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
|
package bp2build
import (
"android/soong/android"
"android/soong/bazel"
"fmt"
"reflect"
)
// Configurability support for bp2build.
type selects map[string]reflect.Value
func getStringListValues(list bazel.StringListAttribute) (reflect.Value, selects, selects) {
value := reflect.ValueOf(list.Value)
if !list.HasConfigurableValues() {
return value, nil, nil
}
archSelects := map[string]reflect.Value{}
for arch, selectKey := range bazel.PlatformArchMap {
archSelects[selectKey] = reflect.ValueOf(list.GetValueForArch(arch))
}
osSelects := map[string]reflect.Value{}
for os, selectKey := range bazel.PlatformOsMap {
osSelects[selectKey] = reflect.ValueOf(list.GetValueForOS(os))
}
return value, archSelects, osSelects
}
func getLabelValue(label bazel.LabelAttribute) (reflect.Value, selects, selects) {
var value reflect.Value
var archSelects selects
if label.HasConfigurableValues() {
archSelects = map[string]reflect.Value{}
for arch, selectKey := range bazel.PlatformArchMap {
archSelects[selectKey] = reflect.ValueOf(label.GetValueForArch(arch))
}
} else {
value = reflect.ValueOf(label.Value)
}
return value, archSelects, nil
}
func getLabelListValues(list bazel.LabelListAttribute) (reflect.Value, selects, selects) {
value := reflect.ValueOf(list.Value.Includes)
if !list.HasConfigurableValues() {
return value, nil, nil
}
archSelects := map[string]reflect.Value{}
for arch, selectKey := range bazel.PlatformArchMap {
archSelects[selectKey] = reflect.ValueOf(list.GetValueForArch(arch).Includes)
}
osSelects := map[string]reflect.Value{}
for os, selectKey := range bazel.PlatformOsMap {
osSelects[selectKey] = reflect.ValueOf(list.GetValueForOS(os).Includes)
}
return value, archSelects, osSelects
}
// prettyPrintAttribute converts an Attribute to its Bazel syntax. May contain
// select statements.
func prettyPrintAttribute(v bazel.Attribute, indent int) (string, error) {
var value reflect.Value
var archSelects, osSelects selects
var defaultSelectValue string
switch list := v.(type) {
case bazel.StringListAttribute:
value, archSelects, osSelects = getStringListValues(list)
defaultSelectValue = "[]"
case bazel.LabelListAttribute:
value, archSelects, osSelects = getLabelListValues(list)
defaultSelectValue = "[]"
case bazel.LabelAttribute:
value, archSelects, osSelects = getLabelValue(list)
defaultSelectValue = "None"
default:
return "", fmt.Errorf("Not a supported Bazel attribute type: %s", v)
}
ret := ""
if value.Kind() != reflect.Invalid {
s, err := prettyPrint(value, indent)
if err != nil {
return ret, err
}
ret += s
}
// Convenience function to append selects components to an attribute value.
appendSelects := func(selectsData selects, defaultValue, s string) (string, error) {
selectMap, err := prettyPrintSelectMap(selectsData, defaultValue, indent)
if err != nil {
return "", err
}
if s != "" && selectMap != "" {
s += " + "
}
s += selectMap
return s, nil
}
ret, err := appendSelects(archSelects, defaultSelectValue, ret)
if err != nil {
return "", err
}
ret, err = appendSelects(osSelects, defaultSelectValue, ret)
return ret, err
}
// prettyPrintSelectMap converts a map of select keys to reflected Values as a generic way
// to construct a select map for any kind of attribute type.
func prettyPrintSelectMap(selectMap map[string]reflect.Value, defaultValue string, indent int) (string, error) {
if selectMap == nil {
return "", nil
}
// addConditionsDefault := false
conditionsDefaultKey := bazel.PlatformArchMap[bazel.CONDITIONS_DEFAULT]
var selects string
for _, selectKey := range android.SortedStringKeys(selectMap) {
if selectKey == conditionsDefaultKey {
// Handle default condition later.
continue
}
value := selectMap[selectKey]
if isZero(value) {
// Ignore zero values to not generate empty lists.
continue
}
s, err := prettyPrintSelectEntry(value, selectKey, indent)
if err != nil {
return "", err
}
// s could still be an empty string, e.g. unset slices of structs with
// length of 0.
if s != "" {
selects += s + ",\n"
}
}
if len(selects) == 0 {
// No conditions (or all values are empty lists), so no need for a map.
return "", nil
}
// Create the map.
ret := "select({\n"
ret += selects
// Handle the default condition
s, err := prettyPrintSelectEntry(selectMap[conditionsDefaultKey], conditionsDefaultKey, indent)
if err != nil {
return "", err
}
if s == "" {
// Print an explicit empty list (the default value) even if the value is
// empty, to avoid errors about not finding a configuration that matches.
ret += fmt.Sprintf("%s\"%s\": %s,\n", makeIndent(indent+1), "//conditions:default", defaultValue)
} else {
// Print the custom default value.
ret += s
ret += ",\n"
}
ret += makeIndent(indent)
ret += "})"
return ret, nil
}
// prettyPrintSelectEntry converts a reflect.Value into an entry in a select map
// with a provided key.
func prettyPrintSelectEntry(value reflect.Value, key string, indent int) (string, error) {
s := makeIndent(indent + 1)
v, err := prettyPrint(value, indent+1)
if err != nil {
return "", err
}
if v == "" {
return "", nil
}
s += fmt.Sprintf("\"%s\": %s", key, v)
return s, nil
}
|
