ci: assign version string using release-please and GoReleaser

.github/workflows/release-please.yml

@@ -16,3 +16,6 @@ jobs:
           token: ${{ secrets.HCLOUD_BOT_TOKEN }}
           config-file: .github/release-please-config.json
           manifest-file: .github/release-please-manifest.json
+
+          extra-files: |
+            version/version.go

.goreleaser.yml

@@ -7,7 +7,9 @@ builds:
     main: ./cmd/hcloud/main.go
     binary: hcloud
     ldflags:
-      - -w -X github.com/hetznercloud/cli/internal/version.Version={{.Version}}
+      - -w
+      - -X {{ .ModulePath }}/internal/version.Version={{ .Version }}
+      - -X {{ .ModulePath }}/internal/version.VersionPrerelease={{- if .IsSnapshot -}}dev+{{ .ShortCommit }}{{- end -}}
     env:
       - CGO_ENABLED=0
     goos:
@@ -27,7 +29,9 @@ builds:
     main: ./cmd/hcloud/main.go
     binary: hcloud
     ldflags:
-      - -w -X github.com/hetznercloud/cli/internal/version.Version={{.Version}}
+      - -w
+      - -X {{ .ModulePath }}/internal/version.Version={{ .Version }}
+      - -X {{ .ModulePath }}/internal/version.VersionPrerelease={{- if .IsSnapshot -}}dev+{{ .ShortCommit }}{{- end -}}
     env:
       - CGO_ENABLED=0
     goos:
@@ -40,6 +44,9 @@ builds:
         - cmd: bash script/gon.sh "{{ .Path }}"
           output: true
 
+snapshot:
+  name_template: "{{ .Version }}"
+
 checksum:
   name_template: checksums.txt
   algorithm: sha256

internal/cmd/version/version.go

@@ -19,6 +19,6 @@ func NewCommand(cli *state.State) *cobra.Command {
 }
 
 func runVersion(cli *state.State, cmd *cobra.Command, args []string) error {
-	cmd.Printf("hcloud %s\n", version.Version)
+	cmd.Printf("hcloud %s\n", version.FullVersion)
 	return nil
 }

internal/version/version.go

@@ -1,4 +1,23 @@
 package version
 
-// Version is set via compiler flags (see goreleaser config)
-var Version = "unknown"
+var (
+	// Version is the main version number that is being run at the moment.
+	Version = "1.41.1" // x-release-please-version
+
+	// Tag is A pre-release marker for the Version. If this is ""
+	// (empty string) then it means that it is a final release. Otherwise, this
+	// is a pre-release such as "dev" (in development), "beta", "rc1", etc.
+	//
+	// For releases, GoReleaser will automatically set this to an empty string.
+	Tag = "dev"
+
+	// FullVersion is the full version string, including the prerelease tag.
+	// This is dynamically generated based on the Version and Tag variables.
+	FullVersion = func() string {
+		s := Version
+		if Tag != "" {
+			s += "-" + Tag
+		}
+		return s
+	}()
+)