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builtin-apply.c
builtin-archive.c
builtin-blame.c
builtin-branch.c
builtin-cat-file.c
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builtin-checkout-index.c
builtin-commit-tree.c
builtin-count-objects.c
builtin-describe.c
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builtin-diff-index.c
builtin-diff-stages.c
builtin-diff-tree.c
builtin-diff.c
builtin-fmt-merge-msg.c
builtin-for-each-ref.c
builtin-grep.c
builtin-init-db.c
builtin-log.c
builtin-ls-files.c
builtin-ls-tree.c
builtin-mailinfo.c
builtin-mailsplit.c
builtin-merge-file.c
builtin-mv.c
builtin-name-rev.c
builtin-pack-objects.c
builtin-pack-refs.c
builtin-prune-packed.c
builtin-prune.c
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builtin-rev-list.c
builtin-rev-parse.c
builtin-rm.c
builtin-runstatus.c
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builtin-show-branch.c
builtin-show-ref.c
builtin-stripspace.c
builtin-symbolic-ref.c
builtin-tar-tree.c
builtin-unpack-objects.c
builtin-update-index.c
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#include "builtin.h" #include "exec_cmd.h" #include "cache.h" #include "quote.h" const char git_usage_string[] = "git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate] [--bare] [--git-dir=GIT_DIR] [--help] COMMAND [ARGS]"; static void prepend_to_path(const char *dir, int len) { const char *old_path = getenv("PATH"); char *path; int path_len = len; if (!old_path) old_path = "/usr/local/bin:/usr/bin:/bin"; path_len = len + strlen(old_path) + 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 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 (!strncmp(cmd, "--exec-path", 11)) { 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, "--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); (*argv)++; (*argc)--; } else if (!strncmp(cmd, "--git-dir=", 10)) { setenv(GIT_DIR_ENVIRONMENT, cmd + 10, 1); } else if (!strcmp(cmd, "--bare")) { static char git_dir[PATH_MAX+1]; setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 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; static int git_alias_config(const char *var, const char *value) { if (!strncmp(var, "alias.", 6) && !strcmp(var + 6, alias_command)) { alias_string = xstrdup(value); } return 0; } static int split_cmdline(char *cmdline, const char ***argv) { int src, dst, count = 0, size = 16; char quoted = 0; *argv = malloc(sizeof(char*) * size); /* split alias_string */ (*argv)[count++] = cmdline; for (src = dst = 0; cmdline[src];) { char c = cmdline[src]; if (!quoted && isspace(c)) { cmdline[dst++] = 0; while (cmdline[++src] && isspace(cmdline[src])) ; /* skip */ if (count >= size) { size += 16; *argv = xrealloc(*argv, sizeof(char*) * size); } (*argv)[count++] = cmdline + dst; } else if(!quoted && (c == '\'' || c == '"')) { quoted = c; src++; } else if (c == quoted) { quoted = 0; src++; } else { if (c == '\\' && quoted != '\'') { src++; c = cmdline[src]; if (!c) { free(*argv); *argv = NULL; return error("cmdline ends with \\"); } } cmdline[dst++] = c; src++; } } cmdline[dst] = 0; if (quoted) { free(*argv); *argv = NULL; return error("unclosed quote"); } return count; } static int handle_alias(int *argcp, const char ***argv) { int nongit = 0, ret = 0, saved_errno = errno; const char *subdir; int count, option_count; const char** new_argv; subdir = setup_git_directory_gently(&nongit); alias_command = (*argv)[0]; git_config(git_alias_config); if (alias_string) { count = split_cmdline(alias_string, &new_argv); option_count = handle_options(&new_argv, &count); 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) chdir(subdir); errno = saved_errno; return ret; } const char git_version_string[] = GIT_VERSION; #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 NOT_BARE (1<<2) 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 **, const char *); int option; } commands[] = { { "add", cmd_add, RUN_SETUP | NOT_BARE }, { "annotate", cmd_annotate, }, { "apply", cmd_apply }, { "archive", cmd_archive }, { "blame", cmd_blame, RUN_SETUP | USE_PAGER }, { "branch", cmd_branch, RUN_SETUP }, { "cat-file", cmd_cat_file, RUN_SETUP }, { "checkout-index", cmd_checkout_index, RUN_SETUP }, { "check-ref-format", cmd_check_ref_format }, { "cherry", cmd_cherry, RUN_SETUP }, { "commit-tree", cmd_commit_tree, RUN_SETUP }, { "count-objects", cmd_count_objects, RUN_SETUP }, { "describe", cmd_describe, RUN_SETUP }, { "diff", cmd_diff, RUN_SETUP | USE_PAGER }, { "diff-files", cmd_diff_files, RUN_SETUP }, { "diff-index", cmd_diff_index, RUN_SETUP }, { "diff-stages", cmd_diff_stages, RUN_SETUP }, { "diff-tree", cmd_diff_tree, 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 }, { "get-tar-commit-id", cmd_get_tar_commit_id }, { "grep", cmd_grep, RUN_SETUP }, { "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-file", cmd_merge_file }, { "mv", cmd_mv, RUN_SETUP | NOT_BARE }, { "name-rev", cmd_name_rev, RUN_SETUP }, { "pack-objects", cmd_pack_objects, RUN_SETUP }, { "pickaxe", cmd_blame, RUN_SETUP | USE_PAGER }, { "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_repo_config }, { "rerere", cmd_rerere, RUN_SETUP }, { "rev-list", cmd_rev_list, RUN_SETUP }, { "rev-parse", cmd_rev_parse, RUN_SETUP }, { "rm", cmd_rm, RUN_SETUP | NOT_BARE }, { "runstatus", cmd_runstatus, RUN_SETUP | NOT_BARE }, { "shortlog", cmd_shortlog, RUN_SETUP | USE_PAGER }, { "show-branch", cmd_show_branch, RUN_SETUP }, { "show", cmd_show, RUN_SETUP | USE_PAGER }, { "stripspace", cmd_stripspace }, { "symbolic-ref", cmd_symbolic_ref, 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 }, { "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; /* 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; const char *prefix; if (strcmp(p->cmd, cmd)) continue; prefix = NULL; if (p->option & RUN_SETUP) prefix = setup_git_directory(); if (p->option & USE_PAGER) setup_pager(); if ((p->option & NOT_BARE) && is_bare_repository()) die("%s cannot be used in a bare git directory", cmd); trace_argv_printf(argv, argc, "trace: built-in: git"); exit(p->fn(argc, argv, prefix)); } } int main(int argc, const char **argv, char **envp) { const char *cmd = argv[0] ? argv[0] : "git-help"; char *slash = strrchr(cmd, '/'); const char *exec_path = NULL; int done_alias = 0; /* * 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; } /* * "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); } /* Look for flags.. */ argv++; argc--; handle_options(&argv, &argc); if (argc > 0) { if (!strncmp(argv[0], "--", 2)) argv[0] += 2; } else { /* Default command: "help" */ argv[0] = "help"; argc = 1; } 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. */ if (exec_path) prepend_to_path(exec_path, strlen(exec_path)); exec_path = git_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); /* .. then try the external ones */ execv_git_cmd(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(&argc, &argv)) break; done_alias = 1; } if (errno == ENOENT) help_unknown_cmd(cmd); fprintf(stderr, "Failed to run command '%s': %s\n", cmd, strerror(errno)); return 1; }
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