[stable-2.7] -Fix: The Ubuntu 14.04 image on Shippable runs an old version of python, causing issues with checking out bitbucket, adjust tests to compensate. (#49433)

-Add: Mention bitbucket dropping TLSv1 and TLSv1.1 support as per 01 Dec 2018, potentially causing issues with older clients.
(cherry picked from commit a6db7f7abd)

Co-authored-by: Xaroth <xaroth+github@xaroth.nl>

lib/ansible/modules/source_control/hg.py

@@ -70,6 +70,9 @@ notes:
       SSH will prompt user to authorize the first contact with a remote host.  To avoid this prompt,
       one solution is to add the remote host public key in C(/etc/ssh/ssh_known_hosts) before calling
       the hg module, with the following command: ssh-keyscan remote_host.com >> /etc/ssh/ssh_known_hosts."
+    - As per 01 Dec 2018, Bitbucket has dropped support for TLSv1 and TLSv1.1 connections. As such,
+      if the underlying system still uses a Python version below 2.7.9, you will have issues checking out
+      bitbucket repositories. See U(https://bitbucket.org/blog/deprecating-tlsv1-tlsv1-1-2018-12-01).
 '''
 
 EXAMPLES = '''

test/integration/targets/hg/tasks/main.yml

@@ -21,79 +21,32 @@
   register: has_hg
   ignore_errors: yes
 
-- name: install mercurial
-  include_tasks: install.yml
-  when: has_hg is failed
-
-- name: set where to extract the repo
-  set_fact: checkout_dir={{ output_dir }}/epdb
-
-- name: set what repo to use
-  set_fact: repo=https://bitbucket.org/rpathsync/epdb
-
-- name: clean out the output_dir
-  shell: rm -rf {{ output_dir }}/*
-
-- name: verify that mercurial is installed so this test can continue
-  shell: which hg
-
-- name: initial checkout
-  hg: repo={{ repo }} dest={{ checkout_dir }}
-  register: hg_result
-
-- debug: var=hg_result
-
-#- shell: ls ~/ansible_testing/epdb
-- shell: ls {{ checkout_dir }}
-
-- name: verify information about the initial clone
-  assert:
-    that:
-      - "'before' in hg_result"
-      - "'after' in hg_result"
-      - "not hg_result.before"
-      - "hg_result.changed"
-
-- name: repeated checkout
-  hg: repo={{ repo }} dest={{ checkout_dir }}
-  register: hg_result2
-
-- debug: var=hg_result2
-
-- name: check for tags
-  stat: path={{ checkout_dir }}/.hgtags
-  register: tags
-
-- name: check for remotes
-  stat: path={{ checkout_dir }}/.hg/branch
-  register: branches
-
-- debug: var=tags
-- debug: var=branches
-
-- name: assert presence of tags/trunk/branches
-  assert:
-    that:
-      - "tags.stat.isreg"
-      - "branches.stat.isreg"
-
-- name: verify on a reclone things are marked unchanged
-  assert:
-    that:
-      - "not hg_result2.changed"
-
-- name: Checkout non-existent repo clone
-  hg: repo=https://bitbucket.org/pyro46/pythonscript_1 clone=no update=no
-  register: hg_result3
-  ignore_errors: true
-
-- name: Verify result of non-existent repo clone
-  assert:
-    that:
-      - hg_result3.msg
-      - "'abort: HTTP Error 404: Not Found' in hg_result3.msg"
-      - "not hg_result3.changed"
-
-- name: uninstall mercurial
-  include_tasks: uninstall.yml
-  when: has_hg is failed
+- name: warn if the underlying system is not capable of running these tests
+  debug:
+    msg: >-
+      The mercurial client is not able to check out Bitbucket repositories as per the changes mentioned here:
+      https://bitbucket.org/blog/deprecating-tlsv1-tlsv1-1-2018-12-01 . Therefore these tests are skipped.
+  when: (ansible_distribution == "Ubuntu" and ansible_distribution_version == "14.04") or ansible_python_version is version("2.7.9", "<")
+
+- block:
+  - name: install mercurial
+    include_tasks: install.yml
+    when: has_hg is failed
+
+  - name: test mercurial
+    include_tasks: run-tests.yml
+
+  - name: uninstall mercurial
+    include_tasks: uninstall.yml
+    when: has_hg is failed
+
+  # As per the bitbucket changes in https://bitbucket.org/blog/deprecating-tlsv1-tlsv1-1-2018-12-01 , this
+  #  test will fail under certain circumstances, to avoid false positives, we skip these tests under the following
+  #  circumstances:
+  #
+  # - The ubuntu 14.04 image used on shippable runs python 2.7.6, so we skip explicitly for this image.
+  # - When ansible_python_version is not 2.7.9 or higher, mercurial is likely to also run using this same (old)
+  #   python version, which causes issues as per the link above.
+  when:
+  - not (ansible_distribution == "Ubuntu" and ansible_distribution_version == "14.04")
+  - ansible_python_version is version("2.7.9", ">=")

test/integration/targets/hg/tasks/run-tests.yml

@@ -0,0 +1,86 @@
+# test code for the hg module
+# (c) 2018, Ansible Project
+
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+
+- name: set where to extract the repo
+  set_fact: checkout_dir={{ output_dir }}/epdb
+
+- name: set what repo to use
+  set_fact: repo=https://bitbucket.org/rpathsync/epdb
+
+- name: clean out the output_dir
+  shell: rm -rf {{ output_dir }}/*
+
+- name: verify that mercurial is installed so this test can continue
+  shell: which hg
+
+- name: initial checkout
+  hg: repo={{ repo }} dest={{ checkout_dir }}
+  register: hg_result
+
+- debug: var=hg_result
+
+- shell: ls {{ checkout_dir }}
+
+- name: verify information about the initial clone
+  assert:
+    that:
+      - "'before' in hg_result"
+      - "'after' in hg_result"
+      - "not hg_result.before"
+      - "hg_result.changed"
+
+- name: repeated checkout
+  hg: repo={{ repo }} dest={{ checkout_dir }}
+  register: hg_result2
+
+- debug: var=hg_result2
+
+- name: check for tags
+  stat: path={{ checkout_dir }}/.hgtags
+  register: tags
+
+- name: check for remotes
+  stat: path={{ checkout_dir }}/.hg/branch
+  register: branches
+
+- debug: var=tags
+- debug: var=branches
+
+- name: assert presence of tags/trunk/branches
+  assert:
+    that:
+      - "tags.stat.isreg"
+      - "branches.stat.isreg"
+
+- name: verify on a reclone things are marked unchanged
+  assert:
+    that:
+      - "not hg_result2.changed"
+
+- name: Checkout non-existent repo clone
+  hg: repo=https://bitbucket.org/pyro46/pythonscript_1 clone=no update=no
+  register: hg_result3
+  ignore_errors: true
+
+- name: Verify result of non-existent repo clone
+  assert:
+    that:
+      - hg_result3.msg
+      - "'abort: HTTP Error 404: Not Found' in hg_result3.msg"
+      - "not hg_result3.changed"