-#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 "git-compat-util.h"
+#include "builtin.h"
#include "exec_cmd.h"
#include "cache.h"
+#include "quote.h"
-#include "builtin.h"
+const char git_usage_string[] =
+ "git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate|--no-pager] [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE] [--help] COMMAND [ARGS]";
static void prepend_to_path(const char *dir, int len)
{
path_len = len + strlen(old_path) + 1;
- path = malloc(path_len + 1);
+ path = xmalloc(path_len + 1);
memcpy(path, dir, len);
path[len] = ':';
memcpy(path + len + 1, old_path, path_len - len);
setenv("PATH", path, 1);
+
+ free(path);
+}
+
+static int handle_options(const char*** argv, int* argc, int* envchanged)
+{
+ int handled = 0;
+
+ while (*argc > 0) {
+ const char *cmd = (*argv)[0];
+ if (cmd[0] != '-')
+ break;
+
+ /*
+ * For legacy reasons, the "version" and "help"
+ * commands can be written with "--" prepended
+ * to make them look like flags.
+ */
+ if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
+ break;
+
+ /*
+ * Check remaining flags.
+ */
+ if (!prefixcmp(cmd, "--exec-path")) {
+ cmd += 11;
+ if (*cmd == '=')
+ git_set_exec_path(cmd + 1);
+ else {
+ puts(git_exec_path());
+ exit(0);
+ }
+ } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
+ setup_pager();
+ } else if (!strcmp(cmd, "--no-pager")) {
+ setenv("GIT_PAGER", "cat", 1);
+ if (envchanged)
+ *envchanged = 1;
+ } else if (!strcmp(cmd, "--git-dir")) {
+ if (*argc < 2) {
+ fprintf(stderr, "No directory given for --git-dir.\n" );
+ usage(git_usage_string);
+ }
+ setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
+ if (envchanged)
+ *envchanged = 1;
+ (*argv)++;
+ (*argc)--;
+ handled++;
+ } else if (!prefixcmp(cmd, "--git-dir=")) {
+ setenv(GIT_DIR_ENVIRONMENT, cmd + 10, 1);
+ if (envchanged)
+ *envchanged = 1;
+ } else if (!strcmp(cmd, "--work-tree")) {
+ if (*argc < 2) {
+ fprintf(stderr, "No directory given for --work-tree.\n" );
+ usage(git_usage_string);
+ }
+ setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
+ if (envchanged)
+ *envchanged = 1;
+ (*argv)++;
+ (*argc)--;
+ } else if (!prefixcmp(cmd, "--work-tree=")) {
+ setenv(GIT_WORK_TREE_ENVIRONMENT, cmd + 12, 1);
+ if (envchanged)
+ *envchanged = 1;
+ } else if (!strcmp(cmd, "--bare")) {
+ static char git_dir[PATH_MAX+1];
+ is_bare_repository_cfg = 1;
+ setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 0);
+ if (envchanged)
+ *envchanged = 1;
+ } else {
+ fprintf(stderr, "Unknown option: %s\n", cmd);
+ usage(git_usage_string);
+ }
+
+ (*argv)++;
+ (*argc)--;
+ handled++;
+ }
+ return handled;
}
static const char *alias_command;
-static char *alias_string = NULL;
+static char *alias_string;
static int git_alias_config(const char *var, const char *value)
{
- if (!strncmp(var, "alias.", 6) && !strcmp(var + 6, alias_command)) {
- alias_string = strdup(value);
+ if (!prefixcmp(var, "alias.") && !strcmp(var + 6, alias_command)) {
+ alias_string = xstrdup(value);
}
return 0;
}
int src, dst, count = 0, size = 16;
char quoted = 0;
- *argv = malloc(sizeof(char*) * size);
+ *argv = xmalloc(sizeof(char*) * size);
/* split alias_string */
(*argv)[count++] = cmdline;
; /* skip */
if (count >= size) {
size += 16;
- *argv = realloc(*argv, sizeof(char*) * size);
+ *argv = xrealloc(*argv, sizeof(char*) * size);
}
(*argv)[count++] = cmdline + dst;
} else if(!quoted && (c == '\'' || c == '"')) {
static int handle_alias(int *argcp, const char ***argv)
{
- int nongit = 0, ret = 0, saved_errno = errno;
+ int nongit = 0, envchanged = 0, ret = 0, saved_errno = errno;
const char *subdir;
+ int count, option_count;
+ const char** new_argv;
subdir = setup_git_directory_gently(&nongit);
- if (!nongit) {
- int count;
- const char** new_argv;
-
- alias_command = (*argv)[0];
- git_config(git_alias_config);
- if (alias_string) {
-
- count = split_cmdline(alias_string, &new_argv);
-
- if (count < 1)
- die("empty alias for %s", alias_command);
- if (!strcmp(alias_command, new_argv[0]))
- die("recursive alias: %s", alias_command);
-
- /* insert after command name */
+ alias_command = (*argv)[0];
+ git_config(git_alias_config);
+ if (alias_string) {
+ if (alias_string[0] == '!') {
if (*argcp > 1) {
- new_argv = realloc(new_argv, sizeof(char*) *
- (count + *argcp));
- memcpy(new_argv + count, *argv + 1,
- sizeof(char*) * *argcp);
+ int i, sz = PATH_MAX;
+ char *s = xmalloc(sz), *new_alias = s;
+
+ add_to_string(&s, &sz, alias_string, 0);
+ free(alias_string);
+ alias_string = new_alias;
+ for (i = 1; i < *argcp &&
+ !add_to_string(&s, &sz, " ", 0) &&
+ !add_to_string(&s, &sz, (*argv)[i], 1)
+ ; i++)
+ ; /* do nothing */
+ if (!sz)
+ die("Too many or long arguments");
}
-
- *argv = new_argv;
- *argcp += count - 1;
-
- ret = 1;
+ trace_printf("trace: alias to shell cmd: %s => %s\n",
+ alias_command, alias_string + 1);
+ ret = system(alias_string + 1);
+ if (ret >= 0 && WIFEXITED(ret) &&
+ WEXITSTATUS(ret) != 127)
+ exit(WEXITSTATUS(ret));
+ die("Failed to run '%s' when expanding alias '%s'\n",
+ alias_string + 1, alias_command);
}
+ count = split_cmdline(alias_string, &new_argv);
+ option_count = handle_options(&new_argv, &count, &envchanged);
+ if (envchanged)
+ die("alias '%s' changes environment variables\n"
+ "You can use '!git' in the alias to do this.",
+ alias_command);
+ memmove(new_argv - option_count, new_argv,
+ count * sizeof(char *));
+ new_argv -= option_count;
+
+ if (count < 1)
+ die("empty alias for %s", alias_command);
+
+ if (!strcmp(alias_command, new_argv[0]))
+ die("recursive alias: %s", alias_command);
+
+ trace_argv_printf(new_argv, count,
+ "trace: alias expansion: %s =>",
+ alias_command);
+
+ new_argv = xrealloc(new_argv, sizeof(char*) *
+ (count + *argcp + 1));
+ /* insert after command name */
+ memcpy(new_argv + count, *argv + 1, sizeof(char*) * *argcp);
+ new_argv[count+*argcp] = NULL;
+
+ *argv = new_argv;
+ *argcp += count - 1;
+
+ ret = 1;
}
if (subdir)
const char git_version_string[] = GIT_VERSION;
-static void handle_internal_command(int argc, const char **argv, char **envp)
+#define RUN_SETUP (1<<0)
+#define USE_PAGER (1<<1)
+/*
+ * require working tree to be present -- anything uses this needs
+ * RUN_SETUP for reading from the configuration file.
+ */
+#define NEED_WORK_TREE (1<<2)
+
+struct cmd_struct {
+ const char *cmd;
+ int (*fn)(int, const char **, const char *);
+ int option;
+};
+
+static int run_command(struct cmd_struct *p, int argc, const char **argv)
+{
+ int status;
+ struct stat st;
+ const char *prefix;
+
+ prefix = NULL;
+ if (p->option & RUN_SETUP)
+ prefix = setup_git_directory();
+ if (p->option & USE_PAGER)
+ setup_pager();
+ if (p->option & NEED_WORK_TREE) {
+ const char *work_tree = get_git_work_tree();
+ const char *git_dir = get_git_dir();
+ if (!is_absolute_path(git_dir))
+ set_git_dir(make_absolute_path(git_dir));
+ if (!work_tree || chdir(work_tree))
+ die("%s must be run in a work tree", p->cmd);
+ }
+ trace_argv_printf(argv, argc, "trace: built-in: git");
+
+ status = p->fn(argc, argv, prefix);
+ if (status)
+ return status;
+
+ /* Somebody closed stdout? */
+ if (fstat(fileno(stdout), &st))
+ return 0;
+ /* Ignore write errors for pipes and sockets.. */
+ if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
+ return 0;
+
+ /* Check for ENOSPC and EIO errors.. */
+ if (fflush(stdout))
+ die("write failure on standard output: %s", strerror(errno));
+ if (ferror(stdout))
+ die("unknown write failure on standard output");
+ if (fclose(stdout))
+ die("close failed on standard output: %s", strerror(errno));
+ return 0;
+}
+
+static void handle_internal_command(int argc, const char **argv)
{
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 },
- { "whatchanged", cmd_whatchanged },
- { "show", cmd_show },
- { "push", cmd_push },
- { "format-patch", cmd_format_patch },
- { "count-objects", cmd_count_objects },
- { "diff", cmd_diff },
- { "grep", cmd_grep },
- { "rm", cmd_rm },
- { "add", cmd_add },
- { "rev-list", cmd_rev_list },
- { "init-db", cmd_init_db },
- { "get-tar-commit-id", cmd_get_tar_commit_id },
- { "upload-tar", cmd_upload_tar },
- { "check-ref-format", cmd_check_ref_format },
- { "ls-files", cmd_ls_files },
- { "ls-tree", cmd_ls_tree },
- { "tar-tree", cmd_tar_tree },
- { "read-tree", cmd_read_tree },
- { "commit-tree", cmd_commit_tree },
+ static struct cmd_struct commands[] = {
+ { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
+ { "annotate", cmd_annotate, RUN_SETUP },
{ "apply", cmd_apply },
- { "show-branch", cmd_show_branch },
+ { "archive", cmd_archive },
+ { "blame", cmd_blame, RUN_SETUP },
+ { "branch", cmd_branch, RUN_SETUP },
+ { "bundle", cmd_bundle },
+ { "cat-file", cmd_cat_file, RUN_SETUP },
+ { "checkout-index", cmd_checkout_index,
+ RUN_SETUP | NEED_WORK_TREE},
+ { "check-ref-format", cmd_check_ref_format },
+ { "check-attr", cmd_check_attr, RUN_SETUP | NEED_WORK_TREE },
+ { "cherry", cmd_cherry, RUN_SETUP },
+ { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
+ { "commit-tree", cmd_commit_tree, RUN_SETUP },
+ { "config", cmd_config },
+ { "count-objects", cmd_count_objects, RUN_SETUP },
+ { "describe", cmd_describe, RUN_SETUP },
+ { "diff", cmd_diff },
{ "diff-files", cmd_diff_files },
- { "diff-index", cmd_diff_index },
- { "diff-stages", cmd_diff_stages },
- { "diff-tree", cmd_diff_tree },
- { "cat-file", cmd_cat_file },
- { "rev-parse", cmd_rev_parse },
- { "write-tree", cmd_write_tree },
- { "mailsplit", cmd_mailsplit },
+ { "diff-index", cmd_diff_index, RUN_SETUP },
+ { "diff-tree", cmd_diff_tree, RUN_SETUP },
+ { "fetch--tool", cmd_fetch__tool, RUN_SETUP },
+ { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
+ { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
+ { "format-patch", cmd_format_patch, RUN_SETUP },
+ { "fsck", cmd_fsck, RUN_SETUP },
+ { "fsck-objects", cmd_fsck, RUN_SETUP },
+ { "gc", cmd_gc, RUN_SETUP },
+ { "get-tar-commit-id", cmd_get_tar_commit_id },
+ { "grep", cmd_grep, RUN_SETUP | USE_PAGER },
+ { "help", cmd_help },
+ { "init", cmd_init_db },
+ { "init-db", cmd_init_db },
+ { "log", cmd_log, RUN_SETUP | USE_PAGER },
+ { "ls-files", cmd_ls_files, RUN_SETUP },
+ { "ls-tree", cmd_ls_tree, RUN_SETUP },
{ "mailinfo", cmd_mailinfo },
+ { "mailsplit", cmd_mailsplit },
+ { "merge-base", cmd_merge_base, RUN_SETUP },
+ { "merge-file", cmd_merge_file },
+ { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
+ { "name-rev", cmd_name_rev, RUN_SETUP },
+ { "pack-objects", cmd_pack_objects, RUN_SETUP },
+ { "pickaxe", cmd_blame, RUN_SETUP },
+ { "prune", cmd_prune, RUN_SETUP },
+ { "prune-packed", cmd_prune_packed, RUN_SETUP },
+ { "push", cmd_push, RUN_SETUP },
+ { "read-tree", cmd_read_tree, RUN_SETUP },
+ { "reflog", cmd_reflog, RUN_SETUP },
+ { "repo-config", cmd_config },
+ { "rerere", cmd_rerere, RUN_SETUP },
+ { "rev-list", cmd_rev_list, RUN_SETUP },
+ { "rev-parse", cmd_rev_parse, RUN_SETUP },
+ { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
+ { "rm", cmd_rm, RUN_SETUP | NEED_WORK_TREE },
+ { "runstatus", cmd_runstatus, RUN_SETUP | NEED_WORK_TREE },
+ { "shortlog", cmd_shortlog, RUN_SETUP | USE_PAGER },
+ { "show-branch", cmd_show_branch, RUN_SETUP },
+ { "show", cmd_show, RUN_SETUP | USE_PAGER },
{ "stripspace", cmd_stripspace },
- { "update-index", cmd_update_index },
- { "update-ref", cmd_update_ref },
- { "fmt-merge-msg", cmd_fmt_merge_msg }
+ { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
+ { "tag", cmd_tag, RUN_SETUP },
+ { "tar-tree", cmd_tar_tree },
+ { "unpack-objects", cmd_unpack_objects, RUN_SETUP },
+ { "update-index", cmd_update_index, RUN_SETUP },
+ { "update-ref", cmd_update_ref, RUN_SETUP },
+ { "upload-archive", cmd_upload_archive },
+ { "verify-tag", cmd_verify_tag, RUN_SETUP },
+ { "version", cmd_version },
+ { "whatchanged", cmd_whatchanged, RUN_SETUP | USE_PAGER },
+ { "write-tree", cmd_write_tree, RUN_SETUP },
+ { "verify-pack", cmd_verify_pack },
+ { "show-ref", cmd_show_ref, RUN_SETUP },
+ { "pack-refs", cmd_pack_refs, RUN_SETUP },
};
int i;
struct cmd_struct *p = commands+i;
if (strcmp(p->cmd, cmd))
continue;
- exit(p->fn(argc, argv, envp));
+ exit(run_command(p, argc, argv));
}
}
-int main(int argc, const char **argv, char **envp)
+int main(int argc, const char **argv)
{
- const char *cmd = argv[0];
+ const char *cmd = argv[0] ? argv[0] : "git-help";
char *slash = strrchr(cmd, '/');
const char *exec_path = NULL;
int done_alias = 0;
* So we just directly call the internal command handler, and
* die if that one cannot handle it.
*/
- if (!strncmp(cmd, "git-", 4)) {
+ if (!prefixcmp(cmd, "git-")) {
cmd += 4;
argv[0] = cmd;
- handle_internal_command(argc, argv, envp);
+ handle_internal_command(argc, argv);
die("cannot handle %s internally", cmd);
}
- /* Default command: "help" */
- cmd = "help";
-
/* Look for flags.. */
- while (argc > 1) {
- cmd = *++argv;
- argc--;
-
- if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
- setup_pager();
- continue;
- }
-
- if (strncmp(cmd, "--", 2))
- break;
-
- cmd += 2;
-
- /*
- * 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;
-
- /*
- * 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++;
+ argc--;
+ handle_options(&argv, &argc, NULL);
+ if (argc > 0) {
+ if (!prefixcmp(argv[0], "--"))
+ argv[0] += 2;
+ } else {
+ /* Default command: "help" */
+ argv[0] = "help";
+ argc = 1;
}
- argv[0] = cmd;
+ cmd = argv[0];
/*
- * 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.
+ * We execute external git command via execv_git_cmd(),
+ * which looks at "--exec-path" option, GIT_EXEC_PATH
+ * environment, and $(gitexecdir) in Makefile while built,
+ * in this order. For scripted commands, we prepend
+ * the value of the exec_path variable to the PATH.
*/
if (exec_path)
prepend_to_path(exec_path, strlen(exec_path));
while (1) {
/* See if it's an internal command */
- handle_internal_command(argc, argv, envp);
+ handle_internal_command(argc, argv);
/* .. then try the external ones */
execv_git_cmd(argv);
done_alias = 1;
}
- if (errno == ENOENT)
- cmd_usage(0, exec_path, "'%s' is not a git-command", cmd);
+ if (errno == ENOENT) {
+ if (done_alias) {
+ fprintf(stderr, "Expansion of alias '%s' failed; "
+ "'%s' is not a git-command\n",
+ cmd, argv[0]);
+ exit(1);
+ }
+ help_unknown_cmd(cmd);
+ }
fprintf(stderr, "Failed to run command '%s': %s\n",
cmd, strerror(errno));