#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
-#include <glob.h>
+#include <sys/ioctl.h>
+#include "git-compat-util.h"
+#include "exec_cmd.h"
+#include "common-cmds.h"
+
+#include "cache.h"
+#include "commit.h"
+#include "diff.h"
+#include "revision.h"
+#include "log-tree.h"
#ifndef PATH_MAX
# define PATH_MAX 4096
static const char git_usage[] =
"Usage: git [--version] [--exec-path[=GIT_EXEC_PATH]] [--help] COMMAND [ ARGS ]";
-struct string_list {
- size_t len;
- char *str;
- struct string_list *next;
-};
-
/* most gui terms set COLUMNS (although some don't export it) */
static int term_columns(void)
{
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 oom(void)
+{
+ fprintf(stderr, "git: out of memory\n");
+ exit(1);
+}
+
static inline void mput_char(char c, unsigned int num)
{
while(num--)
putchar(c);
}
-static void pretty_print_string_list(struct string_list *list, int longest)
+static struct cmdname {
+ size_t len;
+ char name[1];
+} **cmdname;
+static int cmdname_alloc, cmdname_cnt;
+
+static void add_cmdname(const char *name, int len)
{
- int cols = 1;
+ struct cmdname *ent;
+ if (cmdname_alloc <= cmdname_cnt) {
+ cmdname_alloc = cmdname_alloc + 200;
+ cmdname = realloc(cmdname, cmdname_alloc * sizeof(*cmdname));
+ if (!cmdname)
+ oom();
+ }
+ ent = malloc(sizeof(*ent) + len);
+ if (!ent)
+ oom();
+ ent->len = len;
+ memcpy(ent->name, name, len);
+ ent->name[len] = 0;
+ cmdname[cmdname_cnt++] = ent;
+}
+
+static int cmdname_compare(const void *a_, const void *b_)
+{
+ struct cmdname *a = *(struct cmdname **)a_;
+ struct cmdname *b = *(struct cmdname **)b_;
+ return strcmp(a->name, b->name);
+}
+
+static void pretty_print_string_list(struct cmdname **cmdname, int longest)
+{
+ 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, j;
if (space < max_cols)
cols = max_cols / space;
+ rows = (cmdname_cnt + cols - 1) / cols;
- while (list) {
- int c;
- printf(" ");
+ qsort(cmdname, cmdname_cnt, sizeof(*cmdname), cmdname_compare);
- for (c = cols; c && list; list = list->next) {
- printf("%s", list->str);
+ for (i = 0; i < rows; i++) {
+ printf(" ");
- if (--c)
- mput_char(' ', space - list->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');
}
static void list_commands(const char *exec_path, const char *pattern)
{
- struct string_list *list = NULL, *tail = NULL;
- unsigned int longest = 0, i;
- glob_t gl;
-
- if (chdir(exec_path) < 0) {
- printf("git: '%s': %s\n", exec_path, strerror(errno));
+ unsigned int longest = 0;
+ char path[PATH_MAX];
+ int dirlen;
+ DIR *dir = opendir(exec_path);
+ struct dirent *de;
+
+ if (!dir) {
+ fprintf(stderr, "git: '%s': %s\n", exec_path, strerror(errno));
exit(1);
}
- i = glob(pattern, 0, NULL, &gl);
- switch(i) {
- case GLOB_NOSPACE:
- puts("Out of memory when running glob()");
- exit(2);
- case GLOB_ABORTED:
- printf("'%s': Read error: %s\n", exec_path, strerror(errno));
- exit(2);
- case GLOB_NOMATCH:
- printf("No git commands available in '%s'.\n", exec_path);
- printf("Do you need to specify --exec-path or set GIT_EXEC_PATH?\n");
+ dirlen = strlen(exec_path);
+ if (PATH_MAX - 20 < dirlen) {
+ fprintf(stderr, "git: insanely long exec-path '%s'\n",
+ exec_path);
exit(1);
}
- for (i = 0; i < gl.gl_pathc; i++) {
- int len = strlen(gl.gl_pathv[i] + 4);
+ memcpy(path, exec_path, dirlen);
+ path[dirlen++] = '/';
+
+ while ((de = readdir(dir)) != NULL) {
+ struct stat st;
+ int entlen;
- if (access(gl.gl_pathv[i], X_OK))
+ if (strncmp(de->d_name, "git-", 4))
+ continue;
+ strcpy(path+dirlen, de->d_name);
+ if (stat(path, &st) || /* stat, not lstat */
+ !S_ISREG(st.st_mode) ||
+ !(st.st_mode & S_IXUSR))
continue;
- if (longest < len)
- longest = len;
+ entlen = strlen(de->d_name);
+ if (4 < entlen && !strcmp(de->d_name + entlen - 4, ".exe"))
+ entlen -= 4;
- if (!tail)
- tail = list = malloc(sizeof(struct string_list));
- else {
- tail->next = malloc(sizeof(struct string_list));
- tail = tail->next;
- }
- tail->len = len;
- tail->str = gl.gl_pathv[i] + 4;
- tail->next = NULL;
+ if (longest < entlen)
+ longest = entlen;
+
+ add_cmdname(de->d_name + 4, entlen-4);
}
+ closedir(dir);
printf("git commands available in '%s'\n", exec_path);
printf("----------------------------");
mput_char('-', strlen(exec_path));
putchar('\n');
- pretty_print_string_list(list, longest);
+ pretty_print_string_list(cmdname, longest - 4);
putchar('\n');
}
+static void list_common_cmds_help(void)
+{
+ int i, longest = 0;
+
+ for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
+ if (longest < strlen(common_cmds[i].name))
+ longest = strlen(common_cmds[i].name);
+ }
+
+ puts("The most commonly used git commands are:");
+ for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
+ printf(" %s", common_cmds[i].name);
+ mput_char(' ', longest - strlen(common_cmds[i].name) + 4);
+ puts(common_cmds[i].help);
+ }
+ puts("(use 'git help -a' to get a list of all installed git commands)");
+}
+
#ifdef __GNUC__
-static void usage(const char *exec_path, const char *fmt, ...)
- __attribute__((__format__(__printf__, 2, 3), __noreturn__));
+static void cmd_usage(int show_all, const char *exec_path, const char *fmt, ...)
+ __attribute__((__format__(__printf__, 3, 4), __noreturn__));
#endif
-static void usage(const char *exec_path, const char *fmt, ...)
+static void cmd_usage(int show_all, const char *exec_path, const char *fmt, ...)
{
if (fmt) {
va_list ap;
else
puts(git_usage);
- putchar('\n');
-
- if(exec_path)
- list_commands(exec_path, "git-*");
+ if (exec_path) {
+ putchar('\n');
+ if (show_all)
+ list_commands(exec_path, "git-*");
+ else
+ list_common_cmds_help();
+ }
exit(1);
}
int path_len = len;
if (!old_path)
- old_path = "/bin:/usr/bin:.";
+ old_path = "/usr/local/bin:/usr/bin:/bin";
path_len = len + strlen(old_path) + 1;
path = malloc(path_len + 1);
- path[path_len + 1] = '\0';
memcpy(path, dir, len);
path[len] = ':';
setenv("PATH", path, 1);
}
-/* has anyone seen 'man' installed anywhere else than in /usr/bin? */
-#define PATH_TO_MAN "/usr/bin/man"
-static void show_man_page(char *git_cmd)
+static void show_man_page(const char *git_cmd)
{
- char *page;
+ const char *page;
if (!strncmp(git_cmd, "git", 3))
page = git_cmd;
else {
int page_len = strlen(git_cmd) + 4;
-
- page = malloc(page_len + 1);
- strcpy(page, "git-");
- strcpy(page + 4, git_cmd);
- page[page_len] = 0;
+ char *p = malloc(page_len + 1);
+ strcpy(p, "git-");
+ strcpy(p + 4, git_cmd);
+ p[page_len] = 0;
+ page = p;
}
- execlp(PATH_TO_MAN, "man", page, NULL);
+ execlp("man", "man", page, NULL);
}
-int main(int argc, char **argv, char **envp)
+static int cmd_version(int argc, const 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");
+ printf("git version %s\n", GIT_VERSION);
+ return 0;
+}
- getcwd(wd, PATH_MAX);
+static int cmd_help(int argc, const char **argv, char **envp)
+{
+ const char *help_cmd = argv[1];
+ if (!help_cmd)
+ cmd_usage(0, git_exec_path(), NULL);
+ else if (!strcmp(help_cmd, "--all") || !strcmp(help_cmd, "-a"))
+ cmd_usage(1, git_exec_path(), NULL);
+ else
+ show_man_page(help_cmd);
+ return 0;
+}
- if (!exec_path)
- exec_path = GIT_EXEC_PATH;
+#define LOGSIZE (65536)
- for (i = 1; i < argc; i++) {
- char *arg = argv[i];
+static int cmd_log(int argc, const char **argv, char **envp)
+{
+ struct rev_info rev;
+ struct commit *commit;
+ char *buf = xmalloc(LOGSIZE);
+ static enum cmit_fmt commit_format = CMIT_FMT_DEFAULT;
+ int abbrev = DEFAULT_ABBREV;
+ int abbrev_commit = 0;
+ const char *commit_prefix = "commit ";
+ struct log_tree_opt opt;
+ int shown = 0;
+ int do_diff = 0;
+ int full_diff = 0;
+
+ init_log_tree_opt(&opt);
+ argc = setup_revisions(argc, argv, &rev, "HEAD");
+ while (1 < argc) {
+ const char *arg = argv[1];
+ if (!strncmp(arg, "--pretty", 8)) {
+ commit_format = get_commit_format(arg + 8);
+ if (commit_format == CMIT_FMT_ONELINE)
+ commit_prefix = "";
+ }
+ else if (!strcmp(arg, "--no-abbrev")) {
+ abbrev = 0;
+ }
+ else if (!strcmp(arg, "--abbrev")) {
+ abbrev = DEFAULT_ABBREV;
+ }
+ else if (!strcmp(arg, "--abbrev-commit")) {
+ abbrev_commit = 1;
+ }
+ else if (!strncmp(arg, "--abbrev=", 9)) {
+ abbrev = strtoul(arg + 9, NULL, 10);
+ if (abbrev && abbrev < MINIMUM_ABBREV)
+ abbrev = MINIMUM_ABBREV;
+ else if (40 < abbrev)
+ abbrev = 40;
+ }
+ else if (!strcmp(arg, "--full-diff")) {
+ do_diff = 1;
+ full_diff = 1;
+ }
+ else {
+ int cnt = log_tree_opt_parse(&opt, argv+1, argc-1);
+ if (0 < cnt) {
+ do_diff = 1;
+ argv += cnt;
+ argc -= cnt;
+ continue;
+ }
+ die("unrecognized argument: %s", arg);
+ }
- if (strncmp(arg, "--", 2))
- break;
+ argc--; argv++;
+ }
- arg += 2;
+ if (do_diff) {
+ opt.diffopt.abbrev = abbrev;
+ opt.verbose_header = 0;
+ opt.always_show_header = 0;
+ opt.no_commit_id = 1;
+ if (opt.combine_merges)
+ opt.ignore_merges = 0;
+ if (opt.dense_combined_merges)
+ opt.diffopt.output_format = DIFF_FORMAT_PATCH;
+ if (opt.diffopt.output_format == DIFF_FORMAT_PATCH)
+ opt.diffopt.recursive = 1;
+ if (!full_diff && rev.prune_data)
+ diff_tree_setup_paths(rev.prune_data, &opt.diffopt);
+ diff_setup_done(&opt.diffopt);
+ }
- if (!strncmp(arg, "exec-path", 9)) {
- arg += 9;
- if (*arg == '=')
- exec_path = arg + 1;
- else {
- puts(exec_path);
- exit(0);
+ prepare_revision_walk(&rev);
+ setup_pager();
+ while ((commit = get_revision(&rev)) != NULL) {
+ if (shown && do_diff && commit_format != CMIT_FMT_ONELINE)
+ putchar('\n');
+ fputs(commit_prefix, stdout);
+ if (abbrev_commit && abbrev)
+ fputs(find_unique_abbrev(commit->object.sha1, abbrev),
+ stdout);
+ else
+ fputs(sha1_to_hex(commit->object.sha1), stdout);
+ if (rev.parents) {
+ struct commit_list *parents = commit->parents;
+ while (parents) {
+ struct object *o = &(parents->item->object);
+ parents = parents->next;
+ if (o->flags & TMP_MARK)
+ continue;
+ printf(" %s", sha1_to_hex(o->sha1));
+ o->flags |= TMP_MARK;
}
+ /* TMP_MARK is a general purpose flag that can
+ * be used locally, but the user should clean
+ * things up after it is done with them.
+ */
+ for (parents = commit->parents;
+ parents;
+ parents = parents->next)
+ parents->item->object.flags &= ~TMP_MARK;
}
- 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);
+ if (commit_format == CMIT_FMT_ONELINE)
+ putchar(' ');
+ else
+ putchar('\n');
+ pretty_print_commit(commit_format, commit, ~0, buf,
+ LOGSIZE, abbrev);
+ printf("%s\n", buf);
+ if (do_diff)
+ log_tree_commit(&opt, commit);
+ shown = 1;
+ free(commit->buffer);
+ commit->buffer = NULL;
}
+ free(buf);
+ return 0;
+}
- if (i >= argc || show_help) {
- if (i >= argc)
- usage(exec_path, NULL);
+static void handle_internal_command(int argc, const char **argv, char **envp)
+{
+ const char *cmd = argv[0];
+ static struct cmd_struct {
+ const char *cmd;
+ int (*fn)(int, const char **, char **);
+ } commands[] = {
+ { "version", cmd_version },
+ { "help", cmd_help },
+ { "log", cmd_log },
+ };
+ int i;
+
+ 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));
+ }
+}
- show_man_page(argv[i]);
+int main(int argc, const char **argv, char **envp)
+{
+ const 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;
}
- /* allow relative paths, but run with exact */
- if (chdir(exec_path)) {
- printf("git: '%s': %s\n", exec_path, strerror(errno));
- exit (1);
+ /*
+ * "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);
}
- getcwd(git_command, sizeof(git_command));
- chdir(wd);
+ /* Default command: "help" */
+ cmd = "help";
+
+ /* Look for flags.. */
+ while (argc > 1) {
+ cmd = *++argv;
+ argc--;
- len = strlen(git_command);
- prepend_to_path(git_command, len);
+ 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(0, 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(0, exec_path, "'%s' is not a git-command", cmd);
+
+ fprintf(stderr, "Failed to run command '%s': %s\n",
+ git_command, strerror(errno));
return 1;
}