fdeb724f74
Now that we have multi-stage bootstrapping, we can make the primary
builder build more dynamic. Add the concept of plugins that will be
linked and loaded into bootstrap_go_binary or bootstrap_go_package
modules. It's expected that the plugin's init() functions will do
whatever registration is necessary.
Example Blueprint definition:
bootstrap_go_binary {
name: "builder",
...
}
bootstrap_go_package {
name: "plugin1",
pluginFor: ["builder"],
}
A package may specify more than one plugin if it will be inserted into
more than one go module.
Change-Id: I109835f444196b66fc4018c3fa36ba0875823184
67 lines
1.3 KiB
Go
67 lines
1.3 KiB
Go
// Copyright 2015 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"bytes"
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"flag"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"text/template"
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)
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var (
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output = flag.String("o", "", "output filename")
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pkg = flag.String("p", "main", "package name")
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)
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func main() {
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flag.Parse()
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if flag.NArg() == 0 {
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fmt.Fprintln(os.Stderr, "error: must pass at least one input")
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os.Exit(1)
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}
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buf := &bytes.Buffer{}
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err := pluginTmpl.Execute(buf, struct {
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Package string
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Plugins []string
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}{
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filepath.Base(*pkg),
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flag.Args(),
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})
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if err != nil {
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panic(err)
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}
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err = ioutil.WriteFile(*output, buf.Bytes(), 0666)
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if err != nil {
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panic(err)
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}
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}
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var pluginTmpl = template.Must(template.New("pluginloader").Parse(`
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package {{.Package}}
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import (
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{{range .Plugins}}
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_ "{{.}}"
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{{end}}
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)
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`))
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