Validate Dockerfile indentation in pep8

Delegate code style validation to computers, they're better than human
at it :)

This commit adds a new `tools/validate-indentation.sh` script that
errors when it finds an indented Dockerfile instruction, and enables
the validation in the pep8 check.

Also adjust the logic of `tools/validate-all-dockerfiles.sh` so that it
doesn't stop on first errors but instead shows all of them.

Fixes the remaining indentations in Dockerfiles.

Change-Id: I53c0d38304cb4f6d64a5dfab67f70d69b3eae587

1 files changed, 4 insertions, 4 deletions

diff --git a/docker/helm-repository/Dockerfile.j2 b/docker/helm-repository/Dockerfile.j2
index c3028f61d..dfb2ebdc2 100644
--- a/docker/helm-repository/Dockerfile.j2
+++ b/docker/helm-repository/Dockerfile.j2
@@ -46,12 +46,12 @@ RUN curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py \
 
 RUN {{ macros.install_pip(helm_repository_pip_packages | customizable("pip_packages"), constraints = false) }}
 
-ENV helm_arch={{ base_arch }}
-
 {% if base_arch == 'x86_64' %}
-    ENV helm_arch=amd64
+ENV helm_arch=amd64
 {% elif base_arch == 'aarch64' %}
-    ENV helm_arch=arm64
+ENV helm_arch=arm64
+{% else %}
+ENV helm_arch={{ base_arch }}
 {% endif %}
 
 {% block helm_repository_install_kubernetes_helm %}