feat(helm): publish the helm package

USAGE
=====

include:
  - project: EOLE/Infra/ci-tools
    ref: master
    file: /templates/Helm.yaml

stages:
  - release

helm publish: {extends: '.helm:push'}

REQUIREMENTS
============

- a `release` stage must be present in your pipeline or it must be
  overriden by the extending job to feet your need.

- the `.not-on-stable` rules templates or it must be overriden by
  the extending job to feet your need

- `HELM_REPO` variable: URL of the helm ChartMuseum

- `HELM_REPO_USERNAME` variable : name of the user with write access
  to the ChartMuseum

- `HELM_REPO_PASSWORD` variable: password of `HELM_REPO_USERNAME`

OPTIONAL VARIABLES
==================

- `CHART_DIR`: directory of the helm chart, default to `.`

- `HELM_IMAGE`: name of the `helm` docker image to use

- `HELM_ARGS`: optional arguments to pass to `helm cm-push` command,
  empty by default

- `HELM_BUILD_DIR`: write package chart in this directory, default
  to `build`

templates/Helm.yaml

@@ -7,6 +7,9 @@
 #
 # - `.helm:build`: build the helm package tgz file
 #
+# - `.helm:push`: push the helm package tgz file to a remote
+#   repository
+#
 ---
 #
 # .helm:lint
@@ -118,6 +121,71 @@
     - echo -e "\e[0Ksection_end:$(date +%s):helm-package\r\e[0K"
 
 
+#
+# .helm:push
+# ==========
+#
+# Push the helm package tgz file to a remote repository
+#
+# USAGE
+# =====
+#
+# include:
+#   - project: EOLE/Infra/ci-tools
+#     ref: master
+#     file: /templates/Helm.yaml
+#
+# stages:
+#   - release
+#
+# helm publish: {extends: '.helm:push'}
+#
+# REQUIREMENTS
+# ============
+#
+# - a `release` stage must be present in your pipeline or it must be
+#   overriden by the extending job to feet your need.
+#
+# - the `.not-on-stable` rules templates or it must be overriden by
+#   the extending job to feet your need
+#
+# - `HELM_REPO` variable: URL of the helm ChartMuseum
+#
+# - `HELM_REPO_USERNAME` variable: name of the user with write access
+#   to the ChartMuseum
+#
+# - `HELM_REPO_PASSWORD` variable: password of `HELM_REPO_USERNAME`
+#
+# OPTIONAL VARIABLES
+# ==================
+#
+# - `CHART_DIR`: directory of the helm chart, default to `.`
+#
+# - `HELM_IMAGE`: name of the `helm` docker image to use
+#
+# - `HELM_ARGS`: optional arguments to pass to `helm cm-push` command,
+#   empty by default
+#
+# - `HELM_BUILD_DIR`: write package chart in this directory, default
+#   to `build`
+#
+# USED CI VARIABLES
+# =================
+#
+.helm:push:
+  stage: release
+  extends:
+    - .helm:base
+    - .on-release-tag
+  script:
+    - echo -e "\e[0Ksection_start:$(date +%s):helm-cm-push-config[collapsed=true]\r\e[0KPrepare environment to push to helm remote repository '${HELM_REPO}'"
+    - helm repo add chartrepo "${HELM_REPO}"
+    - echo -e "\e[0Ksection_end:$(date +%s):helm-cm-push-config\r\e[0K"
+    - echo -e "\e[0Ksection_start:$(date +%s):helm-cm-push\r\e[0KExecute 'helm cm-push ${HELM_BUILD_DIR}/* chartrepo'"
+    - helm cm-push "${HELM_BUILD_DIR}"/* chartrepo
+    - echo -e "\e[0Ksection_end:$(date +%s):helm-cm-push\r\e[0K"
+
+
 .helm:base:
   extends: .not-on-stable
   image: