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8af84dadb1
This patch introduces a modified Damerau-Levenshtein algorithm into Git's code base, and uses it with the following penalties to show some similar commands when an unknown command was encountered: swap = 0, insertion = 1, substitution = 2, deletion = 4 A typical output would now look like this: $ git sm git: 'sm' is not a git-command. See 'git --help'. Did you mean one of these? am rm The cut-off is at similarity rating 6, which was empirically determined to give sensible results. As a convenience, if there is only one candidate, Git continues under the assumption that the user mistyped it. Example: $ git reabse WARNING: You called a Git program named 'reabse', which does not exist. Continuing under the assumption that you meant 'rebase' [...] Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Alex Riesen <raa.lkml@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
30 lines
778 B
C
30 lines
778 B
C
#ifndef HELP_H
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#define HELP_H
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struct cmdnames {
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int alloc;
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int cnt;
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struct cmdname {
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size_t len; /* also used for similarity index in help.c */
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char name[FLEX_ARRAY];
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} **names;
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};
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static inline void mput_char(char c, unsigned int num)
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{
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while(num--)
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putchar(c);
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}
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unsigned int load_command_list(const char *prefix,
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struct cmdnames *main_cmds,
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struct cmdnames *other_cmds);
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void add_cmdname(struct cmdnames *cmds, const char *name, int len);
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/* Here we require that excludes is a sorted list. */
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void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes);
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int is_in_cmdlist(struct cmdnames *c, const char *s);
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void list_commands(const char *title, unsigned int longest,
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struct cmdnames *main_cmds, struct cmdnames *other_cmds);
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#endif /* HELP_H */
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