Add options to use local DLRN and CentOS mirrors

Add the dlrn_baseurl option that allows overriding the DLRN server,
making possible to use a proxy upstream. Also add
dlrn_use_local_mirrors option. When true, the package building will
use the already defined CentOS and DLRN repos from the machine where
the packages are built.

Also move the rdoinfo repo fetching in the main part of the role to
save time and bandwidth.

Change-Id: I0b440895267fcd8027394504649372bd923128d6
Closes-bug: #1710678

roles/build-test-packages/README.md

@@ -32,6 +32,10 @@ Role Variables
   to skip projects that DLRN cannot build.
 * `artg_repos_dir` -- Root directory which contains project directories with
    sources for build.
+* `dlrn_baseurl` -- URL used by DLRN to get the repo definitions when building
+   packages
+* `dlrn_use_local_mirrors` -- use the local repo definitions from
+  /etc/yum.repos.d/ for CentOS and DLRN while building packages; used upstream
 
 ```yaml
 artg_change_list:

roles/build-test-packages/defaults/main.yml

@@ -6,6 +6,8 @@ artg_dlrn_repo_url: "https://github.com/openstack-packages/DLRN.git"
 artg_rdoinfo_repo_url: "https://github.com/redhat-openstack/rdoinfo"
 artg_compressed_gating_repo: "/home/stack/gating_repo.tar.gz"
 dlrn_cleanup: false
+dlrn_baseurl: "https://trunk.rdoproject.org/centos7-{{ artg_release }}"
+dlrn_use_local_mirrors: false
 
 artg_skipped_projects:
   - openstack/puppet-openstack-integration

roles/build-test-packages/tasks/dlrn-build.yml

@@ -12,24 +12,23 @@
     artg_distro: "{{ artg_release }}-rdo"
   when: artg_release not in ['master', 'mitaka']
 
+- name: Use local baseurl when using local mirrors
+  set_fact:
+    dlrn_baseurl: 'file:///tmp/fake-dlrn-repos'
+  when: dlrn_use_local_mirrors|bool
+
 - name: Override projects.ini settings
   lineinfile:
     dest: '{{ build_repo_dir }}/DLRN/projects.ini'
     regexp: '{{ project_item.regexp }}'
     line: '{{ project_item.line }}'
   with_items:
-    - { regexp: 'baseurl=.*', line: 'baseurl=https://trunk.rdoproject.org/centos7-{{ artg_release }}' }
+    - { regexp: 'baseurl=.*', line: 'baseurl={{ dlrn_baseurl }}' }
     - { regexp: 'distro=.*', line: 'distro={{ artg_distro }}' }
     - { regexp: 'source=.*', line: 'source={{ artg_change.branch }}' }
   loop_control:
       loop_var: project_item
 
-- name: Fetch local rdoinfo copy
-  git:
-    repo: '{{ artg_rdoinfo_repo_url }}'
-    dest: '{{ build_repo_dir }}/DLRN/rdoinfo'
-    version: 'master'
-
 - name: Map project name to DLRN project name
   register: project_name_mapped
   shell: >

roles/build-test-packages/tasks/main.yml

@@ -48,6 +48,31 @@
     version: master
   when: not dlrn_cloned.stat.exists
 
+- name: Fetch local rdoinfo copy
+  git:
+    repo: '{{ artg_rdoinfo_repo_url }}'
+    dest: '{{ build_repo_dir }}/DLRN/rdoinfo'
+    version: 'master'
+
+- name: Use local CentOS mirror if available
+  shell: >
+    gawk '{ print $0 }; /^# repos$/ { exit }' {{ build_repo_dir }}/DLRN/scripts/centos.cfg
+    > {{ build_repo_dir }}/DLRN/scripts/centos-local.cfg;
+    cat /etc/yum.repos.d/quickstart-centos-*.repo >> {{ build_repo_dir }}/DLRN/scripts/centos-local.cfg;
+    cat /etc/yum.repos.d/delorean*.repo >> {{ build_repo_dir }}/DLRN/scripts/centos-local.cfg;
+    echo '"""' >> {{ build_repo_dir }}/DLRN/scripts/centos-local.cfg;
+    mkdir -p /tmp/fake-dlrn-repos/current;
+    touch /tmp/fake-dlrn-repos/delorean-deps.repo;
+    touch /tmp/fake-dlrn-repos/current/delorean.repo;
+  when: dlrn_use_local_mirrors|bool
+
+- name: Use custom target for DLRN
+  lineinfile:
+    dest: '{{ build_repo_dir }}/DLRN/projects.ini'
+    regexp: 'target=.*'
+    line: 'target=centos-local'
+  when: dlrn_use_local_mirrors|bool
+
 #Remove the rpm install test to speed up delorean
 #TODO: add an option for this in delorean
 - name: Remove DLRN RPM install test