[libvirt] [jenkins-ci PATCH v2 2/8] lcitool: Use install_url in the unattended install files

[Fabiano Fidêncio]

Passing `url --url={{ install_url }}` to a kickstart file is, according
to Red Hat official documentation[0], mandatory for RHEL 8 and onwards
(which includes CentOS 8).

Using it for RHEL 7, CentOS 7, and Fedora does not cause any issue.

[0]: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/performing_an_advanced_rhel_installation/kickstart-commands-and-options-reference_installing-rhel-as-an-experienced-user

Signed-off-by: Fabiano Fidêncio <fidencio at redhat.com>
Reviewed-by: Andrea Bolognani <abologna at redhat.com>
---
 guests/configs/kickstart.cfg | 6 ++++++
 guests/lcitool               | 9 +++++++++
 2 files changed, 15 insertions(+)

diff --git a/guests/configs/kickstart.cfg b/guests/configs/kickstart.cfg
index 713557a..76b7b65 100644
--- a/guests/configs/kickstart.cfg
+++ b/guests/configs/kickstart.cfg
@@ -1,3 +1,9 @@
+# Installation source
+#
+# The operating system will be installed from the following URL
+url --url={{ install_url }}
+
+
 # Installer configuration
 #
 # Perform a text based installation followed by a reboot, and disable
diff --git a/guests/lcitool b/guests/lcitool
index 379fecc..803477e 100755
--- a/guests/lcitool
+++ b/guests/lcitool
@@ -542,9 +542,18 @@ class Application:
 
             # Unattended install scripts are being generated on the fly, based
             # on the templates present in guests/configs/
+            unattended_options = [
+                "install_url",
+            ]
+
             initrd_template = os.path.join(base, "configs", install_config)
             with open(initrd_template, 'r') as template:
                 content = template.read()
+                for option in unattended_options:
+                    content = content.replace(
+                        "{{ " + option + " }}",
+                        facts[option]
+                    )
 
                 tempdir = tempfile.mkdtemp()
                 initrd_inject = os.path.join(tempdir, install_config)
-- 
2.23.0