Patch and use jdk_version, jdk_path semantics

Patch and use jdk_version, jdk_path semantics
commit_hash:1e3c09f57ec484bba88fb8991fc5a00f6fd4df9b

build/export_generators/ide-gradle/jdk.jinja

@@ -0,0 +1,28 @@
+{%- set jdk_version = false -%}
+{%- if target.required_jdk -%}
+{%-     set jdk_version = target.required_jdk -%}
+{%- elif target.jdk_version -%}
+{%-     set jdk_version = target.jdk_version -%}
+{%- elif not target and extra_targets|length -%}
+{%-     set jdk_version_targets = extra_targets|selectattr('jdk_version') -%}
+{%-     if jdk_version_targets|length -%}
+{%-         set jdk_version_target = jdk_version_targets|first -%}
+{%-         set jdk_version = jdk_version_target.jdk_version -%}
+{%-     else -%}
+{%-         set jdk_version = '17' -%}
+{%-     endif -%}
+{%- else -%}
+{%-     set jdk_version = '17' -%}
+{%- endif -%}
+
+{%- set jdk_path = false -%}
+{%- if target.jdk_path and target.jdk_path != "NOT_FOUND" -%}
+{%-     set jdk_path = target.jdk_path -%}
+{#- If no main target, but exists extra_targets -#}
+{%- elif not target and extra_targets|length -%}
+{%-     set jdk_path_targets = extra_targets|selectattr('jdk_path')|rejectattr('jdk_path', 'eq', 'NOT_FOUND') -%}
+{%-     if jdk_path_targets|length -%}
+{%-         set jdk_path_target = jdk_path_targets|first -%}
+{%-         set jdk_path = jdk_path_target.jdk_path -%}
+{%-     endif -%}
+{%- endif -%}

build/export_generators/ide-gradle/kotlin_plugins.jinja

@@ -59,6 +59,6 @@ noArg {
 {%- if with_kotlin %}
 
 kotlin {
-    jvmToolchain({{ required_jdk }})
+    jvmToolchain({{ jdk_version }})
 }
 {%  endif -%}

build/export_generators/ide-gradle/plugins.jinja

@@ -35,12 +35,11 @@ plugins {
 {%- endif %}
 }
 
-{#- language level -#}
-{%- if has_required_jdk %}
+{%- if jdk_version %}
 
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of("{{ required_jdk }}")
+        languageVersion = JavaLanguageVersion.of("{{ jdk_version }}")
     }
 }
-{%- endif -%}
+{%  endif -%}

build/export_generators/ide-gradle/preview.jinja

@@ -3,7 +3,7 @@
 tasks.withType<JavaCompile> {
     options.compilerArgs.add("--enable-preview")
     options.compilerArgs.add("-Xlint:preview")
-    options.release.set({{ required_jdk }})
+    options.release.set({{ jdk_version }})
 }
 
 tasks.withType<JavaExec> {
@@ -17,7 +17,7 @@ tasks.withType<Test> {
 
 tasks.withType<Javadoc> {
     val javadocOptions = options as CoreJavadocOptions
-    javadocOptions.addStringOption("source", "{{ required_jdk }}")
+    javadocOptions.addStringOption("source", "{{ jdk_version }}")
     javadocOptions.addBooleanOption("-enable-preview", true)
 }
 {% endif -%}

build/export_generators/ide-gradle/proto_plugins.jinja

@@ -7,3 +7,12 @@ plugins {
     `signing`
 {%- endif %}
 }
+
+{%- if jdk_version %}
+
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of("{{ jdk_version }}")
+    }
+}
+{%- endif -%}

build/export_generators/ide-gradle/proto_vars.jinja

@@ -1,2 +1,4 @@
 {%- set publish = target.publish -%}
 {%- set libraries = target.consumer|selectattr('type', 'eq', 'library') -%}
+
+{%- include "[generator]/jdk.jinja" -%}

build/export_generators/ide-gradle/vars.jinja

@@ -5,11 +5,4 @@
 {%- set has_junit5_test = extra_targets|selectattr('junit5_test') -%}
 {%- set has_errorprone = target.use_errorprone and not disable_errorprone and target.consumer|selectattr('jar', 'startsWith', 'contrib/java/com/google/errorprone/error_prone_annotations')|length -%}
 
-{%- if not target.required_jdk -%}
-{%-     set has_required_jdk = false -%}
-{#-     If no required JDK, set default JDK for Kotlin parts -#}
-{%-     set required_jdk = '17' -%}
-{%- else -%}
-{%-     set has_required_jdk = true -%}
-{%-     set required_jdk = target.required_jdk -%}
-{%- endif -%}
+{%- include "[generator]/jdk.jinja" -%}