fix(bazel): Accept module statements without version

The Bazel module specification ([1]) allows `module` statements without a
version. This commit modifies ORT's module files parser to allow missing
versions and to use the project VCS revision when there is no version
defined.

[1]: https://bazel.build/rules/lib/globals/module#module

Signed-off-by: Nicolas Nobelis <nicolas.nobelis@bosch.com>

Author: nnobelis

plugins/package-managers/bazel/src/funTest/assets/projects/synthetic/bazel-7.0-no-version-expected-output.yml

@@ -1,6 +1,6 @@
 ---
 project:
-  id: "Bazel::my_bazel_module:1.0.0"
+  id: "Bazel::my_bazel_module:<REPLACE_REVISION>"
   definition_file_path: "<REPLACE_DEFINITION_FILE_PATH>"
   declared_licenses: []
   declared_licenses_processed: {}

plugins/package-managers/bazel/src/funTest/assets/projects/synthetic/bazel-7.0_modules_without_versions/MODULE.bazel

@@ -1,4 +1,4 @@
-module(name = "my_bazel_module", version = "1.0.0")
+module(name = "my_bazel_module")
 
 bazel_dep(name = "nanopb", dev_dependency=True)
 

plugins/package-managers/bazel/src/funTest/kotlin/BazelFunTest.kt

@@ -81,7 +81,7 @@ class BazelFunTest : StringSpec({
         result.toYaml() should matchExpectedResult(expectedResultFile, definitionFile)
     }
 
-    "Dependencies are detected correctly with Bazel when a dependency has no version" {
+    "Dependencies are detected correctly with Bazel when a module or a dependency has no version" {
         val definitionFile = getAssetFile("projects/synthetic/bazel-7.0_modules_without_versions/MODULE.bazel")
         val expectedResultFile = getAssetFile("projects/synthetic/bazel-7.0-no-version-expected-output.yml")
 

plugins/package-managers/bazel/src/main/kotlin/Bazel.kt

@@ -257,7 +257,7 @@ class Bazel(
                         type = projectType,
                         namespace = "",
                         name = moduleMetadata.module?.name ?: VersionControlSystem.getPathInfo(definitionFile).path,
-                        version = moduleMetadata.module?.version.orEmpty()
+                        version = moduleMetadata.module?.version?.ifEmpty { projectVcs.revision }.orEmpty()
                     ),
                     definitionFilePath = VersionControlSystem.getPathInfo(definitionFile).path,
                     declaredLicenses = emptySet(),

plugins/package-managers/bazel/src/main/kotlin/StarlarkParser.kt

@@ -247,7 +247,7 @@ internal class Parser(input: String) {
 
         return ModuleDirective(
             name = params["name"] ?: throw IllegalArgumentException("Missing name in 'module' directive"),
-            version = params["version"] ?: throw IllegalArgumentException("Missing version in 'module' directive"),
+            version = params["version"].orEmpty(),
             compatibilityLevel = params["compatibility_level"]?.toInt() ?: 0
         )
     }