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
|
#include "globals.hh"
#include "gc.hh"
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#if 0
void followLivePaths(Path nePath, PathSet & live)
{
/* Just to be sure, canonicalise the path. It is important to do
this here and in findDeadPath() to ensure that a live path is
not mistaken for a dead path due to some non-canonical
representation. */
nePath = canonPath(nePath);
if (live.find(nePath) != live.end()) return;
live.insert(nePath);
startNest(nest, lvlDebug, format("following `%1%'") % nePath);
assertStorePath(nePath);
if (isValidPath(nePath)) {
/* !!! should make sure that no substitutes are used */
StoreExpr ne = storeExprFromPath(nePath);
/* !!! painfully similar to requisitesWorker() */
if (ne.type == StoreExpr::neClosure)
for (ClosureElems::iterator i = ne.closure.elems.begin();
i != ne.closure.elems.end(); ++i)
{
Path p = canonPath(i->first);
if (live.find(p) == live.end()) {
debug(format("found live `%1%'") % p);
assertStorePath(p);
live.insert(p);
}
}
else if (ne.type == StoreExpr::neDerivation)
for (PathSet::iterator i = ne.derivation.inputs.begin();
i != ne.derivation.inputs.end(); ++i)
followLivePaths(*i, live);
else abort();
}
Path nfPath;
if (querySuccessor(nePath, nfPath))
followLivePaths(nfPath, live);
}
PathSet findLivePaths(const Paths & roots)
{
PathSet live;
startNest(nest, lvlDebug, "finding live paths");
for (Paths::const_iterator i = roots.begin(); i != roots.end(); ++i)
followLivePaths(*i, live);
return live;
}
PathSet findDeadPaths(const PathSet & live, time_t minAge)
{
PathSet dead;
startNest(nest, lvlDebug, "finding dead paths");
time_t now = time(0);
Strings storeNames = readDirectory(nixStore);
for (Strings::iterator i = storeNames.begin(); i != storeNames.end(); ++i) {
Path p = canonPath(nixStore + "/" + *i);
if (minAge > 0) {
struct stat st;
if (lstat(p.c_str(), &st) != 0)
throw SysError(format("obtaining information about `%1%'") % p);
if (st.st_atime + minAge >= now) continue;
}
if (live.find(p) == live.end()) {
debug(format("dead path `%1%'") % p);
dead.insert(p);
} else
debug(format("live path `%1%'") % p);
}
return dead;
}
#endif
|
