chore: added extra variables owlbot kokoro configs (#822)

Author: daniel-sanche

.kokoro/common.cfg

@@ -11,3 +11,23 @@ env_vars: {
   key: "TRAMPOLINE_BUILD_FILE"
   value: "github/java-logging-logback/.kokoro/build.sh"
 }
+
+
+#############################################
+# this section merged from .kokoro/common_env_vars.cfg using owlbot.py
+
+env_vars: {
+    key: "PRODUCT_AREA_LABEL"
+    value: "observability"
+}
+env_vars: {
+    key: "PRODUCT_LABEL"
+    value: "logging"
+}
+env_vars: {
+    key: "LANGUAGE_LABEL"
+    value: "java"
+}
+
+###################################################
+

.kokoro/common_env_vars.cfg

@@ -0,0 +1,19 @@
+
+#############################################
+# this section merged from .kokoro/common_env_vars.cfg using owlbot.py
+
+env_vars: {
+    key: "PRODUCT_AREA_LABEL"
+    value: "observability"
+}
+env_vars: {
+    key: "PRODUCT_LABEL"
+    value: "logging"
+}
+env_vars: {
+    key: "LANGUAGE_LABEL"
+    value: "java"
+}
+
+###################################################
+

.kokoro/continuous/common.cfg

@@ -23,3 +23,23 @@ env_vars: {
   key: "JOB_TYPE"
   value: "test"
 }
+
+
+#############################################
+# this section merged from .kokoro/common_env_vars.cfg using owlbot.py
+
+env_vars: {
+    key: "PRODUCT_AREA_LABEL"
+    value: "observability"
+}
+env_vars: {
+    key: "PRODUCT_LABEL"
+    value: "logging"
+}
+env_vars: {
+    key: "LANGUAGE_LABEL"
+    value: "java"
+}
+
+###################################################
+

.kokoro/nightly/common.cfg

@@ -23,3 +23,23 @@ env_vars: {
   key: "JOB_TYPE"
   value: "test"
 }
+
+
+#############################################
+# this section merged from .kokoro/common_env_vars.cfg using owlbot.py
+
+env_vars: {
+    key: "PRODUCT_AREA_LABEL"
+    value: "observability"
+}
+env_vars: {
+    key: "PRODUCT_LABEL"
+    value: "logging"
+}
+env_vars: {
+    key: "LANGUAGE_LABEL"
+    value: "java"
+}
+
+###################################################
+

.kokoro/presubmit/common.cfg

@@ -32,3 +32,23 @@ before_action {
     }
   }
 }
+
+
+#############################################
+# this section merged from .kokoro/common_env_vars.cfg using owlbot.py
+
+env_vars: {
+    key: "PRODUCT_AREA_LABEL"
+    value: "observability"
+}
+env_vars: {
+    key: "PRODUCT_LABEL"
+    value: "logging"
+}
+env_vars: {
+    key: "LANGUAGE_LABEL"
+    value: "java"
+}
+
+###################################################
+

.kokoro/release/common.cfg

@@ -47,3 +47,23 @@ before_action {
     }
   }
 }
+
+
+#############################################
+# this section merged from .kokoro/common_env_vars.cfg using owlbot.py
+
+env_vars: {
+    key: "PRODUCT_AREA_LABEL"
+    value: "observability"
+}
+env_vars: {
+    key: "PRODUCT_LABEL"
+    value: "logging"
+}
+env_vars: {
+    key: "LANGUAGE_LABEL"
+    value: "java"
+}
+
+###################################################
+

owlbot.py

@@ -14,7 +14,9 @@
 
 """This script is used to synthesize generated parts of this library."""
 
+import os
 import synthtool.languages.java as java
+import synthtool as s
 
 java.common_templates(excludes=[
     '.gitignore',
@@ -23,3 +25,25 @@
     'CONTRIBUTING.md',
     '.github/auto-label.yaml',
 ])
+
+# --------------------------------------------------------------------------
+# Modify test configs
+# --------------------------------------------------------------------------
+
+# add shared environment variables to test configs
+s.move(
+    ".kokoro/common_env_vars.cfg",
+    ".kokoro/common.cfg",
+    merge=lambda src, dst, _, : f"{dst}\n{src}",
+)
+tracked_subdirs = ["continuous", "presubmit", "release", "nightly"]
+for subdir in tracked_subdirs:
+    for path, subdirs, files in os.walk(f".kokoro/{subdir}"):
+        for name in files:
+            if name == "common.cfg":
+                file_path = os.path.join(path, name)
+                s.move(
+                    ".kokoro/common_env_vars.cfg",
+                    file_path,
+                    merge=lambda src, dst, _, : f"{dst}\n{src}",
+                )