Make the use of the repo index overrides optional

Currently the repo build process hard codes the use of a set of indexes
when building wheels. This overrides any existing pip configuration in
the repo container and is somewhat unintuitive as a result.

As the default index is pypi, which is the default for pip anyway, this
is a redundant hard-code which really shouldn't be required.

The specification of additional indexes should also be optional, as the
default of using pypi again just results in a duplicated check by pip.

Also, for context, OpenStack-CI gating will prefer the use of a
system-wide pip.conf which will be copied from the host to the container.
Without this patch, that simple solution to our gating process will not
work.

Change-Id: I25e4faecbffad6301509c62f55c34ba86b92a658

defaults/main.yml

@@ -49,9 +49,13 @@ repo_build_apt_packages:
   - python-dev
   - swig
 
-repo_build_pip_default_index: "https://pypi.python.org/simple"
-repo_build_pip_extra_indexes:
-  - "https://pypi.python.org/simple"
+# Optionally set this to change the default index from pypi to an alternative
+#repo_build_pip_default_index: "https://pypi.python.org/simple"
+
+# Optionally set this to a list of extra indexes to be used when building wheels
+#repo_build_pip_extra_indexes:
+#  - "https://pypi.python.org/simple"
+
 # TODO(odyssey4me): Deprecate this var for Mitaka & mark for removal
 #                   in Newton.
 # repo_build_pip_extra_index: "https://pypi.python.org/simple"

tasks/repo_build.yml

@@ -20,12 +20,12 @@
               --find-links {{ repo_build_global_links_path }} \
               --find-links {{ repo_build_output }} \
               --constraint {{ repo_build_release_path }}/{{ repo_build_release_tag }}/requirements_constraints.txt \
-              --index-url {{ repo_build_pip_default_index }} \
-              --trusted-host {{ repo_build_pip_default_index | netloc_no_port }} \
+              {% if repo_build_pip_default_index is defined %}--index-url {{ repo_build_pip_default_index }} \
+              --trusted-host {{ repo_build_pip_default_index | netloc_no_port }} \{% endif %}
               {% if repo_build_pip_extra_index is defined %}--extra-index-url {{ repo_build_pip_extra_index }} \
               --trusted-host {{ repo_build_pip_extra_index | netloc_no_port }} \{% endif %}
-              --extra-index-url {{ repo_build_pip_extra_indexes | join(' --extra-index-url ') }} \
-              --trusted-host {{ repo_build_pip_extra_indexes | map('netloc_no_port') | join(' --trusted-host ') }} \
+              {% if repo_build_pip_extra_indexes is defined %}--extra-index-url {{ repo_build_pip_extra_indexes | join(' --extra-index-url ') }} \
+              --trusted-host {{ repo_build_pip_extra_indexes | map('netloc_no_port') | join(' --trusted-host ') }} \{% endif %}
               --build {{ repo_build_dir }} \
               --log /var/log/repo/repo_builder.log \
               --requirement {{ repo_build_release_path }}/{{ repo_build_release_tag }}/requirements_global_requirements.txt
@@ -40,12 +40,12 @@
               --find-links {{ repo_build_global_links_path }} \
               --find-links {{ repo_build_output }} \
               --constraint {{ repo_build_release_path }}/{{ repo_build_release_tag }}/requirements_constraints.txt \
-              --index-url {{ repo_build_pip_default_index }} \
-              --trusted-host {{ repo_build_pip_default_index | netloc_no_port }} \
+              {% if repo_build_pip_default_index is defined %}--index-url {{ repo_build_pip_default_index }} \
+              --trusted-host {{ repo_build_pip_default_index | netloc_no_port }} \{% endif %}
               {% if repo_build_pip_extra_index is defined %}--extra-index-url {{ repo_build_pip_extra_index }} \
               --trusted-host {{ repo_build_pip_extra_index | netloc_no_port }} \{% endif %}
-              --extra-index-url {{ repo_build_pip_extra_indexes | join(' --extra-index-url ') }} \
-              --trusted-host {{ repo_build_pip_extra_indexes | map('netloc_no_port') | join(' --trusted-host ') }} \
+              {% if repo_build_pip_extra_indexes is defined %}--extra-index-url {{ repo_build_pip_extra_indexes | join(' --extra-index-url ') }} \
+              --trusted-host {{ repo_build_pip_extra_indexes | map('netloc_no_port') | join(' --trusted-host ') }} \{% endif %}
               --build {{ repo_build_dir }} \
               --log /var/log/repo/repo_builder.log \
               --requirement {{ repo_build_release_path }}/{{ repo_build_release_tag }}/requirements_local_filtered.txt

templates/op-release-script.sh.j2

@@ -58,3 +58,4 @@ unset PKG_DIRECTORY
 unset PKG_LOWER
 
 {% endfor %}
+