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
|
// Copyright 2017 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.devtools.build.lib.skyframe;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Interner;
import com.google.devtools.build.lib.concurrent.BlazeInterners;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec;
import com.google.devtools.build.skyframe.AbstractSkyKey;
import com.google.devtools.build.skyframe.SkyFunction;
import com.google.devtools.build.skyframe.SkyFunctionName;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.SkyValue;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;
import javax.annotation.Nullable;
/**
* Skyframe function that provides the effective value for a client environment variable. This will
* either be the value coming from the default client environment, or the value coming from the
* --action_env flag, if the variable's value is explicitly set.
*/
public final class ActionEnvironmentFunction implements SkyFunction {
@Nullable
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
@Nullable
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws InterruptedException {
Map<String, String> actionEnv = PrecomputedValue.ACTION_ENV.get(env);
String key = (String) skyKey.argument();
if (actionEnv.containsKey(key) && actionEnv.get(key) != null) {
return new ClientEnvironmentValue(actionEnv.get(key));
}
return env.getValue(ClientEnvironmentFunction.key(key));
}
/** @return the SkyKey to invoke this function for the environment variable {@code variable}. */
public static Key key(String variable) {
return Key.create(variable);
}
@AutoCodec.VisibleForSerialization
@AutoCodec
static class Key extends AbstractSkyKey<String> {
private static final Interner<Key> interner = BlazeInterners.newWeakInterner();
private Key(String arg) {
super(arg);
}
@AutoCodec.VisibleForSerialization
@AutoCodec.Instantiator
static Key create(String arg) {
return interner.intern(new Key(arg));
}
@Override
public SkyFunctionName functionName() {
return SkyFunctions.ACTION_ENVIRONMENT_VARIABLE;
}
}
/**
* Returns a map of environment variable key => values, getting them from Skyframe. Returns null
* if and only if some dependencies from Skyframe still need to be resolved.
*/
public static Map<String, String> getEnvironmentView(Environment env, Iterable<String> keys)
throws InterruptedException {
ImmutableList.Builder<SkyKey> skyframeKeysBuilder = ImmutableList.builder();
for (String key : keys) {
skyframeKeysBuilder.add(key(key));
}
ImmutableList<SkyKey> skyframeKeys = skyframeKeysBuilder.build();
Map<SkyKey, SkyValue> values = env.getValues(skyframeKeys);
if (env.valuesMissing()) {
return null;
}
// To return the initial order and support null values, we use a LinkedHashMap.
LinkedHashMap<String, String> result = new LinkedHashMap<>();
for (SkyKey key : skyframeKeys) {
ClientEnvironmentValue value = (ClientEnvironmentValue) values.get(key);
result.put(key.argument().toString(), value.getValue());
}
return Collections.unmodifiableMap(result);
}
}
|
