1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
#include <assert.h>
#include <stdio.h>
#include "setup.h"
#include "til_settings.h"
#include "til_setup.h"
#include "til_str.h"
#include "til_util.h"
/* Helper for turning the failed desc into a char * and storing it in the provided place before propagating
* the error return value
*/
static int setup_ret_failed_desc_path(const til_setting_desc_t *failed_desc, int r, const char **res_failed_desc_path)
{
til_str_t *str;
assert(res_failed_desc_path);
str = til_str_new("");
if (!str)
return r;
if (til_setting_desc_strprint_path(failed_desc, str) < 0)
return r;
*res_failed_desc_path = til_str_to_buf(str, NULL);
return r;
}
/* returns negative on error, otherwise number of additions made to settings */
int setup_interactively(til_settings_t *settings, int (*setup_func)(const til_settings_t *settings, til_setting_t **res_setting, const til_setting_desc_t **res_desc, til_setup_t **res_setup), int defaults, til_setup_t **res_setup, const char **res_failed_desc_path)
{
unsigned additions = 0;
char buf[256] = "\n";
til_setting_t *setting;
const til_setting_desc_t *desc;
int r;
assert(settings);
assert(setup_func);
/* TODO: regex and error handling */
while ((r = setup_func(settings, &setting, &desc, res_setup)) > 0) {
assert(desc);
additions++;
/* if setup_func() has returned a description for an undescribed preexisting setting,
* validate its value against the description and assign the description if it passes.
*/
if (setting && !setting->desc) {
/* Apply override before, or after the spec_check()? unclear.
* TODO This probably also needs to move into a til_settings helper
*/
if (desc->spec.override) {
const char *o;
o = desc->spec.override(setting->value);
if (!o)
return -ENOMEM;
if (o != setting->value) {
r = til_setting_set_raw_value(setting, o);
free((void *)o);
if (r < 0)
return -ENOMEM;
}
}
r = til_setting_check_spec(setting, &desc->spec);
if (r < 0)
return setup_ret_failed_desc_path(desc, r, res_failed_desc_path);
if (desc->spec.as_nested_settings && !setting->value_as_nested_settings) {
char *label = NULL;
if (!desc->spec.key) {
/* generate a positional label for bare-value specs */
r = til_settings_label_setting(desc->container, setting, &label);
if (r < 0)
return r;
}
setting->value_as_nested_settings = til_settings_new(NULL, desc->container, desc->spec.key ? : label, til_setting_get_raw_value(setting));
free(label);
/* FIXME: til_settings_new() seems like it should return an errno, since it can encounter parse errors too? */
if (!setting->value_as_nested_settings)
return setup_ret_failed_desc_path(desc, -ENOMEM, res_failed_desc_path);
}
setting->desc = desc;
continue;
}
if (!defaults)
puts("");
if (desc->spec.values) {
unsigned i, preferred = 0;
int width = 0;
for (i = 0; desc->spec.values[i]; i++) {
int len;
len = strlen(desc->spec.values[i]);
if (len > width)
width = len;
}
/* multiple choice */
if (!defaults) {
til_setting_desc_fprint_path(desc, stdout);
printf(":\n %s:\n", desc->spec.name);
}
for (i = 0; desc->spec.values[i]; i++) {
if (!defaults)
printf(" %2u: %*s%s%s\n", i, width, desc->spec.values[i],
desc->spec.annotations ? ": " : "",
desc->spec.annotations ? desc->spec.annotations[i] : "");
if (!strcasecmp(desc->spec.preferred, desc->spec.values[i]))
preferred = i;
}
if (!defaults)
printf(" Enter a value 0-%u [%u (%s)]: ",
i - 1, preferred, desc->spec.preferred);
} else {
/* arbitrarily typed input */
if (!defaults) {
til_setting_desc_fprint_path(desc, stdout);
printf(":\n %s [%s]: ", desc->spec.name, desc->spec.preferred);
}
}
if (!defaults) {
fflush(stdout);
if (feof(stdin))
return -EIO;
(void) fgets(buf, sizeof(buf), stdin);
}
if (*buf == '\n') {
/* accept preferred */
til_settings_add_value(desc->container, desc->spec.key, desc->spec.preferred);
} else {
buf[strlen(buf) - 1] = '\0';
if (desc->spec.values && buf[0] != ':') {
unsigned i, j, found;
/* multiple choice, map numeric input to values entry */
if (sscanf(buf, "%u", &j) < 1) {
printf("Invalid input: \"%s\"\n", buf);
goto _next;
}
for (found = i = 0; desc->spec.values[i]; i++) {
if (i == j) {
til_settings_add_value(desc->container, desc->spec.key, desc->spec.values[i]);
found = 1;
break;
}
}
if (!found) {
printf("Invalid option: %u outside of range [0-%u]\n",
j, i - 1);
goto _next;
}
} else {
/* use typed input as setting, TODO: apply regex */
til_settings_add_value(desc->container, desc->spec.key, buf);
}
}
_next:
til_setting_desc_free(desc);
}
if (r < 0) {
if (r == -EINVAL) {
assert(setting);
return setup_ret_failed_desc_path(setting->desc, r, res_failed_desc_path);
}
return r;
}
return r < 0 ? r : additions;
}
|
