package state import ( "crypto/sha256" "encoding/json" "fmt" "io/ioutil" "path" "path/filepath" "strings" "cuelang.org/go/cue" "go.dagger.io/dagger/compiler" ) // An input is a value or artifact supplied by the user. // // - A value is any structured data which can be encoded as cue. // // - An artifact is a piece of data, like a source code checkout, // binary bundle, docker image, database backup etc. // // Artifacts can be passed as inputs, generated dynamically from // other inputs, and received as outputs. // Under the hood, an artifact is encoded as a LLB pipeline, and // attached to the cue configuration as a // type Input struct { Dir *dirInput `yaml:"dir,omitempty"` Git *gitInput `yaml:"git,omitempty"` Docker *dockerInput `yaml:"docker,omitempty"` Secret *secretInput `yaml:"secret,omitempty"` Text *textInput `yaml:"text,omitempty"` JSON *jsonInput `yaml:"json,omitempty"` YAML *yamlInput `yaml:"yaml,omitempty"` File *fileInput `yaml:"file,omitempty"` Bool *boolInput `yaml:"bool,omitempty"` Socket *socketInput `yaml:"socket,omitempty"` } func (i Input) Compile(key string, state *State) (*compiler.Value, error) { switch { case i.Dir != nil: return i.Dir.Compile(key, state) case i.Git != nil: return i.Git.Compile(key, state) case i.Docker != nil: return i.Docker.Compile(key, state) case i.Text != nil: return i.Text.Compile(key, state) case i.Secret != nil: return i.Secret.Compile(key, state) case i.JSON != nil: return i.JSON.Compile(key, state) case i.YAML != nil: return i.YAML.Compile(key, state) case i.File != nil: return i.File.Compile(key, state) case i.Bool != nil: return i.Bool.Compile(key, state) case i.Socket != nil: return i.Socket.Compile(key, state) default: return nil, fmt.Errorf("input has not been set") } } // An input artifact loaded from a local directory func DirInput(path string, include []string, exclude []string) Input { return Input{ Dir: &dirInput{ Path: path, Include: include, Exclude: exclude, }, } } type dirInput struct { Path string `yaml:"path,omitempty"` Include []string `yaml:"include,omitempty"` Exclude []string `yaml:"exclude,omitempty"` } func (dir dirInput) Compile(_ string, state *State) (*compiler.Value, error) { // FIXME: serialize an intermediate struct, instead of generating cue source // json.Marshal([]string{}) returns []byte("null"), which wreaks havoc // in Cue because `null` is not a `[...string]` includeLLB := []byte("[]") if len(dir.Include) > 0 { var err error includeLLB, err = json.Marshal(dir.Include) if err != nil { return nil, err } } excludeLLB := []byte("[]") if len(dir.Exclude) > 0 { var err error excludeLLB, err = json.Marshal(dir.Exclude) if err != nil { return nil, err } } p := dir.Path if !filepath.IsAbs(p) { p = filepath.Clean(path.Join(state.Project, dir.Path)) } if !strings.HasPrefix(p, state.Project) { return nil, fmt.Errorf("%q is outside the project", dir.Path) } llb := fmt.Sprintf( `#up: [{do:"local",dir:"%s", include:%s, exclude:%s}]`, p, includeLLB, excludeLLB, ) return compiler.Compile("", llb) } // An input artifact loaded from a git repository type gitInput struct { Remote string `yaml:"remote,omitempty"` Ref string `yaml:"ref,omitempty"` Dir string `yaml:"dir,omitempty"` } func GitInput(remote, ref, dir string) Input { return Input{ Git: &gitInput{ Remote: remote, Ref: ref, Dir: dir, }, } } func (git gitInput) Compile(_ string, _ *State) (*compiler.Value, error) { ref := "HEAD" if git.Ref != "" { ref = git.Ref } dir := "" if git.Dir != "" { dir = fmt.Sprintf(`,{do:"subdir", dir:"%s"}`, git.Dir) } return compiler.Compile("", fmt.Sprintf( `#up: [{do:"fetch-git", remote:"%s", ref:"%s"}%s]`, git.Remote, ref, dir, )) } // An input artifact loaded from a docker container func DockerInput(ref string) Input { return Input{ Docker: &dockerInput{ Ref: ref, }, } } type dockerInput struct { Ref string `yaml:"ref,omitempty"` } func (i dockerInput) Compile(_ string, _ *State) (*compiler.Value, error) { panic("NOT IMPLEMENTED") } // An input value encoded as text func TextInput(data string) Input { i := textInput(data) return Input{ Text: &i, } } type textInput string func (i textInput) Compile(_ string, _ *State) (*compiler.Value, error) { return compiler.Compile("", fmt.Sprintf("%q", i)) } // A secret input value func SecretInput(data string) Input { i := secretInput(data) return Input{ Secret: &i, } } type secretInput string func (i secretInput) Compile(key string, _ *State) (*compiler.Value, error) { hash := sha256.New() hash.Write([]byte(key)) checksum := hash.Sum([]byte(i.PlainText())) secretValue := fmt.Sprintf(`{id:"secret=%s;hash=%x"}`, key, checksum) return compiler.Compile("", secretValue) } func (i secretInput) PlainText() string { return string(i) } // An input value encoded as Bool func BoolInput(data string) Input { i := boolInput(data) return Input{ Bool: &i, } } type boolInput string func (i boolInput) Compile(_ string, _ *State) (*compiler.Value, error) { s := map[boolInput]struct{}{ "true": {}, "false": {}, } if _, ok := s[i]; ok { return compiler.DecodeJSON("", []byte(i)) } return nil, fmt.Errorf("%q is not a valid boolean: ", i) } // An input value encoded as JSON func JSONInput(data string) Input { i := jsonInput(data) return Input{ JSON: &i, } } type jsonInput string func (i jsonInput) Compile(_ string, _ *State) (*compiler.Value, error) { return compiler.DecodeJSON("", []byte(i)) } // An input value encoded as YAML func YAMLInput(data string) Input { i := yamlInput(data) return Input{ YAML: &i, } } type yamlInput string func (i yamlInput) Compile(_ string, _ *State) (*compiler.Value, error) { return compiler.DecodeYAML("", []byte(i)) } func FileInput(data string) Input { return Input{ File: &fileInput{ Path: data, }, } } type fileInput struct { Path string `json:"data,omitempty"` } func (i fileInput) Compile(_ string, _ *State) (*compiler.Value, error) { data, err := ioutil.ReadFile(i.Path) if err != nil { return nil, err } value := compiler.NewValue() if err := value.FillPath(cue.MakePath(), data); err != nil { return nil, err } return value, nil } // A socket input value func SocketInput(data string) Input { i := socketInput{ Unix: data, } return Input{ Socket: &i, } } type socketInput struct { Unix string `json:"unix,omitempty"` } func (i socketInput) Compile(_ string, _ *State) (*compiler.Value, error) { socketValue := fmt.Sprintf(`{unix: %q}`, i.Unix) return compiler.Compile("", socketValue) }