🚨 A bunch of small improvements from linter

gen_file.go

@@ -2,14 +2,14 @@ package nomino
 
 import (
 	"crypto"
+	"encoding/hex"
 	"errors"
-	"fmt"
 	"hash"
 
 	"github.com/gosimple/slug"
 )
 
-// ErrMissingOriginal is the error returned by Slug if there is no filename
+// ErrMissingOriginal is the error returned by Slug if there is no filename.
 var ErrMissingOriginal = errors.New("missing original filename")
 
 func getOriginal(c *Config) (string, error) {
@@ -37,10 +37,10 @@ func Slug(lang ...string) Generator {
 	}
 }
 
-// HashingFunc is a function that generates a hash.Hash
+// HashingFunc is a function that generates a hash.Hash.
 type HashingFunc func() hash.Hash
 
-// New allows HashingFunc to be used as a Hasher
+// New allows HashingFunc to be used as a Hasher.
 func (hf HashingFunc) New() hash.Hash {
 	return hf()
 }
@@ -51,7 +51,7 @@ type Hasher interface {
 	New() hash.Hash
 }
 
-// ErrInvalidHash is returned by the Hash generator when an invalid HashType is passed
+// ErrInvalidHash is returned by the Hash generator when an invalid HashType is passed.
 var ErrInvalidHash = errors.New("invalid hash type")
 
 // Hash generates a name from a hash of the filename.
@@ -70,6 +70,6 @@ func Hash(h Hasher) Generator {
 		}
 		hs := h.New()
 		hs.Write([]byte(name))
-		return fmt.Sprintf("%x", hs.Sum(nil)), nil
+		return hex.EncodeToString(hs.Sum(nil)), nil
 	}
 }

gen_int.go

@@ -11,7 +11,7 @@ type incConf struct {
 	cb    func(int) string
 }
 
-// IncrementalOption sets an option for the Incremental Generator
+// IncrementalOption sets an option for the Incremental Generator.
 type IncrementalOption func(c *incConf)
 
 // Incremental generates a name that is a series of integers.
@@ -30,7 +30,7 @@ func Incremental(opts ...IncrementalOption) Generator {
 	}
 }
 
-// IncrementalStart sets the starting integer for Incremental
+// IncrementalStart sets the starting integer for Incremental.
 func IncrementalStart(start int) IncrementalOption {
 	return func(c *incConf) {
 		c.start = start
@@ -45,7 +45,7 @@ func IncrementalStep(step int) IncrementalOption {
 }
 
 // IncrementalFormatsets the format for the number generated by Incremental.
-// It will be formatted with Printf. This is mostly likely useful with a format like "%02d"
+// It will be formatted with Printf. This is mostly likely useful with a format like "%02d".
 func IncrementalFormat(format string) IncrementalOption {
 	return func(c *incConf) {
 		c.cb = func(i int) string {

gen_rand.go

@@ -52,10 +52,10 @@ type randConf struct {
 	length int
 }
 
-// RandomOption is an option for the Random Generator
+// RandomOption is an option for the Random Generator.
 type RandomOption func(*randConf)
 
-// RandomLength controls the length of the string generated by Random
+// RandomLength controls the length of the string generated by Random.
 func RandomLength(length int) RandomOption {
 	return func(c *randConf) {
 		c.length = length
@@ -64,11 +64,17 @@ func RandomLength(length int) RandomOption {
 
 func getRandomBytes(l int) []byte {
 	key := make([]byte, l)
-	rand.Read(key)
+	_, _ = rand.Read(key)
 	e := base62.StdEncoding.Encode(key)
 	return e[:l]
 }
 
+func fillBuffer(buff *strings.Builder, length int) {
+	for buff.Len() < length {
+		buff.Write(getRandomBytes(length - buff.Len()))
+	}
+}
+
 // Random generates a random string containing the characters [A-Za-z0-9].
 // By default, it will be eight characters long.
 func Random(opts ...RandomOption) Generator {
@@ -79,9 +85,7 @@ func Random(opts ...RandomOption) Generator {
 	return func(*Config) (string, error) {
 		var buff strings.Builder
 		buff.Grow(c.length)
-		for buff.Len() < c.length {
-			buff.Write(getRandomBytes(c.length - buff.Len()))
-		}
+		fillBuffer(&buff, c.length)
 		return buff.String(), nil
 	}
 }

gen_rand_test.go

@@ -1,7 +1,6 @@
 package nomino
 
 import (
-	"errors"
 	"testing"
 
 	"github.com/google/uuid"
@@ -18,7 +17,7 @@ func TestUUID(t *testing.T) {
 type badRead struct{}
 
 func (badRead) Read([]byte) (int, error) {
-	return 0, errors.New("sorry")
+	return 0, errTest
 }
 
 func TestUUIDFail(t *testing.T) {
@@ -26,7 +25,7 @@ func TestUUIDFail(t *testing.T) {
 	defer uuid.SetRand(nil)
 
 	_, err := UUID(nil)(nil)
-	assert.Equal(t, errors.New("sorry"), err)
+	assert.ErrorIs(t, err, errTest)
 }
 
 func TestRand(t *testing.T) {

gen_ts.go

@@ -2,10 +2,10 @@ package nomino
 
 import "time"
 
-// FileTimestamp is the default format for WithTimestamp and WithTime
+// FileTimestamp is the default format for WithTimestamp and WithTime.
 const FileTimestamp string = "2006-01-02T15-04-05-0700"
 
-// FileTimestampNoTZ is the default format for WithTimestampUTC and WithTimeUTC
+// FileTimestampNoTZ is the default format for WithTimestampUTC and WithTimeUTC.
 const FileTimestampNoTZ string = "2006-01-02T15-04-05"
 
 type timestampConf struct {
@@ -14,11 +14,11 @@ type timestampConf struct {
 	utc    bool
 }
 
-// TimestampOption provides options for the Timestamp Generator
+// TimestampOption provides options for the Timestamp Generator.
 type TimestampOption func(c *timestampConf)
 
 // Timestamp generates a a date and time. By default, it uses the current time, and will.
-// be formatted accourding to FileTimestamp
+// be formatted accourding to FileTimestamp.
 func Timestamp(opts ...TimestampOption) Generator {
 	c := timestampConf{format: FileTimestamp, ts: time.Now()}
 	for _, opt := range opts {

generators.go

@@ -21,7 +21,7 @@ func (g Generator) MakeWithConfig(c Config) (string, error) {
 	return Make(c.AddOptions(WithGenerator(g)))
 }
 
-// WithGenerator sets the specified generator
+// WithGenerator sets the specified generator.
 func WithGenerator(g Generator) Option {
 	return func(c *Config) {
 		c.generator = g
@@ -66,6 +66,7 @@ func MultiGeneratorRandomOrder(gens ...Generator) Generator {
 	}
 
 	return func(c *Config) (string, error) {
+		//nolint:gosec // This is not security sensitive, so a weak number generator is fine.
 		idx := rand.Int() % len(gens)
 		return gens[idx](c)
 	}

generators_examples_test.go

@@ -37,7 +37,7 @@ func ExampleGenerator_Make() {
 
 func ExampleMultiGeneratorInOrder() {
 	gen1 := func(*nomino.Config) (string, error) {
-		return "hello", nil
+		return "bonjour", nil
 	}
 	gen2 := func(*nomino.Config) (string, error) {
 		return "goodbye", nil
@@ -54,17 +54,17 @@ func ExampleMultiGeneratorInOrder() {
 	fmt.Println(str)
 
 	// Output:
-	// hello.txt
+	// bonjour.txt
 	// goodbye.txt
-	// hello.txt
+	// bonjour.txt
 }
 
 func ExampleMultiGeneratorRandomOrder() {
 	gen1 := func(*nomino.Config) (string, error) {
-		return "hello", nil
+		return "guten-tag", nil
 	}
 	gen2 := func(*nomino.Config) (string, error) {
-		return "goodbye", nil
+		return "wiedersehen", nil
 	}
 	gen := nomino.MultiGeneratorRandomOrder(gen1, gen2)
 

generators_test.go

@@ -7,15 +7,6 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func TestWithGenerator(t *testing.T) {
-	g := func(*Config) (string, error) { return "abc", nil }
-	var c Config
-	WithGenerator(g)(&c)
-	st, err := c.generator(&c)
-	assert.NoError(t, err)
-	assert.Equal(t, "abc", st)
-}
-
 const (
 	out1 string = "abc"
 	out2 string = "def"
@@ -30,6 +21,15 @@ var (
 	gens           = []Generator{gen1, gen2, gen3}
 )
 
+func TestWithGenerator(t *testing.T) {
+	g := func(*Config) (string, error) { return out1, nil }
+	var c Config
+	WithGenerator(g)(&c)
+	st, err := c.generator(&c)
+	assert.NoError(t, err)
+	assert.Equal(t, out1, st)
+}
+
 func TestMultiGeneratorInOrder(t *testing.T) {
 	g := MultiGeneratorInOrder(gens...)
 	st, err := g(nil)
@@ -47,16 +47,15 @@ func TestMultiGeneratorInOrder(t *testing.T) {
 }
 
 func TestMultiGeneratorInOrderOne(t *testing.T) {
-	st1 := "abc"
-	g1 := func(*Config) (string, error) { return st1, nil }
+	g1 := func(*Config) (string, error) { return out1, nil }
 	g := MultiGeneratorInOrder(g1)
 
 	st, err := g(nil)
 	assert.NoError(t, err)
-	assert.Equal(t, st1, st)
+	assert.Equal(t, out1, st)
 	st, err = g(nil)
 	assert.NoError(t, err)
-	assert.Equal(t, st1, st)
+	assert.Equal(t, out1, st)
 }
 
 func TestMultiGeneratorInOrderMissing(t *testing.T) {

make_test.go

@@ -7,6 +7,8 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
+var errTest = errors.New("sorry")
+
 func TestMake(t *testing.T) {
 	genOpt := WithGenerator(func(*Config) (string, error) { return "abc", nil })
 	testcases := []struct {
@@ -48,11 +50,10 @@ func TestMake(t *testing.T) {
 }
 
 func TestMakeErr(t *testing.T) {
-	retErr := errors.New("oops")
-	conf := NewConfig(WithGenerator(func(*Config) (string, error) { return "foobar", retErr }))
+	conf := NewConfig(WithGenerator(func(*Config) (string, error) { return "foobar", errTest }))
 	st, err := Make(conf)
 	assert.Zero(t, st)
-	assert.ErrorIs(t, err, retErr)
+	assert.ErrorIs(t, err, errTest)
 }
 
 func TestMakeDoesntChangeConf(t *testing.T) {

options.go

@@ -18,7 +18,7 @@ func WithOriginal(o string) Option {
 }
 
 // WithOriginal sets the original filename as a slug.
-// This should not be used with the Slug Generator (as it would be redundant)
+// This should not be used with the Slug Generator (as it would be redundant).
 func WithOriginalSlug(o string) Option {
 	return func(c *Config) {
 		c.original = slug.Make(o)
@@ -26,7 +26,7 @@ func WithOriginalSlug(o string) Option {
 }
 
 // WithOriginal sets the original filename as a slug, taking the language into account.
-// This should not be used with the Slug Generator (as it would be redundant)
+// This should not be used with the Slug Generator (as it would be redundant).
 func WithOriginalSlugLang(o, lang string) Option {
 	return func(c *Config) {
 		c.original = slug.MakeLang(o, lang)
@@ -47,7 +47,7 @@ func WithSuffix(s string) Option {
 	}
 }
 
-// WithoutExtension sets no extension for the generated filename. By default, it will be txt
+// WithoutExtension sets no extension for the generated filename. By default, it will be txt.
 func WithoutExtension() Option {
 	return func(c *Config) {
 		c.extension = ""