Move Python code into a dedicated module

Resolves #2

action.yml

@@ -40,94 +40,17 @@ runs:
   steps:
   - name: Decide whether the input jobs succeeded or failed
     id: outcome
+    env:
+      PYTHONPATH: ${{ github.action_path }}/src
     run: |
-      import json
-      import sys
-
-      allowed_failures_raw_input = """${{ inputs.allowed-failures }}"""
-      try:
-          allowed_failures_input = json.loads(allowed_failures_raw_input)
-      except json.decoder.JSONDecodeError:
-          allowed_failures_input = list(
-              map(str.strip, allowed_failures_raw_input.split(',')),
-          )
-
-      inputs = {
-          'allowed_failures': allowed_failures_input,
-          'jobs': json.loads("""${{ inputs.jobs }}"""),
-      }
-
-      jobs = inputs['jobs'] or {}
-      jobs_allowed_to_fail = inputs['allowed_failures'] or []
-
-      if not jobs:
-          sys.exit(
-              '❌ Invalid input jobs matrix, '
-              'please provide a non-empty `needs` context',
-          )
-
-      job_matrix_succeeded = all(
-          job['result'] == 'success' for name, job in jobs.items()
-          if name not in jobs_allowed_to_fail
-      )
-
-      print(
-          '::set-output name=failure::{failed}'.
-          format(failed=not job_matrix_succeeded),
-          file=sys.stderr,
-      )
-      print(
-          '::set-output name=result::{result}'.
-          format(result='success' if job_matrix_succeeded else 'failure'),
-          file=sys.stderr,
-      )
-      print(
-          '::set-output name=success::{succeeded}'.
-          format(succeeded=job_matrix_succeeded),
-          file=sys.stderr,
-      )
-
-      allowed_to_fail_jobs_succeeded = all(
-          job['result'] == 'success' for name, job in jobs.items()
-          if name in jobs_allowed_to_fail
-      )
-
-      if job_matrix_succeeded:
-          print(
-              '🎉 All of the required dependency jobs succeeded.',
-              file=sys.stderr,
-          )
-      else:
-          print(
-              '😢 Some of the required to succeed jobs failed.',
-              file=sys.stderr,
-          )
-
-      if jobs_allowed_to_fail and allowed_to_fail_jobs_succeeded:
-          print(
-              '🛈 All of the allowed to fail dependency jobs succeeded.',
-              file=sys.stderr,
-          )
-      elif jobs_allowed_to_fail:
-          print(
-              '🛈 Some of the allowed to fail jobs did not succeed.',
-              file=sys.stderr,
-          )
-
-      print('📝 Job statuses:', file=sys.stderr)
-      for name, job in jobs.items():
-          print(
-              '📝 {name} → {emoji} {result} [{status}]'.
-              format(
-                  emoji='✓' if job['result'] == 'success' else '❌',
-                  name=name,
-                  result=job['result'],
-                  status='allowed to fail' if name in jobs_allowed_to_fail
-                  else 'required to succeed',
-              ),
-              file=sys.stderr,
-          )
-
-      sys.exit(int(not job_matrix_succeeded))
-    shell: python
+      python -m normalize_needed_jobs_status \
+      "$(cat << EOM
+        ${{ inputs.allowed-failures }}
+      EOM
+      )" \
+      "$(cat << EOM
+        ${{ inputs.jobs }}
+      EOM
+      )"
+    shell: bash
 ...

src/normalize_needed_jobs_status.py

@@ -0,0 +1,100 @@
+#! /usr/bin/env python
+
+import json
+import sys
+
+
+allowed_failures_raw_input = sys.argv[1]
+try:
+    allowed_failures_input = json.loads(allowed_failures_raw_input)
+except json.decoder.JSONDecodeError:
+    allowed_failures_input = list(
+        map(str.strip, allowed_failures_raw_input.split(',')),
+    )
+
+
+inputs = {
+    'allowed_failures': allowed_failures_input,
+    'jobs': json.loads(sys.argv[2]),
+}
+
+
+jobs = inputs['jobs'] or {}
+jobs_allowed_to_fail = inputs['allowed_failures'] or []
+
+if not jobs:
+    sys.exit(
+        '❌ Invalid input jobs matrix, '
+        'please provide a non-empty `needs` context',
+    )
+
+
+job_matrix_succeeded = all(
+    job['result'] == 'success' for name, job in jobs.items()
+    if name not in jobs_allowed_to_fail
+)
+
+
+print(
+    '::set-output name=failure::{failed}'.
+    format(failed=not job_matrix_succeeded),
+    file=sys.stderr,
+)
+print(
+    '::set-output name=result::{result}'.
+    format(result='success' if job_matrix_succeeded else 'failure'),
+    file=sys.stderr,
+)
+print(
+    '::set-output name=success::{succeeded}'.
+    format(succeeded=job_matrix_succeeded),
+    file=sys.stderr,
+)
+
+
+allowed_to_fail_jobs_succeeded = all(
+    job['result'] == 'success' for name, job in jobs.items()
+    if name in jobs_allowed_to_fail
+)
+
+
+if job_matrix_succeeded:
+    print(
+        '🎉 All of the required dependency jobs succeeded.',
+        file=sys.stderr,
+    )
+else:
+    print(
+        '😢 Some of the required to succeed jobs failed.',
+        file=sys.stderr,
+    )
+
+
+if jobs_allowed_to_fail and allowed_to_fail_jobs_succeeded:
+    print(
+        '🛈 All of the allowed to fail dependency jobs succeeded.',
+        file=sys.stderr,
+    )
+elif jobs_allowed_to_fail:
+    print(
+        '🛈 Some of the allowed to fail jobs did not succeed.',
+        file=sys.stderr,
+    )
+
+
+print('📝 Job statuses:', file=sys.stderr)
+for name, job in jobs.items():
+    print(
+        '📝 {name} → {emoji} {result} [{status}]'.
+        format(
+            emoji='✓' if job['result'] == 'success' else '❌',
+            name=name,
+            result=job['result'],
+            status='allowed to fail' if name in jobs_allowed_to_fail
+            else 'required to succeed',
+        ),
+        file=sys.stderr,
+    )
+
+
+sys.exit(int(not job_matrix_succeeded))