diff options
Diffstat (limited to 'git.c')
| -rw-r--r-- | git.c | 462 |
1 files changed, 280 insertions, 182 deletions
@@ -1,54 +1,58 @@ #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] [--man-path] [--info-path]\n" - " [-p|--paginate|--no-pager] [--no-replace-objects] [--bare]\n" + "git [--version] [--help] [-C <path>] [-c name=value]\n" + " [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n" + " [-p | --paginate | --no-pager] [--no-replace-objects] [--bare]\n" " [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\n" - " [-c name=value] [--help]\n" " <command> [<args>]"; const char git_more_info_string[] = - N_("See 'git help <command>' for more information on a specific command."); + N_("'git help -a' and 'git help -g' list available subcommands and some\n" + "concept guides. See 'git help <command>' or 'git help <concept>'\n" + "to read about a specific subcommand or concept."); static struct startup_info git_startup_info; static int use_pager = -1; -struct pager_config { - const char *cmd; - int want; - char *value; +static char *orig_cwd; +static const char *env_names[] = { + GIT_DIR_ENVIRONMENT, + GIT_WORK_TREE_ENVIRONMENT, + GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, + GIT_PREFIX_ENVIRONMENT }; +static char *orig_env[4]; +static int saved_environment; -static int pager_command_config(const char *var, const char *value, void *data) +static void save_env(void) { - 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); - } + int i; + if (saved_environment) + return; + saved_environment = 1; + orig_cwd = xgetcwd(); + for (i = 0; i < ARRAY_SIZE(env_names); i++) { + orig_env[i] = getenv(env_names[i]); + if (orig_env[i]) + orig_env[i] = xstrdup(orig_env[i]); } - return 0; } -/* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */ -int check_pager_config(const char *cmd) +static void restore_env(void) { - 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; + int i; + if (orig_cwd && chdir(orig_cwd)) + die_errno("could not move to %s", orig_cwd); + free(orig_cwd); + for (i = 0; i < ARRAY_SIZE(env_names); i++) { + if (orig_env[i]) + setenv(env_names[i], orig_env[i], 1); + else + unsetenv(env_names[i]); + } } static void commit_pager_choice(void) { @@ -84,8 +88,7 @@ static int handle_options(const char ***argv, int *argc, int *envchanged) /* * Check remaining flags. */ - if (!prefixcmp(cmd, "--exec-path")) { - cmd += 11; + if (skip_prefix(cmd, "--exec-path", &cmd)) { if (*cmd == '=') git_set_argv_exec_path(cmd + 1); else { @@ -108,7 +111,7 @@ static int handle_options(const char ***argv, int *argc, int *envchanged) if (envchanged) *envchanged = 1; } else if (!strcmp(cmd, "--no-replace-objects")) { - read_replace_refs = 0; + check_replace_refs = 0; setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1); if (envchanged) *envchanged = 1; @@ -122,8 +125,8 @@ static int handle_options(const char ***argv, int *argc, int *envchanged) *envchanged = 1; (*argv)++; (*argc)--; - } else if (!prefixcmp(cmd, "--git-dir=")) { - setenv(GIT_DIR_ENVIRONMENT, cmd + 10, 1); + } else if (skip_prefix(cmd, "--git-dir=", &cmd)) { + setenv(GIT_DIR_ENVIRONMENT, cmd, 1); if (envchanged) *envchanged = 1; } else if (!strcmp(cmd, "--namespace")) { @@ -136,8 +139,8 @@ static int handle_options(const char ***argv, int *argc, int *envchanged) *envchanged = 1; (*argv)++; (*argc)--; - } else if (!prefixcmp(cmd, "--namespace=")) { - setenv(GIT_NAMESPACE_ENVIRONMENT, cmd + 12, 1); + } else if (skip_prefix(cmd, "--namespace=", &cmd)) { + setenv(GIT_NAMESPACE_ENVIRONMENT, cmd, 1); if (envchanged) *envchanged = 1; } else if (!strcmp(cmd, "--work-tree")) { @@ -150,14 +153,16 @@ static int handle_options(const char ***argv, int *argc, int *envchanged) *envchanged = 1; (*argv)++; (*argc)--; - } else if (!prefixcmp(cmd, "--work-tree=")) { - setenv(GIT_WORK_TREE_ENVIRONMENT, cmd + 12, 1); + } else if (skip_prefix(cmd, "--work-tree=", &cmd)) { + setenv(GIT_WORK_TREE_ENVIRONMENT, cmd, 1); if (envchanged) *envchanged = 1; } else if (!strcmp(cmd, "--bare")) { - static char git_dir[PATH_MAX+1]; + char *cwd = xgetcwd(); is_bare_repository_cfg = 1; - setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 0); + setenv(GIT_DIR_ENVIRONMENT, cwd, 0); + free(cwd); + setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); if (envchanged) *envchanged = 1; } else if (!strcmp(cmd, "-c")) { @@ -168,6 +173,45 @@ static int handle_options(const char ***argv, int *argc, int *envchanged) git_config_push_parameter((*argv)[1]); (*argv)++; (*argc)--; + } else if (!strcmp(cmd, "--literal-pathspecs")) { + setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "1", 1); + if (envchanged) + *envchanged = 1; + } else if (!strcmp(cmd, "--no-literal-pathspecs")) { + setenv(GIT_LITERAL_PATHSPECS_ENVIRONMENT, "0", 1); + if (envchanged) + *envchanged = 1; + } else if (!strcmp(cmd, "--glob-pathspecs")) { + setenv(GIT_GLOB_PATHSPECS_ENVIRONMENT, "1", 1); + if (envchanged) + *envchanged = 1; + } else if (!strcmp(cmd, "--noglob-pathspecs")) { + setenv(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, "1", 1); + if (envchanged) + *envchanged = 1; + } else if (!strcmp(cmd, "--icase-pathspecs")) { + setenv(GIT_ICASE_PATHSPECS_ENVIRONMENT, "1", 1); + if (envchanged) + *envchanged = 1; + } else if (!strcmp(cmd, "--shallow-file")) { + (*argv)++; + (*argc)--; + set_alternate_shallow_file((*argv)[0], 1); + if (envchanged) + *envchanged = 1; + } else if (!strcmp(cmd, "-C")) { + if (*argc < 2) { + fprintf(stderr, "No directory given for -C.\n" ); + usage(git_usage_string); + } + if ((*argv)[1][0]) { + if (chdir((*argv)[1])) + die_errno("Cannot change to '%s'", (*argv)[1]); + if (envchanged) + *envchanged = 1; + } + (*argv)++; + (*argc)--; } else { fprintf(stderr, "Unknown option: %s\n", cmd); usage(git_usage_string); @@ -237,8 +281,7 @@ static int handle_alias(int *argcp, const char ***argv) "trace: alias expansion: %s =>", alias_command); - new_argv = xrealloc(new_argv, sizeof(char *) * - (count + *argcp)); + REALLOC_ARRAY(new_argv, count + *argcp); /* insert after command name */ memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp); @@ -264,6 +307,7 @@ static int handle_alias(int *argcp, const char ***argv) * RUN_SETUP for reading from the configuration file. */ #define NEED_WORK_TREE (1<<3) +#define NO_SETUP (1<<4) struct cmd_struct { const char *cmd; @@ -282,7 +326,7 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv) if (!help) { if (p->option & RUN_SETUP) prefix = setup_git_directory(); - if (p->option & RUN_SETUP_GENTLY) { + else if (p->option & RUN_SETUP_GENTLY) { int nongit_ok; prefix = setup_git_directory_gently(&nongit_ok); } @@ -324,126 +368,146 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv) return 0; } -static void handle_internal_command(int argc, const char **argv) +static struct cmd_struct commands[] = { + { "add", 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 }, + { "blame", cmd_blame, RUN_SETUP }, + { "branch", cmd_branch, RUN_SETUP }, + { "bundle", cmd_bundle, RUN_SETUP_GENTLY }, + { "cat-file", cmd_cat_file, RUN_SETUP }, + { "check-attr", cmd_check_attr, RUN_SETUP }, + { "check-ignore", cmd_check_ignore, RUN_SETUP | NEED_WORK_TREE }, + { "check-mailmap", cmd_check_mailmap, RUN_SETUP }, + { "check-ref-format", cmd_check_ref_format }, + { "checkout", cmd_checkout, RUN_SETUP }, + { "checkout-index", cmd_checkout_index, + RUN_SETUP | NEED_WORK_TREE}, + { "cherry", cmd_cherry, RUN_SETUP }, + { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE }, + { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE }, + { "clone", cmd_clone, NO_SETUP }, + { "column", cmd_column, RUN_SETUP_GENTLY }, + { "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 }, + { "credential", cmd_credential, RUN_SETUP_GENTLY }, + { "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, NO_SETUP }, + { "init-db", cmd_init_db, NO_SETUP }, + { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP }, + { "log", cmd_log, RUN_SETUP }, + { "ls-files", cmd_ls_files, RUN_SETUP }, + { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY }, + { "ls-tree", cmd_ls_tree, RUN_SETUP }, + { "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 }, + { "pack-refs", cmd_pack_refs, RUN_SETUP }, + { "patch-id", cmd_patch_id }, + { "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 }, + { "repack", cmd_repack, RUN_SETUP }, + { "replace", cmd_replace, RUN_SETUP }, + { "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", cmd_show, RUN_SETUP }, + { "show-branch", cmd_show_branch, RUN_SETUP }, + { "show-ref", cmd_show_ref, RUN_SETUP }, + { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE }, + { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE }, + { "stripspace", cmd_stripspace }, + { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP }, + { "tag", cmd_tag, RUN_SETUP }, + { "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 }, + { "upload-archive--writer", cmd_upload_archive_writer }, + { "var", cmd_var, RUN_SETUP_GENTLY }, + { "verify-commit", cmd_verify_commit, RUN_SETUP }, + { "verify-pack", cmd_verify_pack }, + { "verify-tag", cmd_verify_tag, RUN_SETUP }, + { "version", cmd_version }, + { "whatchanged", cmd_whatchanged, RUN_SETUP }, + { "write-tree", cmd_write_tree, RUN_SETUP }, +}; + +static struct cmd_struct *get_builtin(const char *s) +{ + int i; + for (i = 0; i < ARRAY_SIZE(commands); i++) { + struct cmd_struct *p = commands + i; + if (!strcmp(s, p->cmd)) + return p; + } + return NULL; +} + +int is_builtin(const char *s) +{ + return !!get_builtin(s); +} + +static void handle_builtin(int argc, const char **argv) { const char *cmd = argv[0]; - static struct cmd_struct commands[] = { - { "add", 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 }, - { "blame", cmd_blame, RUN_SETUP }, - { "branch", cmd_branch, RUN_SETUP }, - { "bundle", cmd_bundle, RUN_SETUP_GENTLY }, - { "cat-file", cmd_cat_file, RUN_SETUP }, - { "check-attr", cmd_check_attr, RUN_SETUP }, - { "check-ref-format", cmd_check_ref_format }, - { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE }, - { "checkout-index", cmd_checkout_index, - RUN_SETUP | NEED_WORK_TREE}, - { "cherry", cmd_cherry, RUN_SETUP }, - { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE }, - { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE }, - { "clone", cmd_clone }, - { "column", cmd_column, RUN_SETUP_GENTLY }, - { "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 }, - { "credential", cmd_credential, RUN_SETUP_GENTLY }, - { "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-remote", cmd_ls_remote, RUN_SETUP_GENTLY }, - { "ls-tree", cmd_ls_tree, RUN_SETUP }, - { "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 }, - { "pack-refs", cmd_pack_refs, 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_repo_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", cmd_show, RUN_SETUP }, - { "show-branch", cmd_show_branch, RUN_SETUP }, - { "show-ref", cmd_show_ref, RUN_SETUP }, - { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE }, - { "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 }, - { "upload-archive--writer", cmd_upload_archive_writer }, - { "var", cmd_var, RUN_SETUP_GENTLY }, - { "verify-pack", cmd_verify_pack }, - { "verify-tag", cmd_verify_tag, RUN_SETUP }, - { "version", cmd_version }, - { "whatchanged", cmd_whatchanged, RUN_SETUP }, - { "write-tree", cmd_write_tree, RUN_SETUP }, - }; int i; static const char ext[] = STRIP_EXTENSION; + struct cmd_struct *builtin; if (sizeof(ext) > 1) { i = strlen(argv[0]) - strlen(ext); @@ -460,11 +524,12 @@ static void handle_internal_command(int argc, const char **argv) 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)); + builtin = get_builtin(cmd); + if (builtin) { + if (saved_environment && (builtin->option & NO_SETUP)) + restore_env(); + else + exit(run_builtin(builtin, argc, argv)); } } @@ -509,8 +574,8 @@ 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); + /* See if it's a builtin */ + handle_builtin(*argcp, *argv); /* .. then try the external ones */ execv_dashed_external(*argv); @@ -519,7 +584,10 @@ static int run_argv(int *argcp, const char ***argv) * of overriding "git log" with "git show" by having * alias.log = show */ - if (done_alias || !handle_alias(argcp, argv)) + if (done_alias) + break; + save_env(); + if (!handle_alias(argcp, argv)) break; done_alias = 1; } @@ -527,10 +595,32 @@ static int run_argv(int *argcp, const char ***argv) return done_alias; } +/* + * Many parts of Git have subprograms communicate via pipe, expect the + * upstream of a pipe to die with SIGPIPE when the downstream of a + * pipe does not need to read all that is written. Some third-party + * programs that ignore or block SIGPIPE for their own reason forget + * to restore SIGPIPE handling to the default before spawning Git and + * break this carefully orchestrated machinery. + * + * Restore the way SIGPIPE is handled to default, which is what we + * expect. + */ +static void restore_sigpipe_to_default(void) +{ + sigset_t unblock; + + sigemptyset(&unblock); + sigaddset(&unblock, SIGPIPE); + sigprocmask(SIG_UNBLOCK, &unblock, NULL); + signal(SIGPIPE, SIG_DFL); +} -int main(int argc, const char **argv) +int main(int argc, char **av) { + const char **argv = (const char **) av; const char *cmd; + int done_help = 0; startup_info = &git_startup_info; @@ -538,8 +628,19 @@ int main(int argc, const char **argv) if (!cmd) cmd = "git-help"; + /* + * Always open file descriptors 0/1/2 to avoid clobbering files + * in die(). It also avoids messing up when the pipes are dup'ed + * onto stdin/stdout/stderr in the child processes we spawn. + */ + sanitize_stdfds(); + + restore_sigpipe_to_default(); + git_setup_gettext(); + trace_command_performance(argv); + /* * "git-xxxx" is the same as "git xxxx", but we obviously: * @@ -547,14 +648,13 @@ int main(int argc, const char **argv) * - 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. + * So we just directly call the builtin handler, and die if + * that one cannot handle it. */ - if (!prefixcmp(cmd, "git-")) { - cmd += 4; + if (skip_prefix(cmd, "git-", &cmd)) { argv[0] = cmd; - handle_internal_command(argc, argv); - die("cannot handle %s internally", cmd); + handle_builtin(argc, argv); + die("cannot handle %s as a builtin", cmd); } /* Look for flags.. */ @@ -562,14 +662,14 @@ int main(int argc, const char **argv) argc--; handle_options(&argv, &argc, NULL); if (argc > 0) { - if (!prefixcmp(argv[0], "--")) - argv[0] += 2; + /* translate --help and --version into commands */ + skip_prefix(argv[0], "--", &argv[0]); } 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); + printf("\n%s\n", _(git_more_info_string)); exit(1); } cmd = argv[0]; @@ -583,9 +683,7 @@ int main(int argc, const char **argv) setup_path(); while (1) { - static int done_help = 0; - static int was_alias = 0; - was_alias = run_argv(&argc, &argv); + int was_alias = run_argv(&argc, &argv); if (errno != ENOENT) break; if (was_alias) { |