Revision a9c4641df7989c9adf6af471705ebf735c35a92f authored by Alexander Kuleshov on 22 January 2015, 08:39:44 UTC, committed by Junio C Hamano on 22 January 2015, 22:44:36 UTC
The list_and_choose() helper is given a prompt and a list, asks the user to make selection from the list, and then returns a list of items chosen. Even when it is given an empty list as the original candidate set to choose from, it gave a prompt to the user, who can only say "I am done choosing". Return an empty result when the input is an empty list without bothering the user. The existing caller must already have a logic to say "Nothing to do" or an equivalent when the returned list is empty (i.e. the user chose to select nothing) if it is necessary, so no change to the callers is necessary. This fixes the case where "add untracked" is asked in "git add -i" and there is no untracked files in the working tree. We used to give an empty list of files to choose from with a prompt, but with this change, we no longer do. Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 parent 282616c
exec_cmd.c
#include "cache.h"
#include "exec_cmd.h"
#include "quote.h"
#define MAX_ARGS 32
static const char *argv_exec_path;
static const char *argv0_path;
const char *system_path(const char *path)
{
#ifdef RUNTIME_PREFIX
static const char *prefix;
#else
static const char *prefix = PREFIX;
#endif
struct strbuf d = STRBUF_INIT;
if (is_absolute_path(path))
return path;
#ifdef RUNTIME_PREFIX
assert(argv0_path);
assert(is_absolute_path(argv0_path));
if (!prefix &&
!(prefix = strip_path_suffix(argv0_path, GIT_EXEC_PATH)) &&
!(prefix = strip_path_suffix(argv0_path, BINDIR)) &&
!(prefix = strip_path_suffix(argv0_path, "git"))) {
prefix = PREFIX;
trace_printf("RUNTIME_PREFIX requested, "
"but prefix computation failed. "
"Using static fallback '%s'.\n", prefix);
}
#endif
strbuf_addf(&d, "%s/%s", prefix, path);
path = strbuf_detach(&d, NULL);
return path;
}
const char *git_extract_argv0_path(const char *argv0)
{
const char *slash;
if (!argv0 || !*argv0)
return NULL;
slash = argv0 + strlen(argv0);
while (argv0 <= slash && !is_dir_sep(*slash))
slash--;
if (slash >= argv0) {
argv0_path = xstrndup(argv0, slash - argv0);
return slash + 1;
}
return argv0;
}
void git_set_argv_exec_path(const char *exec_path)
{
argv_exec_path = exec_path;
/*
* Propagate this setting to external programs.
*/
setenv(EXEC_PATH_ENVIRONMENT, exec_path, 1);
}
/* 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 system_path(GIT_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, absolute_path(path));
strbuf_addch(out, PATH_SEP);
}
}
void setup_path(void)
{
const char *old_path = getenv("PATH");
struct strbuf new_path = STRBUF_INIT;
add_path(&new_path, git_exec_path());
add_path(&new_path, argv0_path);
if (old_path)
strbuf_addstr(&new_path, old_path);
else
strbuf_addstr(&new_path, _PATH_DEFPATH);
setenv("PATH", new_path.buf, 1);
strbuf_release(&new_path);
}
const char **prepare_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;
return nargv;
}
int execv_git_cmd(const char **argv) {
const char **nargv = prepare_git_cmd(argv);
trace_argv_printf(nargv, "trace: exec:");
/* execvp() can only ever return if it fails */
sane_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);
}
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