#include "cache.h" #include "config.h" #include "builtin.h" #include "exec_cmd.h" #include "run-command.h" #include "levenshtein.h" #include "help.h" #include "common-cmds.h" #include "string-list.h" #include "column.h" #include "version.h" #include "refs.h" #include "parse-options.h" void add_cmdname(struct cmdnames *cmds, const char *name, int len) { struct cmdname *ent; FLEX_ALLOC_MEM(ent, name, name, len); ent->len = len; ALLOC_GROW(cmds->names, cmds->cnt + 1, cmds->alloc); cmds->names[cmds->cnt++] = ent; } static void clean_cmdnames(struct cmdnames *cmds) { int i; for (i = 0; i < cmds->cnt; ++i) free(cmds->names[i]); free(cmds->names); cmds->cnt = 0; cmds->alloc = 0; } static int cmdname_compare(const void *a_, const void *b_) { struct cmdname *a = *(struct cmdname **)a_; struct cmdname *b = *(struct cmdname **)b_; return strcmp(a->name, b->name); } static void uniq(struct cmdnames *cmds) { int i, j; if (!cmds->cnt) return; for (i = j = 1; i < cmds->cnt; i++) { if (!strcmp(cmds->names[i]->name, cmds->names[j-1]->name)) free(cmds->names[i]); else cmds->names[j++] = cmds->names[i]; } cmds->cnt = j; } void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes) { int ci, cj, ei; int cmp; ci = cj = ei = 0; while (ci < cmds->cnt && ei < excludes->cnt) { cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name); if (cmp < 0) cmds->names[cj++] = cmds->names[ci++]; else if (cmp == 0) { ei++; free(cmds->names[ci++]); } else if (cmp > 0) ei++; } while (ci < cmds->cnt) cmds->names[cj++] = cmds->names[ci++]; cmds->cnt = cj; } static void pretty_print_cmdnames(struct cmdnames *cmds, unsigned int colopts) { struct string_list list = STRING_LIST_INIT_NODUP; struct column_options copts; int i; for (i = 0; i < cmds->cnt; i++) string_list_append(&list, cmds->names[i]->name); /* * always enable column display, we only consult column.* * about layout strategy and stuff */ colopts = (colopts & ~COL_ENABLE_MASK) | COL_ENABLED; memset(&copts, 0, sizeof(copts)); copts.indent = " "; copts.padding = 2; print_columns(&list, colopts, &copts); string_list_clear(&list, 0); } static void list_commands_in_dir(struct cmdnames *cmds, const char *path, const char *prefix) { DIR *dir = opendir(path); struct dirent *de; struct strbuf buf = STRBUF_INIT; int len; if (!dir) return; if (!prefix) prefix = "git-"; strbuf_addf(&buf, "%s/", path); len = buf.len; while ((de = readdir(dir)) != NULL) { const char *ent; size_t entlen; if (!skip_prefix(de->d_name, prefix, &ent)) continue; strbuf_setlen(&buf, len); strbuf_addstr(&buf, de->d_name); if (!is_executable(buf.buf)) continue; entlen = strlen(ent); strip_suffix(ent, ".exe", &entlen); add_cmdname(cmds, ent, entlen); } closedir(dir); strbuf_release(&buf); } void load_command_list(const char *prefix, struct cmdnames *main_cmds, struct cmdnames *other_cmds) { const char *env_path = getenv("PATH"); const char *exec_path = git_exec_path(); if (exec_path) { list_commands_in_dir(main_cmds, exec_path, prefix); QSORT(main_cmds->names, main_cmds->cnt, cmdname_compare); uniq(main_cmds); } if (env_path) { char *paths, *path, *colon; path = paths = xstrdup(env_path); while (1) { if ((colon = strchr(path, PATH_SEP))) *colon = 0; if (!exec_path || strcmp(path, exec_path)) list_commands_in_dir(other_cmds, path, prefix); if (!colon) break; path = colon + 1; } free(paths); QSORT(other_cmds->names, other_cmds->cnt, cmdname_compare); uniq(other_cmds); } exclude_cmds(other_cmds, main_cmds); } void list_commands(unsigned int colopts, struct cmdnames *main_cmds, struct cmdnames *other_cmds) { if (main_cmds->cnt) { const char *exec_path = git_exec_path(); printf_ln(_("available git commands in '%s'"), exec_path); putchar('\n'); pretty_print_cmdnames(main_cmds, colopts); putchar('\n'); } if (other_cmds->cnt) { printf_ln(_("git commands available from elsewhere on your $PATH")); putchar('\n'); pretty_print_cmdnames(other_cmds, colopts); putchar('\n'); } } static int cmd_group_cmp(const void *elem1, const void *elem2) { const struct cmdname_help *e1 = elem1; const struct cmdname_help *e2 = elem2; if (e1->group < e2->group) return -1; if (e1->group > e2->group) return 1; return strcmp(e1->name, e2->name); } void list_common_cmds_help(void) { int i, longest = 0; int current_grp = -1; for (i = 0; i < ARRAY_SIZE(common_cmds); i++) { if (longest < strlen(common_cmds[i].name)) longest = strlen(common_cmds[i].name); } QSORT(common_cmds, ARRAY_SIZE(common_cmds), cmd_group_cmp); puts(_("These are common Git commands used in various situations:")); for (i = 0; i < ARRAY_SIZE(common_cmds); i++) { if (common_cmds[i].group != current_grp) { printf("\n%s\n", _(common_cmd_groups[common_cmds[i].group])); current_grp = common_cmds[i].group; } printf(" %s ", common_cmds[i].name); mput_char(' ', longest - strlen(common_cmds[i].name)); puts(_(common_cmds[i].help)); } } int is_in_cmdlist(struct cmdnames *c, const char *s) { int i; for (i = 0; i < c->cnt; i++) if (!strcmp(s, c->names[i]->name)) return 1; return 0; } static int autocorrect; static struct cmdnames aliases; static int git_unknown_cmd_config(const char *var, const char *value, void *cb) { const char *p; if (!strcmp(var, "help.autocorrect")) autocorrect = git_config_int(var,value); /* Also use aliases for command lookup */ if (skip_prefix(var, "alias.", &p)) add_cmdname(&aliases, p, strlen(p)); return git_default_config(var, value, cb); } static int levenshtein_compare(const void *p1, const void *p2) { const struct cmdname *const *c1 = p1, *const *c2 = p2; const char *s1 = (*c1)->name, *s2 = (*c2)->name; int l1 = (*c1)->len; int l2 = (*c2)->len; return l1 != l2 ? l1 - l2 : strcmp(s1, s2); } static void add_cmd_list(struct cmdnames *cmds, struct cmdnames *old) { int i; ALLOC_GROW(cmds->names, cmds->cnt + old->cnt, cmds->alloc); for (i = 0; i < old->cnt; i++) cmds->names[cmds->cnt++] = old->names[i]; FREE_AND_NULL(old->names); old->cnt = 0; } /* An empirically derived magic number */ #define SIMILARITY_FLOOR 7 #define SIMILAR_ENOUGH(x) ((x) < SIMILARITY_FLOOR) static const char bad_interpreter_advice[] = N_("'%s' appears to be a git command, but we were not\n" "able to execute it. Maybe git-%s is broken?"); const char *help_unknown_cmd(const char *cmd) { int i, n, best_similarity = 0; struct cmdnames main_cmds, other_cmds; memset(&main_cmds, 0, sizeof(main_cmds)); memset(&other_cmds, 0, sizeof(other_cmds)); memset(&aliases, 0, sizeof(aliases)); read_early_config(git_unknown_cmd_config, NULL); load_command_list("git-", &main_cmds, &other_cmds); add_cmd_list(&main_cmds, &aliases); add_cmd_list(&main_cmds, &other_cmds); QSORT(main_cmds.names, main_cmds.cnt, cmdname_compare); uniq(&main_cmds); /* This abuses cmdname->len for levenshtein distance */ for (i = 0, n = 0; i < main_cmds.cnt; i++) { int cmp = 0; /* avoid compiler stupidity */ const char *candidate = main_cmds.names[i]->name; /* * An exact match means we have the command, but * for some reason exec'ing it gave us ENOENT; probably * it's a bad interpreter in the #! line. */ if (!strcmp(candidate, cmd)) die(_(bad_interpreter_advice), cmd, cmd); /* Does the candidate appear in common_cmds list? */ while (n < ARRAY_SIZE(common_cmds) && (cmp = strcmp(common_cmds[n].name, candidate)) < 0) n++; if ((n < ARRAY_SIZE(common_cmds)) && !cmp) { /* Yes, this is one of the common commands */ n++; /* use the entry from common_cmds[] */ if (starts_with(candidate, cmd)) { /* Give prefix match a very good score */ main_cmds.names[i]->len = 0; continue; } } main_cmds.names[i]->len = levenshtein(cmd, candidate, 0, 2, 1, 3) + 1; } QSORT(main_cmds.names, main_cmds.cnt, levenshtein_compare); if (!main_cmds.cnt) die(_("Uh oh. Your system reports no Git commands at all.")); /* skip and count prefix matches */ for (n = 0; n < main_cmds.cnt && !main_cmds.names[n]->len; n++) ; /* still counting */ if (main_cmds.cnt <= n) { /* prefix matches with everything? that is too ambiguous */ best_similarity = SIMILARITY_FLOOR + 1; } else { /* count all the most similar ones */ for (best_similarity = main_cmds.names[n++]->len; (n < main_cmds.cnt && best_similarity == main_cmds.names[n]->len); n++) ; /* still counting */ } if (autocorrect && n == 1 && SIMILAR_ENOUGH(best_similarity)) { const char *assumed = main_cmds.names[0]->name; main_cmds.names[0] = NULL; clean_cmdnames(&main_cmds); fprintf_ln(stderr, _("WARNING: You called a Git command named '%s', " "which does not exist."), cmd); if (autocorrect < 0) fprintf_ln(stderr, _("Continuing under the assumption that " "you meant '%s'."), assumed); else { fprintf_ln(stderr, _("Continuing in %0.1f seconds, " "assuming that you meant '%s'."), (float)autocorrect/10.0, assumed); sleep_millisec(autocorrect * 100); } return assumed; } fprintf_ln(stderr, _("git: '%s' is not a git command. See 'git --help'."), cmd); if (SIMILAR_ENOUGH(best_similarity)) { fprintf_ln(stderr, Q_("\nThe most similar command is", "\nThe most similar commands are", n)); for (i = 0; i < n; i++) fprintf(stderr, "\t%s\n", main_cmds.names[i]->name); } exit(1); } int cmd_version(int argc, const char **argv, const char *prefix) { int build_options = 0; const char * const usage[] = { N_("git version [<options>]"), NULL }; struct option options[] = { OPT_BOOL(0, "build-options", &build_options, "also print build options"), OPT_END() }; argc = parse_options(argc, argv, prefix, options, usage, 0); /* * The format of this string should be kept stable for compatibility * with external projects that rely on the output of "git version". * * Always show the version, even if other options are given. */ printf("git version %s\n", git_version_string); if (build_options) { printf("sizeof-long: %d\n", (int)sizeof(long)); /* NEEDSWORK: also save and output GIT-BUILD_OPTIONS? */ } return 0; } struct similar_ref_cb { const char *base_ref; struct string_list *similar_refs; }; static int append_similar_ref(const char *refname, const struct object_id *oid, int flags, void *cb_data) { struct similar_ref_cb *cb = (struct similar_ref_cb *)(cb_data); char *branch = strrchr(refname, '/') + 1; const char *remote; /* A remote branch of the same name is deemed similar */ if (skip_prefix(refname, "refs/remotes/", &remote) && !strcmp(branch, cb->base_ref)) string_list_append(cb->similar_refs, remote); return 0; } static struct string_list guess_refs(const char *ref) { struct similar_ref_cb ref_cb; struct string_list similar_refs = STRING_LIST_INIT_NODUP; ref_cb.base_ref = ref; ref_cb.similar_refs = &similar_refs; for_each_ref(append_similar_ref, &ref_cb); return similar_refs; } void help_unknown_ref(const char *ref, const char *cmd, const char *error) { int i; struct string_list suggested_refs = guess_refs(ref); fprintf_ln(stderr, _("%s: %s - %s"), cmd, ref, error); if (suggested_refs.nr > 0) { fprintf_ln(stderr, Q_("\nDid you mean this?", "\nDid you mean one of these?", suggested_refs.nr)); for (i = 0; i < suggested_refs.nr; i++) fprintf(stderr, "\t%s\n", suggested_refs.items[i].string); } string_list_clear(&suggested_refs, 0); exit(1); }