec_path)
|
|
{
|
|
argv_exec_path = exec_path;
|
|
}
|
|
|
|
|
|
/* Returns the highest-priority, location to look for git programs. */
|
|
const char *git_exec_path(void)
|
|
{
|
|
const char *env;
|
|
|
|
if (argv_exec_path)
|
|
return argv_exec_path;
|
|
|
|
env = getenv(EXEC_PATH_ENVIRONMENT);
|
|
if (env && *env) {
|
|
return env;
|
|
}
|
|
|
|
return builtin_exec_path();
|
|
}
|
|
|
|
static void add_path(struct strbuf *out, const char *path)
|
|
{
|
|
if (path && *path) {
|
|
if (is_absolute_path(path))
|
|
strbuf_addstr(out, path);
|
|
else
|
|
strbuf_addstr(out, make_absolute_path(path));
|
|
|
|
strbuf_addch(out, PATH_SEP);
|
|
}
|
|
}
|
|
|
|
void setup_path(const char *cmd_path)
|
|
{
|
|
const char *old_path = getenv("PATH");
|
|
struct strbuf new_path;
|
|
|
|
strbuf_init(&new_path, 0);
|
|
|
|
add_path(&new_path, argv_exec_path);
|
|
add_path(&new_path, getenv(EXEC_PATH_ENVIRONMENT));
|
|
add_path(&new_path, builtin_exec_path());
|
|
add_path(&new_path, cmd_path);
|
|
|
|
if (old_path)
|
|
strbuf_addstr(&new_path, old_path);
|
|
else
|
|
strbuf_addstr(&new_path, "/usr/local/bin:/usr/bin:/bin");
|
|
|
|
setenv("PATH", new_path.buf, 1);
|
|
|
|
strbuf_release(&new_path);
|
|
}
|
|
|
|
int execv_git_cmd(const char **argv)
|
|
{
|
|
int argc;
|
|
const char **nargv;
|
|
|
|
for (argc = 0; argv[argc]; argc++)
|
|
; /* just counting */
|
|
nargv = xmalloc(sizeof(*nargv) * (argc + 2));
|
|
|
|
nargv[0] = "git";
|
|
for (argc = 0; argv[argc]; argc++)
|
|
nargv[argc + 1] = argv[argc];
|
|
nargv[argc + 1] = NULL;
|
|
trace_argv_printf(nargv, "trace: exec:");
|
|
|
|
/* execvp() can only ever return if it fails */
|
|
execvp("git", (char **)nargv);
|
|
|
|
trace_printf("trace: exec failed: %s\n", strerror(errno));
|
|
|
|
free(nargv);
|
|
return -1;
|
|
}
|
|
|
|
|
|
int execl_git_cmd(const char *cmd,...)
|
|
{
|
|
int argc;
|
|
const char *argv[MAX_ARGS + 1];
|
|
const char *arg;
|
|
va_list param;
|
|
|
|
va_start(param, cmd);
|
|
argv[0] = cmd;
|
|
argc = 1;
|
|
while (argc < MAX_ARGS) {
|
|
arg = argv[argc++] = va_arg(param, char *);
|
|
if (!arg)
|
|
break;
|
|
}
|
|
va_end(param);
|
|
if (MAX_ARGS <= argc)
|
|
return error("too many args to run %s", cmd);
|
|
|
|
argv[argc] = NULL;
|
|
return execv_git_cmd(argv);
|
|
}
|