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
|
#include "config.hh"
#include "args.hh"
namespace nix {
void Config::set(const std::string & name, const std::string & value)
{
auto i = _settings.find(name);
if (i == _settings.end())
throw UsageError("unknown setting '%s'", name);
i->second.setting->set(value);
}
void Config::add(AbstractSetting * setting)
{
_settings.emplace(setting->name, Config::SettingData{false, setting});
for (auto & alias : setting->aliases)
_settings.emplace(alias, Config::SettingData{true, setting});
bool set = false;
auto i = initials.find(setting->name);
if (i != initials.end()) {
setting->set(i->second);
initials.erase(i);
set = true;
}
for (auto & alias : setting->aliases) {
auto i = initials.find(alias);
if (i != initials.end()) {
if (set)
warn("setting '%s' is set, but it's an alias of '%s' which is also set",
alias, setting->name);
else {
setting->set(i->second);
initials.erase(i);
set = true;
}
}
}
}
void Config::warnUnused()
{
for (auto & i : initials)
warn("unknown setting '%s'", i.first);
}
std::string Config::dump()
{
std::string res;
for (auto & opt : _settings)
if (!opt.second.isAlias)
res += opt.first + " = " + opt.second.setting->to_string() + "\n";
return res;
}
AbstractSetting::AbstractSetting(
const std::string & name,
const std::string & description,
const std::set<std::string> & aliases)
: name(name), description(description), aliases(aliases)
{
}
template<> void Setting<std::string>::set(const std::string & str)
{
value = str;
}
template<> std::string Setting<std::string>::to_string()
{
return value;
}
template<typename T>
void Setting<T>::set(const std::string & str)
{
static_assert(std::is_integral<T>::value, "Integer required.");
try {
auto i = std::stoll(str);
if (i < std::numeric_limits<T>::min() ||
i > std::numeric_limits<T>::max())
throw UsageError("setting '%s' has out-of-range value %d", name, i);
value = i;
} catch (std::logic_error&) {
throw UsageError("setting '%s' has invalid value '%s'", name, str);
}
}
template<typename T>
std::string Setting<T>::to_string()
{
static_assert(std::is_integral<T>::value, "Integer required.");
return std::to_string(value);
}
template<> void Setting<bool>::set(const std::string & str)
{
if (str == "true" || str == "yes" || str == "1")
value = true;
else if (str == "false" || str == "no" || str == "0")
value = false;
else
throw UsageError("Boolean setting '%s' has invalid value '%s'", name, str);
}
template<> std::string Setting<bool>::to_string()
{
return value ? "true" : "false";
}
template class Setting<int>;
template class Setting<unsigned int>;
template class Setting<long>;
template class Setting<size_t>;
void PathSetting::set(const std::string & str)
{
if (str == "") {
if (allowEmpty)
value = "";
else
throw UsageError("setting '%s' cannot be empty", name);
} else
value = canonPath(str);
}
}
|
