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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
#include <map>
#include <iostream>
#include "globals.hh"
#include "build.hh"
#include "gc.hh"
#include "shared.hh"
#include "eval.hh"
#include "parser.hh"
#include "nixexpr-ast.hh"
#include "get-drvs.hh"
#include "attr-path.hh"
#include "xml-writer.hh"
#include "help.txt.hh"
void printHelp()
{
cout << string((char *) helpText, sizeof helpText);
}
static Expr parseStdin(EvalState & state)
{
startNest(nest, lvlTalkative, format("parsing standard input"));
string s, s2;
while (getline(cin, s2)) s += s2 + "\n";
return parseExprFromString(state, s, absPath("."));
}
static Path gcRoot;
static int rootNr = 0;
static bool indirectRoot = false;
static XMLAttrs singletonAttrs(const string & name, const string & value)
{
XMLAttrs attrs;
attrs[name] = value;
return attrs;
}
static void printTermAsXML(EvalState & state, Expr e, XMLWriter & doc)
{
XMLAttrs attrs;
ATerm s;
int i;
ATermList as;
if (matchStr(e, s))
doc.writeEmptyElement("string", singletonAttrs("value", aterm2String(s)));
else if (matchPath(e, s))
doc.writeEmptyElement("path", singletonAttrs("value", aterm2String(s)));
else if (matchUri(e, s))
doc.writeEmptyElement("uri", singletonAttrs("value", aterm2String(s)));
else if (matchNull(e))
doc.writeEmptyElement("null");
else if (matchInt(e, i))
doc.writeEmptyElement("int",singletonAttrs("value", (format("%1%") % i).str()));
else if (matchAttrs(e, as)) {
XMLOpenElement _(doc, "attrs");
ATermMap attrs(128);
queryAllAttrs(e, attrs);
for (ATermMap::const_iterator i = attrs.begin(); i != attrs.end(); ++i) {
XMLOpenElement _(doc, "attr", singletonAttrs("name", aterm2String(i->key)));
printTermAsXML(state, i->value, doc);
}
}
else
doc.writeEmptyElement("unknown");
}
static void printResult(EvalState & state, Expr e,
bool evalOnly, bool printArgs, bool xmlOutput,
const ATermMap & autoArgs)
{
if (evalOnly)
if (xmlOutput) {
XMLWriter doc(true, cout);
XMLOpenElement root(doc, "expr");
printTermAsXML(state, e, doc);
} else
cout << format("%1%\n") % e;
else if (printArgs) {
XMLWriter doc(true, cout);
XMLOpenElement root(doc, "args");
ATermList formals;
ATerm body, pos;
if (matchFunction(e, formals, body, pos)) {
for (ATermIterator i(formals); i; ++i) {
Expr name; ValidValues valids; ATerm dummy;
if (!matchFormal(*i, name, valids, dummy)) abort();
XMLAttrs attrs;
attrs["name"] = aterm2String(name);
XMLOpenElement elem(doc, "arg", attrs);
ATermList valids2;
if (matchValidValues(valids, valids2)) {
for (ATermIterator j(valids2); j; ++j) {
Expr e = evalExpr(state, *j);
XMLAttrs attrs;
attrs["value"] = showValue(e);
XMLOpenElement elem(doc, "value", attrs);
}
}
}
} else
printMsg(lvlError, "warning: expression does not evaluate to a function");
}
else {
DrvInfos drvs;
getDerivations(state, e, "", autoArgs, drvs);
for (DrvInfos::iterator i = drvs.begin(); i != drvs.end(); ++i) {
Path drvPath = i->queryDrvPath(state);
if (gcRoot == "")
printGCWarning();
else
drvPath = addPermRoot(drvPath,
makeRootName(gcRoot, rootNr),
indirectRoot);
cout << format("%1%\n") % drvPath;
}
}
}
void run(Strings args)
{
EvalState state;
Strings files;
bool readStdin = false;
bool evalOnly = false;
bool parseOnly = false;
bool printArgs = false;
bool xmlOutput = false;
string attrPath;
ATermMap autoArgs(128);
for (Strings::iterator i = args.begin();
i != args.end(); )
{
string arg = *i++;
if (arg == "-")
readStdin = true;
else if (arg == "--eval-only") {
readOnlyMode = true;
evalOnly = true;
}
else if (arg == "--parse-only") {
readOnlyMode = true;
parseOnly = evalOnly = true;
}
else if (arg == "--print-args") {
readOnlyMode = true;
printArgs = true;
}
else if (arg == "--attr" || arg == "-A") {
if (i == args.end())
throw UsageError("`--attr' requires an argument");
attrPath = *i++;
}
else if (arg == "--arg") {
if (i == args.end())
throw UsageError("`--arg' requires two arguments");
string name = *i++;
if (i == args.end())
throw UsageError("`--arg' requires two arguments");
Expr value = parseExprFromString(state, *i++, absPath("."));
autoArgs.set(toATerm(name), value);
}
else if (arg == "--add-root") {
if (i == args.end())
throw UsageError("`--add-root' requires an argument");
gcRoot = absPath(*i++);
}
else if (arg == "--indirect")
indirectRoot = true;
else if (arg == "--xml")
xmlOutput = true;
else if (arg[0] == '-')
throw UsageError(format("unknown flag `%1%'") % arg);
else
files.push_back(arg);
}
openDB();
if (readStdin) {
Expr e = findAlongAttrPath(state, attrPath, parseStdin(state));
if (!parseOnly) e = evalExpr(state, e);
printResult(state, e, evalOnly, printArgs, xmlOutput, autoArgs);
}
for (Strings::iterator i = files.begin();
i != files.end(); i++)
{
Path path = absPath(*i);
Expr e = findAlongAttrPath(state, attrPath,
parseExprFromFile(state, path));
if (!parseOnly) e = evalExpr(state, e);
printResult(state, e, evalOnly, printArgs, xmlOutput, autoArgs);
}
printEvalStats(state);
}
string programId = "nix-instantiate";
|
