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
|
// file : build2/config/utility.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <build2/config/utility.hxx>
#include <build2/context.hxx>
#include <build2/config/module.hxx>
using namespace std;
namespace build2
{
namespace config
{
pair<lookup, bool>
omitted (scope& r, const variable& var)
{
// This is a stripped-down version of the required() twisted
// implementation.
pair<lookup, size_t> org (r.find_original (var));
bool n (false); // New flag.
lookup l (org.first);
// Treat an inherited value that was set to default as new.
//
if (l.defined () && l->extra)
n = true;
if (var.override != nullptr)
{
pair<lookup, size_t> ovr (r.find_override (var, move (org)));
if (l != ovr.first) // Overriden?
{
// Override is always treated as new.
//
n = true;
l = move (ovr.first);
}
}
if (l.defined () && current_mif->id == configure_id)
save_variable (r, var);
return pair<lookup, bool> (l, n);
}
lookup
optional (scope& r, const variable& var)
{
if (current_mif->id == configure_id)
save_variable (r, var);
auto l (r[var]);
return l.defined ()
? l
: lookup (r.assign (var), r); // NULL.
}
bool
specified (scope& r, const string& n)
{
// Search all outer scopes for any value in this namespace.
//
// What about "pure" overrides, i.e., those without any original values?
// Well, they will also be found since their names have the original
// variable as a prefix. But do they apply? Yes, since we haven't found
// any original values, they will be "visible"; see find_override() for
// details.
//
const variable& vns (var_pool.rw (r).insert ("config." + n));
for (scope* s (&r); s != nullptr; s = s->parent_scope ())
{
for (auto p (s->vars.find_namespace (vns));
p.first != p.second;
++p.first)
{
const variable& var (p.first->first);
// Ignore config.*.configured.
//
if (var.name.size () < 11 ||
var.name.compare (var.name.size () - 11, 11, ".configured") != 0)
return true;
}
}
return false;
}
bool
unconfigured (scope& rs, const string& n)
{
// Pattern-typed in boot() as bool.
//
const variable& var (
var_pool.rw (rs).insert ("config." + n + ".configured"));
if (current_mif->id == configure_id)
save_variable (rs, var);
auto l (rs[var]); // Include inherited values.
return l && !cast<bool> (l);
}
bool
unconfigured (scope& rs, const string& n, bool v)
{
// Pattern-typed in boot() as bool.
//
const variable& var (
var_pool.rw (rs).insert ("config." + n + ".configured"));
if (current_mif->id == configure_id)
save_variable (rs, var);
value& x (rs.assign (var));
if (x.null || cast<bool> (x) != !v)
{
x = !v;
return true;
}
else
return false;
}
void
save_variable (scope& r, const variable& var, uint64_t flags)
{
if (current_mif->id != configure_id)
return;
// The project might not be using the config module. But then how
// could we be configuring it? Good question.
//
if (module* m = r.modules.lookup<module> (module::name))
m->save_variable (var, flags);
}
void
save_module (scope& r, const char* name, int prio)
{
if (current_mif->id != configure_id)
return;
if (module* m = r.modules.lookup<module> (module::name))
m->save_module (name, prio);
}
}
}
|
