fix

summary.go

@@ -0,0 +1,80 @@
+package binfo
+
+import (
+	"fmt"
+	"strings"
+)
+
+type SummaryMode uint
+
+const (
+	ModeModule SummaryMode = 1 << iota
+	ModeBuild
+	ModeCGO
+	ModeVCS
+	ModeMultiline
+)
+
+func (b Binfo) Summarize(name string, version string, mode SummaryMode) string {
+	wants := func(test SummaryMode) bool {
+		return mode&test == test
+	}
+
+	var (
+		brk string
+		sep string
+	)
+
+	if wants(ModeMultiline) {
+		brk = "\n"
+		sep = "\n"
+	} else {
+		brk = " "
+		sep = ", "
+	}
+
+	lines := make([]string, 4)
+
+	if wants(ModeModule) {
+		lines = append(
+			lines,
+			fmt.Sprintf("module %s (%s) (sum %s)", b.Module.Path, b.Module.Version, b.Module.Sum),
+		)
+	}
+
+	if wants(ModeBuild) {
+		lines = append(
+			lines,
+			fmt.Sprintf("built with %s (%s) (mode %s)", b.Build.Compiler, b.Build.GoVersion, b.Build.Mode),
+		)
+	}
+
+	if wants(ModeCGO) {
+		if b.CGO.Enabled {
+			lines = append(
+				lines,
+				fmt.Sprintf("with cgo (c %q) (cpp %q) (cxx %q) (ld %q)", b.CGO.Flags.C, b.CGO.Flags.CPP, b.CGO.Flags.CXX, b.CGO.Flags.LD),
+			)
+		} else {
+			lines = append(
+				lines,
+				"without cgo",
+			)
+		}
+	}
+
+	if wants(ModeVCS) {
+		lines = append(
+			lines,
+			fmt.Sprintf("via %s (rev %s) (at %s)", b.VCS.Name, b.VCS.Revision, b.VCS.Time.Format("2006-01-02 15:04:05")),
+		)
+	}
+
+	j := strings.Join(lines, sep)
+
+	if name == "" {
+		return j
+	} else {
+		return fmt.Sprintf("%s %s:%s%s", name, version, brk, j)
+	}
+}