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pager: use callbacks instead of configset

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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
1 changed files with 35 additions and 16 deletions
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51
pager.c
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@ -159,23 +159,42 @@ int decimal_width(uintmax_t number)
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" */
int check_pager_config(const char *cmd)
{
int want = -1;
struct strbuf key = STRBUF_INIT;
const char *value = NULL;
strbuf_addf(&key, "pager.%s", cmd);
if (git_config_key_is_valid(key.buf) &&
!git_config_get_value(key.buf, &value)) {
int b = git_config_maybe_bool(key.buf, value);
if (b >= 0)
want = b;
else {
want = 1;
pager_program = xstrdup(value);
}
}
strbuf_release(&key);
return want;
struct pager_command_config_data data;
data.cmd = cmd;
data.want = -1;
data.value = NULL;
git_config(pager_command_config, &data);
if (data.value)
pager_program = data.value;
return data.want;
}