feat: Next release version

README.md

@@ -4,20 +4,36 @@ Replacement for `git describe --tags` that produces [semver](https://semver.org/
 
 ## Comparison
 
-Previous git tag | git describe --tags | git-describe-semver --fallback v0.0.0
---- | --- | ---
-`v1.2.3` | `v1.2.3` | `v1.2.3`
-`v1.2.3` | `v1.2.3-23-gabc1234` | `v1.2.4-dev.23.gabc1234`
-`v1.3.0-rc.1` | `v1.3.0-rc.1-23-gabc1234` | `v1.3.0-rc.1.dev.23.gabc1234`
-`v1.3.0-rc.1+info` | `v1.3.0-rc.1+info-23-gabc1234` | `v1.3.0-rc.1.dev.23.gabc1234+info`
-none | fail | `v0.0.0-dev.23.gabc1234`
+| Previous git tag   | git describe --tags            | git-describe-semver --fallback v0.0.0 |
+|--------------------|--------------------------------|---------------------------------------|
+| `v1.2.3`           | `v1.2.3`                       | `v1.2.3`                              |
+| `v1.2.3`           | `v1.2.3-23-gabc1234`           | `v1.2.4-dev.23.gabc1234`              |
+| `v1.3.0-rc.1`      | `v1.3.0-rc.1-23-gabc1234`      | `v1.3.0-rc.1.dev.23.gabc1234`         |
+| `v1.3.0-rc.1+info` | `v1.3.0-rc.1+info-23-gabc1234` | `v1.3.0-rc.1.dev.23.gabc1234+info`    |
+| none               | fail                           | `v0.0.0-dev.23.gabc1234`              |
+
+## Next Release
+
+| Previous git tag | git describe --tags       | git-describe-semver --fallback v0.0.0 | --next-release        |
+|------------------|---------------------------|---------------------------------------|-----------------------|
+| `v1.2.3`         | `v1.2.3`                  | `v1.2.4`                              | patch                 |
+| `v1.2.3`         | `v1.2.3-23-gabc1234`      | `v1.2.4`                              | patch                 |
+| `v1.3.0-rc.1`    | `v1.3.0-rc.1-23-gabc1234` | `v1.3.0`                              | patch / minor         |
+| `v1.3.1-rc.1`    | `v1.3.1-rc.1-23-gabc1234` | `v1.4.0`                              | minor                 |
+| `v1.0.0-rc.1`    | `v1.0.0-rc.1-23-gabc1234` | `v1.0.0`                              | major                 |
+| `v1.0.0`         | `v1.0.0`                  | `v2.0.0`                              | major                 |
+| `v1.0.1-rc.1`    | `v1.0.1-rc.1-23-gabc1234` | `v2.0.0`                              | major                 |
+| none             | fail                      | `v0.0.0`                              | patch / minor / major |
 
 ## Usage
 
-* Flag `--dir /some/git/worktree`: Git worktree directory (defaults to current directory)
+* Flag `--dir /some/git/worktree`: Git worktree directory (defaults to current directory `.`)
 * Flag `--fallback v0.0.0`: Fallback to given tag name if no tag is available
 * Flag `--drop-prefix`: Drop any present prefix (like `v`) from the output
 * Flag `--prerelease-suffix`: Adds a dash-separated suffix to the prerelease part
+* Flag `--prerelease-prefix`: Adds a dash-separated prefix to the prerelease part (defaults to `dev`)
+* Flag `--prerelease-timestamped`: Use timestamp instead of commit count for prerelease
+* Flag `--next-release`: Bump current version to next release (choices: `major`, `minor`, `patch`)
 * Flag `--format`: Changes output (use `<version>` as placeholder)
 
 ### Docker
@@ -50,5 +66,6 @@ jobs:
         prerelease-prefix: dev
         prerelease-suffix: SNAPSHOT
         prerelease-timestamped: true
+        next-release: ''
     - run: echo This is the version ${{ steps.git-describe-semver.outputs.version }}
 ```

action.yaml

@@ -2,29 +2,32 @@ name: 'Git describe semver'
 description: ''
 inputs:
   version:
-    description: 'version'
+    description: 'Which git-describe-semver release should be used?'
     default: 'latest'
   dir:
-    description: 'dir'
+    description: 'Git worktree directory (defaults to current directory)'
     default: '.'
   fallback:
-    description: 'fallback'
+    description: 'Fallback to given tag name if no tag is available'
     default: 'v0.0.0'
   drop-prefix:
-    description: 'drop-prefix'
+    description: 'Drop any present prefix (like "v") from the output'
     default: 'false'
   prerelease-prefix:
-    description: 'prerelease-suffix'
+    description: 'Adds a dash-separated prefix to the prerelease part'
     default: 'dev'
   prerelease-suffix:
-    description: 'prerelease-suffix'
+    description: 'Adds a dash-separated suffix to the prerelease part'
     default: ''
   prerelease-timestamped:
-    description: 'prerelease-timestamped'
+    description: 'Use timestamp instead of commit count for prerelease'
     default: 'false'
+  next-release:
+    description: 'Bump current version to next release (choices: "major", "minor", "patch")'
+    default: ''
 outputs:
   version:
-    description: 'version'
+    description: 'Version output from git-describe-semver'
     value: ${{ steps.git-describe-semver.outputs.version }}
 runs:
   using: 'composite'
@@ -53,6 +56,7 @@ runs:
           --prerelease-prefix="${{ inputs.prerelease-prefix }}" \
           --prerelease-suffix="${{ inputs.prerelease-suffix }}" \
           --prerelease-timestamped="${{ inputs.prerelease-timestamped }}" \
+          --next-release="${{ inputs.next-release }}" \
           --format="version=<version>" \
           $GITHUB_OUTPUT
       shell: bash

cmd/root.go

@@ -1,7 +1,6 @@
 package cmd
 
 import (
-	"flag"
 	"fmt"
 	"io"
 	"os"
@@ -10,6 +9,7 @@ import (
 	"time"
 
 	"github.com/choffmeister/git-describe-semver/internal"
+	"github.com/jessevdk/go-flags"
 )
 
 func run(dir string, opts internal.GenerateVersionOptions) (*string, error) {
@@ -35,32 +35,50 @@ func openStdoutOrFile(file string) (io.WriteCloser, error) {
 	return os.OpenFile(file, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0o644)
 }
 
+type ParserOptions struct {
+	Dir                   string `long:"dir" default:"." description:"The git worktree directory"`
+	Fallback              string `long:"fallback" description:"The first version to fallback to should there be no tag"`
+	DropPrefix            bool   `long:"drop-prefix" description:"Drop prefix from output"`
+	PrereleaseSuffix      string `long:"prerelease-suffix" description:"Suffix to add to prereleases"`
+	PrereleasePrefix      string `long:"prerelease-prefix" default:"dev" description:"Prefix to use as start of prerelease"`
+	PrereleaseTimestamped bool   `long:"prerelease-timestamped" description:"Use timestamp instead of commit count for prerelease"`
+	NextRelease           string `long:"next-release" description:"Bump current version to next release" choice:"major" choice:"minor" choice:"patch"`
+	Format                string `long:"format" description:"Format of output (use <version> as placeholder)"`
+}
+
 func Execute(version FullVersion) error {
-	dirFlag := flag.String("dir", ".", "The git worktree directory")
-	fallbackFlag := flag.String("fallback", "", "The first version to fallback to should there be no tag")
-	dropPrefixFlag := flag.Bool("drop-prefix", false, "Drop prefix from output")
-	prereleaseSuffixFlag := flag.String("prerelease-suffix", "", "Suffix to add to prereleases")
-	prereleasePrefixFlag := flag.String("prerelease-prefix", "dev", "Prefix to use as start of prerelease (default to \"dev\"))")
-	prereleaseTimestampedFlag := flag.Bool("prerelease-timestamped", false, "Use timestamp instead of commit count for prerelease")
-	formatFlag := flag.String("format", "", "Format of output")
-	flag.Parse()
+	var options ParserOptions
+	parser := flags.NewParser(&options, flags.Default)
+	args, err := parser.Parse()
+	if err != nil {
+		switch flagsErr := err.(type) {
+		case flags.ErrorType:
+			if flagsErr == flags.ErrHelp {
+				os.Exit(0)
+			}
+			os.Exit(1)
+		default:
+			os.Exit(1)
+		}
+	}
 
 	opts := internal.GenerateVersionOptions{
-		FallbackTagName:       *fallbackFlag,
-		DropTagNamePrefix:     *dropPrefixFlag,
-		PrereleaseSuffix:      *prereleaseSuffixFlag,
-		PrereleasePrefix:      *prereleasePrefixFlag,
-		PrereleaseTimestamped: *prereleaseTimestampedFlag,
-		Format:                *formatFlag,
+		FallbackTagName:       options.Fallback,
+		DropTagNamePrefix:     options.DropPrefix,
+		PrereleaseSuffix:      options.PrereleaseSuffix,
+		PrereleasePrefix:      options.PrereleasePrefix,
+		PrereleaseTimestamped: options.PrereleaseTimestamped,
+		NextRelease:           options.NextRelease,
+		Format:                options.Format,
 	}
-	result, err := run(*dirFlag, opts)
+	result, err := run(options.Dir, opts)
 	if err != nil {
 		return err
 	}
 
 	file := "-"
-	if len(flag.Args()) == 1 {
-		arg := flag.Args()[0]
+	if len(args) == 1 {
+		arg := args[0]
 		if strings.HasPrefix(arg, "$") {
 			file = os.Getenv(strings.TrimPrefix(arg, "$"))
 		} else {

go.mod

@@ -6,6 +6,7 @@ require (
 	github.com/Microsoft/go-winio v0.6.0 // indirect
 	github.com/ProtonMail/go-crypto v0.0.0-20221026131551-cf6655e29de4 // indirect
 	github.com/go-git/go-git/v5 v5.4.2
+	github.com/jessevdk/go-flags v1.5.0
 	github.com/kevinburke/ssh_config v1.2.0 // indirect
 	github.com/sergi/go-diff v1.2.0 // indirect
 	github.com/stretchr/testify v1.7.0

go.sum

@@ -13,7 +13,6 @@ github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYU
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5 h1:0CwZNZbxp69SHPdPJAN/hZIm0C4OItdklCFmMRWYpio=
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5/go.mod h1:wHh0iHkYZB8zMSxRWpUBQtwG5a7fFgvEO+odwuTv2gs=
 github.com/bwesterb/go-ristretto v1.2.0/go.mod h1:fUIoIZaG73pV5biE2Blr2xEzDoMj7NFEuV9ekS419A0=
-github.com/bwesterb/go-ristretto v1.2.2/go.mod h1:fUIoIZaG73pV5biE2Blr2xEzDoMj7NFEuV9ekS419A0=
 github.com/cloudflare/circl v1.1.0/go.mod h1:prBCrKB9DV4poKZY1l9zBXg2QJY7mvgRvtMxxK7fi4I=
 github.com/cloudflare/circl v1.3.0 h1:Anq00jxDtoyX3+aCaYUZ0vXC5r4k4epberfWGDXV1zE=
 github.com/cloudflare/circl v1.3.0/go.mod h1:+CauBF6R70Jqcyl8N2hC8pAXYbWkGIezuSbuGLtRhnw=
@@ -43,6 +42,7 @@ github.com/imdario/mergo v0.3.13 h1:lFzP57bqS/wsqKssCGmtLAb8A0wKjLGrve2q3PPVcBk=
 github.com/imdario/mergo v0.3.13/go.mod h1:4lJ1jqUDcsbIECGy0RUJAXNIhg+6ocWgb1ALK2O4oXg=
 github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 h1:BQSFePA1RWJOlocH6Fxy8MmwDt+yVQYULKfN0RoTN8A=
 github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99/go.mod h1:1lJo3i6rXxKeerYnT8Nvf0QmHCRC1n8sfWVwXF2Frvo=
+github.com/jessevdk/go-flags v1.5.0 h1:1jKYvbxEjfUl0fmqTCOfonvskHHXMjBySTLW4y9LFvc=
 github.com/jessevdk/go-flags v1.5.0/go.mod h1:Fw0T6WPc1dYxT4mKEZRfG5kJhaTDP9pj1c2EWnYs/m4=
 github.com/kevinburke/ssh_config v0.0.0-20201106050909-4977a11b4351/go.mod h1:CT57kijsi8u/K/BOFA39wgDQJ9CxiF4nAY/ojJ6r6mM=
 github.com/kevinburke/ssh_config v1.2.0 h1:x584FjTGwHzMwvHx18PXxbBVzfnxogHaAReU4gf13a4=
@@ -79,32 +79,22 @@ github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/xanzy/ssh-agent v0.3.0/go.mod h1:3s9xbODqPuuhK9JV1R321M/FlMZSBvE5aY6eAcqrDh0=
 github.com/xanzy/ssh-agent v0.3.2 h1:eKj4SX2Fe7mui28ZgnFW5fmTz1EIr7ugo5s6wDxdHBM=
 github.com/xanzy/ssh-agent v0.3.2/go.mod h1:6dzNDKs0J9rVPHPhaGCukekBHKqfl+L3KghI1Bc68Uw=
-github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 golang.org/x/crypto v0.0.0-20190219172222-a4c6cb3142f2/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
 golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
-golang.org/x/crypto v0.0.0-20220722155217-630584e8d5aa/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/crypto v0.3.0 h1:a06MkbcxBrEFc0w0QIZWXrH/9cCX6KJyWbBOIwAn+7A=
 golang.org/x/crypto v0.3.0/go.mod h1:hebNnKkNXi2UzZN1eVRvBB7co0a+JxK6XbPiWVs/3J4=
-golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
 golang.org/x/mod v0.7.0 h1:LapD9S96VoQRhi/GrNTqeBJFrUjs5UHCAtTlgwA5oZA=
 golang.org/x/mod v0.7.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
-golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20210326060303-6b1517762897/go.mod h1:uSPa2vr4CLtc/ILN5odXGNXS6mhrKVzTaCXzk9m6W3k=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
 golang.org/x/net v0.2.0 h1:sZfSu1wtKLGlWI4ZZayP0ck9Y73K1ynO6gqzTdBVdPU=
 golang.org/x/net v0.2.0/go.mod h1:KqCZLdyyvdV855qA2rE3GC2aiw5xGR5TEjj8smXukLY=
-golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
-golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190916202348-b4ddaad3f8a3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -117,28 +107,17 @@ golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210502180810-71e4cd670f79/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211007075335-d3039528d8ac/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.2.0 h1:ljd4t30dBnAvMZaQCevtY0xLLD0A+bRZXbgLMLU1F/A=
 golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.2.0 h1:z85xZCsEl7bi/KwbNADeBYoOP0++7W1ipu+aGnpwzRM=
-golang.org/x/term v0.2.0/go.mod h1:TVmDHMZPmdnySmBfhjOoOdhjzdE1h4u1VwSiw2l1Nuc=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/text v0.4.0 h1:BrVqGRd7+k1DiOgtnFvAkoQEWQvBc25ouMJM6429SFg=
-golang.org/x/text v0.4.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/tools v0.3.0 h1:SrNbZl6ECOS1qFzgTdQfWXZM9XBkiA6tkFrH9YSTPHM=
 golang.org/x/tools v0.3.0/go.mod h1:/rWhSS2+zyEVwoJf8YAX6L2f0ntZ7Kn/mGgAWcipA5k=
-golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

internal/generate.go

@@ -14,6 +14,7 @@ type GenerateVersionOptions struct {
 	PrereleaseSuffix      string
 	PrereleasePrefix      string
 	PrereleaseTimestamped bool
+	NextRelease           string
 	Format                string
 }
 
@@ -64,6 +65,7 @@ func GenerateVersion(tagName string, counter int, headHash string, timestamp tim
 			}
 		}
 	}
+	version.Bump(opts.NextRelease)
 	if opts.DropTagNamePrefix {
 		version.Prefix = ""
 	}

internal/generate_test.go

@@ -24,6 +24,21 @@ func TestGenerateVersion(t *testing.T) {
 	test("0.0.0-rc.1+foobar", 1, "abc1234", GenerateVersionOptions{PrereleasePrefix: "dev"}, "0.0.0-rc.1.dev.1.gabc1234+foobar")
 	test("v0.0.0-rc.1+foobar", 1, "abc1234", GenerateVersionOptions{PrereleasePrefix: "dev"}, "v0.0.0-rc.1.dev.1.gabc1234+foobar")
 
+	test("", 1, "abc1234", GenerateVersionOptions{FallbackTagName: "v0.0.0", NextRelease: "patch"}, "v0.0.0")
+	test("", 1, "abc1234", GenerateVersionOptions{FallbackTagName: "v0.0.0", NextRelease: "minor"}, "v0.0.0")
+	test("", 1, "abc1234", GenerateVersionOptions{FallbackTagName: "v0.0.0", NextRelease: "major"}, "v0.0.0")
+	test("v0.0.0-rc.1+foobar", 1, "abc1234", GenerateVersionOptions{NextRelease: "patch"}, "v0.0.0")
+	test("v0.0.1+foobar", 1, "abc1234", GenerateVersionOptions{NextRelease: "patch"}, "v0.0.2")
+	test("v1.2.3", 1, "abc1234", GenerateVersionOptions{NextRelease: "patch"}, "v1.2.4")
+	test("v0.1.0-rc1", 1, "abc1234", GenerateVersionOptions{NextRelease: "minor"}, "v0.1.0")
+	test("v0.1.0", 1, "abc1234", GenerateVersionOptions{NextRelease: "minor", DropTagNamePrefix: true}, "0.2.0")
+	test("v0.1.1-rc1", 1, "abc1234", GenerateVersionOptions{NextRelease: "minor"}, "v0.2.0")
+	test("v1.2.3", 1, "abc1234", GenerateVersionOptions{NextRelease: "minor"}, "v1.3.0")
+	test("v1.0.0-rc1", 1, "abc1234", GenerateVersionOptions{NextRelease: "major"}, "v1.0.0")
+	test("v1.0.0", 1, "abc1234", GenerateVersionOptions{NextRelease: "major"}, "v2.0.0")
+	test("v1.0.1-rc1", 1, "abc1234", GenerateVersionOptions{NextRelease: "major"}, "v2.0.0")
+	test("v1.2.3", 1, "abc1234", GenerateVersionOptions{NextRelease: "major", Format: "v<version>", DropTagNamePrefix: true}, "v2.0.0")
+
 	test("", 1, "abc1234", GenerateVersionOptions{FallbackTagName: "0.0.0", PrereleasePrefix: "dev"}, "0.0.0-dev.1.gabc1234")
 	test("", 1, "abc1234", GenerateVersionOptions{FallbackTagName: "v0.0.0", PrereleasePrefix: "dev"}, "v0.0.0-dev.1.gabc1234")
 

internal/semver.go

@@ -28,6 +28,38 @@ func (v SemVer) Equal(v2 SemVer) bool {
 		equalStringSlice(v.BuildMetadata, v2.BuildMetadata)
 }
 
+// Bump ...
+func (v *SemVer) Bump(nextRelease string) {
+	if nextRelease == "" {
+		return
+	}
+	isPrerelease := len(v.Prerelease) > 0
+	patch := v.Patch
+	if nextRelease == "patch" && !isPrerelease {
+		patch++
+	}
+	minor := v.Minor
+	if nextRelease == "minor" {
+		if v.Patch != 0 || !isPrerelease {
+			minor++
+		}
+		patch = 0
+	}
+	major := v.Major
+	if nextRelease == "major" {
+		if v.Patch != 0 || !isPrerelease {
+			major++
+		}
+		minor = 0
+		patch = 0
+	}
+	v.Major = major
+	v.Minor = minor
+	v.Patch = patch
+	v.Prerelease = []string{}
+	v.BuildMetadata = []string{}
+}
+
 // String ...
 func (v SemVer) String() string {
 	str := fmt.Sprintf("%s%d.%d.%d", v.Prefix, v.Major, v.Minor, v.Patch)