Merge pull request #463 from YunoHost/ynh-render-template-with-jinja2

[enh] Add ynh_render_template helper to render templates with jinja2

data/helpers.d/utils

@@ -257,3 +257,20 @@ ynh_local_curl () {
 	# Curl the URL
 	curl --silent --show-error -kL -H "Host: $domain" --resolve $domain:443:127.0.0.1 $POST_data "$full_page_url"
 }
+
+# Render templates with Jinja2
+# 
+# Attention : Variables should be exported before calling this helper to be
+# accessible inside templates.
+#
+# usage: ynh_render_template some_template output_path
+# | arg: some_template - Template file to be rendered
+# | arg: output_path   - The path where the output will be redirected to
+ynh_render_template() {
+   local template_path=$1
+   local output_path=$2
+   # Taken from https://stackoverflow.com/a/35009576
+   python2.7 -c 'import os, sys, jinja2; sys.stdout.write(
+                    jinja2.Template(sys.stdin.read()
+                 ).render(os.environ));' < $template_path > $output_path
+}

debian/control

@@ -12,7 +12,7 @@ Architecture: all
 Depends: ${python:Depends}, ${misc:Depends}
  , moulinette (>= 2.7.1), ssowat (>= 2.7.1)
  , python-psutil, python-requests, python-dnspython, python-openssl
- , python-apt, python-miniupnpc, python-dbus
+ , python-apt, python-miniupnpc, python-dbus, python-jinja2
  , glances
  , dnsutils, bind9utils, unzip, git, curl, cron, wget
  , ca-certificates, netcat-openbsd, iproute