mirror of
https://github.com/mgechev/revive.git
synced 2024-12-12 10:44:59 +02:00
105 lines
2.4 KiB
Go
105 lines
2.4 KiB
Go
package rule
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"go/ast"
|
|
"go/printer"
|
|
"go/token"
|
|
"regexp"
|
|
|
|
"github.com/mgechev/revive/lint"
|
|
)
|
|
|
|
func isCgoExported(f *ast.FuncDecl) bool {
|
|
if f.Recv != nil || f.Doc == nil {
|
|
return false
|
|
}
|
|
|
|
cgoExport := regexp.MustCompile(fmt.Sprintf("(?m)^//export %s$", regexp.QuoteMeta(f.Name.Name)))
|
|
for _, c := range f.Doc.List {
|
|
if cgoExport.MatchString(c.Text) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func isIdent(expr ast.Expr, ident string) bool {
|
|
id, ok := expr.(*ast.Ident)
|
|
return ok && id.Name == ident
|
|
}
|
|
|
|
// isPkgDot checks if the expression is <pkg>.<name>
|
|
func isPkgDot(expr ast.Expr, pkg, name string) bool {
|
|
sel, ok := expr.(*ast.SelectorExpr)
|
|
return ok && isIdent(sel.X, pkg) && isIdent(sel.Sel, name)
|
|
}
|
|
|
|
func srcLine(src []byte, p token.Position) string {
|
|
// Run to end of line in both directions if not at line start/end.
|
|
lo, hi := p.Offset, p.Offset+1
|
|
for lo > 0 && src[lo-1] != '\n' {
|
|
lo--
|
|
}
|
|
for hi < len(src) && src[hi-1] != '\n' {
|
|
hi++
|
|
}
|
|
return string(src[lo:hi])
|
|
}
|
|
|
|
// pick yields a list of nodes by picking them from a sub-ast with root node n.
|
|
// Nodes are selected by applying the fselect function
|
|
func pick(n ast.Node, fselect func(n ast.Node) bool) []ast.Node {
|
|
var result []ast.Node
|
|
|
|
if n == nil {
|
|
return result
|
|
}
|
|
|
|
onSelect := func(n ast.Node) {
|
|
result = append(result, n)
|
|
}
|
|
p := picker{fselect: fselect, onSelect: onSelect}
|
|
ast.Walk(p, n)
|
|
return result
|
|
}
|
|
|
|
type picker struct {
|
|
fselect func(n ast.Node) bool
|
|
onSelect func(n ast.Node)
|
|
}
|
|
|
|
func (p picker) Visit(node ast.Node) ast.Visitor {
|
|
if p.fselect == nil {
|
|
return nil
|
|
}
|
|
|
|
if p.fselect(node) {
|
|
p.onSelect(node)
|
|
}
|
|
|
|
return p
|
|
}
|
|
|
|
// gofmt returns a string representation of an AST subtree.
|
|
func gofmt(x any) string {
|
|
buf := bytes.Buffer{}
|
|
fs := token.NewFileSet()
|
|
printer.Fprint(&buf, fs, x)
|
|
return buf.String()
|
|
}
|
|
|
|
// checkNumberOfArguments fails if the given number of arguments is not, at least, the expected one
|
|
func checkNumberOfArguments(expected int, args lint.Arguments, ruleName string) {
|
|
if len(args) < expected {
|
|
panic(fmt.Sprintf("not enough arguments for %s rule, expected %d, got %d. Please check the rule's documentation", ruleName, expected, len(args)))
|
|
}
|
|
}
|
|
|
|
var directiveCommentRE = regexp.MustCompile("^//(line |extern |export |[a-z0-9]+:[a-z0-9])") // see https://go-review.googlesource.com/c/website/+/442516/1..2/_content/doc/comment.md#494
|
|
|
|
func isDirectiveComment(line string) bool {
|
|
return directiveCommentRE.MatchString(line)
|
|
}
|