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read-tree: deprecate syntax without tree-ish args 

Currently, read-tree can be run without tree-ish arguments, in which
case it will empty the index. Since this behavior is undocumented and
perhaps a bit too invasive to be the "default" action for read-tree,
deprecate it in favor of a new --empty option that does the same thing.

Signed-off-by: Jan Krüger <jk@jk.gs>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jan Krüger 2010-09-10 15:28:59 +02:00 committed by Junio C Hamano
parent 8ac8cf5bc1
commit fb1bb96516
2 changed files with 14 additions and 2 deletions
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6
Documentation/git-read-tree.txt
View File

@ -11,7 +11,7 @@ SYNOPSIS
'git read-tree' [[-m [--trivial] [--aggressive] | --reset | --prefix=<prefix>]
[-u [--exclude-per-directory=<gitignore>] | -i]]
[--index-output=<file>] [--no-sparse-checkout]
<tree-ish1> [<tree-ish2> [<tree-ish3>]]
(--empty | <tree-ish1> [<tree-ish2> [<tree-ish3>]])
DESCRIPTION
@ -114,6 +114,10 @@ OPTIONS
Disable sparse checkout support even if `core.sparseCheckout`
is true.
--empty::
Instead of reading tree object(s) into the index, just empty
it.
<tree-ish#>::
The id of the tree object(s) to be read/merged.

10
builtin/read-tree.c
View File

@ -16,6 +16,7 @@
#include "resolve-undo.h"
static int nr_trees;
static int read_empty;
static struct tree *trees[MAX_UNPACK_TREES];
static int list_tree(unsigned char *sha1)
@ -32,7 +33,7 @@ static int list_tree(unsigned char *sha1)
}
static const char * const read_tree_usage[] = {
"git read-tree [[-m [--trivial] [--aggressive] | --reset | --prefix=<prefix>] [-u [--exclude-per-directory=<gitignore>] | -i]] [--no-sparse-checkout] [--index-output=<file>] <tree-ish1> [<tree-ish2> [<tree-ish3>]]",
"git read-tree [[-m [--trivial] [--aggressive] | --reset | --prefix=<prefix>] [-u [--exclude-per-directory=<gitignore>] | -i]] [--no-sparse-checkout] [--index-output=<file>] (--empty | <tree-ish1> [<tree-ish2> [<tree-ish3>]])",
NULL
};
@ -106,6 +107,8 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
{ OPTION_CALLBACK, 0, "index-output", NULL, "FILE",
"write resulting index to <FILE>",
PARSE_OPT_NONEG, index_output_cb },
OPT_SET_INT(0, "empty", &read_empty,
"only empty the index", 1),
OPT__VERBOSE(&opts.verbose_update),
OPT_GROUP("Merging"),
OPT_SET_INT('m', NULL, &opts.merge,
@ -166,6 +169,11 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
die("failed to unpack tree object %s", arg);
stage++;
}
if (nr_trees == 0 && !read_empty)
warning("read-tree: emptying the index with no arguments is deprecated; use --empty");
else if (nr_trees > 0 && read_empty)
die("passing trees as arguments contradicts --empty");
if (1 < opts.index_only + opts.update)
die("-u and -i at the same time makes no sense");
if ((opts.update||opts.index_only) && !opts.merge)