Move cncd/pipeline/pipeline/ to pipeline/ (#347)

* Refactor: move cncd/pipeline/ to pipeline/

* Refactor: move pipeline/pipeline/ to pipeline/

pipeline/multipart/coverage/coverage.go

@@ -0,0 +1,58 @@
+package coverage
+
+import (
+	"encoding/json"
+	"fmt"
+	"strconv"
+
+	"mime/multipart"
+	"net/textproto"
+)
+
+// MimeType used by coverage reports.
+const MimeType = "application/json+coverage"
+
+type (
+	// Report represents a coverage report.
+	Report struct {
+		Timestamp int64   `json:"timestmp,omitempty"`
+		Command   string  `json:"command_name,omitempty"`
+		Files     []File  `json:"files"`
+		Metrics   Metrics `json:"metrics"`
+	}
+
+	// File represents a coverage report for a single file.
+	File struct {
+		Name            string  `json:"filename"`
+		Digest          string  `json:"checksum,omitempty"`
+		Coverage        []*int  `json:"coverage"`
+		Covered         float64 `json:"covered_percent,omitempty"`
+		CoveredStrength float64 `json:"covered_strength,omitempty"`
+		CoveredLines    int     `json:"covered_lines,omitempty"`
+		TotalLines      int     `json:"lines_of_code"`
+	}
+
+	// Metrics represents total coverage metrics for all files.
+	Metrics struct {
+		Covered         float64 `json:"covered_percent"`
+		CoveredStrength float64 `json:"covered_strength"`
+		CoveredLines    int     `json:"covered_lines"`
+		TotalLines      int     `json:"total_lines"`
+	}
+)
+
+// WriteTo writes the report to multipart.Writer w.
+func (r *Report) WriteTo(w *multipart.Writer) error {
+	header := textproto.MIMEHeader{}
+	header.Set("Content-Type", MimeType)
+	header.Set("X-Covered", fmt.Sprintf("%.2f", r.Metrics.Covered))
+	header.Set("X-Covered-Lines", strconv.Itoa(r.Metrics.CoveredLines))
+	header.Set("X-Total-Lines", strconv.Itoa(r.Metrics.TotalLines))
+	part, err := w.CreatePart(header)
+	if err != nil {
+		return err
+	}
+	encoder := json.NewEncoder(part)
+	encoder.SetIndent("", "  ")
+	return encoder.Encode(r)
+}