Merge "Fix partial subunit stream logging"

roles/fetch-subunit-output/files/find-testr.sh

@@ -28,17 +28,28 @@ zuul_work_dir=$1
 cd $HOME
 cd $zuul_work_dir
 
+# A non zero exit code means we didn't find any stestr or testr database
+# content. Additionally if the database content is parseable we emit on
+# stdout the commands which can be used to retrieve that parsed content.
+# This distiction is necessary as we want to take different actions based
+# on whether or not the database content is parseable.
+rc=1
 commands=""
+
 if [[ -d .testrepository ]] ; then
+    rc=0
     commands="testr ${commands}"
 fi
 
-# NOTE(mordred) Check for the failing file in the .stestr directory
-# nstead of just the directory. A stestr run that fails due to python
-# parsing errors will leave a directory but with no test results, which
-# will result in an error in the subunit generation phase.
-if [[ -f .stestr/failing ]] ; then
-    commands="stestr ${commands}"
+if [[ -d .stestr ]] ; then
+    rc=0
+    # NOTE(mordred) Check for the failing file in the .stestr directory
+    # instead of just the directory. A stestr run that fails due to python
+    # parsing errors will leave a directory but with no test results, which
+    # will result in an error in the subunit generation phase.
+    if [[ -f .stestr/failing ]] ; then
+        commands="stestr ${commands}"
+    fi
 fi
 
 # Add all the tox envs to the path so that type will work. Prefer tox
@@ -57,3 +68,4 @@ for command in $commands; do
         break
     fi
 done
+exit $rc

roles/fetch-subunit-output/tasks/main.yaml

@@ -4,15 +4,49 @@
 - name: Find stestr or testr executable
   script: "find-testr.sh {{ zuul_work_dir }}"
   register: testr_command
+  failed_when: false
 
 - when:
     - testr_command.rc == 0
-    - testr_command.stdout_lines
+  # Here we run steps that should apply whether or not there is a valid
+  # subunit stream present.
   block:
     - name: Get the list of directories with subunit files
       set_fact:
         all_subunit_dirs: "{{ [ zuul_work_dir ] + fetch_subunit_output_additional_dirs }}"
 
+    # If (s)testr was stopped early (possibly due to a timeout) it will "leak"
+    # a tmp file of the inflight subunit stream. Collect this as it is useful
+    # for debugging in these situations. Because it isn't a complete file
+    # we don't process it further.
+    - name: Find any inflight partial subunit files
+      find:
+        paths:
+          - "{{ zj_item }}/.testrepository"
+          - "{{ zj_item }}/.stestr"
+        patterns:
+          - 'tmp*'
+      register: partial_subunit_files
+      loop: "{{ all_subunit_dirs }}"
+      loop_control:
+        loop_var: zj_item
+
+    - name: Copy any inflight subunit files
+      copy:
+        dest: "{{ zuul_output_dir }}/logs/"
+        src: "{{ zj_item.path }}"
+        remote_src: true
+      with_items: "{{ partial_subunit_files.files }}"
+      loop_control:
+        loop_var: zj_item
+      when: partial_subunit_files.files is defined
+
+- when:
+    - testr_command.rc == 0
+    - testr_command.stdout_lines
+  # Here we run steps that only apply when there is a valid subunity stream.
+  # This is indicated through testr_command.stdout_lines content.
+  block:
     # The usage an independent target file instead of sending the output
     # to zuul_work_dir prevents issues related to zuul_work_dir being
     # a relative path, which may happen despite what the documentation
@@ -43,31 +77,5 @@
         state: absent
       failed_when: false
 
-    # If (s)testr was stopped early (possibly due to a timeout) it will "leak"
-    # a tmp file of the inflight subunit stream. Collect this as it is useful
-    # for debugging in these situations. Because it isn't a complete file
-    # we don't process it further.
-    - name: Find any inflight partial subunit files
-      find:
-        paths:
-          - "{{ zj_item }}/.testrepository"
-          - "{{ zj_item }}/.stestr"
-        patterns:
-          - 'tmp*'
-      register: partial_subunit_files
-      loop: "{{ all_subunit_dirs }}"
-      loop_control:
-        loop_var: zj_item
-
-    - name: Copy any inflight subunit files
-      copy:
-        dest: "{{ zuul_output_dir }}/logs/"
-        src: "{{ zj_item.path }}"
-        remote_src: true
-      with_items: "{{ partial_subunit_files.files }}"
-      loop_control:
-        loop_var: zj_item
-      when: partial_subunit_files.files is defined
-
     - name: Process and fetch subunit results
       include_tasks: process.yaml