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main.go
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main.go
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package main
import (
"bytes"
"fmt"
"io/ioutil"
"log"
"os"
"path/filepath"
"strings"
"text/template"
"github.com/sacloud/usacloud/schema"
"github.com/sacloud/usacloud/tools"
)
var (
destination = "src/github.com/sacloud/usacloud/command/completion"
ctx = tools.NewGenerateContext()
)
// Usage is a replacement usage function for the flags package.
func Usage() {
fmt.Fprintf(os.Stderr, "Usage of %s:\n", os.Args[0])
fmt.Fprintf(os.Stderr, "\tgen-command-completion\n")
os.Exit(2)
}
func main() {
log.SetFlags(0)
log.SetPrefix("gen-command-funcs: ")
for k, r := range ctx.ResourceDef {
ctx.SetCurrentR(k)
err := generateResource(r)
if err != nil {
log.Fatalf("writing output: %s", err)
}
}
}
func generateResource(resource *schema.Resource) error {
normalArgCompletions := []schema.SortableCommand{}
normalFlagCompletions := []schema.SortableCommand{}
// build custom completions per command
for _, comm := range resource.SortedCommands() {
c := comm.Command
k := comm.CommandKey
ctx.C = k
// Write to file.
// like 'comp_switch_list_args.go'
baseName := ctx.CommandArgsCompletionFileName(c.UseCustomArgCompletion)
outputName := filepath.Join(ctx.Gopath(), destination, baseName)
if c.UseCustomArgCompletion {
// target file is exist?
_, err := os.Stat(outputName)
if err != nil {
// generate args completion
src, err := generateArgsComplete(comm)
if err != nil {
return err
}
err = ioutil.WriteFile(outputName, tools.Sformat([]byte(src)), 0644)
if err != nil {
return err
}
fmt.Printf("generated: %s\n", filepath.Join(destination, baseName))
}
} else {
normalArgCompletions = append(normalArgCompletions, comm)
}
// Write to file.
// like 'comp_switch_list_flags.go'
baseName = ctx.CommandFlagsCompletionFileName(c.UseCustomFlagsCompletion)
outputName = filepath.Join(ctx.Gopath(), destination, baseName)
if c.UseCustomFlagsCompletion {
// target file is exist?
_, err := os.Stat(outputName)
if err != nil {
// generate flags completion
src, err := generateFlagsComplete(comm)
if err != nil {
return err
}
err = ioutil.WriteFile(outputName, tools.Sformat([]byte(src)), 0644)
if err != nil {
return err
}
fmt.Printf("generated: %s\n", filepath.Join(destination, baseName))
}
} else {
normalFlagCompletions = append(normalFlagCompletions, comm)
}
}
// build completions per resource
// args
if len(normalArgCompletions) > 0 {
baseName := ctx.ResourceArgsCompletionFileName()
outputName := filepath.Join(ctx.Gopath(), destination, baseName)
// generate args completion
src, err := generateArgsComplete(normalArgCompletions...)
if err != nil {
return err
}
err = ioutil.WriteFile(outputName, tools.Sformat([]byte(src)), 0644)
if err != nil {
return err
}
fmt.Printf("generated: %s\n", filepath.Join(destination, baseName))
}
if len(normalFlagCompletions) > 0 {
// flags
baseName := ctx.ResourceFlagsCompletionFileName()
outputName := filepath.Join(ctx.Gopath(), destination, baseName)
// generate args completion
src, err := generateFlagsComplete(normalFlagCompletions...)
if err != nil {
return err
}
err = ioutil.WriteFile(outputName, tools.Sformat([]byte(src)), 0644)
if err != nil {
return err
}
fmt.Printf("generated: %s\n", filepath.Join(destination, baseName))
}
return nil
}
func generateArgsComplete(commands ...schema.SortableCommand) (string, error) {
b := bytes.NewBufferString("")
t := template.New("c")
template.Must(t.Parse(completeArgsTemplate))
paramCommands := []map[string]interface{}{}
useImport := false
for _, command := range commands {
c := command.Command
k := command.CommandKey
ctx.C = k
action, err := generateArgsCompleteAction(c)
if err != nil {
return "", err
}
paramCommands = append(paramCommands, map[string]interface{}{
"FuncName": ctx.CompleteArgsFuncName(),
"ParamName": ctx.InputModelTypeName(),
"Action": action,
})
if action != "" {
useImport = true
}
}
err := t.Execute(b, map[string]interface{}{
"NeedDonotEditComment": !commands[0].Command.UseCustomArgCompletion,
"UseImport": useImport,
"Commands": paramCommands,
})
return b.String(), err
}
func generateArgsCompleteAction(command *schema.Command) (string, error) {
var res string
var err error
if command.Type.IsRequiredIDType() {
res, err = generateIDCompletion(command)
} else {
res, err = "", nil
}
return res, err
}
func generateIDCompletion(command *schema.Command) (string, error) {
b := bytes.NewBufferString("")
t := template.New("c")
template.Must(t.Parse(completeIDTemplate))
err := t.Execute(b, map[string]interface{}{
"FinderFieldName": ctx.CommandResourceName(),
"ListResultField": ctx.FindResultFieldName(),
"IsNeedNameComp": !command.Type.IsNeedIDOnlyType(),
})
return b.String(), err
}
func generateFlagsComplete(commands ...schema.SortableCommand) (string, error) {
b := bytes.NewBufferString("")
t := template.New("c")
t.Funcs(template.FuncMap{
"join": strings.Join,
})
template.Must(t.Parse(completeFlagsTemplate))
paramCommands := []map[string]interface{}{}
useImport := false
for _, command := range commands {
c := command.Command
k := command.CommandKey
ctx.C = k
flags := []map[string]interface{}{}
for _, param := range c.BuildedParams() {
p := param.Param
ctx.P = param.ParamKey
names := []string{param.ParamKey}
names = append(names, p.Aliases...)
for i := range names {
names[i] = fmt.Sprintf("%q", names[i])
}
flags = append(flags, map[string]interface{}{
"ResourceKey": ctx.R,
"CommandKey": ctx.C,
"ParamKey": ctx.P,
"Names": names,
"OutputFlag": p.Category == "output",
"InputFlag": p.Category == "input",
})
}
// output/inputフラグ以外を利用する場合はdefineパッケージをimportする
for _, f := range flags {
if !f["OutputFlag"].(bool) && !f["InputFlag"].(bool) {
useImport = true
break
}
}
// outputフラグがある場合、固定でoutput-typeへの補完処理を追加する
hasOutputFlag := false
for _, f := range flags {
if f["OutputFlag"].(bool) {
hasOutputFlag = true
break
}
}
paramCommands = append(paramCommands, map[string]interface{}{
"FuncName": ctx.CompleteFlagsFuncName(),
"ParamName": ctx.InputModelTypeName(),
"Flags": flags,
"HasOutputFlag": hasOutputFlag,
})
}
err := t.Execute(b, map[string]interface{}{
"NeedDonotEditComment": !commands[0].Command.UseCustomFlagsCompletion,
"UseImport": useImport,
"Commands": paramCommands,
})
return b.String(), err
}
var completeArgsTemplate = `{{ if .NeedDonotEditComment }}// Code generated by 'github.com/sacloud/usacloud/tools/gen-command-completion'; DO NOT EDIT{{ end }}
package completion
import ({{if .UseImport}}
"fmt"{{end}}
"github.com/sacloud/usacloud/command"
"github.com/sacloud/usacloud/command/params"
)
{{range .Commands}}
func {{.FuncName}}(ctx command.Context, params *params.{{.ParamName}}, cur, prev, commandName string) {
{{.Action}}
}
{{end}}
`
var completeIDTemplate = `
if !command.GlobalOption.Valid {
return
}
{{if not .IsNeedNameComp}}if cur != "" && !isSakuraID(cur){
return
}{{end}}
client := ctx.GetAPIClient()
finder := client.Get{{.FinderFieldName}}API()
finder.SetEmpty()
// call Find()
res, err := finder.Find()
if err != nil {
return
}
type nameHolder interface {
GetName() string
}
for i := range res.{{.ListResultField}} {
fmt.Println(res.{{.ListResultField}}[i].ID)
{{if .IsNeedNameComp}}var target interface{} = &res.{{.ListResultField}}[i]
if v, ok := target.(nameHolder); ok {
fmt.Println(v.GetName())
}
{{end}}
}
`
var completeFlagsTemplate = `{{ if .NeedDonotEditComment }}// Code generated by 'github.com/sacloud/usacloud/tools/gen-command-completion'; DO NOT EDIT{{ end }}
package completion
import (
"github.com/sacloud/usacloud/schema"{{if .UseImport}}
"github.com/sacloud/usacloud/define"{{end}}
"github.com/sacloud/usacloud/command"
"github.com/sacloud/usacloud/command/params"
"fmt"
)
{{range .Commands}}
func {{.FuncName}}(ctx command.Context, params *params.{{.ParamName}} , flagName string , currentValue string) {
var comp schema.CompletionFunc
switch flagName { {{range .Flags}}{{ if not .OutputFlag }}{{ if not .InputFlag }}
case {{join .Names ", "}}:
param := define.Resources["{{.ResourceKey}}"].Commands["{{.CommandKey}}"].BuildedParams().Get("{{.ParamKey}}")
if param != nil {
comp = param.Param.CompleteFunc
}{{end}}{{end}}{{end}}
{{ if .HasOutputFlag }}case "output-type", "out":
comp = schema.CompleteInStrValues("json", "csv", "tsv")
{{ end -}}
}
if comp != nil {
words := comp(ctx, currentValue)
for _, w := range words {
fmt.Println(w)
}
}
}
{{end}}
`