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474 lines
13 KiB
474 lines
13 KiB
#include "builtin.h" |
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#include "exec_cmd.h" |
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#include "cache.h" |
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#include "quote.h" |
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const char git_usage_string[] = |
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"git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate|--no-pager] [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE] [--help] COMMAND [ARGS]"; |
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static int handle_options(const char*** argv, int* argc, int* envchanged) |
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{ |
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int handled = 0; |
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|
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while (*argc > 0) { |
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const char *cmd = (*argv)[0]; |
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if (cmd[0] != '-') |
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break; |
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/* |
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* For legacy reasons, the "version" and "help" |
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* commands can be written with "--" prepended |
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* to make them look like flags. |
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*/ |
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if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version")) |
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break; |
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/* |
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* Check remaining flags. |
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*/ |
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if (!prefixcmp(cmd, "--exec-path")) { |
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cmd += 11; |
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if (*cmd == '=') |
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git_set_argv_exec_path(cmd + 1); |
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else { |
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puts(git_exec_path()); |
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exit(0); |
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} |
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} else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) { |
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setup_pager(); |
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} else if (!strcmp(cmd, "--no-pager")) { |
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setenv("GIT_PAGER", "cat", 1); |
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if (envchanged) |
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*envchanged = 1; |
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} else if (!strcmp(cmd, "--git-dir")) { |
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if (*argc < 2) { |
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fprintf(stderr, "No directory given for --git-dir.\n" ); |
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usage(git_usage_string); |
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} |
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setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1); |
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if (envchanged) |
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*envchanged = 1; |
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(*argv)++; |
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(*argc)--; |
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handled++; |
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} else if (!prefixcmp(cmd, "--git-dir=")) { |
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setenv(GIT_DIR_ENVIRONMENT, cmd + 10, 1); |
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if (envchanged) |
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*envchanged = 1; |
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} else if (!strcmp(cmd, "--work-tree")) { |
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if (*argc < 2) { |
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fprintf(stderr, "No directory given for --work-tree.\n" ); |
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usage(git_usage_string); |
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} |
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setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1); |
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if (envchanged) |
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*envchanged = 1; |
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(*argv)++; |
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(*argc)--; |
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} else if (!prefixcmp(cmd, "--work-tree=")) { |
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setenv(GIT_WORK_TREE_ENVIRONMENT, cmd + 12, 1); |
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if (envchanged) |
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*envchanged = 1; |
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} else if (!strcmp(cmd, "--bare")) { |
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static char git_dir[PATH_MAX+1]; |
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is_bare_repository_cfg = 1; |
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setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 0); |
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if (envchanged) |
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*envchanged = 1; |
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} else { |
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fprintf(stderr, "Unknown option: %s\n", cmd); |
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usage(git_usage_string); |
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} |
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(*argv)++; |
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(*argc)--; |
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handled++; |
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} |
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return handled; |
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} |
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static const char *alias_command; |
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static char *alias_string; |
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static int git_alias_config(const char *var, const char *value) |
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{ |
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if (!prefixcmp(var, "alias.") && !strcmp(var + 6, alias_command)) { |
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alias_string = xstrdup(value); |
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} |
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return 0; |
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} |
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static int split_cmdline(char *cmdline, const char ***argv) |
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{ |
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int src, dst, count = 0, size = 16; |
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char quoted = 0; |
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*argv = xmalloc(sizeof(char*) * size); |
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/* split alias_string */ |
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(*argv)[count++] = cmdline; |
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for (src = dst = 0; cmdline[src];) { |
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char c = cmdline[src]; |
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if (!quoted && isspace(c)) { |
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cmdline[dst++] = 0; |
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while (cmdline[++src] |
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&& isspace(cmdline[src])) |
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; /* skip */ |
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if (count >= size) { |
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size += 16; |
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*argv = xrealloc(*argv, sizeof(char*) * size); |
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} |
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(*argv)[count++] = cmdline + dst; |
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} else if(!quoted && (c == '\'' || c == '"')) { |
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quoted = c; |
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src++; |
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} else if (c == quoted) { |
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quoted = 0; |
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src++; |
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} else { |
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if (c == '\\' && quoted != '\'') { |
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src++; |
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c = cmdline[src]; |
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if (!c) { |
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free(*argv); |
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*argv = NULL; |
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return error("cmdline ends with \\"); |
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} |
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} |
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cmdline[dst++] = c; |
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src++; |
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} |
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} |
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cmdline[dst] = 0; |
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if (quoted) { |
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free(*argv); |
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*argv = NULL; |
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return error("unclosed quote"); |
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} |
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return count; |
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} |
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static int handle_alias(int *argcp, const char ***argv) |
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{ |
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int nongit = 0, envchanged = 0, ret = 0, saved_errno = errno; |
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const char *subdir; |
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int count, option_count; |
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const char** new_argv; |
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subdir = setup_git_directory_gently(&nongit); |
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alias_command = (*argv)[0]; |
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git_config(git_alias_config); |
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if (alias_string) { |
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if (alias_string[0] == '!') { |
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if (*argcp > 1) { |
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struct strbuf buf; |
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strbuf_init(&buf, PATH_MAX); |
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strbuf_addstr(&buf, alias_string); |
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sq_quote_argv(&buf, (*argv) + 1, PATH_MAX); |
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free(alias_string); |
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alias_string = buf.buf; |
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} |
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trace_printf("trace: alias to shell cmd: %s => %s\n", |
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alias_command, alias_string + 1); |
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ret = system(alias_string + 1); |
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if (ret >= 0 && WIFEXITED(ret) && |
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WEXITSTATUS(ret) != 127) |
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exit(WEXITSTATUS(ret)); |
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die("Failed to run '%s' when expanding alias '%s'\n", |
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alias_string + 1, alias_command); |
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} |
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count = split_cmdline(alias_string, &new_argv); |
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option_count = handle_options(&new_argv, &count, &envchanged); |
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if (envchanged) |
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die("alias '%s' changes environment variables\n" |
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"You can use '!git' in the alias to do this.", |
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alias_command); |
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memmove(new_argv - option_count, new_argv, |
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count * sizeof(char *)); |
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new_argv -= option_count; |
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if (count < 1) |
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die("empty alias for %s", alias_command); |
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if (!strcmp(alias_command, new_argv[0])) |
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die("recursive alias: %s", alias_command); |
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trace_argv_printf(new_argv, |
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"trace: alias expansion: %s =>", |
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alias_command); |
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new_argv = xrealloc(new_argv, sizeof(char*) * |
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(count + *argcp + 1)); |
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/* insert after command name */ |
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memcpy(new_argv + count, *argv + 1, sizeof(char*) * *argcp); |
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new_argv[count+*argcp] = NULL; |
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*argv = new_argv; |
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*argcp += count - 1; |
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ret = 1; |
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} |
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if (subdir) |
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chdir(subdir); |
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errno = saved_errno; |
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return ret; |
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} |
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const char git_version_string[] = GIT_VERSION; |
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#define RUN_SETUP (1<<0) |
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#define USE_PAGER (1<<1) |
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/* |
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* require working tree to be present -- anything uses this needs |
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* RUN_SETUP for reading from the configuration file. |
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*/ |
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#define NEED_WORK_TREE (1<<2) |
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struct cmd_struct { |
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const char *cmd; |
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int (*fn)(int, const char **, const char *); |
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int option; |
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}; |
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static int run_command(struct cmd_struct *p, int argc, const char **argv) |
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{ |
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int status; |
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struct stat st; |
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const char *prefix; |
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prefix = NULL; |
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if (p->option & RUN_SETUP) |
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prefix = setup_git_directory(); |
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if (p->option & USE_PAGER) |
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setup_pager(); |
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if (p->option & NEED_WORK_TREE) |
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setup_work_tree(); |
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trace_argv_printf(argv, "trace: built-in: git"); |
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status = p->fn(argc, argv, prefix); |
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if (status) |
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return status & 0xff; |
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/* Somebody closed stdout? */ |
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if (fstat(fileno(stdout), &st)) |
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return 0; |
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/* Ignore write errors for pipes and sockets.. */ |
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if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) |
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return 0; |
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/* Check for ENOSPC and EIO errors.. */ |
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if (fflush(stdout)) |
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die("write failure on standard output: %s", strerror(errno)); |
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if (ferror(stdout)) |
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die("unknown write failure on standard output"); |
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if (fclose(stdout)) |
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die("close failed on standard output: %s", strerror(errno)); |
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return 0; |
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} |
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static void handle_internal_command(int argc, const char **argv) |
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{ |
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const char *cmd = argv[0]; |
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static struct cmd_struct commands[] = { |
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{ "add", cmd_add, RUN_SETUP | NEED_WORK_TREE }, |
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{ "annotate", cmd_annotate, RUN_SETUP }, |
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{ "apply", cmd_apply }, |
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{ "archive", cmd_archive }, |
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{ "blame", cmd_blame, RUN_SETUP }, |
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{ "branch", cmd_branch, RUN_SETUP }, |
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{ "bundle", cmd_bundle }, |
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{ "cat-file", cmd_cat_file, RUN_SETUP }, |
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{ "checkout-index", cmd_checkout_index, |
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RUN_SETUP | NEED_WORK_TREE}, |
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{ "check-ref-format", cmd_check_ref_format }, |
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{ "check-attr", cmd_check_attr, RUN_SETUP | NEED_WORK_TREE }, |
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{ "cherry", cmd_cherry, RUN_SETUP }, |
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{ "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE }, |
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{ "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE }, |
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{ "commit-tree", cmd_commit_tree, RUN_SETUP }, |
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{ "config", cmd_config }, |
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{ "count-objects", cmd_count_objects, RUN_SETUP }, |
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{ "describe", cmd_describe, RUN_SETUP }, |
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{ "diff", cmd_diff }, |
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{ "diff-files", cmd_diff_files }, |
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{ "diff-index", cmd_diff_index, RUN_SETUP }, |
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{ "diff-tree", cmd_diff_tree, RUN_SETUP }, |
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{ "fast-export", cmd_fast_export, RUN_SETUP }, |
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{ "fetch", cmd_fetch, RUN_SETUP }, |
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{ "fetch-pack", cmd_fetch_pack, RUN_SETUP }, |
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{ "fetch--tool", cmd_fetch__tool, RUN_SETUP }, |
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{ "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP }, |
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{ "for-each-ref", cmd_for_each_ref, RUN_SETUP }, |
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{ "format-patch", cmd_format_patch, RUN_SETUP }, |
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{ "fsck", cmd_fsck, RUN_SETUP }, |
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{ "fsck-objects", cmd_fsck, RUN_SETUP }, |
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{ "gc", cmd_gc, RUN_SETUP }, |
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{ "get-tar-commit-id", cmd_get_tar_commit_id }, |
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{ "grep", cmd_grep, RUN_SETUP | USE_PAGER }, |
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{ "help", cmd_help }, |
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#ifndef NO_CURL |
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{ "http-fetch", cmd_http_fetch, RUN_SETUP }, |
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#endif |
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{ "init", cmd_init_db }, |
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{ "init-db", cmd_init_db }, |
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{ "log", cmd_log, RUN_SETUP | USE_PAGER }, |
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{ "ls-files", cmd_ls_files, RUN_SETUP }, |
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{ "ls-tree", cmd_ls_tree, RUN_SETUP }, |
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{ "ls-remote", cmd_ls_remote }, |
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{ "mailinfo", cmd_mailinfo }, |
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{ "mailsplit", cmd_mailsplit }, |
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{ "merge-base", cmd_merge_base, RUN_SETUP }, |
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{ "merge-file", cmd_merge_file }, |
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{ "merge-ours", cmd_merge_ours, RUN_SETUP }, |
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{ "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE }, |
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{ "name-rev", cmd_name_rev, RUN_SETUP }, |
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{ "pack-objects", cmd_pack_objects, RUN_SETUP }, |
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{ "peek-remote", cmd_ls_remote }, |
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{ "pickaxe", cmd_blame, RUN_SETUP }, |
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{ "prune", cmd_prune, RUN_SETUP }, |
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{ "prune-packed", cmd_prune_packed, RUN_SETUP }, |
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{ "push", cmd_push, RUN_SETUP }, |
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{ "read-tree", cmd_read_tree, RUN_SETUP }, |
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{ "reflog", cmd_reflog, RUN_SETUP }, |
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{ "repo-config", cmd_config }, |
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{ "rerere", cmd_rerere, RUN_SETUP }, |
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{ "reset", cmd_reset, RUN_SETUP }, |
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{ "rev-list", cmd_rev_list, RUN_SETUP }, |
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{ "rev-parse", cmd_rev_parse }, |
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{ "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE }, |
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{ "rm", cmd_rm, RUN_SETUP }, |
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{ "runstatus", cmd_runstatus, RUN_SETUP | NEED_WORK_TREE }, |
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{ "send-pack", cmd_send_pack, RUN_SETUP }, |
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{ "shortlog", cmd_shortlog, RUN_SETUP | USE_PAGER }, |
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{ "show-branch", cmd_show_branch, RUN_SETUP }, |
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{ "show", cmd_show, RUN_SETUP | USE_PAGER }, |
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{ "stripspace", cmd_stripspace }, |
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{ "symbolic-ref", cmd_symbolic_ref, RUN_SETUP }, |
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{ "tag", cmd_tag, RUN_SETUP }, |
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{ "tar-tree", cmd_tar_tree }, |
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{ "unpack-objects", cmd_unpack_objects, RUN_SETUP }, |
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{ "update-index", cmd_update_index, RUN_SETUP }, |
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{ "update-ref", cmd_update_ref, RUN_SETUP }, |
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{ "upload-archive", cmd_upload_archive }, |
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{ "verify-tag", cmd_verify_tag, RUN_SETUP }, |
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{ "version", cmd_version }, |
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{ "whatchanged", cmd_whatchanged, RUN_SETUP | USE_PAGER }, |
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{ "write-tree", cmd_write_tree, RUN_SETUP }, |
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{ "verify-pack", cmd_verify_pack }, |
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{ "show-ref", cmd_show_ref, RUN_SETUP }, |
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{ "pack-refs", cmd_pack_refs, RUN_SETUP }, |
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}; |
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int i; |
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/* Turn "git cmd --help" into "git help cmd" */ |
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if (argc > 1 && !strcmp(argv[1], "--help")) { |
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argv[1] = argv[0]; |
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argv[0] = cmd = "help"; |
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} |
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for (i = 0; i < ARRAY_SIZE(commands); i++) { |
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struct cmd_struct *p = commands+i; |
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if (strcmp(p->cmd, cmd)) |
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continue; |
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exit(run_command(p, argc, argv)); |
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} |
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} |
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int main(int argc, const char **argv) |
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{ |
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const char *cmd = argv[0] ? argv[0] : "git-help"; |
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char *slash = strrchr(cmd, '/'); |
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const char *cmd_path = NULL; |
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int done_alias = 0; |
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/* |
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* Take the basename of argv[0] as the command |
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* name, and the dirname as the default exec_path |
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* if we don't have anything better. |
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*/ |
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if (slash) { |
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*slash++ = 0; |
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cmd_path = cmd; |
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cmd = slash; |
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} |
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/* |
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* "git-xxxx" is the same as "git xxxx", but we obviously: |
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* |
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* - cannot take flags in between the "git" and the "xxxx". |
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* - cannot execute it externally (since it would just do |
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* the same thing over again) |
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* |
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* So we just directly call the internal command handler, and |
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* die if that one cannot handle it. |
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*/ |
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if (!prefixcmp(cmd, "git-")) { |
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cmd += 4; |
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argv[0] = cmd; |
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handle_internal_command(argc, argv); |
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die("cannot handle %s internally", cmd); |
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} |
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/* Look for flags.. */ |
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argv++; |
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argc--; |
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handle_options(&argv, &argc, NULL); |
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if (argc > 0) { |
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if (!prefixcmp(argv[0], "--")) |
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argv[0] += 2; |
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} else { |
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/* The user didn't specify a command; give them help */ |
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printf("usage: %s\n\n", git_usage_string); |
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list_common_cmds_help(); |
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exit(1); |
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} |
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cmd = argv[0]; |
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/* |
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* We use PATH to find git commands, but we prepend some higher |
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* precidence paths: the "--exec-path" option, the GIT_EXEC_PATH |
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* environment, and the $(gitexecdir) from the Makefile at build |
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* time. |
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*/ |
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setup_path(cmd_path); |
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|
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while (1) { |
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/* See if it's an internal command */ |
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handle_internal_command(argc, argv); |
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|
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/* .. then try the external ones */ |
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execv_git_cmd(argv); |
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|
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/* It could be an alias -- this works around the insanity |
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* of overriding "git log" with "git show" by having |
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* alias.log = show |
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*/ |
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if (done_alias || !handle_alias(&argc, &argv)) |
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break; |
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done_alias = 1; |
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} |
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if (errno == ENOENT) { |
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if (done_alias) { |
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fprintf(stderr, "Expansion of alias '%s' failed; " |
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"'%s' is not a git-command\n", |
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cmd, argv[0]); |
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exit(1); |
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} |
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help_unknown_cmd(cmd); |
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} |
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fprintf(stderr, "Failed to run command '%s': %s\n", |
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cmd, strerror(errno)); |
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return 1; |
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}
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