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parse-options: support --git-completion-helper

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This option is designed to be used by git-completion.bash. For many
simple cases, what we do in there is usually

    __gitcomp "lots of completion options"

which has to be manually updated when a new user-visible option is
added. With support from parse-options, we can write

    __gitcomp "$(git command --git-completion-helper)"

and get that list directly from the parser for free. Dangerous/Unpopular
options could be hidden with the new "NOCOMPLETE" flag.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Nguyễn Thái Ngọc Duy
2018-02-09 18:01:40 +07:00
committed by Junio C Hamano
parent 5be1f00a9a
commit b9d7f4b4db
2 changed files with 48 additions and 1 deletions
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5
parse-options.h
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@ -38,7 +38,8 @@ enum parse_opt_option_flags {
PARSE_OPT_LASTARG_DEFAULT = 16,
PARSE_OPT_NODASH = 32,
PARSE_OPT_LITERAL_ARGHELP = 64,
PARSE_OPT_SHELL_EVAL = 256
PARSE_OPT_SHELL_EVAL = 256,
PARSE_OPT_NOCOMPLETE = 512
};
struct option;
@ -89,6 +90,8 @@ typedef int parse_opt_ll_cb(struct parse_opt_ctx_t *ctx,
* PARSE_OPT_LITERAL_ARGHELP: says that argh shouldn't be enclosed in brackets
* (i.e. '<argh>') in the help message.
* Useful for options with multiple parameters.
* PARSE_OPT_NOCOMPLETE: by default all visible options are completable
* by git-completion.bash. This option suppresses that.
*
* `callback`::
* pointer to the callback to use for OPTION_CALLBACK or