Added -bump-to-next flag to control which component to bump if pre-release

CHANGELOG.md

@@ -5,8 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+### Added
 ## [6.9.0] - tbd
 ### Added
+* New flag `-bump-to-next` that can be used to select which version component will be bumped
+  if version contains pre-release. Possible values are `patch` (default), `minor` and `major`.
 * Added [devbox](https://www.jetpack.io/devbox/) configuration
 
 ### Changed

README.md

@@ -101,16 +101,17 @@ plus character. A valid format string is e.g.: `x.y+m`
 
 The output and parsing of `git-semver` can be controlled with the following options.
 
-| Name                  | Description                                              |
-| ---                   | ---                                                      |
-| `-format`             | Format string as described [here](#formatting)           |
-| `-no-minor`           | Exclude minor version and all following components       |
-| `-no-patch`           | Exclude patch version and all following components       |
-| `-no-pre`             | Exclude pre-release version and all following components |
-| `-no-meta`/`-no-hash` | Exclude build metadata                                   |
-| `-prefix`             | Prefix string for version e.g.: v                        |
-| `-set-meta`           | Set buildmeta to this value                              |
-| `-guard`              | Ignore shorthand formats for pre-release versions        |
+| Name                  | Description                                                        |
+| ---                   | ---                                                                |
+| `-format`             | Format string as described [here](#formatting)                     |
+| `-no-minor`           | Exclude minor version and all following components                 |
+| `-no-patch`           | Exclude patch version and all following components                 |
+| `-no-pre`             | Exclude pre-release version and all following components           |
+| `-no-meta`/`-no-hash` | Exclude build metadata                                             |
+| `-prefix`             | Prefix string for version e.g.: v                                  |
+| `-set-meta`           | Set buildmeta to this value                                        |
+| `-guard`              | Ignore shorthand formats for pre-release versions                  |
+| `-bump-to-next`       | Bump `patch` (default), `minor` or `major` of pre-release versions |
 
 
 #### Examples
@@ -132,6 +133,12 @@ v3.5.2
 
 $ git-semver -set-meta custom
 3.5.2+custom
+
+$ git-semver -bump-to-next minor
+3.6.0-dev.22+8eaec5d3
+
+$ git-semver -bump-to-next major
+4.0.0-dev.22+8eaec5d3
 ```
 
 ### Release safeguard

main.go

@@ -23,6 +23,7 @@ type Config struct {
 	excludeMinor      bool
 	guardRelease      bool
 	matchPattern      string
+	versionComp       version.VersionComp
 	args              []string
 	stderr            io.Writer
 	stdout            io.Writer
@@ -34,6 +35,8 @@ func parseFlags(progname string, args []string) (*Config, string, error) {
 		cfg Config
 	)
 
+	cfg.versionComp = version.DefaultVersionComp
+
 	flags := flag.NewFlagSet(progname, flag.ContinueOnError)
 	flags.SetOutput(&buf)
 	flags.StringVar(&cfg.prefix, "prefix", "", "prefix of version string e.g. v (default: none)")
@@ -47,6 +50,7 @@ func parseFlags(progname string, args []string) (*Config, string, error) {
 	flags.BoolVar(&cfg.excludeMinor, "no-minor", false, "exclude pre-release version (default: false)")
 	flags.BoolVar(&cfg.excludePrefix, "no-prefix", false, "exclude version prefix (default: false)")
 	flags.BoolVar(&cfg.guardRelease, "guard", false, "ignore shorthand options if version contains pre-release (default: false)")
+	flags.Var(&cfg.versionComp, "bump-to-next", "set which version component (major, minor or patch) will be bumped if version contains pre-release (default: patch)")
 	flags.Usage = func() {
 		fmt.Fprintf(flags.Output(), "Usage: %s [opts] [<repo>]\n\nOptions:\n", progname)
 		flags.PrintDefaults()
@@ -56,6 +60,7 @@ func parseFlags(progname string, args []string) (*Config, string, error) {
 	if err != nil {
 		return nil, buf.String(), err
 	}
+
 	cfg.args = flags.Args()
 	cfg.stderr = os.Stderr
 	cfg.stdout = os.Stdout
@@ -112,7 +117,7 @@ func handle(cfg *Config, repoPath string) int {
 	if cfg.excludePrefix {
 		v.Prefix = ""
 	}
-	s, err := v.Format(selectFormat(cfg, v))
+	s, err := v.Format(selectFormat(cfg, v), cfg.versionComp)
 	if err != nil {
 		fmt.Fprintln(cfg.stderr, err)
 		return 1

version/version.go

@@ -1,6 +1,7 @@
 package version
 
 import (
+	"errors"
 	"fmt"
 	"regexp"
 	"strconv"
@@ -19,6 +20,44 @@ const (
 	NoMinorFormat = "x"
 )
 
+// Enum that specifies which version component should be bumped
+type VersionComp int
+
+const (
+	Patch VersionComp = iota
+	Minor
+	Major
+)
+
+func (t *VersionComp) String() string {
+	switch *t {
+	case Patch:
+		return "patch"
+	case Minor:
+		return "minor"
+	case Major:
+		return "major"
+	default:
+		panic(fmt.Errorf("unexpected TargetRevision value %v", *t))
+	}
+}
+
+func (t *VersionComp) Set(value string) error {
+	switch value {
+	case "patch":
+		*t = Patch
+	case "minor":
+		*t = Minor
+	case "major":
+		*t = Major
+	default:
+		return errors.New(`parse error`)
+	}
+	return nil
+}
+
+const DefaultVersionComp = Patch
+
 type buffer []byte
 
 func (b *buffer) AppendInt(i int, sep byte) {
@@ -52,7 +91,7 @@ type Version struct {
 // * m -> metadata
 // x, y and z are separated by a dot. p is seprated by a hyphen and m by a plus sing.
 // E.g.: x.y.z-p+m or x.y
-func (v Version) Format(format string) (string, error) {
+func (v Version) Format(format string, target VersionComp) (string, error) {
 	re := regexp.MustCompile(
 		`(?P<major>x)(?P<minor>\.y)?(?P<patch>\.z)?(?P<pre>-p)?(?P<meta>\+m)?`)
 
@@ -61,7 +100,26 @@ func (v Version) Format(format string) (string, error) {
 		return "", fmt.Errorf("invalid format: %s", format)
 	}
 
-	var buf buffer
+	var (
+		buf   buffer
+		major = v.Major
+		minor = v.Minor
+		patch = v.Patch
+	)
+
+	if v.Commits > 0 && v.preRelease == "" {
+		switch target {
+		case Major:
+			major++
+			minor = 0
+			patch = 0
+		case Minor:
+			minor++
+			patch = 0
+		case Patch:
+			patch++
+		}
+	}
 
 	names := re.SubexpNames()
 	for i := 0; i < len(matches); i++ {
@@ -70,26 +128,23 @@ func (v Version) Format(format string) (string, error) {
 		}
 		switch names[i] {
 		case "major":
-			buf.AppendInt(v.Major, '.')
+			buf.AppendInt(major, '.')
 		case "minor":
-			buf.AppendInt(v.Minor, '.')
+			buf.AppendInt(minor, '.')
 		case "patch":
-			patch := v.Patch
-			if v.Commits > 0 && v.preRelease == "" {
-				patch++
-			}
 			buf.AppendInt(patch, '.')
 		case "pre":
 			buf.AppendString(v.PreRelease(), '-')
 		case "meta":
 			buf.AppendString(v.Meta, '+')
 		}
 	}
+
 	return v.Prefix + string(buf), nil
 }
 
 func (v Version) String() string {
-	result, err := v.Format(FullFormat)
+	result, err := v.Format(FullFormat, DefaultVersionComp)
 	if err != nil {
 		return ""
 	}

version/version_test.go

@@ -129,48 +129,120 @@ func TestFormat(t *testing.T) {
 		f string
 		p string
 		s string
+		t VersionComp
 	}{
 		{
 			FullFormat,
 			"",
 			"1.2.4-dev.10+fcf2c8f",
+			DefaultVersionComp,
 		},
 		{
 			NoMetaFormat,
 			"",
 			"1.2.4-dev.10",
+			DefaultVersionComp,
 		},
 		{
 			NoPreFormat,
 			"",
 			"1.2.4",
+			DefaultVersionComp,
 		},
 		{
 			NoPatchFormat,
 			"",
 			"1.2",
+			DefaultVersionComp,
 		},
 		{
 			NoMinorFormat,
 			"v",
 			"v1",
+			DefaultVersionComp,
 		},
 		{
 			"x.y-p",
 			"v",
 			"v1.2-dev.10",
+			DefaultVersionComp,
+		},
+		{
+			FullFormat,
+			"",
+			"1.2.4-dev.10+fcf2c8f",
+			Patch,
+		},
+		{
+			FullFormat,
+			"",
+			"1.3.0-dev.10+fcf2c8f",
+			Minor,
+		},
+		{
+			FullFormat,
+			"",
+			"2.0.0-dev.10+fcf2c8f",
+			Major,
 		},
 	} {
 		v.Prefix = test.p
-		s, err := v.Format(test.f)
+		s, err := v.Format(test.f, test.t)
 		assert.NoError(err)
 		assert.Equal(test.s, s)
 	}
 }
 
 func TestInvalidFormat(t *testing.T) {
 	v := Version{Major: 1, Minor: 2, Patch: 3}
-	s, err := v.Format("q")
+	s, err := v.Format("q", DefaultVersionComp)
 	assert.EqualError(t, err, "invalid format: q")
 	assert.Equal(t, "", s)
 }
+
+func TestVersionCompToString(t *testing.T) {
+	assert.PanicsWithError(t, "unexpected TargetRevision value 8", func() {
+		v := VersionComp(8)
+		_ = v.String()
+	})
+
+	{
+		v := Patch
+		assert.Equal(t, "patch", v.String())
+	}
+
+	{
+		v := Minor
+		assert.Equal(t, "minor", v.String())
+	}
+
+	{
+		v := Major
+		assert.Equal(t, "major", v.String())
+	}
+}
+
+func TestVersionCompFromString(t *testing.T) {
+	{
+		var v VersionComp
+		assert.EqualError(t, v.Set("foo"), "parse error")
+	}
+
+	{
+		var v VersionComp
+		assert.NoError(t, v.Set("patch"))
+		assert.Equal(t, Patch, v)
+	}
+
+	{
+		var v VersionComp
+		assert.NoError(t, v.Set("minor"))
+		assert.Equal(t, Minor, v)
+	}
+
+	{
+		var v VersionComp
+		assert.NoError(t, v.Set("major"))
+		assert.Equal(t, Major, v)
+	}
+}