From 14b240af8fef269d2c1d5dde2fff192b656c50f3 Mon Sep 17 00:00:00 2001
From: Michael Muré <batolettre@gmail.com>
Date: Sun, 20 Jan 2019 15:41:27 +0100
Subject: identity: more cleaning and fixes after a code review

---
 vendor/gotest.tools/internal/source/source.go | 163 --------------------------
 1 file changed, 163 deletions(-)
 delete mode 100644 vendor/gotest.tools/internal/source/source.go

(limited to 'vendor/gotest.tools/internal/source/source.go')

diff --git a/vendor/gotest.tools/internal/source/source.go b/vendor/gotest.tools/internal/source/source.go
deleted file mode 100644
index a05933cc..00000000
--- a/vendor/gotest.tools/internal/source/source.go
+++ /dev/null
@@ -1,163 +0,0 @@
-package source // import "gotest.tools/internal/source"
-
-import (
-	"bytes"
-	"fmt"
-	"go/ast"
-	"go/format"
-	"go/parser"
-	"go/token"
-	"os"
-	"runtime"
-	"strconv"
-	"strings"
-
-	"github.com/pkg/errors"
-)
-
-const baseStackIndex = 1
-
-// FormattedCallExprArg returns the argument from an ast.CallExpr at the
-// index in the call stack. The argument is formatted using FormatNode.
-func FormattedCallExprArg(stackIndex int, argPos int) (string, error) {
-	args, err := CallExprArgs(stackIndex + 1)
-	if err != nil {
-		return "", err
-	}
-	return FormatNode(args[argPos])
-}
-
-func getNodeAtLine(filename string, lineNum int) (ast.Node, error) {
-	fileset := token.NewFileSet()
-	astFile, err := parser.ParseFile(fileset, filename, nil, parser.AllErrors)
-	if err != nil {
-		return nil, errors.Wrapf(err, "failed to parse source file: %s", filename)
-	}
-
-	node := scanToLine(fileset, astFile, lineNum)
-	if node == nil {
-		return nil, errors.Errorf(
-			"failed to find an expression on line %d in %s", lineNum, filename)
-	}
-	return node, nil
-}
-
-func scanToLine(fileset *token.FileSet, node ast.Node, lineNum int) ast.Node {
-	v := &scanToLineVisitor{lineNum: lineNum, fileset: fileset}
-	ast.Walk(v, node)
-	return v.matchedNode
-}
-
-type scanToLineVisitor struct {
-	lineNum     int
-	matchedNode ast.Node
-	fileset     *token.FileSet
-}
-
-func (v *scanToLineVisitor) Visit(node ast.Node) ast.Visitor {
-	if node == nil || v.matchedNode != nil {
-		return nil
-	}
-	if v.nodePosition(node).Line == v.lineNum {
-		v.matchedNode = node
-		return nil
-	}
-	return v
-}
-
-// In golang 1.9 the line number changed from being the line where the statement
-// ended to the line where the statement began.
-func (v *scanToLineVisitor) nodePosition(node ast.Node) token.Position {
-	if goVersionBefore19 {
-		return v.fileset.Position(node.End())
-	}
-	return v.fileset.Position(node.Pos())
-}
-
-var goVersionBefore19 = isGOVersionBefore19()
-
-func isGOVersionBefore19() bool {
-	version := runtime.Version()
-	// not a release version
-	if !strings.HasPrefix(version, "go") {
-		return false
-	}
-	version = strings.TrimPrefix(version, "go")
-	parts := strings.Split(version, ".")
-	if len(parts) < 2 {
-		return false
-	}
-	minor, err := strconv.ParseInt(parts[1], 10, 32)
-	return err == nil && parts[0] == "1" && minor < 9
-}
-
-func getCallExprArgs(node ast.Node) ([]ast.Expr, error) {
-	visitor := &callExprVisitor{}
-	ast.Walk(visitor, node)
-	if visitor.expr == nil {
-		return nil, errors.New("failed to find call expression")
-	}
-	return visitor.expr.Args, nil
-}
-
-type callExprVisitor struct {
-	expr *ast.CallExpr
-}
-
-func (v *callExprVisitor) Visit(node ast.Node) ast.Visitor {
-	if v.expr != nil || node == nil {
-		return nil
-	}
-	debug("visit (%T): %s", node, debugFormatNode{node})
-
-	if callExpr, ok := node.(*ast.CallExpr); ok {
-		v.expr = callExpr
-		return nil
-	}
-	return v
-}
-
-// FormatNode using go/format.Node and return the result as a string
-func FormatNode(node ast.Node) (string, error) {
-	buf := new(bytes.Buffer)
-	err := format.Node(buf, token.NewFileSet(), node)
-	return buf.String(), err
-}
-
-// CallExprArgs returns the ast.Expr slice for the args of an ast.CallExpr at
-// the index in the call stack.
-func CallExprArgs(stackIndex int) ([]ast.Expr, error) {
-	_, filename, lineNum, ok := runtime.Caller(baseStackIndex + stackIndex)
-	if !ok {
-		return nil, errors.New("failed to get call stack")
-	}
-	debug("call stack position: %s:%d", filename, lineNum)
-
-	node, err := getNodeAtLine(filename, lineNum)
-	if err != nil {
-		return nil, err
-	}
-	debug("found node (%T): %s", node, debugFormatNode{node})
-
-	return getCallExprArgs(node)
-}
-
-var debugEnabled = os.Getenv("GOTESTYOURSELF_DEBUG") != ""
-
-func debug(format string, args ...interface{}) {
-	if debugEnabled {
-		fmt.Fprintf(os.Stderr, "DEBUG: "+format+"\n", args...)
-	}
-}
-
-type debugFormatNode struct {
-	ast.Node
-}
-
-func (n debugFormatNode) String() string {
-	out, err := FormatNode(n.Node)
-	if err != nil {
-		return fmt.Sprintf("failed to format %s: %s", n.Node, err)
-	}
-	return out
-}
-- 
cgit