From 3f60e62ea86a3180b45290102d3519347cf8788a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lubom=C3=ADr=20Sedl=C3=A1=C5=99?= <lsedlar@redhat.com>
Date: Wed, 11 Apr 2018 09:18:59 +0200
Subject: [PATCH 1/3] Revert "Move ostree phase and pipelines for running
 phases"

This reverts commit 660c04368ba1abed310f121d01f0fa029eea5f11.
---
 bin/pungi-koji           |  52 +++++---
 doc/_static/phases.svg   | 339 ++++++++++++++++++++++-------------------------
 pungi/phases/__init__.py |  19 ++-
 pungi/phases/weaver.py   |  72 ----------
 tests/test_phase_base.py | 129 ++++--------------
 5 files changed, 230 insertions(+), 381 deletions(-)
 delete mode 100644 pungi/phases/weaver.py

diff --git a/bin/pungi-koji b/bin/pungi-koji
index 2a62a125..e5d31084 100755
--- a/bin/pungi-koji
+++ b/bin/pungi-koji
@@ -358,27 +358,41 @@ def run_compose(compose, create_latest_link=True, latest_link_status=None):
             # Store the password
             compose.conf["signing_key_password"] = signing_key_password
 
+    # INIT phase
     init_phase.start()
     init_phase.stop()
 
+    # PKGSET phase
     pkgset_phase.start()
     pkgset_phase.stop()
 
-    # WEAVER phase - launches other phases which can safely run in parallel
-    essentials_schema = (
-        buildinstall_phase,
-        (gather_phase, extrafiles_phase, createrepo_phase),
-        (ostree_phase, ostree_installer_phase),
-    )
-    essentials_phase = pungi.phases.WeaverPhase(compose, essentials_schema)
-    essentials_phase.start()
-    essentials_phase.stop()
+    # BUILDINSTALL phase - start, we can run gathering, extra files and
+    # createrepo while buildinstall is in progress.
+    buildinstall_phase.start()
+
+    # If any of the following three phases fail, we must ensure that
+    # buildinstall is stopped. Otherwise the whole process will hang.
+    try:
+        gather_phase.start()
+        gather_phase.stop()
+
+        extrafiles_phase.start()
+        extrafiles_phase.stop()
+
+        createrepo_phase.start()
+        createrepo_phase.stop()
+
+    finally:
+        buildinstall_phase.stop()
 
     if not buildinstall_phase.skip():
         buildinstall_phase.copy_files()
 
-    productimg_phase.start()
-    productimg_phase.stop()
+    ostree_phase.start()
+    ostree_phase.stop()
+
+    pungi.phases.run_all([productimg_phase,
+                          ostree_installer_phase])
 
     # write treeinfo before ISOs are created
     for variant in compose.get_variants():
@@ -394,16 +408,11 @@ def run_compose(compose, create_latest_link=True, latest_link_status=None):
             pungi.metadata.write_media_repo(compose, arch, variant, timestamp)
 
     # Start all phases for image artifacts
-    compose_images_schema = (
-        createiso_phase,
-        liveimages_phase,
-        image_build_phase,
-        livemedia_phase,
-        osbs_phase,
-    )
-    compose_images_phase = pungi.phases.WeaverPhase(compose, compose_images_schema)
-    compose_images_phase.start()
-    compose_images_phase.stop()
+    pungi.phases.run_all([createiso_phase,
+                          liveimages_phase,
+                          image_build_phase,
+                          livemedia_phase,
+                          osbs_phase])
 
     image_checksum_phase.start()
     image_checksum_phase.stop()
@@ -412,6 +421,7 @@ def run_compose(compose, create_latest_link=True, latest_link_status=None):
     compose.im.dump(compose.paths.compose.metadata("images.json"))
     osbs_phase.dump_metadata()
 
+    # TEST phase
     test_phase.start()
     test_phase.stop()
 
diff --git a/doc/_static/phases.svg b/doc/_static/phases.svg
index 66184b15..072e5dd2 100644
--- a/doc/_static/phases.svg
+++ b/doc/_static/phases.svg
@@ -14,7 +14,7 @@
    viewBox="0 0 839.33334 220.33335"
    id="svg2"
    version="1.1"
-   inkscape:version="0.91 r13725"
+   inkscape:version="0.92+devel unknown"
    sodipodi:docname="phases.svg"
    inkscape:export-filename="/home/lsedlar/repos/pungi/doc/_static/phases.png"
    inkscape:export-xdpi="90"
@@ -26,16 +26,16 @@
      borderopacity="1.0"
      inkscape:pageopacity="1"
      inkscape:pageshadow="2"
-     inkscape:zoom="1.6532468"
-     inkscape:cx="337.4932"
-     inkscape:cy="70.825454"
+     inkscape:zoom="0.8266234"
+     inkscape:cx="226.63066"
+     inkscape:cy="201.60264"
      inkscape:document-units="px"
      inkscape:current-layer="layer1"
      showgrid="false"
      inkscape:window-width="1920"
-     inkscape:window-height="1020"
-     inkscape:window-x="1920"
-     inkscape:window-y="31"
+     inkscape:window-height="1016"
+     inkscape:window-x="0"
+     inkscape:window-y="27"
      inkscape:window-maximized="1"
      units="px"
      inkscape:document-rotation="0"
@@ -67,7 +67,7 @@
         <dc:format>image/svg+xml</dc:format>
         <dc:type
            rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-        <dc:title />
+        <dc:title></dc:title>
       </cc:Work>
     </rdf:RDF>
   </metadata>
@@ -100,7 +100,87 @@
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     </g>
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-             style="font-size:13.14787769px;line-height:1.25"
-             id="tspan3406"
-             sodipodi:role="line"
-             x="256.90588"
-             y="840.3219">OSTree</tspan></text>
-      </g>
-      <g
-         transform="translate(-328.39105,-85.517823)"
-         id="g288">
-        <g
-           transform="translate(0.56706579,0)"
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-             width="26.295755"
-             height="101.85102"
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-             y="490.33765"
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-             sodipodi:linespacing="0%"
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-               id="tspan283"
-               sodipodi:role="line"
-               x="492.642"
-               y="1039.4121">OSTreeInstaller</tspan></text>
-        </g>
+             x="492.642"
+             sodipodi:role="line"
+             id="tspan283">OSTreeInstaller</tspan></text>
       </g>
     </g>
     <g
        id="g236"
-       transform="translate(-60.108974,42.1407)">
+       transform="translate(0,42.1407)">
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          transform="translate(88.832932,-122.61379)"
          id="g3458">
@@ -367,8 +343,7 @@
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            x="422.99252"
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-           xml:space="preserve"
-           sodipodi:linespacing="0%"><tspan
+           xml:space="preserve"><tspan
              y="971.54041"
              x="422.99252"
              id="tspan3386"
@@ -391,8 +366,7 @@
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            x="422.69772"
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-           sodipodi:linespacing="0%"><tspan
+           xml:space="preserve"><tspan
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            x="422.69772"
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-           sodipodi:linespacing="0%"><tspan
+           xml:space="preserve"><tspan
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              x="422.69772"
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            y="1079.6111"
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+           id="text3424"><tspan
              id="tspan3434"
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+           style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:11.99999714px;line-height:0%;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
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            y="1065.7078"
-           id="text294"
-           sodipodi:linespacing="0%"><tspan
+           id="text294"><tspan
              y="1065.7078"
              x="492.642"
              sodipodi:role="line"
diff --git a/pungi/phases/__init__.py b/pungi/phases/__init__.py
index 90765be5..044aa467 100644
--- a/pungi/phases/__init__.py
+++ b/pungi/phases/__init__.py
@@ -16,7 +16,6 @@
 
 # phases in runtime order
 from .init import InitPhase  # noqa
-from .weaver import WeaverPhase  # noqa
 from .pkgset import PkgsetPhase  # noqa
 from .gather import GatherPhase  # noqa
 from .createrepo import CreaterepoPhase  # noqa
@@ -32,3 +31,21 @@ from .livemedia_phase import LiveMediaPhase  # noqa
 from .ostree import OSTreePhase  # noqa
 from .ostree_installer import OstreeInstallerPhase  # noqa
 from .osbs import OSBSPhase  # noqa
+
+
+def run_all(phases):
+    """Start and stop all given phases and make them run in parallel.
+
+    This function makes sure that even if one of the phases fails and raises an
+    exception, all the phases will still be correctly stopped.
+
+    If multiple phases fail, a exception from one of them will be raised, but
+    there are no guarantees which one it will be.
+    """
+    if not phases:
+        return
+    phases[0].start()
+    try:
+        run_all(phases[1:])
+    finally:
+        phases[0].stop()
diff --git a/pungi/phases/weaver.py b/pungi/phases/weaver.py
deleted file mode 100644
index e5dc6ca2..00000000
--- a/pungi/phases/weaver.py
+++ /dev/null
@@ -1,72 +0,0 @@
-# -*- coding: utf-8 -*-
-
-from kobo import shortcuts
-from kobo.threads import ThreadPool, WorkerThread
-
-
-class WeaverPhase(object):
-    """
-    Special "phase" that manages other phases' run.
-    It needs input-running schema where particular phases are composed
-    sequentially and in parallel as well. A Sequential set of phases
-    is named "pipeline".
-    If any of the phases fail, we must ensure that others will stop correctly.
-    Otherwise the whole process will hang.
-
-    :param compose: it is needed for logging
-    :param phases_schema: two-dimensional array of phases. Top dimension
-        denotes particular pipelines. Second dimension contains phases.
-    """
-    name = "weaver"
-
-    def __init__(self, compose, phases_schema):
-        self.msg = "---------- PHASE: %s ----------" % self.name.upper()
-        self.compose = compose
-        self.finished = False
-        self.pool = ThreadPool(logger=self.compose._logger)
-        if not phases_schema:
-            msg = "No running schema was set for WeaverPhase"
-            self.pool.log_error(msg)
-            raise ValueError(msg)
-        self._phases_schema = phases_schema
-
-    def start(self):
-        if self.finished:
-            msg = "Phase '%s' has already finished and can not be started twice" % self.name
-            self.pool.log_error(msg)
-            raise RuntimeError(msg)
-
-        self.compose.log_info("[BEGIN] %s" % self.msg)
-        self.run()
-
-    def run(self):
-        for pipeline in shortcuts.force_list(self._phases_schema):
-            self.pool.add(PipelineThread(self.pool))
-            self.pool.queue_put(shortcuts.force_list(pipeline))
-
-        self.pool.start()
-
-    def stop(self):
-        if self.finished:
-            return
-        if hasattr(self, "pool"):
-            self.pool.stop()
-        self.finished = True
-        self.compose.log_info("[DONE ] %s" % self.msg)
-
-
-class PipelineThread(WorkerThread):
-    """
-    Launches phases in pipeline sequentially
-    """
-    def process(self, item, num):
-        pipeline = shortcuts.force_list(item)
-        phases_names = ", ".join(phase.name for phase in pipeline)
-        msg = "Running pipeline (%d/%d). Phases: %s" % (num, self.pool.queue_total, phases_names)
-        self.pool.log_info("[BEGIN] %s" % (msg,))
-
-        for phase in pipeline:
-            phase.start()
-            phase.stop()
-
-        self.pool.log_info("[DONE ] %s" % (msg,))
diff --git a/tests/test_phase_base.py b/tests/test_phase_base.py
index ba80afe3..a8b9469a 100644
--- a/tests/test_phase_base.py
+++ b/tests/test_phase_base.py
@@ -7,13 +7,11 @@ try:
 except ImportError:
     import unittest
 import os
-import random
 import sys
-import time
 
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
 
-from pungi.phases import base, weaver
+from pungi.phases import run_all, base
 from tests.helpers import DummyCompose, PungiTestCase, boom
 
 
@@ -74,124 +72,49 @@ class ImageConfigMixinTestCase(PungiTestCase):
         self.assertEqual(resolve_git_url.num, 3, 'Resolver was not called three times')
 
 
-class TestWeaver(unittest.TestCase):
-    def setUp(self):
-        # prepare 6 phase mock-objects.
-        for test_phase_number in range(1, 7):
-            # This is equvalent to:
-            # self.pX = mock.Mock()
-            # self.pX.name = "phase X"
-            # self.pX.start = default_method
-            test_phase_name = "p" + repr(test_phase_number)
-            tmp = mock.Mock()
-            tmp.name = "phase %d" % test_phase_number
-            tmp.start.side_effect = self.method_regular
-            setattr(self, test_phase_name, tmp)
-
-        self.compose = DummyCompose(None, {})
-
-    def method_regular(self):
-        """
-        It only have to cause some delay (tens of miliseconds).
-        Delay is needed for threads that has enough time to start.
-        """
-        multiplier = random.sample(range(1, 10), 1)
-        time.sleep(multiplier[0] * 0.01)
-
-    def method_with_exception(self):
-        self.method_regular()  # make some delay
-        boom()  # throw exception
-
+class TestRunAll(unittest.TestCase):
     def assertFinalized(self, p):
         self.assertEqual(p.mock_calls, [mock.call.start(), mock.call.stop()])
 
-    def assertInterrupted(self, p):
-        self.assertEqual(p.mock_calls, [mock.call.start()])
-
-    def assertMissed(self, p):
-        self.assertEqual(p.mock_calls, [])
-
-    def test_parallel(self):
-        phases_schema = (self.p1, self.p2)
-        weaver_phase = weaver.WeaverPhase(self.compose, phases_schema)
-        weaver_phase.start()
-        weaver_phase.stop()
-
-        self.assertFinalized(self.p1)
-        self.assertFinalized(self.p2)
-
-    def test_pipeline(self):
-        phases_schema = ((self.p1, self.p2),)
-        weaver_phase = weaver.WeaverPhase(self.compose, phases_schema)
-        weaver_phase.start()
-        weaver_phase.stop()
+    def test_calls_stop(self):
+        p1 = mock.Mock()
+        p2 = mock.Mock()
 
-        self.assertFinalized(self.p1)
-        self.assertFinalized(self.p2)
+        run_all([p1, p2])
 
-    def test_stop_on_failure(self):
-        self.p2.start.side_effect = self.method_with_exception
+        self.assertFinalized(p1)
+        self.assertFinalized(p2)
 
-        phases_schema = ((self.p1, self.p2, self.p3),)  # one pipeline
-        weaver_phase = weaver.WeaverPhase(self.compose, phases_schema)
-        with self.assertRaises(Exception) as ctx:
-            weaver_phase.start()
-            weaver_phase.stop()
-
-        self.assertEqual('BOOM', str(ctx.exception))
-        self.assertFinalized(self.p1)
-        self.assertInterrupted(self.p2)
-        self.assertMissed(self.p3)
+    def test_calls_stop_on_failure(self):
+        p1 = mock.Mock()
+        p2 = mock.Mock()
+        p3 = mock.Mock()
 
-    def test_parallel_stop_on_failure(self):
-        self.p2.start.side_effect = self.method_with_exception
+        p2.stop.side_effect = boom
 
-        phases_schema = (self.p1, self.p2, self.p3)  # one pipeline
-        weaver_phase = weaver.WeaverPhase(self.compose, phases_schema)
         with self.assertRaises(Exception) as ctx:
-            weaver_phase.start()
-            weaver_phase.stop()
+            run_all([p1, p2, p3])
 
         self.assertEqual('BOOM', str(ctx.exception))
-        self.assertFinalized(self.p1)
-        self.assertInterrupted(self.p2)
-        self.assertFinalized(self.p3)
+        self.assertFinalized(p1)
+        self.assertFinalized(p2)
+        self.assertFinalized(p3)
 
     def test_multiple_fail(self):
-        self.p2.start.side_effect = self.method_with_exception
-        self.p3.start.side_effect = self.method_with_exception
+        p1 = mock.Mock(name='p1')
+        p2 = mock.Mock(name='p2')
+        p3 = mock.Mock(name='p3')
 
-        phases_schema = ((self.p1, self.p2, self.p3),)  # one pipeline
-        weaver_phase = weaver.WeaverPhase(self.compose, phases_schema)
-        with self.assertRaises(Exception) as ctx:
-            weaver_phase.start()
-            weaver_phase.stop()
+        p2.stop.side_effect = boom
+        p3.stop.side_effect = boom
 
-        self.assertEqual('BOOM', str(ctx.exception))
-        self.assertFinalized(self.p1)
-        self.assertInterrupted(self.p2)
-        self.assertMissed(self.p3)
-
-    def test_multi_pipeline(self):
-        self.p2.start.side_effect = self.method_with_exception
-        phases_schema = (
-            self.p1,
-            (self.p2, self.p3, self.p4),
-            (self.p5, self.p6),
-        )
-
-        weaver_phase = weaver.WeaverPhase(self.compose, phases_schema)
         with self.assertRaises(Exception) as ctx:
-            weaver_phase.start()
-            weaver_phase.stop()
+            run_all([p1, p2, p3])
 
         self.assertEqual('BOOM', str(ctx.exception))
-        self.assertFinalized(self.p1)
-        self.assertInterrupted(self.p2)
-        self.assertMissed(self.p3)
-        self.assertMissed(self.p4)
-        self.assertFinalized(self.p5)
-        self.assertFinalized(self.p6)
+        self.assertFinalized(p1)
+        self.assertFinalized(p2)
+        self.assertFinalized(p3)
 
 
 if __name__ == "__main__":
-- 
2.13.6