Apply default dependencies when called from Pulumi CLI (#1501)

The `pulumi package gen-sdk` command calls `GeneratePackage` directly,
so we need to apply the defaults at that layer rather than in the
pulumi-java-gen specific code.

Fixes #1500

CHANGELOG.md

@@ -5,6 +5,8 @@ CHANGELOG
 
 - Reduce binary size by stripping debug information
 
+- Apply default dependencies consistently.
+
 ## 0.18.0 (2024-11-26)
 
 ### Improvements

pkg/cmd/pulumi-java-gen/command.go

@@ -147,8 +147,7 @@ See https://www.pulumi.com/docs/guides/pulumi-packages/schema/#language-specific
 			return err
 		}
 
-		opts.PackageInfo = opts.PackageInfo.With(buildArgOverrides).
-			WithDefaultDependencies()
+		opts.PackageInfo = opts.PackageInfo.With(buildArgOverrides)
 
 		if javaSdkVersionArg != "" {
 			parsedVersion, err := semver.ParseTolerant(javaSdkVersionArg)

pkg/codegen/java/gen.go

@@ -13,13 +13,17 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/blang/semver"
 	"github.com/pulumi/pulumi/pkg/v3/codegen"
 	"github.com/pulumi/pulumi/pkg/v3/codegen/schema"
 	"github.com/pulumi/pulumi/sdk/v3/go/common/util/contract"
 
 	"github.com/pulumi/pulumi-java/pkg/codegen/java/names"
 )
 
+// This should be bumped as required at the point of release.
+var DefaultSdkVersion = semver.Version{Major: 0, Minor: 18, Patch: 0}
+
 func packageName(packages map[string]string, name string) string {
 	if pkg, ok := packages[name]; ok {
 		return pkg
@@ -2039,6 +2043,9 @@ func generateModuleContextMap(tool string, pkg *schema.Package) (map[string]*mod
 					panic(fmt.Sprintf("Failed to cast `pkg.Language[\"java\"]`=%v to `PackageInfo`", raw))
 				}
 			}
+			javaInfo = javaInfo.
+				WithDefaultDependencies().
+				WithJavaSdkDependencyDefault(DefaultSdkVersion)
 			info = &javaInfo
 			infos[def] = info
 		}