Update fetch-subunit-output to look for nox envs

Some projects are converting from tox to nox for driving tests. This
means there isn't a tox env to find testr/stestr in. Update
fetch-subunit-output to look for nox envs as well.

Change-Id: I051c4b27d22921f1f0c3a44dc4eaccdbb50afa29

roles/fetch-subunit-output/files/find-subunit2html.sh

@@ -36,6 +36,15 @@ if [[ -d .tox ]] ; then
     done
 fi
 
+# Add all the nox envs to the path so that type will work. Prefer nox
+# envs to tox and system path. If there is more than one nox env, it doesn't
+# matter which one we use, PATH will find the first command.
+if [[ -d .nox ]] ; then
+    for nox_bindir in $(find .nox -mindepth 2 -maxdepth 2 -name 'bin') ; do
+        PATH=$(pwd)/$nox_bindir:$PATH
+    done
+fi
+
 # NOTE(mordred): Fallback default to /usr/os-testr-env/bin/subunit2html
 # to provide a fallback case for OpenStack while we make sure this
 # logic works. Once we're satisfied that nobody is using

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

@@ -61,6 +61,15 @@ if [[ -d .tox ]] ; then
     done
 fi
 
+# Add all the nox envs to the path so that type will work. Prefer nox
+# envs to tox and system path. If there is more than one nox env, it doesn't
+# matter which one we use, PATH will find the first command.
+if [[ -d .nox ]] ; then
+    for nox_bindir in $(find .nox -mindepth 2 -maxdepth 2 -name 'bin') ; do
+        PATH=$(pwd)/$nox_bindir:$PATH
+    done
+fi
+
 for command in $commands; do
     # Use -P instead of -p because we always want a path here even if
     # there is an alias or builtin. We also filter blank lines as we
@@ -72,4 +81,5 @@ for command in $commands; do
         break
     fi
 done
+
 exit $rc

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

@@ -1,6 +1,6 @@
 # We're not using with_first_found because the files are remote, not local.
 # We want to use stestr if it exists or fallback to testr - and we want to
-# prefer files found in tox envs.
+# prefer files found in nox and tox envs.
 - name: Find stestr or testr executable
   script: "find-testr.sh {{ zuul_work_dir }}"
   register: testr_command

test-playbooks/python/fetch-subunit-output.yaml

@@ -15,6 +15,9 @@
         dest: "{{ zuul.project.src_dir }}/{{ item.dest }}"
       with_items:
         - content: |
+            [tox]
+            envlist = venv
+
             [testenv]
             sitepackages = True
             usedevelop = True

test-playbooks/python/fetch-tox-output.yaml

@@ -10,6 +10,9 @@
         dest: "{{ zuul.project.src_dir }}/{{ item.dest }}"
       with_items:
         - content: |
+            [tox]
+            envlist = venv
+
             [testenv]
             sitepackages = True
             usedevelop = True