[feature] add func.saferun, automatically recover error when func pan…

…ic (#123)

.gitignore

@@ -20,3 +20,4 @@
 .DS_Store
 
 testdata/
+vendor/

func.go

@@ -1,5 +1,7 @@
 package goutil
 
+import "fmt"
+
 // Go is a basic promise implementation: it wraps calls a function in a goroutine
 // and returns a channel which will later return the function's return value.
 func Go(f func() error) error {
@@ -28,3 +30,53 @@ func CallOrElse(cond bool, okFn, elseFn ErrFunc) error {
 	}
 	return elseFn()
 }
+
+// SafeRun sync run a func. If the func panics, the panic value is returned as an error.
+func SafeRun(fn func()) (err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			if e, ok := r.(error); ok {
+				err = e
+			} else {
+				err = fmt.Errorf("%v", r)
+			}
+		}
+	}()
+	fn()
+	return nil
+}
+
+// SafeRun sync run a func with error.
+// If the func panics, the panic value is returned as an error.
+func SafeRunWithError(fn func() error) (err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			if e, ok := r.(error); ok {
+				err = e
+			} else {
+				err = fmt.Errorf("%v", r)
+			}
+		}
+	}()
+	return fn()
+}
+
+// SafeGo async run a func.
+// If the func panics, the panic value will be handle by errHandler.
+func SafeGo(fn func(), errHandler func(error)) {
+	go func() {
+		if err := SafeRun(fn); err != nil {
+			errHandler(err)
+		}
+	}()
+}
+
+// SafeGoWithError async run a func with error.
+// If the func panics, the panic value will be handle by errHandler.
+func SafeGoWithError(fn func() error, errHandler func(error)) {
+	go func() {
+		if err := SafeRunWithError(fn); err != nil {
+			errHandler(err)
+		}
+	}()
+}

go.mod

@@ -4,6 +4,7 @@ go 1.18
 
 require (
 	github.com/gookit/color v1.5.4
+	github.com/pkg/errors v0.9.1
 	golang.org/x/sync v0.3.0
 	golang.org/x/sys v0.12.0
 	golang.org/x/term v0.12.0

go.sum

@@ -1,6 +1,8 @@
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/gookit/color v1.5.4 h1:FZmqs7XOyGgCAxmWyPslpiok1k05wmY3SJTytgvYFs0=
 github.com/gookit/color v1.5.4/go.mod h1:pZJOeOS8DM43rXbp4AZo1n9zCU2qjpcRko0b6/QJi9w=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e h1:JVG44RsyaB9T2KIHavMF/ppJZNG9ZpyihvCd0w101no=