From 06500a029953164a3110c705ae579ef43548d006 Mon Sep 17 00:00:00 2001 From: Johannes Sixt Date: Tue, 15 Dec 2009 08:57:18 +0100 Subject: [PATCH] help.autocorrect: do not run a command if the command given is junk If a given command is not found, then help.c tries to guess which one the user could have meant. If help.autocorrect is 0 or unset, then a list of suggestions is given as long as the dissimilarity between the given command and the candidates is not excessively high. But if help.autocorrect was non-zero (i.e., a delay after which the command is run automatically), the latter restriction on dissimilarity was not obeyed. In my case, this happened: $ git ..daab02 WARNING: You called a Git command named '..daab02', which does not exist. Continuing under the assumption that you meant 'read-tree' in 4.0 seconds automatically... The patch reuses the similarity limit that is also applied when the list of suggested commands is printed. Signed-off-by: Johannes Sixt Signed-off-by: Junio C Hamano --- help.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/help.c b/help.c index e8db31f60..9da97d746 100644 --- a/help.c +++ b/help.c @@ -297,6 +297,9 @@ static void add_cmd_list(struct cmdnames *cmds, struct cmdnames *old) old->names = NULL; } +/* An empirically derived magic number */ +#define SIMILAR_ENOUGH(x) ((x) < 6) + const char *help_unknown_cmd(const char *cmd) { int i, n, best_similarity = 0; @@ -331,7 +334,7 @@ const char *help_unknown_cmd(const char *cmd) n = 1; while (n < main_cmds.cnt && best_similarity == main_cmds.names[n]->len) ++n; - if (autocorrect && n == 1) { + 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); @@ -349,7 +352,7 @@ const char *help_unknown_cmd(const char *cmd) fprintf(stderr, "git: '%s' is not a git-command. See 'git --help'.\n", cmd); - if (best_similarity < 6) { + if (SIMILAR_ENOUGH(best_similarity)) { fprintf(stderr, "\nDid you mean %s?\n", n < 2 ? "this": "one of these"); -- 2.30.2