Rename scripts to build and add revive command as a new build tool command (#10942)

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

vendor/github.com/mgechev/revive/rule/empty-lines.go

@@ -0,0 +1,113 @@
+package rule
+
+import (
+	"go/ast"
+	"go/token"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// EmptyLinesRule lints empty lines in blocks.
+type EmptyLinesRule struct{}
+
+// Apply applies the rule to given file.
+func (r *EmptyLinesRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	onFailure := func(failure lint.Failure) {
+		failures = append(failures, failure)
+	}
+
+	w := lintEmptyLines{file, file.CommentMap(), onFailure}
+	ast.Walk(w, file.AST)
+	return failures
+}
+
+// Name returns the rule name.
+func (r *EmptyLinesRule) Name() string {
+	return "empty-lines"
+}
+
+type lintEmptyLines struct {
+	file      *lint.File
+	cmap      ast.CommentMap
+	onFailure func(lint.Failure)
+}
+
+func (w lintEmptyLines) Visit(node ast.Node) ast.Visitor {
+	block, ok := node.(*ast.BlockStmt)
+	if !ok {
+		return w
+	}
+
+	w.checkStart(block)
+	w.checkEnd(block)
+
+	return w
+}
+
+func (w lintEmptyLines) checkStart(block *ast.BlockStmt) {
+	if len(block.List) == 0 {
+		return
+	}
+
+	start := w.position(block.Lbrace)
+	firstNode := block.List[0]
+
+	if w.commentBetween(start, firstNode) {
+		return
+	}
+
+	first := w.position(firstNode.Pos())
+	if first.Line-start.Line > 1 {
+		w.onFailure(lint.Failure{
+			Confidence: 1,
+			Node:       block,
+			Category:   "style",
+			Failure:    "extra empty line at the start of a block",
+		})
+	}
+}
+
+func (w lintEmptyLines) checkEnd(block *ast.BlockStmt) {
+	if len(block.List) < 1 {
+		return
+	}
+
+	end := w.position(block.Rbrace)
+	lastNode := block.List[len(block.List)-1]
+
+	if w.commentBetween(end, lastNode) {
+		return
+	}
+
+	last := w.position(lastNode.End())
+	if end.Line-last.Line > 1 {
+		w.onFailure(lint.Failure{
+			Confidence: 1,
+			Node:       lastNode,
+			Category:   "style",
+			Failure:    "extra empty line at the end of a block",
+		})
+	}
+}
+
+func (w lintEmptyLines) commentBetween(position token.Position, node ast.Node) bool {
+	comments := w.cmap.Filter(node).Comments()
+	if len(comments) == 0 {
+		return false
+	}
+
+	for _, comment := range comments {
+		start, end := w.position(comment.Pos()), w.position(comment.End())
+		if start.Line-position.Line == 1 || position.Line-end.Line == 1 {
+			return true
+		}
+	}
+
+	return false
+}
+
+func (w lintEmptyLines) position(pos token.Pos) token.Position {
+	return w.file.ToPosition(pos)
+}