feat(sdk): render version templates

Co-Authored-By: Virgil <virgil@lethean.io>

pkg/sdk/sdk.go

@@ -86,7 +86,7 @@ func New(projectDir string, config *Config) *SDK {
 // s.SetVersion("v1.2.3")
 func (s *SDK) SetVersion(version string) {
 	s.version = version
-	if s.config != nil {
+	if s.config != nil && !containsVersionTemplate(s.config.Package.Version) {
 		s.config.Package.Version = version
 	}
 }
@@ -148,7 +148,7 @@ func (s *SDK) GenerateLanguage(ctx context.Context, lang string) error {
 		SpecPath:    specPath,
 		OutputDir:   outputDir,
 		PackageName: s.config.Package.Name,
-		Version:     s.config.Package.Version,
+		Version:     s.resolvePackageVersion(),
 	}
 
 	core.Print(nil, "Generating %s SDK...", lang)
@@ -159,3 +159,36 @@ func (s *SDK) GenerateLanguage(ctx context.Context, lang string) error {
 
 	return nil
 }
+
+// resolvePackageVersion renders the configured package version against the
+// current SDK version when a template placeholder is present.
+//
+// resolved := s.resolvePackageVersion() // "v1.2.3" or "1.2.3-beta"
+func (s *SDK) resolvePackageVersion() string {
+	if s == nil || s.config == nil {
+		return ""
+	}
+
+	packageVersion := s.config.Package.Version
+	if packageVersion == "" {
+		return s.version
+	}
+
+	if !containsVersionTemplate(packageVersion) {
+		return packageVersion
+	}
+
+	if s.version == "" {
+		return packageVersion
+	}
+
+	resolved := core.Replace(packageVersion, "{{.Version}}", s.version)
+	resolved = core.Replace(resolved, "{{Version}}", s.version)
+	return resolved
+}
+
+// containsVersionTemplate reports whether a package version uses a version
+// placeholder that should be rendered at generation time.
+func containsVersionTemplate(value string) bool {
+	return core.Contains(value, "{{.Version}}") || core.Contains(value, "{{Version}}")
+}

pkg/sdk/sdk_test.go

@@ -31,6 +31,20 @@ func TestSDK_VersionPassedToGenerator_Good(t *testing.T) {
 	assert.Equal(t, "v2.0.0", s.config.Package.Version)
 }
 
+func TestSDK_VersionTemplateIsRendered_Good(t *testing.T) {
+	config := &Config{
+		Package: PackageConfig{
+			Name:    "test-sdk",
+			Version: "{{.Version}}-beta",
+		},
+	}
+	s := New("/tmp", config)
+	s.SetVersion("v2.0.0")
+
+	assert.Equal(t, "{{.Version}}-beta", s.config.Package.Version)
+	assert.Equal(t, "v2.0.0-beta", s.resolvePackageVersion())
+}
+
 func TestSDK_DefaultConfig_Good(t *testing.T) {
 	cfg := DefaultConfig()
 	assert.Contains(t, cfg.Languages, "typescript")