upgrade gqlgen to v0.7.1

1 files changed, 119 insertions, 0 deletions

diff --git a/vendor/github.com/99designs/gqlgen/internal/imports/prune.go b/vendor/github.com/99designs/gqlgen/internal/imports/prune.go
new file mode 100644
index 00000000..d2469e83
--- /dev/null
+++ b/vendor/github.com/99designs/gqlgen/internal/imports/prune.go
@@ -0,0 +1,119 @@
+// Wrapper around x/tools/imports that only removes imports, never adds new ones.
+
+package imports
+
+import (
+	"bytes"
+	"go/ast"
+	"go/build"
+	"go/parser"
+	"go/printer"
+	"go/token"
+	"path/filepath"
+	"strings"
+
+	"golang.org/x/tools/imports"
+
+	"golang.org/x/tools/go/ast/astutil"
+)
+
+type visitFn func(node ast.Node)
+
+func (fn visitFn) Visit(node ast.Node) ast.Visitor {
+	fn(node)
+	return fn
+}
+
+// Prune removes any unused imports
+func Prune(filename string, src []byte) ([]byte, error) {
+	fset := token.NewFileSet()
+
+	file, err := parser.ParseFile(fset, filename, src, parser.ParseComments|parser.AllErrors)
+	if err != nil {
+		return nil, err
+	}
+
+	unused, err := getUnusedImports(file, filename)
+	if err != nil {
+		return nil, err
+	}
+	for ipath, name := range unused {
+		astutil.DeleteNamedImport(fset, file, name, ipath)
+	}
+	printConfig := &printer.Config{Mode: printer.TabIndent, Tabwidth: 8}
+
+	var buf bytes.Buffer
+	if err := printConfig.Fprint(&buf, fset, file); err != nil {
+		return nil, err
+	}
+
+	return imports.Process(filename, buf.Bytes(), &imports.Options{FormatOnly: true, Comments: true, TabIndent: true, TabWidth: 8})
+}
+
+func getUnusedImports(file ast.Node, filename string) (map[string]string, error) {
+	imported := map[string]*ast.ImportSpec{}
+	used := map[string]bool{}
+
+	abs, err := filepath.Abs(filename)
+	if err != nil {
+		return nil, err
+	}
+	srcDir := filepath.Dir(abs)
+
+	ast.Walk(visitFn(func(node ast.Node) {
+		if node == nil {
+			return
+		}
+		switch v := node.(type) {
+		case *ast.ImportSpec:
+			if v.Name != nil {
+				imported[v.Name.Name] = v
+				break
+			}
+			ipath := strings.Trim(v.Path.Value, `"`)
+			if ipath == "C" {
+				break
+			}
+
+			local := importPathToName(ipath, srcDir)
+
+			imported[local] = v
+		case *ast.SelectorExpr:
+			xident, ok := v.X.(*ast.Ident)
+			if !ok {
+				break
+			}
+			if xident.Obj != nil {
+				// if the parser can resolve it, it's not a package ref
+				break
+			}
+			used[xident.Name] = true
+		}
+	}), file)
+
+	for pkg := range used {
+		delete(imported, pkg)
+	}
+
+	unusedImport := map[string]string{}
+	for pkg, is := range imported {
+		if !used[pkg] && pkg != "_" && pkg != "." {
+			name := ""
+			if is.Name != nil {
+				name = is.Name.Name
+			}
+			unusedImport[strings.Trim(is.Path.Value, `"`)] = name
+		}
+	}
+
+	return unusedImport, nil
+}
+
+func importPathToName(importPath, srcDir string) (packageName string) {
+	pkg, err := build.Default.Import(importPath, srcDir, 0)
+	if err != nil {
+		return ""
+	}
+
+	return pkg.Name
+}