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|
package pkgset
import (
"context"
"strings"
"golang.org/x/tools/go/packages"
)
var envvars = map[string]struct{}{
"GOOS": {},
"GOARCH": {},
"GOENV": {},
"GOFLAGS": {},
"GOROOT": {},
"CGO_ENABLED": {},
}
var packageAliases = map[string]string{
"C": "runtime/cgo",
}
func replaceAliases(patterns ...string) []string {
xs := append([]string{}, patterns...)
for i, x := range xs {
if alias, ok := packageAliases[x]; ok {
xs[i] = alias
}
}
return xs
}
type Context struct {
Context context.Context
Tags Strings
Env Strings
}
func (ctx Context) Clone() *Context {
return &Context{
Context: ctx.Context,
Tags: ctx.Tags.Clone(),
Env: ctx.Env.Clone(),
}
}
func (ctx Context) Load(patterns ...string) ([]*packages.Package, error) {
return packages.Load(ctx.Config(), replaceAliases(patterns...)...)
}
func (ctx Context) LoadWithTests(patterns ...string) ([]*packages.Package, error) {
config := ctx.Config()
config.Tests = true
return packages.Load(config, replaceAliases(patterns...)...)
}
func (ctx Context) LoadWithoutTests(patterns ...string) ([]*packages.Package, error) {
config := ctx.Config()
config.Tests = false
return packages.Load(config, replaceAliases(patterns...)...)
}
func (ctx *Context) Set(key, value string) {
if _, ok := envvars[strings.ToUpper(key)]; ok {
ctx.Env.Set(strings.ToUpper(key), value)
return
}
ctx.Tags.Set(key, value)
}
func (ctx Context) Config() *packages.Config {
config := &packages.Config{
Context: ctx.Context,
Mode: packages.NeedName | packages.NeedFiles | packages.NeedCompiledGoFiles | packages.NeedImports | packages.NeedModule,
Env: ctx.Env,
Tests: ctx.Tags.ValueOf("test") == "1",
}
tags := []string{}
for _, tag := range ctx.Tags {
key, value := KeyValue(tag)
if strings.EqualFold("test", key) {
continue
}
if value == "1" {
tags = append(tags, key)
}
}
if len(tags) > 0 {
config.BuildFlags = append(config.BuildFlags, "-tags="+strings.Join(tags, ","))
}
return config
}
type Strings []string
func (strs *Strings) Set(key, value string) {
i := strs.IndexOf(key)
if i < 0 {
*strs = append(*strs, key+"="+value)
return
}
(*strs)[i] = key + "=" + value
}
func (strs Strings) ValueOf(key string) string {
i := strs.IndexOf(key)
if i < 0 {
return ""
}
_, value := KeyValue(strs[i])
return value
}
func (strs Strings) IndexOf(key string) int {
prefix := strings.ToLower(key + "=")
for i, x := range strs {
x = strings.ToLower(x)
if strings.HasPrefix(x, prefix) {
return i
}
}
return -1
}
func (strs Strings) Clone() Strings {
return append(Strings{}, strs...)
}
// KeyValue parses s into a key and value.
func KeyValue(s string) (string, string) {
p := strings.LastIndexByte(s, '=')
if p < 0 {
return s, ""
}
return s[:p], s[p+1:]
}
|
