blob: 875c07da6399665dda41b112a3572c2f53c241f2 (
plain) (
blame)
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
|
// These are useful methods inside the nix library that ought to be exported.
// Since they are not, copy/paste them here.
// TODO: Delete these and use the ones in the library as they become available.
#include <nix/config.h> // for nix/globals.hh's reference to SYSTEM
#include "libnix-copy-paste.hh"
#include <boost/format/alt_sstream.hpp> // for basic_altstringbuf...
#include <boost/format/alt_sstream_impl.hpp> // for basic_altstringbuf...
#include <boost/format/format_class.hpp> // for basic_format
#include <boost/format/format_fwd.hpp> // for format
#include <boost/format/format_implementation.hpp> // for basic_format::basi...
#include <boost/optional/optional.hpp> // for get_pointer
#include <iostream> // for operator<<, basic_...
#include <nix/types.hh> // for Strings, Error
#include <string> // for string, basic_string
using boost::format;
using nix::Error;
using nix::Strings;
using std::string;
// From nix/src/libexpr/attr-path.cc
Strings parseAttrPath(const string & s)
{
Strings res;
string cur;
string::const_iterator i = s.begin();
while (i != s.end()) {
if (*i == '.') {
res.push_back(cur);
cur.clear();
} else if (*i == '"') {
++i;
while (1) {
if (i == s.end())
throw Error(format("missing closing quote in selection path '%1%'") % s);
if (*i == '"')
break;
cur.push_back(*i++);
}
} else
cur.push_back(*i);
++i;
}
if (!cur.empty())
res.push_back(cur);
return res;
}
// From nix/src/nix/repl.cc
bool isVarName(const string & s)
{
if (s.size() == 0)
return false;
char c = s[0];
if ((c >= '0' && c <= '9') || c == '-' || c == '\'')
return false;
for (auto & i : s)
if (!((i >= 'a' && i <= 'z') || (i >= 'A' && i <= 'Z') || (i >= '0' && i <= '9') || i == '_' || i == '-' ||
i == '\''))
return false;
return true;
}
// From nix/src/nix/repl.cc
std::ostream & printStringValue(std::ostream & str, const char * string)
{
str << "\"";
for (const char * i = string; *i; i++)
if (*i == '\"' || *i == '\\')
str << "\\" << *i;
else if (*i == '\n')
str << "\\n";
else if (*i == '\r')
str << "\\r";
else if (*i == '\t')
str << "\\t";
else
str << *i;
str << "\"";
return str;
}
|