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ref-filter: add %(rest) atom

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%(rest) is a atom used for cat-file batch mode, which can split
the input lines at the first whitespace boundary, all characters
before that whitespace are considered to be the object name;
characters after that first run of whitespace (i.e., the "rest"
of the line) are output in place of the %(rest) atom.

In order to let "cat-file --batch=%(rest)" use the ref-filter
interface, add %(rest) atom for ref-filter.

Introduce the reject_atom() to reject the atom %(rest) for
"git for-each-ref", "git branch", "git tag" and "git verify-tag".

Reviewed-by: Jacob Keller <jacob.keller@gmail.com>
Suggected-by: Jacob Keller <jacob.keller@gmail.com>
Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Hariom Verma <hariom18599@gmail.com>
Signed-off-by: ZheNing Hu <adlternative@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
ZheNing Hu
2021-07-26 03:26:50 +00:00
committed by Junio C Hamano
parent e85fcb355a
commit b9dee075eb
6 changed files with 45 additions and 1 deletions
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25
ref-filter.c
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@ -157,6 +157,7 @@ enum atom_type {
ATOM_IF,
ATOM_THEN,
ATOM_ELSE,
ATOM_REST,
};
/*
@ -559,6 +560,15 @@ static int if_atom_parser(struct ref_format *format, struct used_atom *atom,
return 0;
}
static int rest_atom_parser(struct ref_format *format, struct used_atom *atom,
const char *arg, struct strbuf *err)
{
if (arg)
return strbuf_addf_ret(err, -1, _("%%(rest) does not take arguments"));
format->use_rest = 1;
return 0;
}
static int head_atom_parser(struct ref_format *format, struct used_atom *atom,
const char *arg, struct strbuf *unused_err)
{
@ -615,6 +625,7 @@ static struct {
[ATOM_IF] = { "if", SOURCE_NONE, FIELD_STR, if_atom_parser },
[ATOM_THEN] = { "then", SOURCE_NONE },
[ATOM_ELSE] = { "else", SOURCE_NONE },
[ATOM_REST] = { "rest", SOURCE_NONE, FIELD_STR, rest_atom_parser },
/*
* Please update $__git_ref_fieldlist in git-completion.bash
* when you add new atoms
@ -992,6 +1003,11 @@ static const char *find_next(const char *cp)
return NULL;
}
static int reject_atom(enum atom_type atom_type)
{
return atom_type == ATOM_REST;
}
/*
* Make sure the format string is well formed, and parse out
* the used atoms.
@ -1012,6 +1028,8 @@ int verify_ref_format(struct ref_format *format)
at = parse_ref_filter_atom(format, sp + 2, ep, &err);
if (at < 0)
die("%s", err.buf);
if (reject_atom(used_atom[at].atom_type))
die(_("this command reject atom %%(%.*s)"), (int)(ep - sp - 2), sp + 2);
if ((format->quote_style == QUOTE_PYTHON ||
format->quote_style == QUOTE_SHELL ||
@ -1931,6 +1949,12 @@ static int populate_value(struct ref_array_item *ref, struct strbuf *err)
v->handler = else_atom_handler;
v->s = xstrdup("");
continue;
} else if (atom_type == ATOM_REST) {
if (ref->rest)
v->s = xstrdup(ref->rest);
else
v->s = xstrdup("");
continue;
} else
continue;
@ -2148,6 +2172,7 @@ static struct ref_array_item *new_ref_array_item(const char *refname,
FLEX_ALLOC_STR(ref, refname, refname);
oidcpy(&ref->objectname, oid);
ref->rest = NULL;
return ref;
}