Always generate on CI (#20)

generator/cmd/generator/main.go

@@ -5,17 +5,26 @@ import (
 	"io"
 	"log"
 	"os"
+	"path/filepath"
 
 	"github.com/MetalBlueberry/go-plotly/generator"
 )
 
 type Creator struct{}
 
 func (c Creator) Create(name string) (io.WriteCloser, error) {
-	return os.Create(name)
+	abs, err := filepath.Abs(name)
+	if err != nil {
+		return nil, err
+	}
+
+	return os.Create(abs)
 }
 
+//go:generate go run main.go --clean --schema ../../schema.json --output-directory ../../../graph_objects
+
 func main() {
+	clean := flag.Bool("clean", false, "clean the output directory first. Mandatory on CI")
 	schema := flag.String("schema", "schema.json", "plotly schema")
 	outputDirectory := flag.String("output-directory", "gen/", "output directory, must exist before generation")
 
@@ -34,28 +43,45 @@ func main() {
 	r, err := generator.NewRenderer(Creator{}, root)
 	if err != nil {
 		log.Fatalf("unable to create a new renderer, %s", err)
-		panic(err)
 	}
 
 	output := *outputDirectory
 
+	if *clean {
+		err = os.RemoveAll(output)
+		if err != nil {
+			log.Fatalf("Failed to clean output directory, %s", err)
+		}
+	}
+
+	err = os.MkdirAll(output, os.ModePerm)
+	if err != nil {
+		log.Fatalf("Failed to create output dir %s, %s", *outputDirectory, err)
+
+	}
+
+	err = r.CreatePlotly(output)
+	if err != nil {
+		log.Fatalf("unable to write plotly, %s", err)
+	}
+
 	err = r.CreateTraces(output)
 	if err != nil {
-		log.Fatal("unable to write traces, %w", err)
+		log.Fatalf("unable to write traces, %s", err)
 	}
 
 	err = r.CreateLayout(output)
 	if err != nil {
-		log.Fatal("unable to write layout, %w", err)
+		log.Fatalf("unable to write layout, %s", err)
 	}
 
 	err = r.CreateConfig(output)
 	if err != nil {
-		log.Fatal("unable to write config, %w", err)
+		log.Fatalf("unable to write config, %s", err)
 	}
 
 	err = r.CreateUnmarshal(output)
 	if err != nil {
-		log.Fatal("unable to write unmarshal, %w", err)
+		log.Fatalf("unable to write unmarshal, %s", err)
 	}
 }

generator/renderer.go

@@ -46,6 +46,36 @@ func NewRenderer(fs Creator, root *Root) (*Renderer, error) {
 
 var doNotEdit = "// Code generated by go-plotly/generator. DO NOT EDIT."
 
+func (r *Renderer) CreatePlotly(dir string) error {
+	src := &bytes.Buffer{}
+	err := r.WritePlotly(src)
+	if err != nil {
+		return err
+	}
+
+	fmtsrc, err := format.Source(src.Bytes())
+	if err != nil {
+		return fmt.Errorf("cannot format source, %w", err)
+	}
+
+	file, err := r.fs.Create(path.Join(dir, "plotly_gen.go"))
+	if err != nil {
+		return fmt.Errorf("Path %s, error %s", dir, err)
+	}
+	defer file.Close()
+	_, err = file.Write(fmtsrc)
+	if err != nil {
+		return fmt.Errorf("cannot write source, %w", err)
+	}
+
+	return nil
+}
+
+// WritePlotly writes the base plotly file
+func (r *Renderer) WritePlotly(w io.Writer) error {
+	return r.tmpl.ExecuteTemplate(w, "plotly.tmpl", w)
+}
+
 // CreateTrace creates a file with the content of a trace by name
 func (r *Renderer) CreateTrace(dir string, name string) error {
 	src := &bytes.Buffer{}

generator/templates/plotly.tmpl

@@ -0,0 +1,102 @@
+
+package grob
+
+import (
+	"encoding/json"
+)
+
+// Generate the files
+//go:generate go run ../generator/cmd/generator/main.go --schema ../generator/schema.json --output-directory .
+
+// TraceType is the type for the TraceType field on every trace
+type TraceType string
+
+// Trace Every trace implements this interface
+// It is useful for autocompletion, it is a better idea to use
+// type assertions/switches to identify trace types
+type Trace interface {
+	GetType() TraceType
+}
+
+// Traces is a slice of Traces
+type Traces []Trace
+
+// Fig is the base type for figures.
+type Fig struct {
+	// Data The data to be plotted is described in an array usually called data, whose elements are trace objects of various types (e.g. scatter, bar etc) as documented in the Full Reference.
+	// https://plotly.com/javascript/reference
+	Data Traces `json:"data,omitempty"`
+
+	// Layout The layout of the plot – non-data-related visual attributes such as the title, annotations etc – is described in an object usually called layout, as documented in/ the Full Reference.
+	// https://plotly.com/javascript/reference/layout
+	Layout *Layout `json:"layout,omitempty"`
+
+	// Config High-level configuration options for the plot, such as the scroll/zoom/hover behaviour, is described in an object usually called config, as documented here. The difference between config and layout is that layout relates to the content of the plot, whereas config relates to the context in which the plot is being shown.
+	// https://plotly.com/javascript/configuration-options
+	Config *Config `json:"config,omitempty"`
+
+	// Animation is not yet implemented, feel free to insert custom a struct
+	Animation interface{} `json:"animation,omitempty"`
+}
+
+// AddTraces Is a shorthand  to add figures to a given figure. It handles the case where the Traces value is nil.
+func (fig *Fig) AddTraces(traces ...Trace) {
+	if fig.Data == nil {
+		fig.Data = make(Traces, 0)
+	}
+	fig.Data = append(fig.Data, traces...)
+}
+
+// UnmarshalJSON is a custom unmarshal function to properly handle special cases.
+func (fig *Fig) UnmarshalJSON(data []byte) error {
+	var err error
+	tmp := unmarshalFig{}
+	err = json.Unmarshal(data, &tmp)
+	if err != nil {
+		return err
+	}
+
+	fig.Layout = tmp.Layout
+	fig.Config = tmp.Config
+
+	for i := range tmp.Data {
+		trace, err := UnmarshalTrace(tmp.Data[i])
+		if err != nil {
+			return err
+		}
+		fig.AddTraces(trace)
+	}
+	return nil
+}
+
+type unmarshalFig struct {
+	Data   []json.RawMessage `json:"data,omitempty"`
+	Layout *Layout           `json:"layout,omitempty"`
+	Config *Config           `json:"config,omitempty"`
+}
+
+// Bool represents a *bool value. Needed to tell the differenc between false and nil.
+type Bool *bool
+
+var (
+	trueValue  bool = true
+	falseValue bool = false
+
+	// True is a *bool with true value
+	True Bool = &trueValue
+	// False is a *bool with false value
+	False Bool = &falseValue
+)
+
+// String is a string value, can be a []string if arrayOK is true.
+// numeric values are converted to string by plotly, so []<number> can work
+type String interface{}
+
+// Color A string describing color. Supported formats: - hex (e.g. '#d3d3d3') - rgb (e.g. 'rgb(255, 0, 0)') - rgba (e.g. 'rgb(255, 0, 0, 0.5)') - hsl (e.g. 'hsl(0, 100%, 50%)') - hsv (e.g. 'hsv(0, 100%, 100%)') - named colors (full list: http://www.w3.org/TR/css3-color/#svg-color)",
+type Color interface{}
+
+// ColorList A list of colors. Must be an {array} containing valid colors.
+type ColorList []Color
+
+// ColorScale A Plotly colorscale either picked by a name: (any of Greys, YlGnBu, Greens, YlOrRd, Bluered, RdBu, Reds, Blues, Picnic, Rainbow, Portland, Jet, Hot, Blackbody, Earth, Electric, Viridis, Cividis ) customized as an {array} of 2-element {arrays} where the first element is the normalized color level value (starting at *0* and ending at *1*), and the second item is a valid color string.
+type ColorScale interface{}