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feat: add shuttle golang actions as an execution type (#159)
This feature adds golang as a native shell scripting alternative.
This means that you are now able to use golang functions as an alternative to
```yaml
scripts:
build:
actions:
- shell: echo "something"
```
now you can create a file
touch actions/build.go
With a function
```go
package main
func Build(ctx context.Context) error {
println("something")
}
```
Args and shuttle variables aren't currently supported and will follow up in a later PR. This sets the stage for further development, do note that the API isn't set in stone yet.- Loading branch information
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| package main | ||
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| import "context" | ||
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| func Dev(ctx context.Context) error { | ||
| println("dev") | ||
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| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| module actions | ||
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| go 1.18 | ||
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| replace github.com/lunarway/shuttle => ../../../../../ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| package cmder | ||
|
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||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "log" | ||
| "reflect" | ||
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| "github.com/spf13/cobra" | ||
| ) | ||
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| type RootCmd struct { | ||
| Cmds []*Cmd | ||
| } | ||
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| func NewRoot() *RootCmd { | ||
| cmd := &RootCmd{} | ||
|
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| return cmd | ||
| } | ||
|
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| func (rc *RootCmd) AddCmds(cmd ...*Cmd) *RootCmd { | ||
| rc.Cmds = append(rc.Cmds, cmd...) | ||
|
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| return rc | ||
| } | ||
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| func (rc *RootCmd) Execute() { | ||
| rootcmd := &cobra.Command{Use: "actions"} | ||
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| rootcmd.AddCommand( | ||
| &cobra.Command{Use: "ls", RunE: func(cmd *cobra.Command, args []string) error { | ||
| return cmd.Parent().Help() | ||
| }}, | ||
| ) | ||
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| rootcmd.AddCommand(&cobra.Command{Hidden: true, Use: "lsjson", RunE: func(cmd *cobra.Command, args []string) error { | ||
| cmdNames := make([]string, len(rc.Cmds)) | ||
| for i, cmd := range rc.Cmds { | ||
| cmd := cmd | ||
| cmdNames[i] = cmd.Name | ||
| } | ||
|
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| rawJson, err := json.Marshal(cmdNames) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| // Prints the commands and args as json to stdout | ||
| _, err = fmt.Printf("%s", string(rawJson)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| return nil | ||
| }}) | ||
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| for _, cmd := range rc.Cmds { | ||
| cmd := cmd | ||
| parameters := make([]string, len(cmd.Args)) | ||
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| cobracmd := &cobra.Command{ | ||
| Use: cmd.Name, | ||
| RunE: func(cobracmd *cobra.Command, args []string) error { | ||
| if err := cobracmd.ParseFlags(args); err != nil { | ||
| return err | ||
| } | ||
|
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| inputs := make([]reflect.Value, 0, len(cmd.Args)+1) | ||
| inputs = append(inputs, reflect.ValueOf(context.Background())) | ||
| for _, arg := range parameters { | ||
| inputs = append(inputs, reflect.ValueOf(arg)) | ||
| } | ||
|
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| reflect. | ||
| ValueOf(cmd.Func). | ||
| Call(inputs) | ||
| return nil | ||
| }, | ||
| } | ||
| for i, arg := range cmd.Args { | ||
| cobracmd.PersistentFlags().StringVar(¶meters[i], arg.Name, "", "") | ||
| _ = cobracmd.MarkPersistentFlagRequired(arg.Name) | ||
| } | ||
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| rootcmd.AddCommand(cobracmd) | ||
| } | ||
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| if err := rootcmd.Execute(); err != nil { | ||
| log.Fatalf("%v", err) | ||
| } | ||
| } | ||
|
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| type Arg struct { | ||
| Name string | ||
| } | ||
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| type Cmd struct { | ||
| Name string | ||
| Func any | ||
| Args []Arg | ||
| } | ||
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| func NewCmd(name string, f any) *Cmd { | ||
| return &Cmd{ | ||
| Name: name, | ||
| Func: f, | ||
| Args: []Arg{}, | ||
| } | ||
| } | ||
|
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| func WithArgs(cmd *Cmd, argName string) *Cmd { | ||
| cmd.Args = append(cmd.Args, Arg{Name: argName}) | ||
| return cmd | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| package codegen | ||
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| import ( | ||
| "context" | ||
| "embed" | ||
| "html/template" | ||
| "os" | ||
| "path" | ||
| "strings" | ||
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| "github.com/lunarway/shuttle/pkg/executors/golang/discover" | ||
| "github.com/lunarway/shuttle/pkg/executors/golang/parser" | ||
| ) | ||
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| var ( | ||
| //go:embed templates/mainFile.tmpl | ||
| mainFileTmpl embed.FS | ||
| ) | ||
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| func GenerateMainFile( | ||
| ctx context.Context, | ||
| shuttlelocaldir string, | ||
| actions *discover.ActionsDiscovered, | ||
| functions []*parser.Function, | ||
| ) error { | ||
| tmpmainfile := path.Join(shuttlelocaldir, "tmp/main.go") | ||
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| file, err := os.Create(tmpmainfile) | ||
| if err != nil { | ||
| return err | ||
| } | ||
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| tmpl := template. | ||
| Must( | ||
| template. | ||
| New("mainFile.tmpl"). | ||
| Funcs(map[string]any{ | ||
| "lower": strings.ToLower, | ||
| }). | ||
| ParseFS(mainFileTmpl, "templates/mainFile.tmpl"), | ||
| ) | ||
|
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| err = tmpl.Execute(file, functions) | ||
|
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| return err | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| package codegen | ||
|
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| import ( | ||
| "context" | ||
| "os/exec" | ||
| "path" | ||
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| "github.com/lunarway/shuttle/pkg/ui" | ||
| ) | ||
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| func CompileBinary(ctx context.Context, ui *ui.UI, shuttlelocaldir string) (string, error) { | ||
| cmd := exec.Command("go", "build") | ||
| cmd.Dir = path.Join(shuttlelocaldir, "tmp") | ||
|
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| output, err := cmd.CombinedOutput() | ||
| if err != nil { | ||
| ui.Verboseln("compile-binary output: %s", string(output)) | ||
| return "", err | ||
| } | ||
|
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| return path.Join(shuttlelocaldir, "tmp", "actions"), nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| package codegen | ||
|
|
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| import ( | ||
| "context" | ||
| "os/exec" | ||
| "path" | ||
|
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| "github.com/lunarway/shuttle/pkg/ui" | ||
| ) | ||
|
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| func Format(ctx context.Context, ui *ui.UI, shuttlelocaldir string) error { | ||
| cmd := exec.Command("go", "fmt", "./...") | ||
| cmd.Dir = path.Join(shuttlelocaldir, "tmp") | ||
|
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| output, err := cmd.CombinedOutput() | ||
| if err != nil { | ||
| ui.Errorln("go fmt: %s, error: %v", string(output), err) | ||
| return err | ||
| } | ||
|
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| return nil | ||
| } |
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