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
|
// file : libbuild2/utility.txx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
namespace build2
{
template <typename I, typename F>
void
append_option_values (cstrings& args, const char* o, I b, I e, F&& get)
{
if (b != e)
{
args.reserve (args.size () + (e - b));
for (; b != e; ++b)
{
args.push_back (o);
args.push_back (get (*b));
}
}
}
template <typename I, typename F>
void
append_option_values (sha256& cs, const char* o, I b, I e, F&& get)
{
for (; b != e; ++b)
{
cs.append (o);
cs.append (get (*b));
}
}
template <typename K>
basic_path<char, K>
relative (const basic_path<char, K>& p)
{
using path = basic_path<char, K>;
const dir_path& b (*relative_base);
if (p.simple () || b.empty ())
return p;
if (p.sub (b))
return p.leaf (b);
if (p.root_directory () == b.root_directory ())
{
path r (p.relative (b));
if (r.string ().size () < p.string ().size ())
return r;
}
return p;
}
[[noreturn]] LIBBUILD2_SYMEXPORT void
run_io_error (const char*[], const io_error&);
template <typename T, typename F>
T
run (uint16_t verbosity,
const process_env& pe,
const char* args[],
F&& f,
bool err,
bool ignore_exit,
sha256* checksum)
{
process pr (run_start (verbosity,
pe,
args,
0 /* stdin */,
-1 /* stdout */,
err));
T r;
string l; // Last line of output.
try
{
ifdstream is (move (pr.in_ofd), butl::fdstream_mode::skip);
// Make sure we keep the last line.
//
for (bool last (is.peek () == ifdstream::traits_type::eof ());
!last && getline (is, l); )
{
last = (is.peek () == ifdstream::traits_type::eof ());
trim (l);
if (checksum != nullptr)
checksum->append (l);
if (r.empty ())
{
r = f (l, last);
if (!r.empty () && checksum == nullptr)
break;
}
}
is.close ();
}
catch (const io_error& e)
{
if (run_wait (args, pr))
run_io_error (args, e);
// If the child process has failed then assume the io error was
// caused by that and let run_finish() deal with it.
}
if (!(run_finish_impl (args, pr, err, l) || ignore_exit))
r = T ();
return r;
}
}
|
