diff options
Diffstat (limited to 'help.c')
| -rw-r--r-- | help.c | 89 |
1 files changed, 88 insertions, 1 deletions
@@ -1,6 +1,7 @@ #include "cache.h" #include "builtin.h" #include "exec_cmd.h" +#include "levenshtein.h" #include "help.h" /* most GUI terminals set COLUMNS (although some don't export it) */ @@ -37,6 +38,16 @@ void add_cmdname(struct cmdnames *cmds, const char *name, int len) 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_; @@ -250,9 +261,85 @@ int is_in_cmdlist(struct cmdnames *c, const char *s) return 0; } -void help_unknown_cmd(const char *cmd) +static int autocorrect; + +static int git_unknown_cmd_config(const char *var, const char *value, void *cb) +{ + if (!strcmp(var, "help.autocorrect")) + autocorrect = git_config_int(var,value); + + 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); +} + +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(main_cmds)); + + git_config(git_unknown_cmd_config, NULL); + + load_command_list("git-", &main_cmds, &other_cmds); + + ALLOC_GROW(main_cmds.names, main_cmds.cnt + other_cmds.cnt, + main_cmds.alloc); + memcpy(main_cmds.names + main_cmds.cnt, other_cmds.names, + other_cmds.cnt * sizeof(other_cmds.names[0])); + main_cmds.cnt += other_cmds.cnt; + free(other_cmds.names); + + /* This reuses cmdname->len for similarity index */ + for (i = 0; i < main_cmds.cnt; ++i) + main_cmds.names[i]->len = + levenshtein(cmd, main_cmds.names[i]->name, 0, 2, 1, 4); + + qsort(main_cmds.names, main_cmds.cnt, + sizeof(*main_cmds.names), levenshtein_compare); + + if (!main_cmds.cnt) + die ("Uh oh. Your system reports no Git commands at all."); + + best_similarity = main_cmds.names[0]->len; + n = 1; + while (n < main_cmds.cnt && best_similarity == main_cmds.names[n]->len) + ++n; + if (autocorrect && n == 1) { + const char *assumed = main_cmds.names[0]->name; + main_cmds.names[0] = NULL; + clean_cmdnames(&main_cmds); + fprintf(stderr, "WARNING: You called a Git program named '%s', " + "which does not exist.\n" + "Continuing under the assumption that you meant '%s'\n", + cmd, assumed); + if (autocorrect > 0) { + fprintf(stderr, "in %0.1f seconds automatically...\n", + (float)autocorrect/10.0); + poll(NULL, 0, autocorrect * 100); + } + return assumed; + } + fprintf(stderr, "git: '%s' is not a git-command. See 'git --help'.\n", cmd); + + if (best_similarity < 6) { + fprintf(stderr, "\nDid you mean %s?\n", + n < 2 ? "this": "one of these"); + + for (i = 0; i < n; i++) + fprintf(stderr, "\t%s\n", main_cmds.names[i]->name); + } + exit(1); } |