gitea/vendor/github.com/mgechev/revive/rule/function-length.go
6543 792b4dba2c
[Vendor] Update directly used dependencys (#15593)
* update github.com/blevesearch/bleve v2.0.2 -> v2.0.3

* github.com/denisenkom/go-mssqldb v0.9.0 -> v0.10.0

* github.com/editorconfig/editorconfig-core-go v2.4.1 -> v2.4.2

* github.com/go-chi/cors v1.1.1 -> v1.2.0

* github.com/go-git/go-billy v5.0.0 -> v5.1.0

* github.com/go-git/go-git v5.2.0 -> v5.3.0

* github.com/go-ldap/ldap v3.2.4 -> v3.3.0

* github.com/go-redis/redis v8.6.0 -> v8.8.2

* github.com/go-sql-driver/mysql v1.5.0 -> v1.6.0

* github.com/go-swagger/go-swagger v0.26.1 -> v0.27.0

* github.com/lib/pq v1.9.0 -> v1.10.1

* github.com/mattn/go-sqlite3 v1.14.6 -> v1.14.7

* github.com/go-testfixtures/testfixtures v3.5.0 -> v3.6.0

* github.com/issue9/identicon v1.0.1 -> v1.2.0

* github.com/klauspost/compress v1.11.8 -> v1.12.1

* github.com/mgechev/revive v1.0.3 -> v1.0.6

* github.com/microcosm-cc/bluemonday v1.0.7 -> v1.0.8

* github.com/niklasfasching/go-org v1.4.0 -> v1.5.0

* github.com/olivere/elastic v7.0.22 -> v7.0.24

* github.com/pelletier/go-toml v1.8.1 -> v1.9.0

* github.com/prometheus/client_golang v1.9.0 -> v1.10.0

* github.com/xanzy/go-gitlab v0.44.0 -> v0.48.0

* github.com/yuin/goldmark v1.3.3 -> v1.3.5

* github.com/6543/go-version v1.2.4 -> v1.3.1

* do github.com/lib/pq v1.10.0 -> v1.10.1 again ...
2021-04-22 20:08:53 -04:00

154 lines
3.8 KiB
Go
Vendored

package rule
import (
"fmt"
"go/ast"
"reflect"
"github.com/mgechev/revive/lint"
)
// FunctionLength lint.
type FunctionLength struct{}
// Apply applies the rule to given file.
func (r *FunctionLength) Apply(file *lint.File, arguments lint.Arguments) []lint.Failure {
maxStmt, maxLines := r.parseArguments(arguments)
var failures []lint.Failure
walker := lintFuncLength{
file: file,
maxStmt: int(maxStmt),
maxLines: int(maxLines),
onFailure: func(failure lint.Failure) {
failures = append(failures, failure)
},
}
ast.Walk(walker, file.AST)
return failures
}
// Name returns the rule name.
func (r *FunctionLength) Name() string {
return "function-length"
}
func (r *FunctionLength) parseArguments(arguments lint.Arguments) (maxStmt int64, maxLines int64) {
if len(arguments) != 2 {
panic(fmt.Sprintf(`invalid configuration for "function-length" rule, expected 2 arguments but got %d`, len(arguments)))
}
maxStmt, maxStmtOk := arguments[0].(int64)
if !maxStmtOk {
panic(fmt.Sprintf(`invalid configuration value for max statements in "function-length" rule; need int64 but got %T`, arguments[0]))
}
if maxStmt < 0 {
panic(fmt.Sprintf(`the configuration value for max statements in "function-length" rule cannot be negative, got %d`, maxStmt))
}
maxLines, maxLinesOk := arguments[1].(int64)
if !maxLinesOk {
panic(fmt.Sprintf(`invalid configuration value for max lines in "function-length" rule; need int64 but got %T`, arguments[1]))
}
if maxLines < 0 {
panic(fmt.Sprintf(`the configuration value for max statements in "function-length" rule cannot be negative, got %d`, maxLines))
}
return
}
type lintFuncLength struct {
file *lint.File
maxStmt int
maxLines int
onFailure func(lint.Failure)
}
func (w lintFuncLength) Visit(n ast.Node) ast.Visitor {
node, ok := n.(*ast.FuncDecl)
if !ok {
return w
}
body := node.Body
if body == nil || len(node.Body.List) == 0 {
return nil
}
if w.maxStmt > 0 {
stmtCount := w.countStmts(node.Body.List)
if stmtCount > w.maxStmt {
w.onFailure(lint.Failure{
Confidence: 1,
Failure: fmt.Sprintf("maximum number of statements per function exceeded; max %d but got %d", w.maxStmt, stmtCount),
Node: node,
})
}
}
if w.maxLines > 0 {
lineCount := w.countLines(node.Body)
if lineCount > w.maxLines {
w.onFailure(lint.Failure{
Confidence: 1,
Failure: fmt.Sprintf("maximum number of lines per function exceeded; max %d but got %d", w.maxLines, lineCount),
Node: node,
})
}
}
return nil
}
func (w lintFuncLength) countLines(b *ast.BlockStmt) int {
return w.file.ToPosition(b.End()).Line - w.file.ToPosition(b.Pos()).Line - 1
}
func (w lintFuncLength) countStmts(b []ast.Stmt) int {
count := 0
for _, s := range b {
switch stmt := s.(type) {
case *ast.BlockStmt:
count += w.countStmts(stmt.List)
case *ast.IfStmt:
count += 1 + w.countBodyListStmts(stmt)
if stmt.Else != nil {
elseBody, ok := stmt.Else.(*ast.BlockStmt)
if ok {
count += w.countStmts(elseBody.List)
}
}
case *ast.ForStmt, *ast.RangeStmt,
*ast.SwitchStmt, *ast.TypeSwitchStmt, *ast.SelectStmt:
count += 1 + w.countBodyListStmts(stmt)
case *ast.CaseClause:
count += w.countStmts(stmt.Body)
case *ast.AssignStmt:
count += 1 + w.countFuncLitStmts(stmt.Rhs[0])
case *ast.GoStmt:
count += 1 + w.countFuncLitStmts(stmt.Call.Fun)
case *ast.DeferStmt:
count += 1 + w.countFuncLitStmts(stmt.Call.Fun)
default:
count++
}
}
return count
}
func (w lintFuncLength) countFuncLitStmts(stmt ast.Expr) int {
if block, ok := stmt.(*ast.FuncLit); ok {
return w.countStmts(block.Body.List)
}
return 0
}
func (w lintFuncLength) countBodyListStmts(t interface{}) int {
i := reflect.ValueOf(t).Elem().FieldByName(`Body`).Elem().FieldByName(`List`).Interface()
return w.countStmts(i.([]ast.Stmt))
}