Add logging provider

providers/log/log.go

@@ -0,0 +1,44 @@
+package log
+
+import "fmt"
+import "log"
+import "html/template"
+import "git.tebibyte.media/sashakoshka/step"
+
+var _ step.FuncProviderFor = new(Provider)
+
+// Provider provides MIME functions.
+type Provider struct {
+	
+}
+
+// Package fulfills the step.Provider interface.
+func (this *Provider) Package () string {
+	return "mime"
+}
+
+// FuncMapFor fulfills the step.FuncProviderFor interface.
+func (this *Provider) FuncMapFor (document *step.Document) template.FuncMap {
+	stat := &state {
+		document: document,
+	}
+	return template.FuncMap {
+		"println": stat.funcPrintln,
+		"errorln": stat.funcPrintln,
+		"debugln": stat.funcDebugln,
+	}
+}
+
+type state struct {
+	document *step.Document
+}
+
+func (this *state) funcPrintln (v ...any) string {
+	log.Printf("(i) %s: %s", this.document.Name, fmt.Sprintln(v))
+	return ""
+}
+
+func (this *state) funcDebugln (v ...any) string {
+	log.Printf("DBG %s: %s", this.document.Name, fmt.Sprintln(v))
+	return ""
+}