pager: use callbacks instead of configset

While the cached configset interface is more pleasant to
use, it is not appropriate for "early" config like pager
setup, which must sometimes do tricky things like reading
from ".git/config" even when we have not set up the
repository.

As a preparatory step to handling these cases better, let's
switch back to using the callback interface, which gives us
more control.

Note that this is essentially a revert of 586f414 (pager.c:
replace `git_config()` with `git_config_get_value()`,
2014-08-07), but with some minor style fixups and
modernizations.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2016-09-12 20:23:52 -07:00 committed by Junio C Hamano
parent c0c08897c4
commit 6a1e1bc0a1

51
pager.c
View File

@ -159,23 +159,42 @@ int decimal_width(uintmax_t number)
return width; return width;
} }
struct pager_command_config_data {
const char *cmd;
int want;
char *value;
};
static int pager_command_config(const char *var, const char *value, void *vdata)
{
struct pager_command_config_data *data = vdata;
const char *cmd;
if (skip_prefix(var, "pager.", &cmd) && !strcmp(cmd, data->cmd)) {
int b = git_config_maybe_bool(var, value);
if (b >= 0)
data->want = b;
else {
data->want = 1;
data->value = xstrdup(value);
}
}
return 0;
}
/* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */ /* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */
int check_pager_config(const char *cmd) int check_pager_config(const char *cmd)
{ {
int want = -1; struct pager_command_config_data data;
struct strbuf key = STRBUF_INIT;
const char *value = NULL; data.cmd = cmd;
strbuf_addf(&key, "pager.%s", cmd); data.want = -1;
if (git_config_key_is_valid(key.buf) && data.value = NULL;
!git_config_get_value(key.buf, &value)) {
int b = git_config_maybe_bool(key.buf, value); git_config(pager_command_config, &data);
if (b >= 0)
want = b; if (data.value)
else { pager_program = data.value;
want = 1; return data.want;
pager_program = xstrdup(value);
}
}
strbuf_release(&key);
return want;
} }