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help: add help_unknown_ref()

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When the user gives an unknown string to a command that expects to
get a ref, we could be more helpful than just saying "that's not a
ref" and die.

Add helper function help_unknown_ref() to take care of displaying an
error message along with a list of suggested refs the user might
have meant.  An interaction with "git merge" might go like this:

	$ git merge foo
	merge: foo - not something we can merge

	Did you mean one of these?
	    origin/foo
	    upstream/foo

Signed-off-by: Vikrant Varma <vikrant.varma94@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Vikrant Varma
2013-05-04 05:34:19 +05:30
committed by Junio C Hamano
parent 9b795193a6
commit e56181060e
2 changed files with 55 additions and 0 deletions
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5
help.h
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@@ -27,4 +27,9 @@ extern void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes);
extern int is_in_cmdlist(struct cmdnames *cmds, const char *name);
extern void list_commands(unsigned int colopts, struct cmdnames *main_cmds, struct cmdnames *other_cmds);
/*
* call this to die(), when it is suspected that the user mistyped a
* ref to the command, to give suggested "correct" refs.
*/
extern void help_unknown_ref(const char *ref, const char *cmd, const char *error);
#endif /* HELP_H */