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From 46335861073882b7162221fc0995dc1df3c67749 Mon Sep 17 00:00:00 2001
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From: Vojtech Trefny <vtrefny@redhat.com>
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Date: Fri, 6 Aug 2021 16:37:51 +0200
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Subject: [PATCH] Improve error message printed for missing dependecies
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The existing error message can be confusing for people that don't
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know internals of blivet and libblockdev and the information what
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is actually broken or not installed on the system is missing
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completely. Example for LVM VDO with missing kvdo module:
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Before:
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device type lvmvdopool requires unavailable_dependencies:
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libblockdev lvm plugin (vdo technology)
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After:
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device type lvmvdopool requires unavailable_dependencies:
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libblockdev lvm plugin (vdo technology):
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libblockdev plugin lvm is loaded but some required technologies
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are not available (BD_LVM_TECH_VDO: Kernel module 'kvdo' not
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available)
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---
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blivet/deviceaction.py | 2 +-
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blivet/tasks/availability.py | 4 ++--
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2 files changed, 3 insertions(+), 3 deletions(-)
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diff --git a/blivet/deviceaction.py b/blivet/deviceaction.py
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index 56e29215..0458e4be 100644
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--- a/blivet/deviceaction.py
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+++ b/blivet/deviceaction.py
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@@ -173,7 +173,7 @@ class DeviceAction(util.ObjectID):
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def _check_device_dependencies(self):
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unavailable_dependencies = self.device.unavailable_dependencies
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if unavailable_dependencies:
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- dependencies_str = ", ".join(str(d) for d in unavailable_dependencies)
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+ dependencies_str = ", ".join("%s:\n%s" % (str(d), ", ".join(d.availability_errors)) for d in unavailable_dependencies)
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raise DependencyError("device type %s requires unavailable_dependencies: %s" % (self.device.type, dependencies_str))
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def apply(self):
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diff --git a/blivet/tasks/availability.py b/blivet/tasks/availability.py
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index 1fd80590..1537f3f5 100644
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--- a/blivet/tasks/availability.py
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+++ b/blivet/tasks/availability.py
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@@ -224,7 +224,7 @@ class BlockDevMethod(Method):
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try:
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self._tech_info.check_fn(tech, mode)
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except GLib.GError as e:
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- errors.append(str(e))
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+ errors.append("%s: %s" % (tech.value_name, e.message))
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return errors
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def availability_errors(self, resource):
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@@ -242,7 +242,7 @@ class BlockDevMethod(Method):
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tech_missing = self._check_technologies()
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if tech_missing:
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return ["libblockdev plugin %s is loaded but some required "
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- "technologies are not available:\n%s" % (self._tech_info.plugin_name, tech_missing)]
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+ "technologies are not available (%s)" % (self._tech_info.plugin_name, "; ".join(tech_missing))]
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else:
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return []
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--
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2.31.1
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