packer-cn/cmd/generate-fixer-deprecations/main.go

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package main
import (
"bytes"
"flag"
"fmt"
"go/format"
"os"
"path/filepath"
"strings"
"text/template"
"github.com/hashicorp/packer/fix"
)
var deprecatedOptsTemplate = template.Must(template.New("deprecatedOptsTemplate").Funcs(template.FuncMap{"StringsJoin": strings.Join}).Parse(`//<!-- Code generated by generate-fixer-deprecations; DO NOT EDIT MANUALLY -->
package config
var DeprecatedOptions = map[string][]string{
{{- range $key, $value := .DeprecatedOpts}}
"{{$key}}": []string{"{{ StringsJoin . "\", \"" }}"},
{{- end}}
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}
`))
type executeOpts struct {
DeprecatedOpts map[string][]string
}
func main() {
// Figure out location in directory structure
args := flag.Args()
if len(args) == 0 {
// Default: process the file
args = []string{os.Getenv("GOFILE")}
}
fname := args[0]
absFilePath, err := filepath.Abs(fname)
if err != nil {
panic(err)
}
paths := strings.Split(absFilePath, "cmd"+string(os.PathSeparator)+
"generate-fixer-deprecations"+string(os.PathSeparator)+"main.go")
packerDir := paths[0]
// Load all deprecated options from all active fixers
allDeprecatedOpts := map[string][]string{}
for _, name := range fix.FixerOrder {
fixer, ok := fix.Fixers[name]
if !ok {
panic("fixer not found: " + name)
}
deprecated := fixer.DeprecatedOptions()
for k, v := range deprecated {
if allDeprecatedOpts[k] == nil {
allDeprecatedOpts[k] = v
} else {
allDeprecatedOpts[k] = append(allDeprecatedOpts[k], v...)
}
}
}
deprecated_path := filepath.Join(packerDir, "packer-plugin-sdk", "template",
"config", "deprecated_options.go")
buf := bytes.Buffer{}
// execute template into buffer
deprecated := &executeOpts{DeprecatedOpts: allDeprecatedOpts}
err = deprecatedOptsTemplate.Execute(&buf, deprecated)
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if err != nil {
panic(err)
}
// we've written unformatted go code to the file. now we have to format it.
out, err := format.Source(buf.Bytes())
if err != nil {
panic(err)
}
outputFile, err := os.Create(deprecated_path)
if err != nil {
panic(err)
}
_, err = outputFile.Write(out)
defer outputFile.Close()
if err != nil {
fmt.Printf("%v", err)
os.Exit(1)
}
}