#include <errno.h>
#include <limits.h>
#include <stdarg.h>
+#include <sys/ioctl.h>
+#include "git-compat-util.h"
+#include "exec_cmd.h"
#ifndef PATH_MAX
# define PATH_MAX 4096
if (col_string && (n_cols = atoi(col_string)) > 0)
return n_cols;
+#ifdef TIOCGWINSZ
+ {
+ struct winsize ws;
+ if (!ioctl(1, TIOCGWINSZ, &ws)) {
+ if (ws.ws_col)
+ return ws.ws_col;
+ }
+ }
+#endif
+
return 80;
}
static void pretty_print_string_list(struct cmdname **cmdname, int longest)
{
- int cols = 1;
+ int cols = 1, rows;
int space = longest + 1; /* min 1 SP between words */
int max_cols = term_columns() - 1; /* don't print *on* the edge */
- int i;
+ int i, j;
if (space < max_cols)
cols = max_cols / space;
+ rows = (cmdname_cnt + cols - 1) / cols;
qsort(cmdname, cmdname_cnt, sizeof(*cmdname), cmdname_compare);
- for (i = 0; i < cmdname_cnt; ) {
- int c;
+ for (i = 0; i < rows; i++) {
printf(" ");
- for (c = cols; c && i < cmdname_cnt; i++) {
- printf("%s", cmdname[i]->name);
-
- if (--c)
- mput_char(' ', space - cmdname[i]->len);
+ for (j = 0; j < cols; j++) {
+ int n = j * rows + i;
+ int size = space;
+ if (n >= cmdname_cnt)
+ break;
+ if (j == cols-1 || n + rows >= cmdname_cnt)
+ size = 1;
+ printf("%-*s", size, cmdname[n]->name);
}
putchar('\n');
}
}
#ifdef __GNUC__
-static void usage(const char *exec_path, const char *fmt, ...)
+static void cmd_usage(const char *exec_path, const char *fmt, ...)
__attribute__((__format__(__printf__, 2, 3), __noreturn__));
#endif
-static void usage(const char *exec_path, const char *fmt, ...)
+static void cmd_usage(const char *exec_path, const char *fmt, ...)
{
if (fmt) {
va_list ap;
path_len = len + strlen(old_path) + 1;
path = malloc(path_len + 1);
- path[path_len + 1] = '\0';
memcpy(path, dir, len);
path[len] = ':';
execlp("man", "man", page, NULL);
}
-int main(int argc, char **argv, char **envp)
+static int cmd_version(int argc, char **argv, char **envp)
{
- char git_command[PATH_MAX + 1];
- char wd[PATH_MAX + 1];
- int i, len, show_help = 0;
- char *exec_path = getenv("GIT_EXEC_PATH");
-
- getcwd(wd, PATH_MAX);
-
- if (!exec_path)
- exec_path = GIT_EXEC_PATH;
+ printf("git version %s\n", GIT_VERSION);
+ return 0;
+}
- for (i = 1; i < argc; i++) {
- char *arg = argv[i];
+static int cmd_help(int argc, char **argv, char **envp)
+{
+ char *help_cmd = argv[1];
+ if (!help_cmd)
+ cmd_usage(git_exec_path(), NULL);
+ show_man_page(help_cmd);
+ return 0;
+}
- if (strncmp(arg, "--", 2))
- break;
+#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
- arg += 2;
+static void handle_internal_command(int argc, char **argv, char **envp)
+{
+ const char *cmd = argv[0];
+ static struct cmd_struct {
+ const char *cmd;
+ int (*fn)(int, char **, char **);
+ } commands[] = {
+ { "version", cmd_version },
+ { "help", cmd_help },
+ };
+ int i;
- if (!strncmp(arg, "exec-path", 9)) {
- arg += 9;
- if (*arg == '=')
- exec_path = arg + 1;
- else {
- puts(exec_path);
- exit(0);
- }
- }
- else if (!strcmp(arg, "version")) {
- printf("git version %s\n", GIT_VERSION);
- exit(0);
- }
- else if (!strcmp(arg, "help"))
- show_help = 1;
- else if (!show_help)
- usage(NULL, NULL);
+ for (i = 0; i < ARRAY_SIZE(commands); i++) {
+ struct cmd_struct *p = commands+i;
+ if (strcmp(p->cmd, cmd))
+ continue;
+ exit(p->fn(argc, argv, envp));
}
+}
- if (i >= argc || show_help) {
- if (i >= argc)
- usage(exec_path, NULL);
+int main(int argc, char **argv, char **envp)
+{
+ char *cmd = argv[0];
+ char *slash = strrchr(cmd, '/');
+ char git_command[PATH_MAX + 1];
+ const char *exec_path = NULL;
+
+ /*
+ * Take the basename of argv[0] as the command
+ * name, and the dirname as the default exec_path
+ * if it's an absolute path and we don't have
+ * anything better.
+ */
+ if (slash) {
+ *slash++ = 0;
+ if (*cmd == '/')
+ exec_path = cmd;
+ cmd = slash;
+ }
- show_man_page(argv[i]);
+ /*
+ * "git-xxxx" is the same as "git xxxx", but we obviously:
+ *
+ * - cannot take flags in between the "git" and the "xxxx".
+ * - cannot execute it externally (since it would just do
+ * the same thing over again)
+ *
+ * So we just directly call the internal command handler, and
+ * die if that one cannot handle it.
+ */
+ if (!strncmp(cmd, "git-", 4)) {
+ cmd += 4;
+ argv[0] = cmd;
+ handle_internal_command(argc, argv, envp);
+ die("cannot handle %s internally", cmd);
}
- if (*exec_path != '/') {
- if (!getcwd(git_command, sizeof(git_command))) {
- fprintf(stderr,
- "git: cannot determine current directory");
- exit(1);
- }
- len = strlen(git_command);
+ /* Default command: "help" */
+ cmd = "help";
- /* Trivial cleanup */
- while (!strncmp(exec_path, "./", 2)) {
- exec_path += 2;
- while (*exec_path == '/')
- exec_path++;
- }
- snprintf(git_command + len, sizeof(git_command) - len,
- "/%s", exec_path);
- }
- else
- strcpy(git_command, exec_path);
- len = strlen(git_command);
- prepend_to_path(git_command, len);
+ /* Look for flags.. */
+ while (argc > 1) {
+ cmd = *++argv;
+ argc--;
+
+ if (strncmp(cmd, "--", 2))
+ break;
- strncat(&git_command[len], "/git-", sizeof(git_command) - len);
- len += 5;
- strncat(&git_command[len], argv[i], sizeof(git_command) - len);
+ cmd += 2;
- if (access(git_command, X_OK))
- usage(exec_path, "'%s' is not a git-command", argv[i]);
+ /*
+ * For legacy reasons, the "version" and "help"
+ * commands can be written with "--" prepended
+ * to make them look like flags.
+ */
+ if (!strcmp(cmd, "help"))
+ break;
+ if (!strcmp(cmd, "version"))
+ break;
- /* execve() can only ever return if it fails */
- execve(git_command, &argv[i], envp);
- printf("Failed to run command '%s': %s\n", git_command, strerror(errno));
+ /*
+ * Check remaining flags (which by now must be
+ * "--exec-path", but maybe we will accept
+ * other arguments some day)
+ */
+ if (!strncmp(cmd, "exec-path", 9)) {
+ cmd += 9;
+ if (*cmd == '=') {
+ git_set_exec_path(cmd + 1);
+ continue;
+ }
+ puts(git_exec_path());
+ exit(0);
+ }
+ cmd_usage(NULL, NULL);
+ }
+ argv[0] = cmd;
+
+ /*
+ * We search for git commands in the following order:
+ * - git_exec_path()
+ * - the path of the "git" command if we could find it
+ * in $0
+ * - the regular PATH.
+ */
+ if (exec_path)
+ prepend_to_path(exec_path, strlen(exec_path));
+ exec_path = git_exec_path();
+ prepend_to_path(exec_path, strlen(exec_path));
+
+ /* See if it's an internal command */
+ handle_internal_command(argc, argv, envp);
+
+ /* .. then try the external ones */
+ execv_git_cmd(argv);
+
+ if (errno == ENOENT)
+ cmd_usage(exec_path, "'%s' is not a git-command", cmd);
+
+ fprintf(stderr, "Failed to run command '%s': %s\n",
+ git_command, strerror(errno));
return 1;
}