GIT 0.99.9j aka 1.0rc3v1.0rc3v0.99.9j

Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 295 insertions, 0 deletions

diff --git a/git.c b/git.c
new file mode 100644
index 0000000000..b9b8c62f47
--- /dev/null
+++ b/git.c
@@ -0,0 +1,295 @@
+#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>
+
+#ifndef PATH_MAX
+# define PATH_MAX 4096
+#endif
+
+static const char git_usage[] =
+	"Usage: git [--version] [--exec-path[=GIT_EXEC_PATH]] [--help] COMMAND [ ARGS ]";
+
+/* most gui terms set COLUMNS (although some don't export it) */
+static int term_columns(void)
+{
+	char *col_string = getenv("COLUMNS");
+	int n_cols = 0;
+
+	if (col_string && (n_cols = atoi(col_string)) > 0)
+		return n_cols;
+
+	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 struct cmdname {
+	size_t len;
+	char name[1];
+} **cmdname;
+static int cmdname_alloc, cmdname_cnt;
+
+static void add_cmdname(const char *name, int len)
+{
+	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+1);
+	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;
+	int space = longest + 1; /* min 1 SP between words */
+	int max_cols = term_columns() - 1; /* don't print *on* the edge */
+	int i;
+
+	if (space < max_cols)
+		cols = max_cols / space;
+
+	qsort(cmdname, cmdname_cnt, sizeof(*cmdname), cmdname_compare);
+
+	for (i = 0; i < cmdname_cnt; ) {
+		int c;
+		printf("  ");
+
+		for (c = cols; c && i < cmdname_cnt; i++) {
+			printf("%s", cmdname[i]->name);
+
+			if (--c)
+				mput_char(' ', space - cmdname[i]->len);
+		}
+		putchar('\n');
+	}
+}
+
+static void list_commands(const char *exec_path, const char *pattern)
+{
+	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);
+	}
+
+	dirlen = strlen(exec_path);
+	if (PATH_MAX - 20 < dirlen) {
+		fprintf(stderr, "git: insanely long exec-path '%s'\n",
+			exec_path);
+		exit(1);
+	}
+
+	memcpy(path, exec_path, dirlen);
+	path[dirlen++] = '/';
+
+	while ((de = readdir(dir)) != NULL) {
+		struct stat st;
+		int entlen;
+
+		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;
+
+		entlen = strlen(de->d_name);
+
+		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(cmdname, longest - 4);
+	putchar('\n');
+}
+
+#ifdef __GNUC__
+static void 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, ...)
+{
+	if (fmt) {
+		va_list ap;
+
+		va_start(ap, fmt);
+		printf("git: ");
+		vprintf(fmt, ap);
+		va_end(ap);
+		putchar('\n');
+	}
+	else
+		puts(git_usage);
+
+	putchar('\n');
+
+	if(exec_path)
+		list_commands(exec_path, "git-*");
+
+	exit(1);
+}
+
+static void prepend_to_path(const char *dir, int len)
+{
+	char *path, *old_path = getenv("PATH");
+	int path_len = len;
+
+	if (!old_path)
+		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] = ':';
+	memcpy(path + len + 1, old_path, path_len - len);
+
+	setenv("PATH", path, 1);
+}
+
+static void show_man_page(char *git_cmd)
+{
+	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;
+	}
+
+	execlp("man", "man", page, NULL);
+}
+
+int main(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;
+
+	for (i = 1; i < argc; i++) {
+		char *arg = argv[i];
+
+		if (strncmp(arg, "--", 2))
+			break;
+
+		arg += 2;
+
+		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);
+	}
+
+	if (i >= argc || show_help) {
+		if (i >= argc)
+			usage(exec_path, NULL);
+
+		show_man_page(argv[i]);
+	}
+
+	if (*exec_path != '/') {
+		if (!getcwd(git_command, sizeof(git_command))) {
+			fprintf(stderr,
+				"git: cannot determine current directory");
+			exit(1);
+		}
+		len = strlen(git_command);
+
+		/* 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);
+
+	strncat(&git_command[len], "/git-", sizeof(git_command) - len);
+	len += 5;
+	strncat(&git_command[len], argv[i], sizeof(git_command) - len);
+
+	if (access(git_command, X_OK))
+		usage(exec_path, "'%s' is not a git-command", argv[i]);
+
+	/* 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));
+
+	return 1;
+}