Edit botton for all source file. Fixes Issue #30

Signed-off-by: shettygururaj <gururaj.shetty@huawei.com>

_templates/breadcrumbs.html

+{%- extends "sphinx_rtd_theme/breadcrumbs.html" %}
+
+{% block breadcrumbs_aside %}
+{% if display_gitlab_local %}
+  <li class="wy-breadcrumbs-aside">
+    {% if hasdoc(pagename) and pagename != "search" and pagename != "genindex" %}
+    <a href="https://{{ gitlab_local_host|default("gitlab.com") }}/{{ gitlab_local_repo }}/{{ theme_vcs_pageview_mode|default("blob") }}/{{ gitlab_local_version }}{{ conf_py_path }}{{ pagename }}{{ suffix }}" class="fa fa-gitlab"> {{ _('Edit on GitLab') }}</a>
+    {% endif %}
+  </li>
+{% endif %}
+{% endblock %}
\ No newline at end of file

conf.py

@@ -54,7 +54,15 @@ exclude_patterns = []
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'sphinx_rtd_theme'
+html_theme = "sphinx_rtd_theme"
+
+html_context = {
+    "gitlab_local_host": "git.ostc-eu.org",
+    "display_gitlab_local": True, # Integrate Gitlab
+    "gitlab_local_repo": "OSTC/OHOS/docs", # Repo name
+    "gitlab_local_version": "master", # Version
+    "conf_py_path": "/", # Path in the checkout to the docs root
+}
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,