about summary refs log tree commit diff
path: root/src/nix-worker/main.cc
blob: 8ac69561f0bf73cb1294c0a8c7d673ba1cd2f05a (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
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
#include "shared.hh"
#include "local-store.hh"
#include "util.hh"
#include "serialise.hh"
#include "worker-protocol.hh"
#include "archive.hh"

using namespace nix;


Path readStorePath(Source & from)
{
    Path path = readString(from);
    assertStorePath(path);
    return path;
}


PathSet readStorePaths(Source & from)
{
    PathSet paths = readStringSet(from);
    for (PathSet::iterator i = paths.begin(); i != paths.end(); ++i)
        assertStorePath(*i);
    return paths;
}


void processConnection(Source & from, Sink & to)
{
    store = boost::shared_ptr<StoreAPI>(new LocalStore(true));

    unsigned int magic = readInt(from);
    if (magic != WORKER_MAGIC_1) throw Error("protocol mismatch");

    writeInt(WORKER_MAGIC_2, to);

    debug("greeting exchanged");

    bool quit = false;
    
    do {
        
        WorkerOp op = (WorkerOp) readInt(from);

        switch (op) {

        case wopQuit:
            /* Close the database. */
            store.reset((StoreAPI *) 0);
            writeInt(1, to);
            quit = true;
            break;

        case wopIsValidPath: {
            Path path = readStorePath(from);
            writeInt(store->isValidPath(path), to);
            break;
        }

        case wopHasSubstitutes: {
            Path path = readStorePath(from);
            writeInt(store->hasSubstitutes(path), to);
            break;
        }

        case wopQueryReferences:
        case wopQueryReferrers: {
            Path path = readStorePath(from);
            PathSet paths;
            if (op == wopQueryReferences)
                store->queryReferences(path, paths);
            else
                store->queryReferrers(path, paths);
            writeStringSet(paths, to);
            break;
        }

        case wopAddToStore: {
            /* !!! uberquick hack */
            string baseName = readString(from);
            Path tmp = createTempDir();
            Path tmp2 = tmp + "/" + baseName;
            restorePath(tmp2, from);
            writeString(store->addToStore(tmp2), to);
            deletePath(tmp);
            break;
        }

        case wopAddTextToStore: {
            string suffix = readString(from);
            string s = readString(from);
            PathSet refs = readStorePaths(from);
            writeString(store->addTextToStore(suffix, s, refs), to);
            break;
        }

        case wopBuildDerivations: {
            PathSet drvs = readStorePaths(from);
            store->buildDerivations(drvs);
            writeInt(1, to);
            break;
        }

        case wopEnsurePath: {
            Path path = readStorePath(from);
            store->ensurePath(path);
            writeInt(1, to);
            break;
        }

        default:
            throw Error(format("invalid operation %1%") % op);
        }
        
    } while (!quit);
}


void run(Strings args)
{
    bool slave = false;
    bool daemon = false;
    
    for (Strings::iterator i = args.begin(); i != args.end(); ) {
        string arg = *i++;
        if (arg == "--slave") slave = true;
    }

    if (slave) {
        FdSource source(STDIN_FILENO);
        FdSink sink(STDOUT_FILENO);
        processConnection(source, sink);
    }

    else if (daemon)
        throw Error("daemon mode not implemented");

    else
        throw Error("must be run in either --slave or --daemon mode");
        
}


void printHelp()
{
}


string programId = "nix-store";