[Libosinfo] [PATCHv2 1/2] installer: API to generate commandline info

[Fabiano Fidêncio]

Each OS has a specific method to handle unattended installations.
To start an unattended installation is needed pass a command line to the kernel
specifying the method that will be used  (kickstart for Fedora, autoyast for
OpenSuSE's) and its necessary informations to load the install script.

This API enables apps to query such command line, if any.
---
 osinfo/libosinfo.syms          |  2 ++
 osinfo/osinfo_install_script.c | 49 ++++++++++++++++++++++++++++++++++++++++--
 osinfo/osinfo_install_script.h |  4 ++++
 3 files changed, 53 insertions(+), 2 deletions(-)

diff --git a/osinfo/libosinfo.syms b/osinfo/libosinfo.syms
index 8fcf327..bb5fc6f 100644
--- a/osinfo/libosinfo.syms
+++ b/osinfo/libosinfo.syms
@@ -414,6 +414,8 @@ LIBOSINFO_0.2.6 {
 } LIBOSINFO_0.2.3;
 
 LIBOSINFO_0.2.7 {
+	osinfo_install_script_generate_command_line;
+
 	osinfo_platform_get_all_devices;
 } LIBOSINFO_0.2.6;
 
diff --git a/osinfo/osinfo_install_script.c b/osinfo/osinfo_install_script.c
index 3d5fe8d..42e977b 100644
--- a/osinfo/osinfo_install_script.c
+++ b/osinfo/osinfo_install_script.c
@@ -732,6 +732,7 @@ static xmlNodePtr osinfo_install_script_generate_entity_xml(OsinfoInstallScript
 static xmlDocPtr osinfo_install_script_generate_config_xml(OsinfoInstallScript *script,
                                                            OsinfoOs *os,
                                                            OsinfoInstallConfig *config,
+                                                           const gchar *node_name,
                                                            GError **error)
 {
     xmlDocPtr doc = xmlNewDoc((xmlChar *)"1.0");
@@ -740,7 +741,7 @@ static xmlDocPtr osinfo_install_script_generate_config_xml(OsinfoInstallScript *
 
     root = xmlNewDocNode(NULL,
                          NULL,
-                         (xmlChar*)"install-script-config",
+                         (xmlChar*)node_name,
                          NULL);
     xmlDocSetRootElement(doc, root);
 
@@ -820,13 +821,14 @@ static gboolean osinfo_install_script_apply_template(OsinfoInstallScript *script
                                                      OsinfoOs *os,
                                                      const gchar *templateUri,
                                                      const gchar *template,
+                                                     const gchar *node_name,
                                                      gchar **result,
                                                      OsinfoInstallConfig *config,
                                                      GError **error)
 {
     gboolean ret = FALSE;
     xsltStylesheetPtr templateXsl = osinfo_install_script_load_template(templateUri, template, error);
-    xmlDocPtr configXml = osinfo_install_script_generate_config_xml(script, os, config, error);
+    xmlDocPtr configXml = osinfo_install_script_generate_config_xml(script, os, config, node_name, error);
 
     if (!templateXsl || !configXml)
         goto cleanup;
@@ -871,6 +873,7 @@ static void osinfo_install_script_template_loaded(GObject *src,
                                               data->os,
                                               uri,
                                               input,
+                                              "install-script-config",
                                               &output,
                                               data->config,
                                               &error)) {
@@ -915,6 +918,7 @@ void osinfo_install_script_generate_async(OsinfoInstallScript *script,
                                                   os,
                                                   "<data>",
                                                   templateData,
+                                                  "install-script-config",
                                                   &output,
                                                   data->config,
                                                   &error)) {
@@ -1196,6 +1200,46 @@ GFile *osinfo_install_script_generate_output(OsinfoInstallScript *script,
     return data.file;
 }
 
+/**
+ * osinfo_install_script_generate_command_line:
+ * @script: the install script
+ * @os:     the os entity
+ * @config: the install script config
+ *
+ * Some install scripts needs pass a command line to the kernel, specifing the
+ * installation method to be used to provide an unattended installation and the
+ * necessary parameters like the media where the install script file can be
+ * found, the install script filename, etc. Such install scripts belongs to OSs
+ * that provide paths to the kernel and initrd files that are needed for direct
+ * boot.
+ *
+ * Returns: (transfer full): The generated command line string, NULL otherwise.
+ */
+gchar *osinfo_install_script_generate_command_line(OsinfoInstallScript *script,
+                                                   OsinfoOs *os,
+                                                   OsinfoInstallConfig *config)
+{
+    const gchar *templateData = osinfo_install_script_get_template_data(script);
+    gchar *output = NULL;
+
+    if (templateData) {
+        GError *error = NULL;
+        if (!osinfo_install_script_apply_template(script,
+                                                  os,
+                                                  "<data>",
+                                                  templateData,
+                                                  "command-line",
+                                                  &output,
+                                                  config,
+                                                  &error)) {
+            g_prefix_error(&error, "%s", _("Failed to apply script template: "));
+        }
+    }
+
+    return output;
+}
+
+
 OsinfoPathFormat osinfo_install_script_get_path_format(OsinfoInstallScript *script)
 {
     return osinfo_entity_get_param_value_enum
@@ -1266,6 +1310,7 @@ int osinfo_install_script_get_post_install_drivers_signing_req(OsinfoInstallScri
          OSINFO_DEVICE_DRIVER_SIGNING_REQ_NONE);
 }
 
+
 /*
  * Local variables:
  *  indent-tabs-mode: nil
diff --git a/osinfo/osinfo_install_script.h b/osinfo/osinfo_install_script.h
index e94c88c..c3ec3c4 100644
--- a/osinfo/osinfo_install_script.h
+++ b/osinfo/osinfo_install_script.h
@@ -175,6 +175,10 @@ GFile *osinfo_install_script_generate_output(OsinfoInstallScript *script,
                                              GCancellable *cancellable,
                                              GError **error);
 
+gchar *osinfo_install_script_generate_command_line(OsinfoInstallScript *script,
+                                                   OsinfoOs *os,
+                                                   OsinfoInstallConfig *config);
+
 gboolean osinfo_install_script_has_config_param(const OsinfoInstallScript *script, const OsinfoInstallConfigParam *config_param);
 
 gboolean osinfo_install_script_has_config_param_name(const OsinfoInstallScript *script, const gchar *name);
-- 
1.8.2