2 files changed, 153 insertions, 0 deletions
diff --git a/vendor/github.com/golangci/go-misc/deadcode/README.md b/vendor/github.com/golangci/go-misc/deadcode/README.md
new file mode 100644
index 000000000..550423128
--- /dev/null
+++ b/vendor/github.com/golangci/go-misc/deadcode/README.md
@@ -0,0 +1,18 @@
+# deadcode
+
+`deadcode` is a very simple utility which detects unused declarations in a Go package.
+
+## Usage
+```
+deadcode [-test] [packages]
+
+    -test     Include test files
+    packages  A list of packages using the same conventions as the go tool
+```
+
+## Limitations
+
+* Self-referential unused code is not currently reported
+* A single package can be tested at a time
+* Unused methods are not reported
+
diff --git a/vendor/github.com/golangci/go-misc/deadcode/deadcode.go b/vendor/github.com/golangci/go-misc/deadcode/deadcode.go
new file mode 100644
index 000000000..2e7cfc962
--- /dev/null
+++ b/vendor/github.com/golangci/go-misc/deadcode/deadcode.go
@@ -0,0 +1,135 @@
+package deadcode
+
+import (
+	"fmt"
+	"go/ast"
+	"go/token"
+	"go/types"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+
+	"golang.org/x/tools/go/loader"
+)
+
+var exitCode int
+
+var (
+	withTestFiles bool
+)
+
+type Issue struct {
+	Pos             token.Position
+	UnusedIdentName string
+}
+
+func Run(program *loader.Program) ([]Issue, error) {
+	ctx := &Context{
+		program: program,
+	}
+	report := ctx.Process()
+	var issues []Issue
+	for _, obj := range report {
+		issues = append(issues, Issue{
+			Pos:             program.Fset.Position(obj.Pos()),
+			UnusedIdentName: obj.Name(),
+		})
+	}
+
+	return issues, nil
+}
+
+func fatalf(format string, args ...interface{}) {
+	panic(fmt.Errorf(format, args...))
+}
+
+type Context struct {
+	cwd       string
+	withTests bool
+
+	program *loader.Program
+}
+
+// pos resolves a compact position encoding into a verbose one
+func (ctx *Context) pos(pos token.Pos) token.Position {
+	if ctx.cwd == "" {
+		ctx.cwd, _ = os.Getwd()
+	}
+	p := ctx.program.Fset.Position(pos)
+	f, err := filepath.Rel(ctx.cwd, p.Filename)
+	if err == nil {
+		p.Filename = f
+	}
+	return p
+}
+
+// error formats the error to standard error, adding program
+// identification and a newline
+func (ctx *Context) errorf(pos token.Pos, format string, args ...interface{}) {
+	p := ctx.pos(pos)
+	fmt.Fprintf(os.Stderr, p.String()+": "+format+"\n", args...)
+	exitCode = 2
+}
+
+func (ctx *Context) Load(args ...string) {
+	// TODO
+}
+
+func (ctx *Context) Process() []types.Object {
+	prog := ctx.program
+	var allUnused []types.Object
+	for _, pkg := range prog.Imported {
+		unused := ctx.doPackage(prog, pkg)
+		allUnused = append(allUnused, unused...)
+	}
+	for _, pkg := range prog.Created {
+		unused := ctx.doPackage(prog, pkg)
+		allUnused = append(allUnused, unused...)
+	}
+	sort.Sort(objects(allUnused))
+	return allUnused
+}
+
+func isTestFuncByName(name string) bool {
+	return strings.HasPrefix(name, "Test") || strings.HasPrefix(name, "Benchmark") || strings.HasPrefix(name, "Example")
+}
+
+func (ctx *Context) doPackage(prog *loader.Program, pkg *loader.PackageInfo) []types.Object {
+	used := make(map[types.Object]bool)
+	for _, file := range pkg.Files {
+		ast.Inspect(file, func(n ast.Node) bool {
+			id, ok := n.(*ast.Ident)
+			if !ok {
+				return true
+			}
+			obj := pkg.Info.Uses[id]
+			if obj != nil {
+				used[obj] = true
+			}
+			return false
+		})
+	}
+
+	global := pkg.Pkg.Scope()
+	var unused []types.Object
+	for _, name := range global.Names() {
+		if pkg.Pkg.Name() == "main" && name == "main" {
+			continue
+		}
+		obj := global.Lookup(name)
+		_, isSig := obj.Type().(*types.Signature)
+		pos := ctx.pos(obj.Pos())
+		isTestMethod := isSig && isTestFuncByName(obj.Name()) && strings.HasSuffix(pos.Filename, "_test.go")
+		if !used[obj] && ((pkg.Pkg.Name() == "main" && !isTestMethod) || !ast.IsExported(name)) {
+			unused = append(unused, obj)
+		}
+	}
+	return unused
+}
+
+type objects []types.Object
+
+func (s objects) Len() int           { return len(s) }
+func (s objects) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
+func (s objects) Less(i, j int) bool { return s[i].Pos() < s[j].Pos() }