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builtin/config: check for writeability after source is set up

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The `check_write()` function verifies that we do not try to write to a
config source that cannot be written to, like for example stdin. But
while the new subcommands do call this function, they do so before
calling `handle_config_location()`. Consequently, we only end up
checking the default config location for writeability, not the location
that was actually specified by the caller of git-config(1).

Fix this by calling `check_write()` after `handle_config_location()`. We
will further clarify the relationship between those two functions in a
subsequent commit where we remove the global state that both implicitly
rely on.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Patrick Steinhardt 2024-05-15 08:42:02 +02:00 committed by Junio C Hamano
parent 9cab5e8078
commit e44b018c52
2 changed files with 11 additions and 5 deletions
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10
builtin/config.c
View file

@ -843,7 +843,6 @@ static int cmd_config_set(int argc, const char **argv, const char *prefix)
argc = parse_options(argc, argv, prefix, opts, builtin_config_set_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
check_write();
check_argc(argc, 2, 2);
if ((flags & CONFIG_FLAGS_FIXED_VALUE) && !value_pattern)
@ -856,6 +855,7 @@ static int cmd_config_set(int argc, const char **argv, const char *prefix)
comment = git_config_prepare_comment_string(comment_arg);
handle_config_location(prefix);
check_write();
value = normalize_value(argv[0], argv[1], &default_kvi);
@ -891,13 +891,13 @@ static int cmd_config_unset(int argc, const char **argv, const char *prefix)
argc = parse_options(argc, argv, prefix, opts, builtin_config_unset_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
check_write();
check_argc(argc, 1, 1);
if ((flags & CONFIG_FLAGS_FIXED_VALUE) && !value_pattern)
die(_("--fixed-value only applies with 'value-pattern'"));
handle_config_location(prefix);
check_write();
if ((flags & CONFIG_FLAGS_MULTI_REPLACE) || value_pattern)
return git_config_set_multivar_in_file_gently(given_config_source.file,
@ -918,10 +918,10 @@ static int cmd_config_rename_section(int argc, const char **argv, const char *pr
argc = parse_options(argc, argv, prefix, opts, builtin_config_rename_section_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
check_write();
check_argc(argc, 2, 2);
handle_config_location(prefix);
check_write();
ret = git_config_rename_section_in_file(given_config_source.file,
argv[0], argv[1]);
@ -943,10 +943,10 @@ static int cmd_config_remove_section(int argc, const char **argv, const char *pr
argc = parse_options(argc, argv, prefix, opts, builtin_config_remove_section_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
check_write();
check_argc(argc, 1, 1);
handle_config_location(prefix);
check_write();
ret = git_config_rename_section_in_file(given_config_source.file,
argv[0], NULL);
@ -997,10 +997,10 @@ static int cmd_config_edit(int argc, const char **argv, const char *prefix)
};
argc = parse_options(argc, argv, prefix, opts, builtin_config_edit_usage, 0);
check_write();
check_argc(argc, 0, 0);
handle_config_location(prefix);
check_write();
return show_editor();
}

6
t/t1300-config.sh
View file

@ -2835,6 +2835,12 @@ test_expect_success 'specifying multiple modes causes failure' '
test_cmp expect err
'
test_expect_success 'writing to stdin is rejected' '
echo "fatal: writing to stdin is not supported" >expect &&
test_must_fail git config ${mode_set} --file - foo.bar baz 2>err &&
test_cmp expect err
'
done
test_done