| #include "builtin.h" |
| #include "cache.h" |
| #include "exec_cmd.h" |
| #include "help.h" |
| #include "quote.h" |
| #include "run-command.h" |
| |
| const char git_usage_string[] = |
| "git [--version] [--exec-path[=<path>]] [--html-path]\n" |
| " [-p|--paginate|--no-pager] [--no-replace-objects]\n" |
| " [--bare] [--git-dir=<path>] [--work-tree=<path>]\n" |
| " [-c name=value] [--help]\n" |
| " <command> [<args>]"; |
| |
| const char git_more_info_string[] = |
| "See 'git help <command>' for more information on a specific command."; |
| |
| static struct startup_info git_startup_info; |
| static int use_pager = -1; |
| struct pager_config { |
| const char *cmd; |
| int want; |
| char *value; |
| }; |
| |
| static int pager_command_config(const char *var, const char *value, void *data) |
| { |
| struct pager_config *c = data; |
| if (!prefixcmp(var, "pager.") && !strcmp(var + 6, c->cmd)) { |
| int b = git_config_maybe_bool(var, value); |
| if (b >= 0) |
| c->want = b; |
| else { |
| c->want = 1; |
| c->value = xstrdup(value); |
| } |
| } |
| return 0; |
| } |
| |
| /* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */ |
| int check_pager_config(const char *cmd) |
| { |
| struct pager_config c; |
| c.cmd = cmd; |
| c.want = -1; |
| c.value = NULL; |
| git_config(pager_command_config, &c); |
| if (c.value) |
| pager_program = c.value; |
| return c.want; |
| } |
| |
| static void commit_pager_choice(void) { |
| switch (use_pager) { |
| case 0: |
| setenv("GIT_PAGER", "cat", 1); |
| break; |
| case 1: |
| setup_pager(); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| 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_argv_exec_path(cmd + 1); |
| else { |
| puts(git_exec_path()); |
| exit(0); |
| } |
| } else if (!strcmp(cmd, "--html-path")) { |
| puts(system_path(GIT_HTML_PATH)); |
| exit(0); |
| } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) { |
| use_pager = 1; |
| } else if (!strcmp(cmd, "--no-pager")) { |
| use_pager = 0; |
| if (envchanged) |
| *envchanged = 1; |
| } else if (!strcmp(cmd, "--no-replace-objects")) { |
| read_replace_refs = 0; |
| setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 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 if (!strcmp(cmd, "-c")) { |
| if (*argc < 2) { |
| fprintf(stderr, "-c expects a configuration string\n" ); |
| usage(git_usage_string); |
| } |
| git_config_push_parameter((*argv)[1]); |
| (*argv)++; |
| (*argc)--; |
| } else { |
| fprintf(stderr, "Unknown option: %s\n", cmd); |
| usage(git_usage_string); |
| } |
| |
| (*argv)++; |
| (*argc)--; |
| handled++; |
| } |
| return handled; |
| } |
| |
| static int handle_alias(int *argcp, const char ***argv) |
| { |
| int envchanged = 0, ret = 0, saved_errno = errno; |
| const char *subdir; |
| int count, option_count; |
| const char **new_argv; |
| const char *alias_command; |
| char *alias_string; |
| int unused_nongit; |
| |
| subdir = setup_git_directory_gently(&unused_nongit); |
| |
| alias_command = (*argv)[0]; |
| alias_string = alias_lookup(alias_command); |
| if (alias_string) { |
| if (alias_string[0] == '!') { |
| commit_pager_choice(); |
| if (*argcp > 1) { |
| struct strbuf buf; |
| |
| strbuf_init(&buf, PATH_MAX); |
| strbuf_addstr(&buf, alias_string); |
| sq_quote_argv(&buf, (*argv) + 1, PATH_MAX); |
| free(alias_string); |
| alias_string = buf.buf; |
| } |
| 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'", |
| alias_string + 1, alias_command); |
| } |
| count = split_cmdline(alias_string, &new_argv); |
| if (count < 0) |
| die("Bad alias.%s string: %s", alias_command, |
| split_cmdline_strerror(count)); |
| 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, |
| "trace: alias expansion: %s =>", |
| alias_command); |
| |
| new_argv = xrealloc(new_argv, sizeof(char *) * |
| (count + *argcp)); |
| /* insert after command name */ |
| memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp); |
| |
| *argv = new_argv; |
| *argcp += count - 1; |
| |
| ret = 1; |
| } |
| |
| if (subdir && chdir(subdir)) |
| die_errno("Cannot change to '%s'", subdir); |
| |
| errno = saved_errno; |
| |
| return ret; |
| } |
| |
| const char git_version_string[] = GIT_VERSION; |
| |
| #define RUN_SETUP (1<<0) |
| #define RUN_SETUP_GENTLY (1<<1) |
| #define USE_PAGER (1<<2) |
| /* |
| * require working tree to be present -- anything uses this needs |
| * RUN_SETUP for reading from the configuration file. |
| */ |
| #define NEED_WORK_TREE (1<<3) |
| |
| struct cmd_struct { |
| const char *cmd; |
| int (*fn)(int, const char **, const char *); |
| int option; |
| }; |
| |
| static int run_builtin(struct cmd_struct *p, int argc, const char **argv) |
| { |
| int status, help; |
| struct stat st; |
| const char *prefix; |
| |
| prefix = NULL; |
| help = argc == 2 && !strcmp(argv[1], "-h"); |
| if (!help) { |
| if (p->option & RUN_SETUP) |
| prefix = setup_git_directory(); |
| if (p->option & RUN_SETUP_GENTLY) { |
| int nongit_ok; |
| prefix = setup_git_directory_gently(&nongit_ok); |
| } |
| |
| if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) |
| use_pager = check_pager_config(p->cmd); |
| if (use_pager == -1 && p->option & USE_PAGER) |
| use_pager = 1; |
| |
| if ((p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) && |
| startup_info->have_repository) /* get_git_dir() may set up repo, avoid that */ |
| trace_repo_setup(prefix); |
| } |
| commit_pager_choice(); |
| |
| if (!help && p->option & NEED_WORK_TREE) |
| setup_work_tree(); |
| |
| trace_argv_printf(argv, "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_errno("write failure on standard output"); |
| if (ferror(stdout)) |
| die("unknown write failure on standard output"); |
| if (fclose(stdout)) |
| die_errno("close failed on standard output"); |
| return 0; |
| } |
| |
| static void handle_internal_command(int argc, const char **argv) |
| { |
| const char *cmd = argv[0]; |
| static struct cmd_struct commands[] = { |
| { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE }, |
| { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE }, |
| { "annotate", cmd_annotate, RUN_SETUP }, |
| { "apply", cmd_apply, RUN_SETUP_GENTLY }, |
| { "archive", cmd_archive }, |
| { "bisect--helper", cmd_bisect__helper, RUN_SETUP | NEED_WORK_TREE }, |
| { "blame", cmd_blame, RUN_SETUP }, |
| { "branch", cmd_branch, RUN_SETUP }, |
| { "bundle", cmd_bundle, RUN_SETUP_GENTLY }, |
| { "cat-file", cmd_cat_file, RUN_SETUP }, |
| { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE }, |
| { "checkout-index", cmd_checkout_index, |
| RUN_SETUP | NEED_WORK_TREE}, |
| { "check-ref-format", cmd_check_ref_format }, |
| { "check-attr", cmd_check_attr, RUN_SETUP }, |
| { "cherry", cmd_cherry, RUN_SETUP }, |
| { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE }, |
| { "clone", cmd_clone }, |
| { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE }, |
| { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE }, |
| { "commit-tree", cmd_commit_tree, RUN_SETUP }, |
| { "config", cmd_config, RUN_SETUP_GENTLY }, |
| { "count-objects", cmd_count_objects, RUN_SETUP }, |
| { "describe", cmd_describe, RUN_SETUP }, |
| { "diff", cmd_diff }, |
| { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE }, |
| { "diff-index", cmd_diff_index, RUN_SETUP }, |
| { "diff-tree", cmd_diff_tree, RUN_SETUP }, |
| { "fast-export", cmd_fast_export, RUN_SETUP }, |
| { "fetch", cmd_fetch, RUN_SETUP }, |
| { "fetch-pack", cmd_fetch_pack, 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_GENTLY }, |
| { "hash-object", cmd_hash_object }, |
| { "help", cmd_help }, |
| { "index-pack", cmd_index_pack, RUN_SETUP_GENTLY }, |
| { "init", cmd_init_db }, |
| { "init-db", cmd_init_db }, |
| { "log", cmd_log, RUN_SETUP }, |
| { "ls-files", cmd_ls_files, RUN_SETUP }, |
| { "ls-tree", cmd_ls_tree, RUN_SETUP }, |
| { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY }, |
| { "mailinfo", cmd_mailinfo }, |
| { "mailsplit", cmd_mailsplit }, |
| { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE }, |
| { "merge-base", cmd_merge_base, RUN_SETUP }, |
| { "merge-file", cmd_merge_file, RUN_SETUP_GENTLY }, |
| { "merge-index", cmd_merge_index, RUN_SETUP }, |
| { "merge-ours", cmd_merge_ours, RUN_SETUP }, |
| { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE }, |
| { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE }, |
| { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE }, |
| { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE }, |
| { "merge-tree", cmd_merge_tree, RUN_SETUP }, |
| { "mktag", cmd_mktag, RUN_SETUP }, |
| { "mktree", cmd_mktree, RUN_SETUP }, |
| { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE }, |
| { "name-rev", cmd_name_rev, RUN_SETUP }, |
| { "notes", cmd_notes, RUN_SETUP }, |
| { "pack-objects", cmd_pack_objects, RUN_SETUP }, |
| { "pack-redundant", cmd_pack_redundant, RUN_SETUP }, |
| { "patch-id", cmd_patch_id }, |
| { "peek-remote", cmd_ls_remote, RUN_SETUP_GENTLY }, |
| { "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 }, |
| { "receive-pack", cmd_receive_pack }, |
| { "reflog", cmd_reflog, RUN_SETUP }, |
| { "remote", cmd_remote, RUN_SETUP }, |
| { "remote-ext", cmd_remote_ext }, |
| { "remote-fd", cmd_remote_fd }, |
| { "replace", cmd_replace, RUN_SETUP }, |
| { "repo-config", cmd_config, RUN_SETUP_GENTLY }, |
| { "rerere", cmd_rerere, RUN_SETUP }, |
| { "reset", cmd_reset, RUN_SETUP }, |
| { "rev-list", cmd_rev_list, RUN_SETUP }, |
| { "rev-parse", cmd_rev_parse }, |
| { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE }, |
| { "rm", cmd_rm, RUN_SETUP }, |
| { "send-pack", cmd_send_pack, RUN_SETUP }, |
| { "shortlog", cmd_shortlog, RUN_SETUP_GENTLY | USE_PAGER }, |
| { "show-branch", cmd_show_branch, RUN_SETUP }, |
| { "show", cmd_show, RUN_SETUP }, |
| { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE }, |
| { "stripspace", cmd_stripspace }, |
| { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP }, |
| { "tag", cmd_tag, RUN_SETUP }, |
| { "tar-tree", cmd_tar_tree }, |
| { "unpack-file", cmd_unpack_file, RUN_SETUP }, |
| { "unpack-objects", cmd_unpack_objects, RUN_SETUP }, |
| { "update-index", cmd_update_index, RUN_SETUP }, |
| { "update-ref", cmd_update_ref, RUN_SETUP }, |
| { "update-server-info", cmd_update_server_info, RUN_SETUP }, |
| { "upload-archive", cmd_upload_archive }, |
| { "var", cmd_var, RUN_SETUP_GENTLY }, |
| { "verify-tag", cmd_verify_tag, RUN_SETUP }, |
| { "version", cmd_version }, |
| { "whatchanged", cmd_whatchanged, RUN_SETUP }, |
| { "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; |
| static const char ext[] = STRIP_EXTENSION; |
| |
| if (sizeof(ext) > 1) { |
| i = strlen(argv[0]) - strlen(ext); |
| if (i > 0 && !strcmp(argv[0] + i, ext)) { |
| char *argv0 = xstrdup(argv[0]); |
| argv[0] = cmd = argv0; |
| argv0[i] = '\0'; |
| } |
| } |
| |
| /* Turn "git cmd --help" into "git help cmd" */ |
| if (argc > 1 && !strcmp(argv[1], "--help")) { |
| argv[1] = argv[0]; |
| argv[0] = cmd = "help"; |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(commands); i++) { |
| struct cmd_struct *p = commands+i; |
| if (strcmp(p->cmd, cmd)) |
| continue; |
| exit(run_builtin(p, argc, argv)); |
| } |
| } |
| |
| static void execv_dashed_external(const char **argv) |
| { |
| struct strbuf cmd = STRBUF_INIT; |
| const char *tmp; |
| int status; |
| |
| commit_pager_choice(); |
| |
| strbuf_addf(&cmd, "git-%s", argv[0]); |
| |
| /* |
| * argv[0] must be the git command, but the argv array |
| * belongs to the caller, and may be reused in |
| * subsequent loop iterations. Save argv[0] and |
| * restore it on error. |
| */ |
| tmp = argv[0]; |
| argv[0] = cmd.buf; |
| |
| trace_argv_printf(argv, "trace: exec:"); |
| |
| /* |
| * if we fail because the command is not found, it is |
| * OK to return. Otherwise, we just pass along the status code. |
| */ |
| status = run_command_v_opt(argv, RUN_SILENT_EXEC_FAILURE); |
| if (status >= 0 || errno != ENOENT) |
| exit(status); |
| |
| argv[0] = tmp; |
| |
| strbuf_release(&cmd); |
| } |
| |
| static int run_argv(int *argcp, const char ***argv) |
| { |
| int done_alias = 0; |
| |
| while (1) { |
| /* See if it's an internal command */ |
| handle_internal_command(*argcp, *argv); |
| |
| /* .. then try the external ones */ |
| execv_dashed_external(*argv); |
| |
| /* It could be an alias -- this works around the insanity |
| * of overriding "git log" with "git show" by having |
| * alias.log = show |
| */ |
| if (done_alias || !handle_alias(argcp, argv)) |
| break; |
| done_alias = 1; |
| } |
| |
| return done_alias; |
| } |
| |
| |
| int main(int argc, const char **argv) |
| { |
| const char *cmd; |
| |
| startup_info = &git_startup_info; |
| |
| cmd = git_extract_argv0_path(argv[0]); |
| if (!cmd) |
| cmd = "git-help"; |
| |
| /* |
| * "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 (!prefixcmp(cmd, "git-")) { |
| cmd += 4; |
| argv[0] = cmd; |
| handle_internal_command(argc, argv); |
| die("cannot handle %s internally", cmd); |
| } |
| |
| /* Look for flags.. */ |
| argv++; |
| argc--; |
| handle_options(&argv, &argc, NULL); |
| if (argc > 0) { |
| if (!prefixcmp(argv[0], "--")) |
| argv[0] += 2; |
| } else { |
| /* The user didn't specify a command; give them help */ |
| commit_pager_choice(); |
| printf("usage: %s\n\n", git_usage_string); |
| list_common_cmds_help(); |
| printf("\n%s\n", git_more_info_string); |
| exit(1); |
| } |
| cmd = argv[0]; |
| |
| /* |
| * We use PATH to find git commands, but we prepend some higher |
| * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH |
| * environment, and the $(gitexecdir) from the Makefile at build |
| * time. |
| */ |
| setup_path(); |
| |
| while (1) { |
| static int done_help = 0; |
| static int was_alias = 0; |
| was_alias = run_argv(&argc, &argv); |
| if (errno != ENOENT) |
| break; |
| if (was_alias) { |
| fprintf(stderr, "Expansion of alias '%s' failed; " |
| "'%s' is not a git command\n", |
| cmd, argv[0]); |
| exit(1); |
| } |
| if (!done_help) { |
| cmd = argv[0] = help_unknown_cmd(cmd); |
| done_help = 1; |
| } else |
| break; |
| } |
| |
| fprintf(stderr, "Failed to run command '%s': %s\n", |
| cmd, strerror(errno)); |
| |
| return 1; |
| } |